Displaying A Message From Broadcastreceiver

I wrote a simple class that extends BroadcastReceiver to handle an incoming call and get the caller's number. Now I want to display that number in a popup window or something simil

Solution 1:

I created a IncomingCallService service that extends from BroadcastReceiver to handle an incoming call and get the caller's number. Now I displayed that Incoming caller number in a popup window like TrueCaller. Its working fine me. Hope it should helpful for you. Please try and let me know. Thanks

CallReceiver.java

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

publicclassCallReceiverextendsBroadcastReceiver {

    static String IncomingNumber;
    @OverridepublicvoidonReceive(final Context context, Intent intent) {
        TelephonyManagerteleMgr= (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
        PhoneStateListenerpsl=newPhoneStateListener() {
        @OverridepublicvoidonCallStateChanged(int state, String incomingNumber) {
            switch (state) {
            case TelephonyManager.CALL_STATE_RINGING:
                IncomingNumber = incomingNumber;
                Log.i("CallReceiverBroadcast", "Incoming call caught. Caller's number is " + incomingNumber + ".");
                Intenti=newIntent(context, IncomingCallService.class);
                context.startService(i);
            case TelephonyManager.CALL_STATE_IDLE:
                Log.i("CallReceiverBroadcast", "CALL_STATE_IDLE");                  
                IncomingCallService.clearView(context);
                // Call Disconnectedbreak;

            case TelephonyManager.CALL_STATE_OFFHOOK:
                Log.i("CallReceiverBroadcast", "CALL_STATE_OFFHOOK");
                IncomingCallService.clearView(context);
                // Call Answer Modebreak;
            }
        }
        };
        teleMgr.listen(psl, PhoneStateListener.LISTEN_CALL_STATE);
        teleMgr.listen(psl, PhoneStateListener.LISTEN_NONE);
    }
}

IncomingCallService.java:

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

publicclassIncomingCallServiceextendsService {

    staticViewview=null;
    static WindowManager wm;
    static LayoutInflater inflater;
    static WindowManager.LayoutParams params;
    privatestatic TextView txtIncomingnumber;
    staticbooleanprocessingAction=false;

    @Overridepublic IBinder onBind(Intent intent) {
        returnnull;
    }

    @OverridepublicintonStartCommand(Intent intent, int flags, int startId) {
    super.onCreate();
    params = newWindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT, 350,
                WindowManager.LayoutParams.TYPE_PHONE, WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                        | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSLUCENT);

    params.gravity = Gravity.LEFT | Gravity.TOP;
    params.flags |= WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;

    wm = (WindowManager) getSystemService(WINDOW_SERVICE);

    inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    view = inflater.inflate(R.layout.activity_main,null);

    wm.addView(view, params);
    txtIncomingnumber = (TextView)view.findViewById(R.id.txtIncomingnumber);
    txtIncomingnumber.setText("You have Incoming Call from " + CallReceiver.IncomingNumber);

        return START_STICKY;
    }

    publicstaticvoidclearView(Context context) {
        wm = (WindowManager) context.getSystemService(WINDOW_SERVICE);
        if(view != null) {
            if(view.isEnabled()){
                wm.removeView(view);
                view = null;
            }           
        }
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?><RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_alignParentLeft="true"android:background="#0090FF"android:padding="10dp"android:keepScreenOn="true" ><TextViewandroid:id="@+id/txtIncomingnumber"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_centerHorizontal="true"android:layout_marginTop="30dp"android:text="Incoming Call Number"android:textColor="#fff" /></RelativeLayout>

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?><manifestxmlns:android="http://schemas.android.com/apk/res/android"package="com.stackoverflow"android:versionCode="1"android:versionName="1.0" ><uses-sdkandroid:minSdkVersion="8"android:targetSdkVersion="18" /><uses-permissionandroid:name="android.permission.READ_PHONE_STATE"/><uses-permissionandroid:name="android.permission.CALL_PHONE" /><uses-permissionandroid:name="android.permission.SYSTEM_ALERT_WINDOW" ></uses-permission><uses-permissionandroid:name="android.permission.VIBRATE"></uses-permission><applicationandroid:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><receiverandroid:name=".CallReceiver" ><intent-filterandroid:priority="99999"><actionandroid:name="android.intent.action.PHONE_STATE"/></intent-filter></receiver><activityandroid:name="com.stackoverflow.MainActivity"android:label="@string/app_name" ><intent-filter><actionandroid:name="android.intent.action.MAIN" /><categoryandroid:name="android.intent.category.LAUNCHER" /></intent-filter></activity><serviceandroid:name=".IncomingCallService"></service></application></manifest>

Solution 2:

If you want to show a dialog from inside your onReceive of the BroadcastReceiver, you have to start a transparent activity with an alert dialog and NEVER called setContentView(). The activity will have an transparent view and only the alert dialog will show..

Your Broadcast Receiver onReceive

@OverridepublicvoidonReceive(Context context, Intent intent) {
Log.i("CallReceiverBroadcast", "onReceive() is called. ");
TelephonyManagerteleMgr=(TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
PhoneStateListenerpsl=newPhoneStateListener() {
    @OverridepublicvoidonCallStateChanged(int state, String incomingNumber) {
        Log.i("CallReceiverBroadcast", "onCallStateChanged() is called. ");
        switch (state) {
        case TelephonyManager.CALL_STATE_RINGING:
            Log.i("CallReceiverBroadcast", "Incoming call caught. Caller's number is " +incomingNumber + ".");
 //start activity which has dialog  
    Intent i=newIntent(context,DialogActivity.class);
     i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     context.startActivity(i);
        }
    }
};
teleMgr.listen(psl, PhoneStateListener.LISTEN_CALL_STATE);
teleMgr.listen(psl, PhoneStateListener.LISTEN_NONE);
}

And your DiaLogActivity

publicclassDialogActivityextendsActivity 
{

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  //dont call setcontent view

    AlertDialog.Builderbuilder=newAlertDialog.Builder(this);
    builder.setMessage("Are you sure you want to exit?").setCancelable(
        false).setPositiveButton("Yes",
        newDialogInterface.OnClickListener() {
            publicvoidonClick(DialogInterface dialog, int id) {
                dialog.cancel();
            }
        }).setNegativeButton("No",
        newDialogInterface.OnClickListener() {
            publicvoidonClick(DialogInterface dialog, int id) {
                dialog.cancel();
            }
        });
    AlertDialogalert= builder.create();
    alert.show();
 }

  }