How to use add() in android PriorityBlockingQueue?

Before getting into an example, we should know what PriorityBlockingQueueis. It is an unbounded queue and follows the same order as a priority queue. The main usage of priority blocking queue is, it going to handle out of memory error.

This example demonstrates How to use add() in android PriorityBlockingQueue

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
   xmlns:app="https://schemas.android.com/apk/res-auto"
   xmlns:tools="https://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:gravity="center"
   android:layout_height="match_parent"
   tools:context=".MainActivity"
   android:orientation="vertical">
   <TextView
      android:id="@+id/actionEvent"
      android:textSize="40sp"
      android:layout_marginTop="30dp"
      android:layout_width="wrap_content"
      android:layout_height="match_parent" />
</LinearLayout>

In the above code, we have taken a text view to show PriorityBlockingQueue elements.

Step 3 − Add the following code to src/MainActivity.java

package com.example.myapplication;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
import java.util.concurrent.PriorityBlockingQueue;
public class MainActivity extends AppCompatActivity {
   PriorityBlockingQueue priorityBlockingQueue;
   @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      priorityBlockingQueue = new PriorityBlockingQueue();
      final TextView actionEvent = findViewById(R.id.actionEvent);
      priorityBlockingQueue.add("sai");
      priorityBlockingQueue.add("ram");
      priorityBlockingQueue.add("krishna");
      priorityBlockingQueue.add("prasad");
      priorityBlockingQueue.add("ram");
      actionEvent.setText("" + priorityBlockingQueue);
   }
}

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from an android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −