"Call-Back" App - Source Code

<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.moppel.callback"
    android:versionCode="1"
    android:versionName="1.0" xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.CALL_PHONE"/>
<application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/Theme.AppCompat" >
        <activity
            android:name="com.moppel.callback.MainActivity"
            android:label="@string/app_name"
            android:launchMode="singleInstance" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

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

        <activity
            android:name="AlertDialogActivity"
            android:launchMode="singleInstance"
            android:theme="@android:style/Theme.Translucent" >

            <!-- <intent-filter> -->
            <!-- <action android:name="android.intent.action.MAIN" /> -->


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

</manifest>

package com.moppel.callback;

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

public class ReceiverPhoneState extends BroadcastReceiver
{
    static private String anrufNummer = null;

    @Override
    public void onReceive(final Context pContext, final Intent pIntent) {
        try {
            final String phoneState = pIntent.getStringExtra(TelephonyManager.EXTRA_STATE);

            if (TelephonyManager.EXTRA_STATE_RINGING.equals(phoneState)) {
                ReceiverPhoneState.anrufNummer = pIntent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
            }
            else if (TelephonyManager.EXTRA_STATE_IDLE.equals(phoneState) && ReceiverPhoneState.anrufNummer != null) {
//                Toast.makeText(pContext, ReceiverPhoneState.anrufNummer + " hat angerufen!", Toast.LENGTH_LONG).show();
                final Intent intent = new Intent(pContext.getApplicationContext(), AlertDialogActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                intent.putExtra("nummer", ReceiverPhoneState.anrufNummer);
                pContext.startActivity(intent);

                ReceiverPhoneState.anrufNummer = null;
            }
            else {
                ReceiverPhoneState.anrufNummer = null;
            }
        } catch (Exception e) {
            Log.e("Phone Receive Error", " " + e);
        }

    }
}

package com.moppel.callback;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.CountDownTimer;

public class AlertDialogActivity extends Activity
{
//    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        final String nummer = this.getIntent().getExtras().getString("nummer");

        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Call back; schließt in 5 Sekunden");
        builder.setMessage("Soll die Nummer: " + nummer + " zurückgerufen werden?");
        builder.setCancelable(false);
        builder.setPositiveButton("Ja, zurückrufen", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id)    {
                final Intent intent = new Intent(Intent.ACTION_CALL);
                intent.setData(Uri.parse("tel:" + nummer));
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                AlertDialogActivity.this.getApplicationContext().startActivity(intent);

                AlertDialogActivity.this.finish();
            }
        });
        builder.setNegativeButton("Nein, abbrechen", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id)    {
                AlertDialogActivity.this.finish();
            }
        });
        final AlertDialog alert = builder.create();
        alert.show();

        final CountDownTimer timer = new CountDownTimer(10000, 1000) {

            @Override
            public void onTick(long pMillisUntilFinished) {
                alert.setTitle("Call back; schließt in " + pMillisUntilFinished / 1000 + " Sekunden");
            }

            @Override
            public void onFinish() {
                alert.dismiss();
                AlertDialogActivity.this.finish();
            }
        };
        timer.start();
    }
}