This example demonstrates how do I create a Mediaplayer class to implement a basic audio player in android app.
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"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="10dp" android:paddingRight="10dp"> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Now Playing: " android:layout_marginTop="30dp" android:textAppearance="?android:attr/textAppearanceMedium" /> <TextView android:id="@+id/txtSongName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView" android:layout_toEndOf="@+id/textView" /> <ImageButton android:id="@+id/btnBackward" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="44dp" android:layout_marginLeft="20dp" android:src="@drawable/ic_back" /> <ImageButton android:id="@+id/btnPlay" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/btnBackward" android:layout_marginLeft="20dp" android:layout_toRightOf="@+id/btnBackward" android:src="@drawable/ic_play" /> <ImageButton android:id="@+id/btnPause" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/btnPlay" android:layout_marginLeft="20dp" android:layout_toRightOf="@+id/btnPlay" android:src="@drawable/ic_pause" /> <ImageButton android:id="@+id/btnForward" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/btnPause" android:layout_marginLeft="20dp" android:layout_toRightOf="@+id/btnPause" android:contentDescription="@+id/imageButton3" android:src="@drawable/ic_forward" /> <TextView android:id="@+id/txtStartTime" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/seekBar" android:text="0 min, 0 sec" /> <SeekBar android:id="@+id/seekBar" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_above="@+id/btnBackward" android:layout_toLeftOf="@+id/txtSongTime" android:layout_toRightOf="@+id/txtStartTime" /> <TextView android:id="@+id/txtSongTime" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@+id/btnForward" android:layout_alignTop="@+id/seekBar" android:text="0 min, 0 sec " /> </RelativeLayout>
Step 3 − Add the following code to src/MainActivity.java
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.ImageButton;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import java.util.concurrent.TimeUnit;
public class MainActivity extends AppCompatActivity {
private ImageButton forwardBtn, backwardBtn, pauseBtn, playBtn;
private MediaPlayer mediaPlayer;
private TextView songName, startTime, songTime;
private SeekBar songProgress;
private static int onTime =0, playTime =0, endTime =0, forwardTime = 5000, backwardTime = 5000;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
backwardBtn = findViewById(R.id.btnBackward);
forwardBtn = findViewById(R.id.btnForward);
playBtn = findViewById(R.id.btnPlay);
pauseBtn = findViewById(R.id.btnPause);
songName = findViewById(R.id.txtSongName);
startTime = findViewById(R.id.txtStartTime);
songTime = findViewById(R.id.txtSongTime);
songName.setText("Bohemian_Rhapsody");
mediaPlayer = MediaPlayer.create(this, R.raw.bohemian_rhapsody);
songProgress = findViewById(R.id.seekBar);
songProgress.setClickable(false);
pauseBtn.setEnabled(false);
playBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Playing Audio", Toast.LENGTH_SHORT).show();
mediaPlayer.start();
endTime = mediaPlayer.getDuration();
playTime = mediaPlayer.getCurrentPosition();
if (onTime == 0) {
songProgress.setMax(endTime);
onTime = 1;
}
songTime.setText(String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes(endTime),
TimeUnit.MILLISECONDS.toSeconds(endTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(endTime))));
startTime.setText(String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes(playTime),
TimeUnit.MILLISECONDS.toSeconds(playTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(playTime))));
songProgress.setProgress(playTime);
handler.postDelayed(UpdateSongTime, 100);
pauseBtn.setEnabled(true);
playBtn.setEnabled(false);
}
});
pauseBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mediaPlayer.pause();
pauseBtn.setEnabled(false);
playBtn.setEnabled(true);
Toast.makeText(getApplicationContext(), "Pausing Audio", Toast.LENGTH_SHORT).show();
}
});
forwardBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if ((playTime + forwardTime) <= endTime) {
playTime = playTime + forwardTime;
mediaPlayer.seekTo(playTime);
} else {
Toast.makeText(getApplicationContext(), "Cannot jump forward 5 seconds", Toast.LENGTH_SHORT).show();
}
if (!playBtn.isEnabled()) {
playBtn.setEnabled(true);
}
}
});
backwardBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if ((playTime - backwardTime) > 0) {
playTime = playTime - backwardTime;
mediaPlayer.seekTo(playTime);
} else {
Toast.makeText(getApplicationContext(), "Cannot jump backward 5 seconds", Toast.LENGTH_SHORT).show();
}
if (!playBtn.isEnabled()) {
playBtn.setEnabled(true);
}
}
});
}
private Runnable UpdateSongTime = new Runnable() {
@Override
public void run() {
playTime = mediaPlayer.getCurrentPosition();
startTime.setText(String.format("%d min, %d sec",
TimeUnit.MILLISECONDS.toMinutes(playTime),
TimeUnit.MILLISECONDS.toSeconds(playTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(playTime))) );
songProgress.setProgress(playTime);
handler.postDelayed(this, 100);
}
};
}Step 4 - Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="https://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
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 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 –
