java - Android Broadcast receiver for call not working? (Marshmallow)

Question

I am trying to display toast after receiving an call, I have implemented all necessary things needed to register broadcast receiver but it is not displaying toast. I am trying to run this program on Marshmallow device

MyCallReceiver.java -

package com.suhas.callreceiver;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;

public class MyCallReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_RINGING)) {
        // This code will execute when the phone has an incoming call

        // get the phone number
        String incomingNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
        Toast.makeText(context, "Call from:" +incomingNumber, Toast.LENGTH_LONG).show();
        Log.d("MyTrack call", "call receive");

    } else if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(
            TelephonyManager.EXTRA_STATE_IDLE))
    {
        Toast.makeText(context, "Detected call hangup event", Toast.LENGTH_LONG).show();
    }
    else if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(
            TelephonyManager.EXTRA_STATE_OFFHOOK)) {
        // This code will execute when the call is disconnected

    }
}
}

AndroidManifest.xml -

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.suhas.msgmanager">

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/msgis"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>


    <activity android:name="com.example.suhas.msgmanager.MyDialog" android:launchMode="singleTask"
        android:theme="@android:style/Theme.Translucent" />

    <service android:name="com.example.suhas.msgmanager.ChatHeadService"></service>

    <receiver android:name=".MyCallReceiver">
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
        </intent-filter>
    </receiver>

    <activity android:name=".AddMessageActivity">
    </activity>
</application>

</manifest>

I have one MainActivity with one default label saying Hello World.

Answer 1

In Case of Marshmallow Version, We have a concept called Runtime permission which is to be made inside Activity in order to work with the permission. Runtime permission provides a way to ask user for particular permission at runtime while he runs activity for first time.

This are two things you have to specify :

//specify any constant number for permission

  public final static int MY_PERMISSIONS_REQUEST_READ_PHONE_STATE = 11;

// Specify following bit of code in OnCreate method

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Here, thisActivity is the current activity
    if (ContextCompat.checkSelfPermission(getApplicationContext(),
            Manifest.permission.READ_PHONE_STATE)
            != PackageManager.PERMISSION_GRANTED) {

        // Should we show an explanation?
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.READ_CONTACTS)) {
        } else {
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.READ_PHONE_STATE},
                    MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
        }
    }
}

//specify this method which will popup window asking user for permission at runtime

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_READ_PHONE_STATE: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                } else {
            }
            return;
        }
    }
}

this will provide a way to work with Marshmallow devices