android - Media Player on completion listener example

activity_main.xml

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/root_layout"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:padding="16dp"     android:orientation="vertical"     >     <Button         android:id="@+id/btn_play"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Start"         /> </LinearLayout> 

MainActivity.java

 package com.cfsuman.me.androidcodesnippets;  import android.app.Activity; import android.content.Context; import android.graphics.Color; import android.media.MediaPlayer; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.LinearLayout; import android.widget.Toast;   public class MainActivity extends AppCompatActivity {     private Context mContext;     private Activity mActivity;      private LinearLayout mRootLayout;     private Button mButtonPlay;      private MediaPlayer mPlayer;      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          // Get the application context         mContext = getApplicationContext();         mActivity = MainActivity.this;          // Get the widget reference from xml layout         mRootLayout = findViewById(R.id.root_layout);         mButtonPlay = findViewById(R.id.btn_play);          // set layout background color         mRootLayout.setBackgroundColor(Color.GREEN);          // Click listener for playing button         mButtonPlay.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View view) {                 // If media player another instance already running then stop it first                 stopPlaying();                  // Initialize media player                 mPlayer = MediaPlayer.create(mContext,R.raw.snow_deep_movement);                  /*                     void setOnCompletionListener (MediaPlayer.OnCompletionListener listener)                         Register a callback to be invoked when the end of a media                         source has been reached during playback.                      Parameters                         listener : MediaPlayer.OnCompletionListener: the callback that will be run                 */                 mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {                     @Override                     public void onCompletion(MediaPlayer mediaPlayer) {                         // Do something when media player end playing                         Toast.makeText(mContext,"Media Player End.",Toast.LENGTH_SHORT).show();                          // Change the layout background color                         mRootLayout.setBackgroundColor(Color.RED);                          // Enable play button                         mButtonPlay.setEnabled(true);                     }                 });                  // Start the media player                 mPlayer.start();                 Toast.makeText(mContext,"Media Player is playing.",Toast.LENGTH_SHORT).show();                  // Change layout background color                 mRootLayout.setBackgroundColor(Color.GREEN);                                  // Disable play button                 mButtonPlay.setEnabled(false);             }         });     }      // Custom method to stop media player     protected void stopPlaying(){         // If media player is not null then try to stop it         if(mPlayer!=null){             mPlayer.stop();             mPlayer.release();             mPlayer = null;             Toast.makeText(mContext,"Stop playing.",Toast.LENGTH_SHORT).show();         }     } }