Sound manipulation using MediaPlayer – Android dev

Another tutorial for MobileSIG – how can you manipulate an MP3 sound file to play, pause and stop. Unfortunately, I still having some problems with PAUSE. I’ll figure out letter. Basically this example may PLAY and STOP a MP3 sound file source.

This is a half day project development, sorry for any inconvenient.

The application screenshot;

What the application does – basically it has the verses in Arabic, and the recitation. Click “>” to hear the recitation, click “henti” to stop. “II” is to pause (not yet functioning). Tested on Samsung Galaxy S and HTC Wildfire only.

The project setting;

The al-Fatihah recitation is in assets (01fatihah.mp3), the images are in res/drawable-mdpi (fatihah.png is the verses in Arabic).

The User Interface (main.xml);

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:orientation="vertical" android:background="@drawable/islamicbg">
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:keepScreenOn="true" android:text="al-Fatihah (1-7)"/>
<ImageView android:layout_height="wrap_content" android:src="@drawable/fatihah" 
android:id="@+id/imageView1" android:layout_width="wrap_content"></ImageView>
<TableLayout android:layout_height="wrap_content" android:id="@+id/tableLayout1" 
    android:layout_width="fill_parent">
    <TableRow android:layout_width="fill_parent" android:id="@+id/tableRow1" android:layout_height="fill_parent" 
        android:layout_gravity="center_vertical">
        <Button android:text="   >   " android:id="@+id/btnplay" android:layout_width="wrap_content" 
            android:layout_column="0" android:layout_height="wrap_content" />
        <Button android:text="   ||   " android:id="@+id/btnpause" android:layout_width="wrap_content" 
            android:layout_column="1" android:layout_height="wrap_content" />
        <Button android:text="henti" android:id="@+id/btnstop" android:layout_width="wrap_content" 
            android:layout_column="2" android:layout_height="wrap_content" />
    </TableRow>
</TableLayout>

</LinearLayout>

The source code;

package net.kerul.alfatihah;

import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class BacaFatihahActivity extends Activity implements OnClickListener{
    
    private MediaPlayer mp;
    private Button btnplay, btnpause,btnstop;
    private Boolean reload_sound;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //flag to reload sound
        reload_sound=true;        
                
        //UIs activation
        btnplay = (Button) findViewById(R.id.btnplay);
        btnplay.setOnClickListener(this);
        btnpause = (Button) findViewById(R.id.btnpause);
        btnpause.setOnClickListener(this);
        btnpause.setEnabled(false);
        
        btnstop = (Button) findViewById(R.id.btnstop);
        btnstop.setOnClickListener(this);
        btnstop.setEnabled(false);
        
    }
    public void onClick(View v) {
            
        if (v == btnplay) {//PLAY button clicked
            if (reload_sound==true){
                reload_sound=false;
                //preparing the sound
                mp = new MediaPlayer();
                try
                {
                    AssetFileDescriptor afd = getAssets().openFd("01fatihah.mp3"); 
                    mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); 
                    mp.prepare();
                    mp.start();//play sound
                }
                catch(Exception e) {}
            }
            else{
                mp.start();//play sound
            }
            btnplay.setEnabled(false);
            btnpause.setEnabled(true);
            btnstop.setEnabled(true);
            
        }
        else if (v == btnpause) {//PAUSE button clicked
            btnplay.setEnabled(true);
            btnpause.setEnabled(false);
            btnstop.setEnabled(true);
            if(mp.isPlaying()){ 
                
                mp.pause();
            }
        }
        else if (v == btnstop) {//STOP button clicked
            btnplay.setEnabled(true);
            btnpause.setEnabled(false);
            btnstop.setEnabled(false);
            if(mp.isPlaying()){ 
                mp.stop();
                mp.release();//remove sound from memory
                reload_sound=true;
            }
        }
    }
}

The images and sound (al-Fatihah recitation) – project folder;

The APK (android installer);

*** Credit to Ustaz Don Daniyal for his help in reciting the al-Fatihah. The voice is his. Thanks for the help.