BigPictureStyle Notification

MainActivity.java

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.NotificationCompat;
import android.view.View;
import android.widget.Button;
import java.util.Calendar;
 public class MainActivity extends AppCompatActivity {
  Button btn;
  @Override 
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   btn = (Button) findViewById(R.id.idBtn);
   btn.setOnClickListener(new View.OnClickListener() {
    @Override 
     public void onClick(View v) {
     ClickMe();
   }
  });
 }
 private void ClickMe() {
   // Assign big picture notification 
   NotificationCompat.BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
   bigPictureStyle.bigPicture(
        BitmapFactory.decodeResource(getResources(), 
        R.drawable.avengers)).build();
   // Gets an instance of the NotificationManager service 
   NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
   //set intents and pending intents to call activity on click of "show activity" action button of notification 
   Intent resultIntent = new Intent(this, MainActivity.class);
   resultIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK 
    | Intent.FLAG_ACTIVITY_CLEAR_TASK);
   PendingIntent piResult = PendingIntent.getActivity(this, 
   (int) Calendar.getInstance().getTimeInMillis(), resultIntent, 0);
   //build notification 
   NotificationCompat.Builder builder = 53(NotificationCompat.Builder) new NotificationCompat.Builder(this) 54.setSmallIcon(R.mipmap.ic_launcher) 55.setContentTitle("Big picture notification") 56.setContentText("This is test of big picture notification.") 57.setStyle(bigPictureStyle) 58.addAction(R.drawable.ic_input_black_18dp, "show activity", piResult) 59.addAction(R.drawable.ic_share_black_18dp, "Share", 60 PendingIntent.getActivity(getApplicationContext(), 0, 61 getIntent(), 0, null));
   //to post your notification to the notification bar 
   notificationManager.notify(0, builder.build());
 }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>  
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:paddingBottom="@dimen/activity_vertical_margin" 
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin" 
     tools:context="anu.com.notification.MainActivity"> 
    
    <Button 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/idBtn"
     android:background="#FFCC65" 
     android:text="Click" />  
</RelativeLayout>  ​

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Author : Android Code Tutorial