Can someone point me in the right direction with this? I need to get a audio file of random requests. I thought I could do this by using the AssetManager and then use string arry for a random length position. I am getting Error at OnClickMethod. Here is the code with with LogCat.
public class RandomSoundFormAssetsFolder extends Activity implements
OnClickListener {
/** Called when the activity is first created. */
MediaPlayer RandomAudioPlayer;
AssetFileDescriptor descriptor;
Button playSound;
String[] filelist;
AssetManager Agetlist;
String MediaFileL;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
Initialization();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void Initialization() throws IOException {
// TODO Auto-generated method stub
setContentView(R.layout.main);
playSound = (Button) findViewById(R.id.myButton);
playSound.setOnClickListener(this);
RandomAudioPlayer = new MediaPlayer();
Agetlist = this.getAssets();
filelist = Agetlist.list("");
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.myButton:
OnClickMethod();
break;
default:
break;
}
}
public class AudioRanActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
MediaPlayer RandomAudioPlayer;
AssetFileDescriptor descriptor;
Button playSound;
String[] filelist;
AssetManager Agetlist;
String MediaFileL;
int randomInt;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Initialization();
}
private void Initialization() {
// TODO Auto-generated method stub
setContentView(R.layout.main);
playSound = (Button) findViewById(R.id.button1);
playSound.setOnClickListener(this);
RandomAudioPlayer = new MediaPlayer();
Log.d("In Initialization Method", "Constructor For mp");
Agetlist = this.getAssets();
try {
filelist = Agetlist.list("audio");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.button1:
OnClickMethod();
break;
default:
break;
}
}
private void OnClickMethod() {
// TODO Auto-generated method stub
Random randomGenerator = new Random();
randomInt = randomGenerator.nextInt(filelist.length);
Log.i("Length: ", String.valueOf(filelist.length));
Log.i("RanInt: ", String.valueOf(randomInt));
try {
MediaFileL = filelist[randomInt];
Log.i("LengtD: ", MediaFileL);
descriptor = getAssets().openFd(MediaFileL);
RandomAudioPlayer.setDataSource(descriptor.getFileDescriptor(),
descriptor.getStartOffset(), descriptor.getLength());
descriptor.close();
RandomAudioPlayer.prepare();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
RandomAudioPlayer.start();
Log.d("In OnClickMethod", "Start mp");
}
}
}
Crash log:
05-26 17:52:51.191: W/dalvikvm(1982): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
05-26 17:52:51.282: E/AndroidRuntime(1982): FATAL EXCEPTION: main
05-26 17:52:51.282: E/AndroidRuntime(1982): java.lang.NullPointerException
05-26 17:52:51.282: E/AndroidRuntime(1982): at sound.stuff.RandomSoundFormAssetsFolder.OnClickMethod(RandomSoundFormAssetsFolder.java:68)
05-26 17:52:51.282: E/AndroidRuntime(1982): at sound.stuff.RandomSoundFormAssetsFolder.onClick(RandomSoundFormAssetsFolder.java:51)
05-26 17:52:51.282: E/AndroidRuntime(1982): at android.view.View.performClick(View.java:3511)
05-26 17:52:51.282: E/AndroidRuntime(1982): at android.view.View$PerformClick.run(View.java:14105)
05-26 17:52:51.282: E/AndroidRuntime(1982): at android.os.Handler.handleCallback(Handler.java:605)
05-26 17:52:51.282: E/AndroidRuntime(1982): at android.os.Handler.dispatchMessage(Handler.java:92)
05-26 17:52:51.282: E/AndroidRuntime(1982): at android.os.Looper.loop(Looper.java:137)
05-26 17:52:51.282: E/AndroidRuntime(1982): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-26 17:52:51.282: E/AndroidRuntime(1982): at java.lang.reflect.Method.invokeNative(Native Method)
05-26 17:52:51.282: E/AndroidRuntime(1982): at java.lang.reflect.Method.invoke(Method.java:511)
05-26 17:52:51.282: E/AndroidRuntime(1982): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-26 17:52:51.282: E/AndroidRuntime(1982): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-26 17:52:51.282: E/AndroidRuntime(1982): at dalvik.system.NativeStart.main(Native Method)
Crash log:
05-27 11:50:48.378: W/System.err(2512): java.io.FileNotFoundException: sounds
05-27 11:50:48.418: W/System.err(2512): at android.content.res.AssetManager.openAssetFd(Native Method)
05-27 11:50:48.418: W/System.err(2512): at android.content.res.AssetManager.openFd(AssetManager.java:331)
05-27 11:50:48.438: W/System.err(2512): at sound.stuff.RandomSoundFormAssetsFolder.OnClickMethod(RandomSoundFormAssetsFolder.java:69)
05-27 11:50:48.438: W/System.err(2512): at sound.stuff.RandomSoundFormAssetsFolder.onClick(RandomSoundFormAssetsFolder.java:53)
05-27 11:50:48.468: W/System.err(2512): at android.view.View.performClick(View.java:3511)
05-27 11:50:48.468: W/System.err(2512): at android.view.View.onKeyUp(View.java:6073)
05-27 11:50:48.468: W/System.err(2512): at android.widget.TextView.onKeyUp(TextView.java:5532)
05-27 11:50:48.488: W/System.err(2512): at android.view.KeyEvent.dispatch(KeyEvent.java:2575)
05-27 11:50:48.488: W/System.err(2512): at android.view.View.dispatchKeyEvent(View.java:5500)
05-27 11:50:48.498: W/System.err(2512): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
05-27 11:50:48.498: W/System.err(2512): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
05-27 11:50:48.498: W/System.err(2512): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
05-27 11:50:48.508: W/System.err(2512): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
05-27 11:50:48.518: W/System.err(2512): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1879)
05-27 11:50:48.518: W/System.err(2512): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1361)
05-27 11:50:48.518: W/System.err(2512): at android.app.Activity.dispatchKeyEvent(Activity.java:2324)
05-27 11:50:48.530: W/System.err(2512): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1806)
05-27 11:50:48.538: W/System.err(2512): at android.view.ViewRootImpl.deliverKeyEventPostIme(ViewRootImpl.java:3327)
05-27 11:50:48.538: W/System.err(2512): at android.view.ViewRootImpl.handleFinishedEvent(ViewRootImpl.java:3300)
05-27 11:50:48.558: W/System.err(2512): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2460)
05-27 11:50:48.558: W/System.err(2512): at android.os.Handler.dispatchMessage(Handler.java:99)
05-27 11:50:48.568: W/System.err(2512): at android.os.Looper.loop(Looper.java:137)
05-27 11:50:48.568: W/System.err(2512): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-27 11:50:48.578: W/System.err(2512): at java.lang.reflect.Method.invokeNative(Native Method)
05-27 11:50:48.578: W/System.err(2512): at java.lang.reflect.Method.invoke(Method.java:511)
05-27 11:50:48.588: W/System.err(2512): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-27 11:50:48.600: W/System.err(2512): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-27 11:50:48.608: W/System.err(2512): at dalvik.system.NativeStart.main(Native Method)
05-27 11:50:48.608: E/MediaPlayer(2512): start called in state 1
05-27 11:50:48.608: E/MediaPlayer(2512): error (-38, 0)
05-27 11:50:48.648: E/MediaPlayer(2512): Error (-38,0)
I have been working on trying to debug this. I have be altering my code and put in some Log-Method. String array is working I get length consistently 14 and I get random position. So that is all working. Her is the problem in the log ‘FileNotFoundException’ so the file is not loading but when I Log MediaFileL I get a audio-file name. I’m using MediaPlayer wrong or AssetFileDescriptor? Here is the code with with LogCat.
public class AudioRanActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
MediaPlayer RandomAudioPlayer;
AssetFileDescriptor descriptor;
Button playSound;
String[] filelist;
AssetManager Agetlist;
String MediaFileL;
int randomInt;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Initialization();
}
private void Initialization() {
// TODO Auto-generated method stub
setContentView(R.layout.main);
playSound = (Button) findViewById(R.id.button1);
playSound.setOnClickListener(this);
RandomAudioPlayer = new MediaPlayer();
Log.d("In Initialization method", "RandomAudioPlayer");
Agetlist = this.getAssets();
Log.d("TAGAgetlist", "Agetlist");
try {
filelist = Agetlist.list("audio");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.button1:
OnClickMethod();
break;
default:
break;
}
}
private void OnClickMethod() {
// TODO Auto-generated method stub
Random randomGenerator = new Random();
randomInt = randomGenerator.nextInt(filelist.length);
Log.i("Lengt: ", String.valueOf(filelist.length));
Log.i("RanInt: ", String.valueOf(randomInt));
try {
MediaFileL = filelist[randomInt];
Log.i("LengtD: ", MediaFileL);
descriptor = getAssets().openFd(MediaFileL);
RandomAudioPlayer.setDataSource(descriptor.getFileDescriptor(),
descriptor.getStartOffset(), descriptor.getLength());
descriptor.close();
RandomAudioPlayer.prepare();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
RandomAudioPlayer.start();
Log.d("RanPlaystart", "RandomAudio");
}
Initialization();
}
}
Log:
05-28 10:12:31.175: D/In Initialization Method(792): Constructor For mp
05-28 10:13:07.606: I/Lengt:(792): 14
05-28 10:13:07.606: I/RanInt:(792): 3
05-28 10:13:07.634: I/LengtD:(792): good_job.mp3
05-28 10:13:07.655: W/System.err(792): java.io.FileNotFoundException: good_job.mp3
05-28 10:13:07.664: W/System.err(792): at android.content.res.AssetManager.openAssetFd(Native Method)
05-28 10:13:07.664: W/System.err(792): at android.content.res.AssetManager.openFd(AssetManager.java:331)
05-28 10:13:07.675: W/System.err(792): at Audio.stuff.AudioRanActivity.OnClickMethod(AudioRanActivity.java:75)
05-28 10:13:07.675: W/System.err(792): at Audio.stuff.AudioRanActivity.onClick(AudioRanActivity.java:55)
05-28 10:13:07.684: W/System.err(792): at android.view.View.performClick(View.java:3511)
05-28 10:13:07.684: W/System.err(792): at android.view.View$PerformClick.run(View.java:14105)
05-28 10:13:07.684: W/System.err(792): at android.os.Handler.handleCallback(Handler.java:605)
05-28 10:13:07.695: W/System.err(792): at android.os.Handler.dispatchMessage(Handler.java:92)
05-28 10:13:07.704: W/System.err(792): at android.os.Looper.loop(Looper.java:137)
05-28 10:13:07.716: W/System.err(792): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-28 10:13:07.716: W/System.err(792): at java.lang.reflect.Method.invokeNative(Native Method)
05-28 10:13:07.716: W/System.err(792): at java.lang.reflect.Method.invoke(Method.java:511)
05-28 10:13:07.724: W/System.err(792): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-28 10:13:07.724: W/System.err(792): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-28 10:13:07.734: W/System.err(792): at dalvik.system.NativeStart.main(Native Method)
05-28 10:13:07.734: E/MediaPlayer(792): start called in state 1
05-28 10:13:07.734: E/MediaPlayer(792): error (-38, 0)
05-28 10:13:07.745: D/In OnClickMethod(792): Start mp
05-28 10:13:07.754: E/MediaPlayer(792): Error (-38,0)
use
because your String[] filelist; is empty.so first get all files list in filelist from assets then use in your OnClickMethod().