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POHow to play two or more audio clips simultaneously using MediaPlayer (android)
 

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  1. POHow to play two or more audio clips simultaneously using MediaPlayer (android)
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    <p>I and my friend are creating an android app. We almost did it... The app will play two sounds simultaneously at first run, but in the second run it will throw some errors and attains ANR state. How to fix this? Check the logcat and code below. </p> <p><strong>Code</strong></p> <pre><code>import java.io.IOException; import android.app.Activity; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity implements OnClickListener,Runnable { boolean mBound = false; Button btn1,btn2; Button btn3; Button btn4; MediaPlayer yourStereo; MediaPlayer myStereo; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn1=(Button)findViewById(R.id.a_button); btn2=(Button)findViewById(R.id.b_button); btn3=(Button)findViewById(R.id.c_button); btn4=(Button)findViewById(R.id.d_button); btn1.setOnClickListener(this); myStereo = MediaPlayer.create(this, R.raw.brb); btn3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub btn3.setVisibility(Button.GONE); btn4.setVisibility(Button.VISIBLE); // TODO Auto-generated method stub try { myStereo.prepare(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } myStereo.setLooping(true); myStereo.start(); myStereo.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { // TODO Auto-generated method stub myStereo.setLooping(true); myStereo.release(); try { myStereo.prepare(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } myStereo.start(); } }); // pause music here btn4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub myStereo.stop(); btn4.setVisibility(Button.GONE); btn3.setVisibility(Button.VISIBLE); } }); } }); } @Override public void onClick(View arg0) { // play music here btn1.setVisibility(Button.GONE); btn2.setVisibility(Button.VISIBLE); // TODO Auto-generated method stub yourStereo = MediaPlayer.create(this, R.raw.pl); yourStereo.setLooping(true); try { yourStereo.prepare(); } catch (IllegalStateException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } yourStereo.start(); yourStereo.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { // TODO Auto-generated method stub yourStereo.setLooping(true); yourStereo.release(); try { yourStereo.prepare(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } yourStereo.start(); } }); // pause music here btn2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub yourStereo.stop(); btn2.setVisibility(Button.GONE); btn1.setVisibility(Button.VISIBLE); } }); } @Override public void run() { // TODO Auto-generated method stub } } </code></pre> <p><strong>Logcat</strong></p> <pre><code>07-08 11:44:17.245: W/System.err(2659): java.lang.IllegalStateException 07-08 11:44:17.261: W/System.err(2659): at android.media.MediaPlayer.prepare(Native Method) 07-08 11:44:17.261: W/System.err(2659): at com.example.sleepsimulator.MainActivity$1.onClick(MainActivity.java:49) 07-08 11:44:17.269: W/System.err(2659): at android.view.View.performClick(View.java:2485) 07-08 11:44:17.269: W/System.err(2659): at android.view.View$PerformClick.run(View.java:9080) 07-08 11:44:17.269: W/System.err(2659): at android.os.Handler.handleCallback(Handler.java:587) 07-08 11:44:17.269: W/System.err(2659): at android.os.Handler.dispatchMessage(Handler.java:92) 07-08 11:44:17.269: W/System.err(2659): at android.os.Looper.loop(Looper.java:130) 07-08 11:44:17.269: W/System.err(2659): at android.app.ActivityThread.main(ActivityThread.java:3687) 07-08 11:44:17.269: W/System.err(2659): at java.lang.reflect.Method.invokeNative(Native Method) 07-08 11:44:17.269: W/System.err(2659): at java.lang.reflect.Method.invoke(Method.java:507) 07-08 11:44:17.269: W/System.err(2659): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 07-08 11:44:17.269: W/System.err(2659): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 07-08 11:44:17.269: W/System.err(2659): at dalvik.system.NativeStart.main(Native Method) 07-08 11:44:20.534: W/KeyCharacterMap(2659): Can't open keycharmap file 07-08 11:44:20.534: W/KeyCharacterMap(2659): Error loading keycharmap file 07-08 11:44:20.534: W/KeyCharacterMap(2659): Using default keymap 07-08 11:44:26.636: W/System.err(2659): java.io.IOException: Prepare failed.: status=0xFFFFFF8E 07-08 11:44:26.636: W/System.err(2659): at android.media.MediaPlayer.prepare(Native Method) 07-08 11:44:26.636: W/System.err(2659): at com.example.sleepsimulator.MainActivity$1.onClick(MainActivity.java:49) 07-08 11:44:26.636: W/System.err(2659): at android.view.View.performClick(View.java:2485) 07-08 11:44:26.636: W/System.err(2659): at android.view.View$PerformClick.run(View.java:9080) 07-08 11:44:26.636: W/System.err(2659): at android.os.Handler.handleCallback(Handler.java:587) 07-08 11:44:26.636: W/System.err(2659): at android.os.Handler.dispatchMessage(Handler.java:92) 07-08 11:44:26.636: W/System.err(2659): at android.os.Looper.loop(Looper.java:130) 07-08 11:44:26.636: W/System.err(2659): at android.app.ActivityThread.main(ActivityThread.java:3687) 07-08 11:44:26.636: W/System.err(2659): at java.lang.reflect.Method.invokeNative(Native Method) 07-08 11:44:26.636: W/System.err(2659): at java.lang.reflect.Method.invoke(Method.java:507) 07-08 11:44:26.636: W/System.err(2659): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 07-08 11:44:26.636: W/System.err(2659): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 07-08 11:44:26.636: W/System.err(2659): at dalvik.system.NativeStart.main(Native Method) 07-08 11:44:26.636: E/MediaPlayer(2659): start called in state 64 07-08 11:44:26.636: E/MediaPlayer(2659): error (-38, 0) 07-08 11:44:34.643: E/MediaPlayer(2659): stop called in state 0 07-08 11:44:34.643: E/MediaPlayer(2659): error (-38, 0) 07-08 11:44:34.643: E/MediaPlayer(2659): Error (-38,0) 07-08 11:44:34.651: W/System.err(2659): java.lang.IllegalStateException 07-08 11:44:34.675: W/System.err(2659): at android.media.MediaPlayer.prepare(Native Method) 07-08 11:44:34.675: W/System.err(2659): at com.example.sleepsimulator.MainActivity$1$1.onCompletion(MainActivity.java:67) 07-08 11:44:34.675: W/System.err(2659): at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:1475) 07-08 11:44:34.675: W/System.err(2659): at android.os.Handler.dispatchMessage(Handler.java:99) 07-08 11:44:34.675: W/System.err(2659): at android.os.Looper.loop(Looper.java:130) 07-08 11:44:34.675: W/System.err(2659): at android.app.ActivityThread.main(ActivityThread.java:3687) 07-08 11:44:34.675: W/System.err(2659): at java.lang.reflect.Method.invokeNative(Native Method) 07-08 11:44:34.675: W/System.err(2659): at java.lang.reflect.Method.invoke(Method.java:507) 07-08 11:44:34.675: W/System.err(2659): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 07-08 11:44:34.675: W/System.err(2659): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 07-08 11:44:34.675: W/System.err(2659): at dalvik.system.NativeStart.main(Native Method) 07-08 11:44:34.675: W/dalvikvm(2659): threadid=1: thread exiting with uncaught exception (group=0x40018578) 07-08 11:44:34.683: E/AndroidRuntime(2659): FATAL EXCEPTION: main 07-08 11:44:34.683: E/AndroidRuntime(2659): java.lang.IllegalStateException 07-08 11:44:34.683: E/AndroidRuntime(2659): at android.media.MediaPlayer._start(Native Method) 07-08 11:44:34.683: E/AndroidRuntime(2659): at android.media.MediaPlayer.start(MediaPlayer.java:950) 07-08 11:44:34.683: E/AndroidRuntime(2659): at com.example.sleepsimulator.MainActivity$1$1.onCompletion(MainActivity.java:75) 07-08 11:44:34.683: E/AndroidRuntime(2659): at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:1475) 07-08 11:44:34.683: E/AndroidRuntime(2659): at android.os.Handler.dispatchMessage(Handler.java:99) 07-08 11:44:34.683: E/AndroidRuntime(2659): at android.os.Looper.loop(Looper.java:130) 07-08 11:44:34.683: E/AndroidRuntime(2659): at android.app.ActivityThread.main(ActivityThread.java:3687) 07-08 11:44:34.683: E/AndroidRuntime(2659): at java.lang.reflect.Method.invokeNative(Native Method) 07-08 11:44:34.683: E/AndroidRuntime(2659): at java.lang.reflect.Method.invoke(Method.java:507) 07-08 11:44:34.683: E/AndroidRuntime(2659): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 07-08 11:44:34.683: E/AndroidRuntime(2659): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 07-08 11:44:34.683: E/AndroidRuntime(2659): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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