Develop Reference

How to Pass Data From a BroadcastReceiver to an Activity in Android

I am working on my first Android app, which is a paging device. It will intercept a SMS message from a certain number with a certain content in it, display that and then allow the user to send a pre-defined reply back to that same number. I have gathered up code snippets from numerous sources (including stackoverflow of course) but I haven't yet got it working.
My file structure is as shown here
The part I am struggling with is SmsBroadcastReceiver and ReceiveAlert, which should display the content of the SMS and has a button to initiate the reply.
SmsBroadcastReceiver.java looks like this:
package com.example.alert6;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.provider.Telephony;
import android.telephony.SmsMessage;
public class SmsBroadcastReceiver extends BroadcastReceiver {
public static final String EXTRA_MESSAGE = "com.example.alert6.MESSAGE";
#Override
public void onReceive(Context context, Intent intent) {
String smsSender = "";
String smsBody = "";
for (SmsMessage smsMessage : Telephony.Sms.Intents.getMessagesFromIntent(intent)) {
smsSender = smsMessage.getOriginatingAddress();
smsBody = smsMessage.getMessageBody();
}
if (smsSender.equals("+420775367297")) {
if (smsBody.contains("Test")) {
intent.putExtra(EXTRA_MESSAGE, smsBody);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // adding this flag starts the new Activity in a new Task
context.startActivity();
}
}
}
}
ReceiveAlertActivity.java is this:
package com.example.alert6;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class ReceiveAlertActivity extends AppCompatActivity {
private static final int SMS_PERMISSION_CODE = 101;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_receive_alert);
}
// Get the Intent that started this activity and extract the string
Intent intent = getIntent();
String taskingalert = intent.getStringExtra(SmsBroadcastReceiver.EXTRA_MESSAGE);
// Capture the layout's TextView and set the string as its text
TextView receivedAlert = findViewById(R.id.receivedAlert);
receivedAlert.setText(taskingalert);
public boolean respond(View view) {
if (!hasReadSmsPermission()) {
requestReadAndSendSmsPermission();
return false;
}
Intent intent = new Intent(this, SendResponseActivity.class);
startActivity(intent);
return false;
}
/**
* Runtime permission shenanigans
*/
private boolean hasReadSmsPermission() {
return (ContextCompat.checkSelfPermission(ReceiveAlertActivity.this,
Manifest.permission.READ_SMS) == PackageManager.PERMISSION_GRANTED) &&
(ContextCompat.checkSelfPermission(ReceiveAlertActivity.this,
Manifest.permission.RECEIVE_SMS) == PackageManager.PERMISSION_GRANTED) &&
(ContextCompat.checkSelfPermission(ReceiveAlertActivity.this,
Manifest.permission.SEND_SMS) == PackageManager.PERMISSION_GRANTED);
}
private void requestReadAndSendSmsPermission() {
ActivityCompat.requestPermissions(ReceiveAlertActivity.this, new String[]{Manifest.permission.READ_SMS, Manifest.permission.RECEIVE_SMS, Manifest.permission.SEND_SMS},
SMS_PERMISSION_CODE);
}
}
And the manifest is this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.alert6">
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.Alert6">
<activity
android:name=".SendResponseActivity"
android:parentActivityName=".ReceiveAlertActivity">
</activity>
<activity
android:name=".ReceiveAlertActivity"
android:parentActivityName=".MainActivity">
</activity>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name=".SmsBroadcastReceiver"
android:enabled="true"
android:exported="true"
tools:ignore="Instantiatable">
<intent-filter android:priority="999" >
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
</application>
</manifest>
Android Studio is showing errors in SmsBroadcastReceiver and ReceiveAlertActivity but not giving enough information to resolve them.
In SmsBroadcastReceiver, it tells me it cannot resolve method 'startActivity()'. Something needs to go in the brackets, but what?
In ReceiveAlertActivity the problems revolve around receivedalert and taskingalert. It cannot resolve setText because taskingalert is an unknown class. Obviously it's not a class, it's a string so I'm doing something wrong, but what?
Sorting out these problems may not be the end. At the moment I can't test if the app works because the build fails due to the above. Then if I get this lot working, I have some other challenges, like waking up the screen and playing a sound the broadcast receiver is triggered, and stopping the sound when the button is pressed.

You can use an Observable object in your BroadcastReceiver to store the piece of information you want to send and implement the Observer interface in your Activity so that it will be warned of every change occuring to the Observable object.

No reaction for reciving SMS, BroadcastReceiver

I'm new in Android and I tried to receive SMS by my application. Sending SMS is working, so permission should work. First I wanted to show received SMS text in Toast, but I read it would be better to use Log. I'm using it and I not have any sign from BroadcastReciver.
I've tried to add receiver in manifest and Log for view is it working, but I not have anything in logs
MainActivity:
package pl.edu.pwr.student.a235420_ks_a5;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.telephony.SmsManager;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private Button importSimData;
private Button sendMessage;
private EditText smsMessagePhoneNumber;
private EditText smsMessageText;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
importSimData = findViewById(R.id.button1);
sendMessage = findViewById(R.id.button2);
smsMessagePhoneNumber = findViewById(R.id.editText1);
smsMessageText = findViewById(R.id.editText2);
SmsReceiver myReciver = new SmsReceiver();
Log.i("MAIN_ACTIV", "On create");
importSimData.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
// Permission is not granted
Toast.makeText(MainActivity.this, "NO permission!",
Toast.LENGTH_LONG).show();
Toast.makeText(MainActivity.this, "Add permissions in settings",
Toast.LENGTH_LONG).show();
}
else {
Toast.makeText(MainActivity.this, "you have permission!",
Toast.LENGTH_LONG).show();
TelephonyManager tm = (TelephonyManager) MainActivity.this.getSystemService(Context.TELEPHONY_SERVICE);
int phoneType = tm.getPhoneType();
int phoneCallState = tm.getCallState();
int phoneNetworkType = tm.getDataNetworkType();
String phoneSubscriberId = tm.getSubscriberId();
Toast.makeText(MainActivity.this, String.valueOf(phoneType),
Toast.LENGTH_LONG).show();
Toast.makeText(MainActivity.this, String.valueOf(phoneCallState ),
Toast.LENGTH_LONG).show();
Toast.makeText(MainActivity.this, String.valueOf( phoneNetworkType),
Toast.LENGTH_LONG).show();
Toast.makeText(MainActivity.this, phoneSubscriberId,
Toast.LENGTH_LONG).show();
}
}
});
sendMessage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.SEND_SMS)
!= PackageManager.PERMISSION_GRANTED) {
//NO permission
Toast.makeText(MainActivity.this, "NO permission!",
Toast.LENGTH_LONG).show();
Toast.makeText(MainActivity.this, "Add permissions in settings",
Toast.LENGTH_LONG).show();}
else {
//you have
String phoneNumber = smsMessagePhoneNumber.getText().toString();
String smsText = smsMessageText.getText().toString();
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNumber, null, smsText, null, null);
}
}
});
}
}
SMSReceiver:
package pl.edu.pwr.student.a235420_ks_a5;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.util.Log;
import android.widget.Toast;
public class SmsReceiver extends BroadcastReceiver {
private static final String SMS_REC_ACTION =
"android.provider.Telephony.SMS_RECEIVED";
#Override
public void onReceive(Context context, Intent intent) {
Log.i("SMS_RECIVER", "Recived Broadcast");
if (intent.getAction().
equals(SmsReceiver.SMS_REC_ACTION)) {
Log.i("SMS_RECIVER", "Recived SMS");
StringBuilder sb = new StringBuilder();
Bundle bundle = intent.getExtras();
if (bundle != null) {
Object[] pdus = (Object[])
bundle.get("pdus");
for (Object pdu : pdus) {
SmsMessage smsMessage =
SmsMessage.createFromPdu
((byte[]) pdu);
sb.append("body - " + smsMessage.
getDisplayMessageBody());
}
}
Toast.makeText(context, "SMS RECEIVED - "
+ sb.toString(), Toast.LENGTH_LONG).show();
}
}
}
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pl.edu.pwr.student.a235420_ks_a5">
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".SmsReceiver">
<intent-filter android:priority="1000">
<action android:name="android.intent.action.PHONE_STATE" />
<action android:name="PACKAGE_NAME.android.action.broadcast"/>
<action android:name="android.provider.Telephony.SMS_RECEIVED"></action>
</intent-filter>
</receiver>
</application>
</manifest>
I would like to get text from incomming SMS in my app and show it in Log or better in Toast

onActivityResult is not getting called in MainActivity.Java

I am trying to make an app which shows a user selected image which can be set by double-clicking on the button. The app does ask me for an image (which is good) but I don't know how to set it on ImageView if this onActivityResult is not getting called.
MainActivity:
package com.forever.bobby.cheater20;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import com.tomerrosenfeld.customanalogclockview.CustomAnalogClock;
public class MainActivity extends AppCompatActivity {
private static final int PICK_IMAGE = 100;
Button hiddenOnClickListener;
ImageView img;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img = findViewById(R.id.imageView);
CustomAnalogClock customAnalogClock = (CustomAnalogClock) findViewById(R.id.analog_clock);
customAnalogClock.setAutoUpdate(true);
hiddenOnClickListener = (Button) findViewById(R.id.touchButtonHidden);
hiddenOnClickListener.setOnClickListener(new DoubleClickListener() {
#Override
public void onSingleClick(View v) {
Log.e ("mPressesOnce -_-","..");
}
#Override
public void onDoubleClick(View v) {
Log.e ("mPressesTwice -_-","..");
openGallery();
}
});
}
private void openGallery () {
Intent gallery = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.INTERNAL_CONTENT_URI);
startActivityForResult(gallery, 0);
}
#Override
protected void onActivityResult (int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode,data);
Log.e ("SHould Be Steeted","");
if (requestCode == 0) {
Uri imgUri;
imgUri = data.getData();
// img.setImageURI(imgUri);
}
}
}
AndroidManifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.forever.bobby.cheater20">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Any Kind of help is appreciated as I am a newbie

With android sdk >= 23, some permissions e.g. WRITE_EXTERNAL_STORE, READ_EXTERNAL_STORE, etc. you must request it in java code.
Therefore, when user starts using feature need permission, android will show a dialog and user can grant or cancel a permission. You can read more about it on developer.android.com.

Android Permission not Applying

Hope You all having a good day, I am learning android and i'm creating an application that scans for Wifi networks. The code makes sense and i seem to have the permissions correctly yet no permissions are being requested at all. Could you help me to figure out why aren't the permissions being granted? Am I missing anything ? Here is my code:
main activity.java:
package com.example.x.wifilocator;
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.util.List;
import android.annotation.SuppressLint;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private StringBuilder sb = new StringBuilder();
private TextView tv;
List<ScanResult> scanList;
final private int REQUEST_CODE_ASK_PERMISSIONS = 123;
#RequiresApi(api = Build.VERSION_CODES.M)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv= (TextView)findViewById(R.id.txtWifiNetworks);
checkpermission();
}
#RequiresApi(api = Build.VERSION_CODES.M)
private void checkpermission() {
int hasWiFi = checkSelfPermission(Manifest.permission.ACCESS_WIFI_STATE);
if (hasWiFi != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[] {Manifest.permission.ACCESS_WIFI_STATE},
REQUEST_CODE_ASK_PERMISSIONS);
Toast.makeText(this,"No Permission",Toast.LENGTH_LONG);
}
getWifiNetworksList();
}
private void getWifiNetworksList(){
IntentFilter filter = new IntentFilter();
filter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
final WifiManager wifiManager =
(WifiManager)getApplicationContext().getSystemService(Context.WIFI_SERVICE);;
registerReceiver(new BroadcastReceiver(){
#SuppressLint("UseValueOf") #Override
public void onReceive(Context context, Intent intent) {
sb = new StringBuilder();
scanList = wifiManager.getScanResults();
sb.append("\n Number Of Wifi connections :" + " " +scanList.size()+"\n\n");
for(int i = 0; i < scanList.size(); i++){
sb.append(new Integer(i+1).toString() + ". ");
sb.append((scanList.get(i)).toString());
sb.append("\n\n");
}
tv.setText(sb);
}
},filter);
wifiManager.startScan();
}
}
Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<!--Permissions -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Thanks in advance for your efforts.

Java.lang.securityException: Permission Denial: starting Intent

I'm constantly getting a security exception when trying to launch a different activity other than my MainActivity, code works fine when i'm launching my MainActivity but throws an exception when I try to launch any other activity other than MainActivity, I've been looking for answers and got a solution to put -android:exported="true"- in my Manifest, however this doesn't help the problem i'm facing, any help so far will be highly appreciated.
Manifest file for launching MainActivity - (Which works)
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.infamuspips.cess">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:exported="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name=".registration"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_name"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_securityquestions"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_id"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_cellnumber"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_email"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_password"
android:label="#string/app_name"></activity>
<activity
android:name=".Maindrawer"
android:label="#string/title_activity_maindrawer"
android:theme="#style/AppTheme"></activity>
</application>
</manifest>
.
Manifest file for launching registration Activity - (Which don't work)
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.infamuspips.cess">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:exported="true"
android:theme="#style/AppTheme">
<activity android:name=".registration">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_name"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_securityquestions"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_id"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_cellnumber"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_email"
android:label="#string/app_name"></activity>
<activity
android:name=".reg_password"
android:label="#string/app_name"></activity>
<activity
android:name=".Maindrawer"
android:label="#string/title_activity_maindrawer"
android:theme="#style/AppTheme"></activity>
</application>
</manifest>
.
Here's my MainActivity Class
package com.infamuspips.cess;
import android.app.ProgressDialog;
import android.content.ContentValues;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.test.suitebuilder.annotation.Suppress;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.InvalidParameterSpecException;
import java.util.ArrayList;
import java.util.List;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.SecretKeySpec;
import javax.net.ssl.HttpsURLConnection;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "Encryption";
EditText editText,username,password;
Button button;
TextView cancel,forgot_password;
static String Username = null;
static String PassWord = null;
static String GetUsername = null;
static String GetPassword = null;
SecretKey secretKey;
String cipherText, decryptedText;
KeyGenerator keyGen;
Cipher aesCipher;
FileOutputStream fos;
byte[] byteDataToEncrypt, byteCipherText, byteDecryptedText;
TextWatcher textwatcher = new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
String User = username.getText().toString();
String Pass = password.getText().toString();
if (!User.isEmpty() && !Pass.isEmpty()) {
button.setEnabled(true);
} else {
button.setEnabled(false);
}
}
#Override
public void afterTextChanged(Editable s) {
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = (EditText) findViewById(R.id.username);
password = (EditText) findViewById(R.id.password);
editText = (EditText) findViewById(R.id.editText);
username.addTextChangedListener(textwatcher);
password.addTextChangedListener(textwatcher);
button = (Button) findViewById(R.id.logIn);
cancel = (TextView) findViewById(R.id.LoginCancel);
forgot_password = (TextView) findViewById(R.id.forgot_password);
//Set Clickable attributes
cancel.setClickable(true);
button.setEnabled(false);
editText.setEnabled(false);
//Call Operation Methods
username.requestFocus();
//Cancel();
//Forgot_Password();
Log_In();
}
private void Cancel(){
cancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(),registration.class);
startActivity(i);
}
});
}
private void Forgot_Password(){
forgot_password.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
class PerformBackGround extends AsyncTask<Void, Void, String>{
private ProgressDialog mDialog;
public PerformBackGround() {
super();
}
#Override
protected void onPreExecute() {
super.onPreExecute();
mDialog = new ProgressDialog(MainActivity.this);
mDialog.setMessage("Please wait");
mDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mDialog.setProgress(0);
mDialog.setMax(10);
mDialog.setCancelable(false);
mDialog.show();
}
#Override
protected String doInBackground(Void... params) {
try{
String link = "http://*************************";
URL url = new URL(link);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String result = bufferedReader.readLine();
return result;
}catch (Exception e){
return "Exception" + e.getMessage();
}
}
#Override
protected void onPostExecute(String result) {
String jsonStr = result;
String response;
if (jsonStr != null){
try{
JSONObject jsonObj = new JSONObject(jsonStr);
String User = jsonObj.get("name").toString();
String Password = jsonObj.get("surname").toString();
mDialog.cancel();
if (User.equals(Username) && Password.equals(PassWord)){
//String name = jsonObj.get("name").toString();
//String Surname = jsonObj.get("surname").toString();
response = jsonObj.get("surname").toString();
getResponse(response);
Intent i = new Intent(getApplicationContext(),Maindrawer.class);
startActivity(i);
}else{
response = "invalid";
getResponse(response);
}
}catch (Exception e){
mDialog.cancel();
e.printStackTrace();
response = "unable";
getResponse(response);
}
}else{
mDialog.cancel();
response = "unconnect";
getResponse(response);
}
}
}
private void Log_In(){
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//PerformBackGround bg = new PerformBackGround();
username = (EditText) findViewById(R.id.username);
password = (EditText) findViewById(R.id.password);
String user = username.getText().toString();
String pass = password.getText().toString();
Username = user;
PassWord = pass;
//addmodules addm =new addmodules();
//addm.execute();
Toast.makeText(MainActivity.this, md5(username.getText().toString()), Toast.LENGTH_SHORT).show();
Intent i = new Intent(getApplicationContext(),Maindrawer.class);
startActivity(i);
username.getText().clear();
password.getText().clear();
}
});
}
public String md5(String text) {
try {
// Create MD5 Hash
MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
digest.update(text.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
for (int i=0; i<messageDigest.length; i++)
hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}
}
}
Here's my registration Activity - (Which doesn't launch & throws an exception
)
package com.infamuspips.cess;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
/**
* Created by Rebone on 4/24/2016.
*/
public class registration extends AppCompatActivity {
EditText up, firstname, MidName, lastName,Email,id,password, confirmpassword;
Button logIn, Register;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.registration);
up = (EditText) findViewById(R.id.editText1);
logIn = (Button) findViewById(R.id.reg_login);
Register = (Button) findViewById(R.id.reg_register);
up.setEnabled(false);
Register.setEnabled(true);
LogIn();
Register();
}
public void LogIn() {
logIn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
}
});
}
public void Register() {
Register.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String initial = "Nothing";
//Modified
Intent a = new Intent(v.getContext(),reg_name.class);
//Intent a = new Intent(v.getContext(),reg_password.class);
a.putExtra("Results", initial);
startActivity(a);
}
});
}
}
-
And here's the full stack trace
08-09 13:59:52.444 220-10439/? W/ActivityManager: mDVFSLock.acquire()
08-09 13:59:52.444 220-10439/? W/ActivityManager: Permission denied: checkComponentPermission() owningUid=10118
08-09 13:59:52.444 220-10439/? W/ActivityManager: Permission Denial: starting Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.infamuspips.cess/.registration } from null (pid=13769, uid=2000) not exported from uid 10118
08-09 13:59:52.460 220-10439/? W/System.err: at com.android.server.am.ActivityStack.startActivityLocked(ActivityStack.java:2498)
08-09 13:59:52.460 220-10439/? W/System.err: at com.android.server.am.ActivityStack.startActivityMayWait(ActivityStack.java:3095)
08-09 13:59:52.460 220-10439/? W/System.err: at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:2298)
08-09 13:59:52.460 220-10439/? W/System.err: at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:147)
08-09 13:59:52.460 220-10439/? W/System.err: at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:1603)
08-09 13:59:52.460 220-10439/? W/System.err: at android.os.Binder.execTransact(Binder.java:338)
08-09 13:59:52.460 220-10439/? W/System.err: at dalvik.system.NativeStart.run(Native Method)

Replace
<activity android:name=".registration">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
with
<activity android:name="com.infamuspips.cess.registration">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
Clean and rebuild your project