Mettre fin à un appel entrant

bonjour,
j'ai un BroadcastReceiver. Jusque là rien de bien compliqué. Je voudrais pouvoir mettre fin à un appel entrant. J'ai lu pas mal de chose mais je n'ai pas réussi à les faire fonctionner. j'utilise android-studio pour le dev. Si quelqu'un peut m'aider

Code:

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import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.widget.Toast;
import android.view.KeyEvent;
public class AutoReceiverIncomingCall extends BroadcastReceiver {
 
 
    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
 
        String extraState =intent.getStringExtra(TelephonyManager.EXTRA_STATE); //Getting Extra State
        if (extraState.equals(TelephonyManager.EXTRA_STATE_RINGING)) //Checking Phone State (Ringing or Not)
        {
            //If the Phone is Ringing getting the Incoming number/
            String incomingNumber =intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
            if (incomingNumber.contentEquals("+33"))
            {
 
                //---answer the call---
               // Intent buttonUp = new Intent(Intent.ACTION_MEDIA_BUTTON);
                //buttonUp.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HEADSETHOOK));
                //Context().sendOrderedBroadcast(buttonUp, "android.permission.CALL_PRIVILEGED");
                //
                Intent i = new Intent(Intent.ACTION_MEDIA_BUTTON);
                i.putExtra(Intent.EXTRA_KEY_EVENT,new KeyEvent(KeyEvent.ACTION_DOWN,KeyEvent.KEYCODE_HEADSETHOOK));
                context.sendOrderedBroadcast(i, "android.permission.CALL_PRIVILEGED");
 
              // i = new Intent(Intent.ACTION_MEDIA_BUTTON);
               // i.putExtra(Intent.EXTRA_KEY_EVENT,new KeyEvent(KeyEvent.ACTION_UP,KeyEvent.KEYCODE_HEADSETHOOK));
                //context.sendOrderedBroadcast(i, null);
                //sendKeys(KeyEvent.KEYCODE_ENDCALL);
                                   //
                //setResultData(null);
                               Toast.makeText(context, "NEW_OUTGOING_CALL intercepted to number 123-123-1234 - aborting call",
                        Toast.LENGTH_LONG).show();
 
            }
        }
        return;
    }

le manifest

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ui.myapplication6.app"
android:versionCode="1"
android:versionName="1.0" >
 
<uses-sdk android:minSdkVersion="14" />
    <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" /><!-- Permission for Reading Phone State -->
<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <!-- Registering Receiver with  PHONE_STATE  -->
 
    <receiver
        class="com.ui.myapplication6.AutoReceiverIncomingCall"
        android:name="com.ui.myapplication6.AutoReceiverIncomingCall" >
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
            <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
            <action android:name="android.intent.action.MEDIA_BUTTON" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </receiver>
</application>
 
</manifest>