package in.webxstudio.filesharing;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.IntentFilter;
import android.net.wifi.p2p.WifiP2pManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private WifiP2pManager manager;
private WifiP2pManager.Channel channel;
private BroadcastReceiver broadcastReceiver;
private IntentFilter mIntentFilter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
manager=(WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
Log.d(TAG, "onCreate: manager "+manager);
manager.initialize(this,getMainLooper(),null);
channel=manager.initialize(this,getMainLooper(),null);
broadcastReceiver=new WiFiDirectBroadcastReceiver(manager,channel,this);
mIntentFilter = new IntentFilter();
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
manager.discoverPeers(channel, new WifiP2pManager.ActionListener() {
#Override
public void onSuccess() {
Log.d(TAG, "onSuccess: Peered Discovered");
}
#Override
public void onFailure(int reasonCode) {
Log.d(TAG, "onFailure: Failure Discovering Peers Status Code "+reasonCode);
}
});
}
/* register the broadcast receiver with the intent values to be matched */
#Override
protected void onResume() {
super.onResume();
registerReceiver(broadcastReceiver, mIntentFilter);
}
/* unregister the broadcast receiver */
#Override
protected void onPause() {
super.onPause();
unregisterReceiver(broadcastReceiver);
}
}
I get an error on line number 3 as below..
05-27 20:59:23.807 9498-9498/in.webxstudio.filesharing E/AndroidRuntime: FATAL EXCEPTION: main
Process: in.webxstudio.filesharing, PID: 9498
java.lang.RuntimeException: Unable to start activity ComponentInfo{in.webxstudio.filesharing/in.webxstudio.filesharing.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.net.wifi.p2p.WifiP2pManager$Channel android.net.wifi.p2p.WifiP2pManager.initialize(android.content.Context, android.os.Looper, android.net.wifi.p2p.WifiP2pManager$ChannelListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.net.wifi.p2p.WifiP2pManager$Channel android.net.wifi.p2p.WifiP2pManager.initialize(android.content.Context, android.os.Looper, android.net.wifi.p2p.WifiP2pManager$ChannelListener)' on a null object reference
at in.webxstudio.filesharing.MainActivity.onCreate(MainActivity.java:28)
What is wrong in my code?
For anyone who have the same problem. Please make sure you are running the project with real android device not emulator.
Declare needed permissions for handling the Wi-Fi:
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-feature
android:name="android.hardware.wifi.direct"
android:required="true" />
In you Activity of Fragment adjust this code for your need:
private WifiP2pManager manager;
private boolean isWifiP2pEnabled = false;
private boolean retryChannel = false;
private final IntentFilter intentFilter = new IntentFilter();
private Channel channel;
private BroadcastReceiver receiver = null;
private void initWifiP2P() {
intentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
manager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
channel = manager.initialize(this, getMainLooper(), this);
}
#Override
public void onResume() {
super.onResume();
receiver = new WiFiDirectBroadcastReceiver(manager, channel, this);
registerReceiver(receiver, intentFilter);
}
#Override
public void onPause() {
super.onPause();
unregisterReceiver(receiver);
}
Related
I have tried so many different ways to run background service to get location of user but android system automatically kills service after some time.
Though it works on some devices but not working on most of the devices.
I am building app similar to UBER. I want driver's location to be updated after some interval of time even if app is in background or Foreground until user does not set status to offline
You can use Foreground Service, which is just a normal service with an ongoing notification in the foreground, which stops the OS to stop/kill your service process.
By the way, this does not gurantee that your service will be give CPU/processing time when device goes into Doze or App Standby modes.
Although you cannot bypass these doze, standby and battery optimizations, but I've tested a hack to avoid these by creating a wake lock in your foreground service and starting that service in a separate process.
Hope it helps.
You could use a few mechanisms provided by Android.
For devices running pre-Oreo, you could just use background service as it is and it should live most of the time, keep it on a separate process by declaring it in the manifest file. You can also register to device boot complete broadcast, so you will get a call back when device reboots, you will then have a chance to restart you background service. For devices running oreo+, the most reliable way to go is using a foreground service. Make sure your service is sticky in any case.
Set up fire base schedule job to restart your service in case it stops
Geo fence policy to get additional feedback
Schedule with alarm manager to restart your service in case it stops
Use google activity recognition api you can also get callback to have additional chances to pull more location info
Push notifications
I’d suggest using a combination of all with policy tailored to your application, they together should give you enough about a users location at any time.
Yes, you can do it but maybe it will consume more battery power.
Find below code it will help you,
There is an alternative way to use mobile location, Google has release fused location provider which are more helpful in your case.
1.Add Google Location gradle line in your Build.gradle file
implementation 'com.google.android.gms:play-services-location:15.0.1'
2.Get User Location Using Location Service
import android.Manifest;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Looper;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.NotificationCompat;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationAvailability;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;
import com.uffizio.taskeye.BuildConfig;
import com.uffizio.taskeye.R;
import com.uffizio.taskeye.extra.Constants;
import com.uffizio.taskeye.ui.activity.MainActivity;
/**
* Created by Kintan on 16/8/18.
*/
public class LocationServiceDemo extends Service implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
public static LocationServiceDemo locationService;
private static GoogleApiClient mGoogleApiClient;
private static LocationRequest mLocationRequest;
private FusedLocationProviderClient mFusedProviderClient;
private MyLocationCallback mMyLocationCallback;
private Location curLocation;
#Nullable
#Override
public IBinder onBind(Intent intent) {
return new MyBinder();
}
#Override
public void onCreate() {
super.onCreate();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
showNotificationAndStartForegroundService();
locationService = this;
init();
}
//Google location Api build
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
protected void createLocationRequest() {
mMyLocationCallback = new MyLocationCallback();
mLocationRequest = LocationRequest.create();
mLocationRequest.setInterval(5000);
mLocationRequest.setFastestInterval(3000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setSmallestDisplacement(5.0f);
requestUpdate();
}
//Start Foreground Service and Show Notification to user for Android O and higher Version
private void showNotificationAndStartForegroundService() {
final String CHANNEL_ID = BuildConfig.APPLICATION_ID.concat("_notification_id");
final int REQUEST_CODE = 1;
PendingIntent pendingIntent = PendingIntent.getActivity(this,
REQUEST_CODE, new Intent(this, MainActivity.class),
PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this,
CHANNEL_ID)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(getString(R.string.app_name))
.setAutoCancel(false)
.setContentIntent(pendingIntent);
startForeground(Constants.NOTIFICATION_ID, notificationBuilder.build());
}
public void requestUpdate() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mFusedProviderClient.requestLocationUpdates(mLocationRequest, mMyLocationCallback,
Looper.myLooper());
}
public void removeUpdate() {
mFusedProviderClient.removeLocationUpdates(mMyLocationCallback);
}
#Override
public void onConnected(#Nullable Bundle bundle) {
createLocationRequest();
}
#Override
public void onConnectionSuspended(int i) {
buildGoogleApiClient();
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
buildGoogleApiClient();
}
private void init() {
buildGoogleApiClient();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
mFusedProviderClient = LocationServices.getFusedLocationProviderClient(LocationServiceDemo.this);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
return START_STICKY;
}
mFusedProviderClient.getLastLocation().addOnSuccessListener(location -> {
if (location != null) {
curLocation = location;
}
});
if (mGoogleApiClient.isConnected()) {
createLocationRequest();
} else {
buildGoogleApiClient();
}
return START_STICKY;
}
#Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
startService();
}
#Override
public void onLowMemory() {
super.onLowMemory();
startService();
}
#Override
public void onDestroy() {
super.onDestroy();
startService();
}
public void startService() {
startService(new Intent(LocationServiceDemo.this, LocationServiceDemo.class));
}
public class MyLocationCallback extends LocationCallback {
#Override
public void onLocationResult(LocationResult locationResult) {
//get your location here
if (locationResult.getLastLocation() != null) {
for (Location location : locationResult.getLocations()) {
curLocation = location;
}
}
}
#Override
public void onLocationAvailability(LocationAvailability locationAvailability) {
super.onLocationAvailability(locationAvailability);
}
}
private class MyBinder extends Binder {
LocationServiceDemo getService() {
return LocationServiceDemo.this;
}
}
}
3.Finaly Grant Access the admin permission so,android system will not automatically kills service after some time.
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class LocationHome extends AppCompatActivity {
private static final int REQUEST_CODE = 0;
private DevicePolicyManager mDPM;
private ComponentName mAdminName;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
mAdminName = new ComponentName(this, DeviceAdmin.class);
Button button = new Button();
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Grant Admin Permission
if (mDPM.isAdminActive(mAdminName)) {
startService(new Intent(this, LocationService.class));
} else {
adminPermission();
}
}
});
}
public void adminPermission() {
try {
if (!mDPM.isAdminActive(mAdminName)) {
try {
Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mAdminName);
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "Click on Activate button to secure your application.");
startActivityForResult(intent, REQUEST_CODE);
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//Check Permission is granted or not
if (requestCode == REQUEST_CODE) {
if (resultCode == RESULT_OK) {
startService(new Intent(this, LocationService.class));
} else {
if (!mDPM.isAdminActive(mAdminName)) {
adminPermission();
}
}
}
}
}
Create XMl folder add device_admin.xml
<device-admin>
<uses-policies>
</uses-policies>
</device-admin>
And Finaly Modify Your Manifest and Enjoy.
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-feature
android:name="android.hardware.location.gps"
android:required="false" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:name=".common.MyApplication"
android:theme="#style/AppTheme">
<receiver
android:name=".ui.DeviceAdmin"
android:permission="android.permission.BIND_DEVICE_ADMIN">
<meta-data
android:name="android.app.device_admin"
android:resource="#xml/device_admin" />
<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>
</application>
When my SplashActivity opens the LoginActivity my app crashes.
The following is my SplashActivity.java:
package com.example.android.appName;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import java.util.Timer;
import java.util.TimerTask;
public class SplashActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
Timer timer = new Timer();
timer.schedule(new TimerTask() {
public void run() {
Intent intent = new Intent(SplashActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
}, 1500);
}
}
and my LoginActivity.java:
package com.example.android.appName;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
public class LoginActivity extends AppCompatActivity {
private EditText usernameField = (EditText)findViewById(R.id.username),
passwordField = (EditText)findViewById(R.id.password);
private TextView error = (TextView)findViewById(R.id.error);
private ProgressBar progress = (ProgressBar)findViewById(R.id.progress);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.login_menu, menu);
return true;
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (android.os.Build.VERSION.SDK_INT > 5
&& keyCode == KeyEvent.KEYCODE_BACK
&& event.getRepeatCount() == 0) {
onBackPressed();
return true;
}
return super.onKeyDown(keyCode, event);
}
public void exit(MenuItem item) {
finish();
}
public void signIn(View view) {
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
finish();
}
}
Part of AndroidManifest.xml:
<activity android:name=".SplashActivity"
android:theme="#style/NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".LoginActivity"
android:label="#string/title_activity_login" />
Error in logcat:
04-16 23:24:16.124 4015-4015/com.example.android.appName E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.android.appName, PID: 4015
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.android.appName/com.example.android.appName.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2993)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3248)
at android.app.ActivityThread.access$1000(ActivityThread.java:197)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1681)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6872)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:68)
at android.support.v7.app.AppCompatDelegateImplV7.<init>(AppCompatDelegateImplV7.java:145)
at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:28)
at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:42)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:186)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:168)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:508)
at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:180)
at com.example.android.appName.LoginActivity.<init>(LoginActivity.java:20)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.Class.newInstance(Class.java:1690)
at android.app.Instrumentation.newActivity(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2983)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3248)
at android.app.ActivityThread.access$1000(ActivityThread.java:197)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1681)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6872)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
An Activity is not fully initialized and ready to look up views until after setContentView(...) is called in onCreate().
Only declare the fields like the following:
private EditText usernameField, passwordField;
private TextView error;
private ProgressBar progress;
and then assign the values in onCreate:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
usernameField = (EditText)findViewById(R.id.username);
passwordField = (EditText)findViewById(R.id.password);
error = (TextView)findViewById(R.id.error);
progress = (ProgressBar)findViewById(R.id.progress);
}
Might not be part of the problem but as an extra bit of advice a Timer runs the TimerTask on a background thread and that should be avoided in this case. Replace the Timer with a Handler instead to run it on the UI thread.
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent intent = new Intent(SplashActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
}, 1500);
Views defined in xml file can only be accessed in java code, after setting the ContentView as the required xml file using:
setContentView(R.layout.xml_file_name);
So 1st call above method inside onCreate method and then initialize the View instances inside onCreate or inside the methods in which the instance will be used.
When my SplashActivity opens the LoginActivity my app crashes.
The following is my SplashActivity.java:
package com.example.android.appName;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import java.util.Timer;
import java.util.TimerTask;
public class SplashActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
Timer timer = new Timer();
timer.schedule(new TimerTask() {
public void run() {
Intent intent = new Intent(SplashActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
}, 1500);
}
}
and my LoginActivity.java:
package com.example.android.appName;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
public class LoginActivity extends AppCompatActivity {
private EditText usernameField = (EditText)findViewById(R.id.username),
passwordField = (EditText)findViewById(R.id.password);
private TextView error = (TextView)findViewById(R.id.error);
private ProgressBar progress = (ProgressBar)findViewById(R.id.progress);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.login_menu, menu);
return true;
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (android.os.Build.VERSION.SDK_INT > 5
&& keyCode == KeyEvent.KEYCODE_BACK
&& event.getRepeatCount() == 0) {
onBackPressed();
return true;
}
return super.onKeyDown(keyCode, event);
}
public void exit(MenuItem item) {
finish();
}
public void signIn(View view) {
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
finish();
}
}
Part of AndroidManifest.xml:
<activity android:name=".SplashActivity"
android:theme="#style/NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".LoginActivity"
android:label="#string/title_activity_login" />
Error in logcat:
04-16 23:24:16.124 4015-4015/com.example.android.appName E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.android.appName, PID: 4015
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.android.appName/com.example.android.appName.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2993)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3248)
at android.app.ActivityThread.access$1000(ActivityThread.java:197)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1681)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6872)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:68)
at android.support.v7.app.AppCompatDelegateImplV7.<init>(AppCompatDelegateImplV7.java:145)
at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:28)
at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:42)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:186)
at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:168)
at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:508)
at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:180)
at com.example.android.appName.LoginActivity.<init>(LoginActivity.java:20)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.Class.newInstance(Class.java:1690)
at android.app.Instrumentation.newActivity(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2983)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3248)
at android.app.ActivityThread.access$1000(ActivityThread.java:197)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1681)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6872)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
An Activity is not fully initialized and ready to look up views until after setContentView(...) is called in onCreate().
Only declare the fields like the following:
private EditText usernameField, passwordField;
private TextView error;
private ProgressBar progress;
and then assign the values in onCreate:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
usernameField = (EditText)findViewById(R.id.username);
passwordField = (EditText)findViewById(R.id.password);
error = (TextView)findViewById(R.id.error);
progress = (ProgressBar)findViewById(R.id.progress);
}
Might not be part of the problem but as an extra bit of advice a Timer runs the TimerTask on a background thread and that should be avoided in this case. Replace the Timer with a Handler instead to run it on the UI thread.
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent intent = new Intent(SplashActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
}, 1500);
Views defined in xml file can only be accessed in java code, after setting the ContentView as the required xml file using:
setContentView(R.layout.xml_file_name);
So 1st call above method inside onCreate method and then initialize the View instances inside onCreate or inside the methods in which the instance will be used.
Explanation:
I made this intent service in a new class (connectionchecker.java) which is used to check for internet connection.
Now in my main class (First.java), the values are not recieved because the if() is never executed.
My app doesn't crash, the problem is the TextView is stuck on "CONNECTION:" instead of saying "CONNECTION:You are not connected to the internet." or ""CONNECTION:You are not connected to the internet.".
Code:
First.java
package com.lofty.lofti;
import com.lofty.lofti.util.SystemUiHider;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView.OnKeyboardActionListener;
import android.view.KeyEvent;
import android.view.View.OnKeyListener;
import android.inputmethodservice.KeyboardView;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.content.BroadcastReceiver;
/**
* An example full-screen activity that shows and hides the system UI (i.e.
* status bar and navigation/system bar) with user interaction.
*
* #see SystemUiHider
*/
public class First extends Activity {
/**
* Whether or not the system UI should be auto-hidden after
* {#link #AUTO_HIDE_DELAY_MILLIS} milliseconds.
*/
private static final boolean AUTO_HIDE = true;
/**
* If {#link #AUTO_HIDE} is set, the number of milliseconds to wait after
* user interaction before hiding the system UI.
*/
private static final int AUTO_HIDE_DELAY_MILLIS = 3000;
/**
* If set, will toggle the system UI visibility upon interaction. Otherwise,
* will show the system UI visibility upon interaction.
*/
private static final boolean TOGGLE_ON_CLICK = true;
/**
* The flags to pass to {#link SystemUiHider#getInstance}.
*/
private static final int HIDER_FLAGS = SystemUiHider.FLAG_HIDE_NAVIGATION;
/**
* The instance of the {#link SystemUiHider} for this activity.
*/
private SystemUiHider mSystemUiHider;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActionBar().hide(); // HIDE ACTION BAR.
setContentView(R.layout.activity_first);
EditText enter = (EditText) findViewById(R.id.searchbox);
enter.setOnKeyListener(new OnKeyListener() {
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_ENTER) {
EditText searchbox = (EditText) findViewById(R.id.searchbox);
String search = searchbox.getText().toString();
Intent open = new Intent(Intent.ACTION_WEB_SEARCH);
open.putExtra(SearchManager.QUERY, search);
startActivity(open);
return true;
}
else
{
return false;
}
}
});
}
public class Connection extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent) {
Integer connectionn = intent.getIntExtra("connection",0);
TextView connectiontext = (TextView) findViewById(R.id.connectiontext);
if(connectionn==1)
{
connectiontext.setText("CONNECTION:You are not connected to the internet.");
}
if(connectionn==0)
{
connectiontext.setText("CONNECTION:You are not connected to the internet.");
}
}
}
public void exit(View view)
{
finish();
System.exit(0);
}
public void usernameclick (View view)
{
EditText searchbox = (EditText) findViewById(R.id.searchbox);
String search = searchbox.getText().toString();
Intent open = new Intent(Intent.ACTION_WEB_SEARCH);
open.putExtra(SearchManager.QUERY, search);
startActivity(open);
}
}
connectionchecker.java
package com.lofty.lofti;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.widget.EditText;
public class connectionchecker extends IntentService
{
public static final int connection =0;
public connectionchecker() {
super("connectionchecker");
}
#Override
protected void onHandleIntent(Intent intent) {
ConnectivityManager connectivityManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
if(connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED || connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED|| connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_ETHERNET).getState()== NetworkInfo.State.CONNECTED)
{
Intent data = new Intent(this, First.class);
data.putExtra("connection",1);
sendBroadcast(data);
}
else
{
Intent data = new Intent(this, First.class);
data.putExtra("connection", 0 );
sendBroadcast(data);
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.lofty.lofti" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".First"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/app_name"
android:theme="#style/FullscreenTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".connectionchecker"/>
<receiver android:name=".First$Connection"/>
</application>
</manifest>
Thank you and have a good day.
Logcat:
10-23 16:01:25.765 2175-2175/com.lofty.lofti E/Zygote﹕ MountEmulatedStorage()
10-23 16:01:25.765 2175-2175/com.lofty.lofti E/Zygote﹕ v2
10-23 16:01:25.775 2175-2175/com.lofty.lofti I/SELinux﹕ Function: selinux_compare_spd_ram, SPD-policy is existed. and_ver=SEPF_GT-I9505_5.0.1 ver=27
10-23 16:01:25.775 2175-2175/com.lofty.lofti I/SELinux﹕ Function: selinux_compare_spd_ram , priority [2] , priority version is VE=SEPF_GT-I9505_5.0.1-1_0032
10-23 16:01:25.775 2175-2175/com.lofty.lofti E/SELinux﹕ [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL
10-23 16:01:25.775 2175-2175/com.lofty.lofti I/art﹕ Late-enabling -Xcheck:jni
10-23 16:01:25.955 2175-2175/com.lofty.lofti D/ResourcesManager﹕ creating new AssetManager and set to /data/app/com.lofty.lofti-2/base.apk
10-23 16:01:26.185 2175-2175/com.lofty.lofti D/AndroidRuntime﹕ Shutting down VM
10-23 16:01:26.195 2175-2175/com.lofty.lofti E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.lofty.lofti, PID: 2175
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lofty.lofti/com.lofty.lofti.First}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2693)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2758)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5942)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.support.v7.app.AppCompatDelegateImplV7.createSubDecor(AppCompatDelegateImplV7.java:309)
at android.support.v7.app.AppCompatDelegateImplV7.ensureSubDecor(AppCompatDelegateImplV7.java:278)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:252)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
at com.lofty.lofti.First.onCreate(First.java:68)
at android.app.Activity.performCreate(Activity.java:6289)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2758)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5942)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
10-23 16:06:26.538 2175-2175/? I/Process﹕ Sending signal. PID: 2175 SIG: 9
I just update your code, by following the tuto from Lars http://www.vogella.com/tutorials/AndroidBroadcastReceiver/article.html
You have to register the broadcast receiver before it can receive anything.
Have a look at this question. https://stackoverflow.com/a/4806091/2733216
IntentFilter filter = new IntentFilter(Connection.ACTION_RESP);
registerReceiver(mConnection, filter);
Your service wasn't started (at least in the code you provided)
in your Activity 'onCreate'
// Start your Service
Intent msgIntent = new Intent(this, ConnectionChecker.class);
startService(msgIntent);
You didn't instantiate your BroadCastReceiver
// Instanciate your BCR
mConnection = new Connection();
Define a message :
public static final String ACTION_RESP = "intent.action.MESSAGE_PROCESSED";
Define the message to the Intent
data.setAction(MainActivity.Connection.ACTION_RESP);
Use Default Intent Constructor for the one that are sent from the Service
Intent data = new Intent();
Then finally, the whole code :
Activity
public class MainActivity extends AppCompatActivity {
private Connection mConnection;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EditText enter = (EditText) findViewById(R.id.searchbox);
enter.setOnKeyListener(new View.OnKeyListener() {
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_ENTER) {
EditText searchbox = (EditText) findViewById(R.id.searchbox);
String search = searchbox.getText().toString();
Intent open = new Intent(Intent.ACTION_WEB_SEARCH);
open.putExtra(SearchManager.QUERY, search);
startActivity(open);
return true;
} else {
return false;
}
}
});
// Start your Service
Intent msgIntent = new Intent(this, ConnectionChecker.class);
startService(msgIntent);
// Instanciate BCR
mConnection = new Connection();
// Register BCR
IntentFilter filter = new IntentFilter(Connection.ACTION_RESP);
registerReceiver(mConnection, filter);
}
public class Connection extends BroadcastReceiver {
public static final String ACTION_RESP = "intent.action.MESSAGE_PROCESSED";
#Override
public void onReceive(Context context, Intent intent) {
Integer connectionn = intent.getIntExtra("connection", 0);
TextView connectiontext = (TextView) findViewById(R.id.connectiontext);
if (connectionn == 1)
connectiontext.setText("CONNECTION:You are not connected to the internet.");
else
connectiontext.setText("CONNECTION:You are not connected to the internet.");
}
}
public void exit(View view) {
finish();
System.exit(0);
}
public void usernameclick(View view) {
EditText searchbox = (EditText) findViewById(R.id.searchbox);
String search = searchbox.getText().toString();
Intent open = new Intent(Intent.ACTION_WEB_SEARCH);
open.putExtra(SearchManager.QUERY, search);
startActivity(open);
}
}
Service
public class ConnectionChecker extends IntentService
{
public static final int connection =0;
public ConnectionChecker() {
super("connectionchecker");
}
#Override
protected void onHandleIntent(Intent intent) {
ConnectivityManager connectivityManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
if(connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState() == NetworkInfo.State.CONNECTED || connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED|| connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_ETHERNET).getState()== NetworkInfo.State.CONNECTED)
{
Intent data = new Intent();
data.setAction(MainActivity.Connection.ACTION_RESP);
data.putExtra("connection", 1);
sendBroadcast(data);
}
else
{
Intent data = new Intent();
data.setAction(MainActivity.Connection.ACTION_RESP);
data.putExtra("connection", 0 );
sendBroadcast(data);
}
}
}
the values are not received because the if() is never executed
Pass an action for the Intent, instead of using like this:
Intent data = new Intent(this, First.class);
But, you should:
Intent data = new Intent("ACTION_NAME");
And make sure that you registered that action to manifest:
<receiver android:name=".First$Connection">
<intent-filter>
<action android:name="ACTION_NAME" />
</intent-filter>
</receiver>
the problem is the TextView is stuck
Make an instance variable for connectiontext:
public class First extends Activity {
...
private TextView connectiontext;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
getActionBar().hide(); // HIDE ACTION BAR.
connectiontext = (TextView) findViewById(R.id.connectiontext);
...
}
...
}
I have been trying to learn how Google Cloud Messaging works in Android apps, specifically multicast messaging, so I found a tutorial with source code. Unfortunately I can get the program to compile without error but when it runs, I get a fatal exception. Anyone know what is wrong?
Here is the main activity:
package com.ganyo.pushtest;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gcm.GCMRegistrar;
import static com.ganyo.pushtest.Util.*;
import static com.ganyo.pushtest.Util.TAG;
public class PushMainActivity extends Activity {
private TextView messageTextView;
private Button sendButton;
private AlertDialogManager alert = new AlertDialogManager();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// this is a hack to force AsyncTask to be initialized on main thread. Without this things
// won't work correctly on older versions of Android (2.2, apilevel=8)
try {
Class.forName("android.os.AsyncTask");
} catch (Exception ignored) {}
GCMRegistrar.checkDevice(this);
GCMRegistrar.checkManifest(this);
initUI();
AppServices.loginAndRegisterForPush(this);
}
private void initUI() {
setContentView(R.layout.main);
messageTextView = (TextView)findViewById(R.id.lblMessage);
sendButton = (Button)findViewById(R.id.sendButton);
sendButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
AppServices.sendMyselfANotification(v.getContext());
}
});
registerReceiver(notificationReceiver, new IntentFilter(DISPLAY_MESSAGE_ACTION));
}
/**
* Receives push Notifications
* */
private final BroadcastReceiver notificationReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
// Waking up mobile if it is sleeping
WakeLocker.acquire(getApplicationContext());
/**
* Take some action upon receiving a push notification here!
**/
String message = intent.getExtras().getString(EXTRA_MESSAGE);
if (message == null) { message = "Empty Message"; }
Log.i(TAG, message);
messageTextView.append("\n" + message);
alert.showAlertDialog(context, getString(R.string.gcm_alert_title), message);
Toast.makeText(getApplicationContext(), getString(R.string.gcm_message, message), Toast.LENGTH_LONG).show();
WakeLocker.release();
}
};
// this will be called when the screen rotates instead of onCreate()
// due to manifest setting, see: android:configChanges
#Override
public void onConfigurationChanged(Configuration newConfig)
{
super.onConfigurationChanged(newConfig);
initUI();
}
#Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(notificationReceiver);
}
}
Here is the manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ganyo.pushtest"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16"/>
<permission android:name="com.ganyo.pushtest.permission.C2D_MESSAGE" android:protectionLevel="signature" />
<uses-permission android:name="com.ganyo.pushtest.permission.C2D_MESSAGE" />
<!-- App receives GCM messages. -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<!-- GCM connects to Google Services. -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- GCM requires a Google account. -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<!-- Keeps the processor from sleeping when a message is received. -->
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.VIBRATE"/>
<application android:label="#string/app_name" android:icon="#drawable/ic_launcher">
<activity android:name="com.ganyo.pushtest.PushMainActivity"
android:label="#string/app_name"
android:configChanges="keyboardHidden|orientation|screenSize">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<receiver android:name="com.google.android.gcm.GCMBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.ganyo.pushtest" />
</intent-filter>
</receiver>
<service android:name="GCMIntentService" />
</application>
</manifest>
Here is Appservices:
package com.ganyo.pushtest;
import android.content.Context;
import android.util.Log;
import com.apigee.sdk.ApigeeClient;
import com.apigee.sdk.data.client.DataClient;
import com.apigee.sdk.data.client.callbacks.ApiResponseCallback;
import com.apigee.sdk.data.client.callbacks.DeviceRegistrationCallback;
import com.apigee.sdk.data.client.entities.Device;
import com.apigee.sdk.data.client.entities.Entity;
import com.apigee.sdk.data.client.response.ApiResponse;
import com.apigee.sdk.data.client.utils.JsonUtils;
import com.google.android.gcm.GCMRegistrar;
import com.apigee.sdk.data.client.push.GCMPayload;
import com.apigee.sdk.data.client.push.GCMDestination;
import java.util.HashMap;
import static com.ganyo.pushtest.Util.*;
import static com.ganyo.pushtest.Settings.*;
public final class AppServices {
private static DataClient client;
private static Device device;
static synchronized DataClient getClient(Context context) {
if (client == null) {
if (ORG.equals("<<your org name here>>")) {
Log.e(TAG, "ORG value has not been set.");
} else {
ApigeeClient apigeeClient = new ApigeeClient(ORG,APP,API_URL,context);
client = apigeeClient.getDataClient();
}
}
return client;
}
static void loginAndRegisterForPush(final Context context) {
if ((USER != null) && (USER.length() > 0)) {
DataClient dataClient = getClient(context);
if (dataClient != null) {
dataClient.authorizeAppUserAsync(USER, PASSWORD, new ApiResponseCallback() {
#Override
public void onResponse(ApiResponse apiResponse) {
Log.i(TAG, "login response: " + apiResponse);
registerPush(context);
}
#Override
public void onException(Exception e) {
displayMessage(context, "Login Exception: " + e);
Log.i(TAG, "login exception: " + e);
}
});
} else {
Log.e(TAG,"Data client is null, did you set ORG value in Settings.java?");
}
} else {
registerPush(context);
}
}
static void registerPush(Context context) {
final String regId = GCMRegistrar.getRegistrationId(context);
if ("".equals(regId)) {
GCMRegistrar.register(context, Settings.GCM_SENDER_ID);
} else {
if (GCMRegistrar.isRegisteredOnServer(context)) {
Log.i(TAG, "Already registered with GCM");
} else {
AppServices.register(context, regId);
}
}
}
/**
* Register this user/device pair on App Services.
*/
static void register(final Context context, final String regId) {
Log.i(TAG, "registering device: " + regId);
DataClient dataClient = getClient(context);
if (dataClient != null) {
dataClient.registerDeviceForPushAsync(dataClient.getUniqueDeviceID(), NOTIFIER, regId, null, new DeviceRegistrationCallback() {
#Override
public void onResponse(Device device) {
Log.i(TAG, "register response: " + device);
AppServices.device = device;
displayMessage(context, "Device registered as: " + regId);
DataClient dataClient = getClient(context);
if (dataClient != null) {
// connect Device to current User - if there is one
if (dataClient.getLoggedInUser() != null) {
dataClient.connectEntitiesAsync("users", dataClient.getLoggedInUser().getUuid().toString(),
"devices", device.getUuid().toString(),
new ApiResponseCallback() {
#Override
public void onResponse(ApiResponse apiResponse) {
Log.i(TAG, "connect response: " + apiResponse);
}
#Override
public void onException(Exception e) {
displayMessage(context, "Connect Exception: " + e);
Log.i(TAG, "connect exception: " + e);
}
});
}
} else {
Log.e(TAG,"data client is null, did you set ORG value in Settings.java?");
}
}
#Override
public void onException(Exception e) {
displayMessage(context, "Register Exception: " + e);
Log.i(TAG, "register exception: " + e);
}
#Override
public void onDeviceRegistration(Device device) { /* this won't ever be called */ }
});
} else {
Log.e(TAG, "Data client is null, did you set ORG value in Settings.java?");
}
}
static void sendMyselfANotification(final Context context) {
if (device == null) {
displayMessage(context, "Device not registered. ORG value set in Settings.java?");
} else {
DataClient dataClient = getClient(context);
if (dataClient != null) {
GCMDestination destination = GCMDestination.destinationSingleDevice(device.getUuid());
GCMPayload payload = new GCMPayload();
payload.setAlertText("Hi there!");
dataClient.pushNotificationAsync(payload, destination, "google", new ApiResponseCallback() {
#Override
public void onResponse(ApiResponse apiResponse) {
Log.i(TAG, "send response: " + apiResponse);
}
#Override
public void onException(Exception e) {
displayMessage(context, "Send Exception: " + e);
Log.i(TAG, "send exception: " + e);
}
});
} else {
Log.e(TAG, "data client is null, did you set ORG value in Settings.java?");
}
}
}
/**
* Unregister this device within the server.
*/
static void unregister(final Context context, final String regId) {
Log.i(TAG, "unregistering device: " + regId);
register(context, "");
}
}
Gmcintentservices:
package com.ganyo.pushtest;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationCompat.Builder;
import com.google.android.gcm.GCMBaseIntentService;
import static com.ganyo.pushtest.Settings.GCM_SENDER_ID;
import static com.ganyo.pushtest.Util.displayMessage;
public class GCMIntentService extends GCMBaseIntentService {
public GCMIntentService() {
super(GCM_SENDER_ID);
}
/**
* Method called on device registered
**/
#Override
protected void onRegistered(Context context, String registrationId) {
Log.i(TAG, "Device registered: " + registrationId);
displayMessage(context, getString(R.string.gcm_registered, registrationId));
AppServices.register(context, registrationId);
}
/**
* Method called on device unregistered
* */
#Override
protected void onUnregistered(Context context, String registrationId) {
Log.i(TAG, "Device unregistered");
displayMessage(context, getString(R.string.gcm_unregistered, registrationId));
AppServices.unregister(context, registrationId);
}
/**
* Method called on receiving a new message
* */
#Override
protected void onMessage(Context context, Intent intent) {
String message = intent.getExtras().getString("data");
Log.i(TAG, "Received message: " + message);
displayMessage(context, message);
generateNotification(context, message);
}
/**
* Method called on receiving a deleted message
* */
#Override
protected void onDeletedMessages(Context context, int total) {
Log.i(TAG, "Received deleted messages notification");
String message = getString(R.string.gcm_deleted, total);
displayMessage(context, message);
generateNotification(context, message);
}
/**
* Method called on Error
* */
#Override
public void onError(Context context, String errorId) {
Log.i(TAG, "Received error: " + errorId);
displayMessage(context, getString(R.string.gcm_error, errorId));
}
#Override
protected boolean onRecoverableError(Context context, String errorId) {
Log.i(TAG, "Received recoverable error: " + errorId);
displayMessage(context, getString(R.string.gcm_recoverable_error, errorId));
return super.onRecoverableError(context, errorId);
}
/**
* Issues a Notification to inform the user that server has sent a message.
*/
private static void generateNotification(Context context, String message) {
int icon = R.drawable.ic_launcher;
long when = System.currentTimeMillis();
NotificationManager notificationManager = (NotificationManager)
context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent notificationIntent = new Intent(context, PushMainActivity.class);
// set intent so it does not start a new activity
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
Notification notification = new NotificationCompat.Builder(context)
.setContentText(message)
.setContentTitle(context.getString(R.string.app_name))
.setSmallIcon(icon)
.setWhen(when)
.setContentIntent(intent)
.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
// Play default notification sound
notification.defaults |= Notification.DEFAULT_SOUND;
// Vibrate if vibrate is enabled
notification.defaults |= Notification.DEFAULT_VIBRATE;
notificationManager.notify(0, notification);
}
}
Alertdialoguemanager:
package com.ganyo.pushtest;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
public class AlertDialogManager {
public void showAlertDialog(Context context, String title, String message) {
AlertDialog alertDialog = new AlertDialog.Builder(context).create();
alertDialog.setTitle(title);
alertDialog.setMessage(message);
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
}
Util:
package com.ganyo.pushtest;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import com.google.android.gcm.GCMRegistrar;
public final class Util {
static final String TAG = "com.ganyo.pushtest";
static final String DISPLAY_MESSAGE_ACTION = "com.ganyo.pushtest.DISPLAY_MESSAGE";
static final String EXTRA_MESSAGE = "message";
static void displayMessage(Context context, String message) {
Intent intent = new Intent(DISPLAY_MESSAGE_ACTION);
intent.putExtra(EXTRA_MESSAGE, message);
context.sendBroadcast(intent);
}
}
Wakelocker:
package com.ganyo.pushtest;
import android.content.Context;
import android.os.PowerManager;
public abstract class WakeLocker {
private static PowerManager.WakeLock wakeLock;
public static void acquire(Context context) {
if (wakeLock != null) wakeLock.release();
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.ON_AFTER_RELEASE |
PowerManager.ACQUIRE_CAUSES_WAKEUP |
PowerManager.ON_AFTER_RELEASE |
PowerManager.SCREEN_DIM_WAKE_LOCK, "WakeLock");
wakeLock.acquire();
}
public static void release() {
if (wakeLock != null) wakeLock.release(); wakeLock = null;
}
}
Here is the logcat area of the fatal exception:
05-01 00:26:52.757: D/AndroidRuntime(166): Shutting down VM
05-01 00:26:52.777: D/jdwp(166): adbd disconnected
05-01 00:26:52.817: I/AndroidRuntime(166): NOTE: attach of thread 'Binder Thread #3' failed
05-01 00:26:53.050: I/ActivityThread(258): Publishing provider com.svox.pico.providers.SettingsProvider: com.svox.pico.providers.SettingsProvider
05-01 00:26:53.627: I/ActivityManager(58): Start proc com.ganyo.pushtest for activity com.ganyo.pushtest/.PushMainActivity: pid=267 uid=10036 gids={3003}
05-01 00:26:54.687: W/WindowManager(58): No window to dispatch pointer action 0
05-01 00:26:54.707: W/WindowManager(58): No window to dispatch pointer action 1
05-01 00:26:55.467: D/AndroidRuntime(267): Shutting down VM
05-01 00:26:55.467: W/dalvikvm(267): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-01 00:26:55.537: E/AndroidRuntime(267): FATAL EXCEPTION: main
05-01 00:26:55.537: E/AndroidRuntime(267): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.ganyo.pushtest/com.ganyo.pushtest.PushMainActivity}: java.lang.ClassNotFoundException: com.ganyo.pushtest.PushMainActivity in loader dalvik.system.PathClassLoader[/data/app/com.ganyo.pushtest-2.apk]
05-01 00:26:55.537: E/AndroidRuntime(267): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.os.Handler.dispatchMessage(Handler.java:99)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.os.Looper.loop(Looper.java:123)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-01 00:26:55.537: E/AndroidRuntime(267): at java.lang.reflect.Method.invokeNative(Native Method)
05-01 00:26:55.537: E/AndroidRuntime(267): at java.lang.reflect.Method.invoke(Method.java:521)
05-01 00:26:55.537: E/AndroidRuntime(267): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-01 00:26:55.537: E/AndroidRuntime(267): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-01 00:26:55.537: E/AndroidRuntime(267): at dalvik.system.NativeStart.main(Native Method)
05-01 00:26:55.537: E/AndroidRuntime(267): Caused by: java.lang.ClassNotFoundException: com.ganyo.pushtest.PushMainActivity in loader dalvik.system.PathClassLoader[/data/app/com.ganyo.pushtest-2.apk]
05-01 00:26:55.537: E/AndroidRuntime(267): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
05-01 00:26:55.537: E/AndroidRuntime(267): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
05-01 00:26:55.537: E/AndroidRuntime(267): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
05-01 00:26:55.537: E/AndroidRuntime(267): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
05-01 00:26:55.537: E/AndroidRuntime(267): ... 11 more
05-01 00:26:55.617: W/ActivityManager(58): Force finishing activity com.ganyo.pushtest/.PushMainActivity
05-01 00:26:56.499: W/ActivityManager(58): Activity pause timeout for HistoryRecord{460133f8 com.ganyo.pushtest/.PushMainActivity}
05-01 00:26:56.687: I/ARMAssembler(58): generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x3261a0:0x32625c] in 1336038 ns
05-01 00:26:56.777: I/ARMAssembler(58): generated scanline__00000177:03515104_00001001_00000000 [ 91 ipp] (114 ins) at [0x3265b8:0x326780] in 1506105 ns
05-01 00:26:57.337: I/ARMAssembler(58): generated scanline__00000077:03545404_00000004_00000000 [ 47 ipp] (67 ins) at [0x326788:0x326894] in 951792 ns
05-01 00:26:57.967: D/AndroidRuntime(271): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
05-01 00:26:58.009: D/AndroidRuntime(271): CheckJNI is ON
05-01 00:27:00.377: D/AndroidRuntime(271): --- registering native functions ---
Thanks for the help!
It turned out to be all the .java files in the java folder. Once I redid them in the src path, the program worked correctly.