Develop Reference

why can't i get my call recording app to work?

I'm trying to implement an app that allows me to record the audio of calls, activating the service via a toggle button. I can't figure out what is wrong with my code as once I set the toggle button to ON and initiate the call, there is no file saved.
I don't understand if the problem is in saving (maybe I'm looking for the file in the wrong directory?), Or in the fact that it doesn't actually record.
I'm using AndroidStudio 4.0 and i'm trying my app on my Samsung S9.
Thanks in andvance for helping !
RecordService.java
package com.example.registrachiamate;
import android.app.MediaRouteButton;
import android.app.Service;
import android.content.Intent;
import android.media.MediaRecorder;
import android.os.Environment;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.text.format.DateFormat;
import java.io.File;
import java.io.IOException;
import java.util.Date;
public class RecordService extends Service {
private MediaRecorder rec;
private File file;
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
//return super.onStartCommand(intent, flags, startId);
file= Environment.getExternalStorageDirectory();
Date date=new Date();
CharSequence sdf= DateFormat.format("MM-dd-yy-hh-mm--ss",date.getTime());
rec=new MediaRecorder();
rec.setAudioSource(MediaRecorder.AudioSource.MIC);
rec.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
rec.setOutputFile(file.getAbsolutePath()+"/"+sdf+"rec.3gp");
rec.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
TelephonyManager manager=(TelephonyManager) getApplicationContext().getSystemService(getApplicationContext().TELEPHONY_SERVICE);
assert manager != null;
manager.listen(new PhoneStateListener(){
#Override
public void onCallStateChanged(int state, String phoneNumber) {
//super.onCallStateChanged(state, phoneNumber) {
if (TelephonyManager.CALL_STATE_IDLE==state){
rec.stop();
rec.reset();
rec.release();
stopSelf();
}else if(TelephonyManager.CALL_STATE_OFFHOOK==state && rec==null){
try {
rec.prepare();
} catch (IOException e) {
e.printStackTrace();
}
rec.start();
}
}
},PhoneStateListener.LISTEN_CALL_STATE);
return START_STICKY;
}
}
ActivityButton1.java
package com.example.registrachiamate;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import android.widget.ToggleButton;
import androidx.appcompat.app.AppCompatActivity;
public class ActivityButton1 extends AppCompatActivity {
ToggleButton startandoff;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.button1);
startandoff=(ToggleButton)findViewById(R.id.toggleButton);
}
public void tooglebutton(View view)
{
boolean checked=((ToggleButton)view).isChecked();
if (checked){
Intent intent=new Intent(this,RecordService.class);
startService(intent);
Toast.makeText(getApplicationContext(),"Call Record STARTED",Toast.LENGTH_SHORT).show();
}else {
Intent intent=new Intent(this,RecordService.class);
stopService(intent);
Toast.makeText(getApplicationContext(),"Call Record STOPPED",Toast.LENGTH_SHORT).show();
}
}
}
AndroidManifest.xml, if i put the RecordService, in it stops running
<?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.registrachiamate">
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_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"
tools:ignore="GoogleAppIndexingWarning">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
<action android:name="android.intent.action.PHONE_STATE"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".ActivityButton1"></activity>
<activity android:name=".ActivityButton2"></activity>
<activity android:name=".ActivityButton3"></activity>
<activity android:name=".ActivityButton4"></activity>
<activity android:name=".RecordService"></activity>
</application>
</manifest>

How do I fix Android Image Capture App Crashes

I'm not sure what is going on. I click the button to take the image and my app closes.
I'm attempting to make an app to capture and use an image. I haven't even been able to capture the image.
I get the following message in log cat:
FATAL EXCEPTION: main
Process: com.example.fixmyphysics, PID: 23526
java.lang.IllegalArgumentException: Missing android.support.FILE_PROVIDER_PATHS meta-data
at androidx.core.content.FileProvider.parsePathStrategy(FileProvider.java:613)
at androidx.core.content.FileProvider.getPathStrategy(FileProvider.java:579)
at androidx.core.content.FileProvider.getUriForFile(FileProvider.java:417)
at com.example.fixmyphysics.MainActivity.dispatchPictureTakerAction(MainActivity.java:67)
at com.example.fixmyphysics.MainActivity.access$000(MainActivity.java:27)
at com.example.fixmyphysics.MainActivity$1.onClick(MainActivity.java:44)
at android.view.View.performClick(View.java:7356)
at android.widget.TextView.performClick(TextView.java:14230)
at android.view.View.performClickInternal(View.java:7322)
at android.view.View.access$3200(View.java:846)
at android.view.View$PerformClick.run(View.java:27804)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7073)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
MainActivity.java
package com.example.fixmyphysics;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.FileProvider;
import android.Manifest;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import static android.os.Environment.getExternalStoragePublicDirectory;
public class MainActivity extends AppCompatActivity {
Button picture_btn;
ImageView display;
String pathToFile;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
picture_btn = findViewById(R.id.capture_image);
if (Build.VERSION.SDK_INT >=23){
requestPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 2);
}
picture_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dispatchPictureTakerAction();
}
});
display = findViewById(R.id.imageView4);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK) {
Bitmap imageBitmap = BitmapFactory.decodeFile(pathToFile);
display.setImageBitmap(imageBitmap);
}
}
private void dispatchPictureTakerAction(){
Intent takePic = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePic.resolveActivity(getPackageManager()) !=null){
File photoFile = null;
photoFile = createImageFile();
if (photoFile != null){
pathToFile = photoFile.getAbsolutePath();
Uri photoURI = FileProvider.getUriForFile(MainActivity.this, "com.fixmyphysics.FileProvider", photoFile);
takePic.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePic, 1);
}
}
}
private File createImageFile() {
String name = new SimpleDateFormat("yyyyMMdd__HHmmss").format(new Date());
File storageDir = getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
File image = null;
try {
image = File.createTempFile(name,".jpg", storageDir);
} catch (IOException e){
Log.d("mylog", "Excep : " + e.toString());
}
return image;
}
}
AndroidMainifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.fixmyphysics">
<uses-feature android:name="android.hardware.camera" android:required="true" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<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>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths">
</meta-data>
</provider>
</application>
</manifest>

Try this one.
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />`enter code here`

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.

How to open app running in background programmatically

I have an App where a background service running . When a phone call is detected I want that app to open and show me a particular Intent. How should I do this.
My code is
MainActivity.java
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import java.lang.reflect.Method;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void startService(View view){
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
PhoneStateListener phoneStateListener = new PhoneStateListener(){
#Override
public void onCallStateChanged(int state, String incomingNumber) {
String number = incomingNumber;
Log.d("gaandu", number);
if(state == TelephonyManager.CALL_STATE_RINGING){
Toast.makeText(MainActivity.this, "incoming call from" + incomingNumber, Toast.LENGTH_SHORT).show();
}
if(state == TelephonyManager.CALL_STATE_OFFHOOK){
Toast.makeText(MainActivity.this, "Phone is currently in a call", Toast.LENGTH_SHORT).show();
}
if(state == TelephonyManager.CALL_STATE_IDLE){
Toast.makeText(MainActivity.this, "Phone is neither Ringing nor in a Call", Toast.LENGTH_SHORT).show();
}
}
};
telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
}
public void stopService(View view){
Intent i = new Intent(MainActivity.this, MyService.class);
stopService(i);
}
}
MyService.java
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;
public class MyService extends Service {
#Override
public void onCreate() {
super.onCreate();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "Service Started", Toast.LENGTH_SHORT).show();
return START_STICKY;
}
#Override
public void onDestroy() {
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_SHORT).show();
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
}
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.admin.abab">
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_PHONE_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>
<service android:name=".MyService"
android:exported="false"
/>
</application>
</manifest>
In MainActivity.java, after a phone call has been detected, I want to launch my app running in background to open to its first Activity.

You might want to look into the Android cookbook:
You want to act on an incoming phone call and do something with the incoming number.
Solution:
This can be achieved by implementing a Broadcast receiver and listening for a TelephonyManager.ACTION_PHONE_STATE_CHANGED action.
You probably need to do some more research; depending the version of Android you are targeting!

Try this link. hope this will help you. Transparent your activity will help you some what.
Go through this link also
getWindow().addFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);

Android NFC not opening correct class on tap

I have an app with 2 classes, I need my app to open the second class CardActivity when the NFC tag tapped/swiped. The app opens fine, but MainActivity is run, instead of CardActivity.
I would hazard a guess that this is an issue with my manifest, but it looks correct. Here it is regardless:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.spotsofmagic.spotsofmagic"
android:versionCode="1"
android:versionName="1.0" android:installLocation="auto">
<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="14" />
<uses-permission android:name="android.permission.NFC" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-feature android:name="android.hardware.nfc" android:required="true" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".CardActivity"
android:label="#string/app_name" >
<!-- Handle a collectable card NDEF record -->
<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED"/>
<data android:mimeType="application/vnd.spotsofmagic.spotsofmagic"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
</application>
</manifest>
I'm confident the tag itself is correct, as I have opened it in another app to view it's contents.
Below are the two classes.
CardActivity:
package com.spotsofmagic.spotsofmagic;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.Log;
import android.bluetooth.*;
public class CardActivity extends Activity implements OnClickListener {
private static final String TAG = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.card_activity);
// see if app was started from a tag and show game console
Intent intent = getIntent();
Log.e(TAG, "Hello world. Intent Type: "+ intent.getType());
if(intent.getType() != null && intent.getType().equals(MimeType.NFC_DEMO)) {
Parcelable[] rawMsgs = getIntent().getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
NdefMessage msg = (NdefMessage) rawMsgs[0];
NdefRecord cardRecord = msg.getRecords()[0];
String payload = new String(cardRecord.getPayload());
turnBluetoothOn(payload);
}
}
private void turnBluetoothOn(String payload) {
final AlertDialog.Builder builder=new AlertDialog.Builder(this);
builder.setTitle("Alert Dialog");
builder.setMessage(payload);
builder.setIcon(android.R.drawable.ic_dialog_alert);
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
// Device does not support Bluetooth
}
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
android.os.Process.killProcess(android.os.Process.myPid());
}
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}
MainActivity:
package com.spotsofmagic.spotsofmagic;
import android.app.Activity;
import android.app.AlertDialog;
import android.bluetooth.BluetoothAdapter;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.Log;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener {
private static final String TAG = "Activity...";
private NfcAdapter mAdapter;
private TextView mTextView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
// grab our NFC Adapter
mAdapter = NfcAdapter.getDefaultAdapter(this);
// TextView that we'll use to output messages to screen
mTextView = (TextView)findViewById(R.id.text_view);
displayMessage("Loading payload...");
}
private void displayMessage(String message) {
mTextView.setText(message);
}
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
}
}
Here is the code I used to write the tag. This is done on a different app incidentally:
NdefRecord appRecord = NdefRecord.createApplicationRecord("com.spotsofmagic.spotsofmagic");
// record that contains our custom "retro console" game data, using custom MIME_TYPE
byte[] payload = getPayload().getBytes();
byte[] mimeBytes = MimeType.NFC_DEMO.getBytes(Charset.forName("US-ASCII"));
NdefRecord cardRecord = new NdefRecord(NdefRecord.TNF_MIME_MEDIA, mimeBytes,
new byte[0], payload);
NdefMessage message = new NdefMessage(new NdefRecord[] { cardRecord, appRecord});
// Some code here removed for readability
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
ndef.writeNdefMessage(message);

Does the NDEF message on the tag contain an Android Application Record? That could explain how MainActivity is launched. However, that can only be the cause if the AAR is the first record of the NDEF message on the tag or if the first record does not match the intent filter.