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    copied!<p>I completely agree with Michael there is no robust way of finding out when the call has been answered by the calle in android. i.e TelephonyManager. <strong>CALL_STATE_OFFHOOK</strong> will set as soon as you make a call.</p> <p>try this example you will understand </p> <pre><code>public class BroadcastReceiverImpl extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { Toast.makeText(context, "Monitoring The Network !! ", Toast.LENGTH_LONG).show(); PhoneStateListnerImpl phoneStateListnerImpl = new PhoneStateListnerImpl(context); TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(context.TELEPHONY_SERVICE); telephonyManager.listen(phoneStateListnerImpl, PhoneStateListener.LISTEN_CALL_STATE); } private class PhoneStateListnerImpl extends PhoneStateListener{ private Context mContext; public PhoneStateListnerImpl(Context mContext) { this.mContext = mContext; } @Override public void onCallStateChanged(int state, String incomingNumber) { switch (state) { case TelephonyManager.CALL_STATE_RINGING: Toast.makeText(mContext, "Phone is Ringng ", Toast.LENGTH_LONG).show(); break; case TelephonyManager.CALL_STATE_OFFHOOK: Toast.makeText(mContext, "Phone is Answered ", Toast.LENGTH_LONG).show(); break; case TelephonyManager.CALL_STATE_IDLE: Toast.makeText(mContext, "Call Is Over ", Toast.LENGTH_LONG).show(); abortBroadcast(); break; default: break; } } } } manifest : &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.pervazive.monitor_network_v08" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16" /&gt; &lt;uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" /&gt; &lt;uses-permission android:name="android.permission.READ_PHONE_STATE" /&gt; &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt; &lt;uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /&gt; &lt;application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" &gt; &lt;receiver android:name="com.example.broadcastreceiver.BroadcastReceiverImpl" android:enabled="true" android:exported="true" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.ACTION_PHONE_STATE_CHANGED" /&gt; &lt;action android:name="android.intent.action.ACTION_NEW_OUTGOING_CALL" /&gt; &lt;action android:name="android.intent.action.PHONE_STATE" /&gt; &lt;action android:name="android.intent.action.NEW_OUTGOING_CALL" /&gt; &lt;/intent-filter&gt; &lt;/receiver&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre>
 

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