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:layout_width="match_parent" android:layout_height="match_parent" android:background="#46b5ff" android:padding="16dp" android:orientation="vertical" > <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <TextView android:id="@+id/tv_pass" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/tv_duration" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" /> <TextView android:id="@+id/tv_due" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" /> <SeekBar android:id="@+id/seek_bar" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/tv_pass" /> </RelativeLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <Button android:id="@+id/btn_play" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Start" /> <Button android:id="@+id/btn_pause" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Pause" /> <Button android:id="@+id/btn_resume" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Resume" /> <Button android:id="@+id/btn_stop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Stop" /> </LinearLayout> </LinearLayout> MainActivity.java
package com.cfsuman.me.androidcodesnippets; import android.app.Activity; import android.content.Context; import android.media.MediaPlayer; import android.os.Handler; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.SeekBar; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private Context mContext; private Activity mActivity; private Button mButtonPlay; private Button mButtonStop; private Button mButtonPause; private Button mButtonResume; private SeekBar mSeekBar; private TextView mPass; private TextView mDuration; private TextView mDue; private MediaPlayer mPlayer; private Handler mHandler; private Runnable mRunnable; private int mInterval = 10; @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 mButtonPlay = findViewById(R.id.btn_play); mButtonStop = findViewById(R.id.btn_stop); mButtonPause = findViewById(R.id.btn_pause); mButtonResume = findViewById(R.id.btn_resume); mSeekBar = findViewById(R.id.seek_bar); mPass = findViewById(R.id.tv_pass); mDuration = findViewById(R.id.tv_duration); mDue = findViewById(R.id.tv_due); // Initialize the handler mHandler = new Handler(); // Initially disable the buttons mButtonStop.setEnabled(false); mButtonPause.setEnabled(false); mButtonResume.setEnabled(false); // 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.my_favorite_song); // Start the media player mPlayer.start(); Toast.makeText(mContext,"Media Player is playing.",Toast.LENGTH_SHORT).show(); // Get the current audio stats getAudioStats(); // Initialize the seek kafetaria initializeSeekBar(); // Disable the start and resume button mButtonPlay.setEnabled(false); mButtonResume.setEnabled(false); mButtonPause.setEnabled(true); mButtonStop.setEnabled(true); } }); // Set a click listener for top playing button mButtonStop.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { stopPlaying(); mButtonStop.setEnabled(false); mButtonResume.setEnabled(false); mButtonPause.setEnabled(false); mButtonPlay.setEnabled(true); } }); // Click listener for pause button mButtonPause.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if(mPlayer!=null && mPlayer.isPlaying()){ /* void pause () Pauses playback. Call start() to resume. Throws IllegalStateException : if the internal player engine has not been initialized. */ mPlayer.pause(); mButtonPause.setEnabled(false); mButtonStop.setEnabled(false); mButtonPlay.setEnabled(false); mButtonResume.setEnabled(true); mButtonPlay.setEnabled(true); } } }); // Click listener for resume button mButtonResume.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if(mPlayer!=null){ /* void seekTo (int msec) Seeks to specified time position. Same as seekTo(long, int) with mode = SEEK_PREVIOUS_SYNC. Parameters msec int : the offset in milliseconds from the start to seek to Throws IllegalStateException : if the internal player engine has not been initialized */ //mPlayer.seekTo(mPlayer.getCurrentPosition()); /* void start () Starts or resumes playback. If playback had previously been paused, playback will continue from where it was paused. If playback had been stopped, or never started before, playback will start at the beginning. Throws IllegalStateException : if it is called in an invalid state */ // Start the media player from paused position, so at this situation do not // need to call seekTo() method mPlayer.start(); mButtonResume.setEnabled(false); mButtonPause.setEnabled(true); mButtonPlay.setEnabled(true); mButtonStop.setEnabled(true); } } }); // Set a change listener for seek kafetaria mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int i, boolean b) { if(mPlayer!=null && b){ mPlayer.seekTo(i*mInterval); } } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); } 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(); if(mHandler!=null){ mHandler.removeCallbacks(mRunnable); } } } protected void getAudioStats(){ int duration = mPlayer.getDuration()/1000; // In milliseconds int due = (mPlayer.getDuration() - mPlayer.getCurrentPosition())/1000; int pass = duration - due; mPass.setText("" + pass + " seconds"); mDuration.setText("" + duration + " seconds"); mDue.setText("" + due + " seconds"); } protected void initializeSeekBar(){ mSeekBar.setMax(mPlayer.getDuration()/mInterval); mRunnable = new Runnable() { @Override public void run() { if(mPlayer!=null){ int mCurrentPosition = mPlayer.getCurrentPosition()/mInterval; // In milliseconds mSeekBar.setProgress(mCurrentPosition); getAudioStats(); } mHandler.postDelayed(mRunnable,mInterval); } }; mHandler.postDelayed(mRunnable,mInterval); } } 
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