我想知道为什么我的应用程序在加载和播放声音文件正好482次后崩溃了？ 在482：e点击（listview）加载并播放mp3声音文件，发生以下情况：
10-20 01:28:38.454: V/MediaPlayer(14307): decode(1018, 58494525, 47481)
10-20 01:28:40.424: I/System.out(14307): groupos i metoden getGroupId: 71
10-20 01:28:40.489: I/System.out(14307): groupos i metoden getGroupId: 71
10-20 01:28:40.489: V/SoundPoolThread(14307): Got message m=2, mData=480
10-20 01:28:40.489: V/MediaPlayer(14307): decode(1020, 58494525, 47481)
10-20 01:28:42.359: I/System.out(14307): groupos i metoden getGroupId: 71
10-20 01:28:42.424: I/System.out(14307): groupos i metoden getGroupId: 71
10-20 01:28:42.424: V/SoundPoolThread(14307): Got message m=2, mData=481
10-20 01:28:42.424: V/MediaPlayer(14307): decode(1022, 58494525, 47481)
10-20 01:28:44.244: I/System.out(14307): groupos i metoden getGroupId: 71
10-20 01:28:44.314: I/System.out(14307): groupos i metoden getGroupId: 71
10-20 01:28:44.314: V/SoundPoolThread(14307): Got message m=2, mData=482
10-20 01:28:44.314: V/MediaPlayer(14307): decode(-1, 58494525, 47481)
10-20 01:28:44.314: E/SoundPool(14307): Unable to load sample: (null)
10-20 01:28:44.324: W/SoundPool(14307): Sample was not loaded. Waiting for 30ms.
10-20 01:28:44.354: W/SoundPool(14307): Sample was not loaded. Waiting for 30ms.
10-20 01:28:44.384: W/SoundPool(14307): Sample was not loaded. Waiting for 30ms.
10-20 01:28:44.414: W/SoundPool(14307): Sample was not loaded. Waiting for 30ms.
10-20 01:28:44.444: W/SoundPool(14307): Sample was not loaded. Waiting for 30ms.
10-20 01:28:44.474: E/SoundPool(14307): sample 482 not READY
和堆栈跟踪
10-20 01:40:03.639: D/AndroidRuntime(22802): Shutting down VM
10-20 01:40:03.639: W/dalvikvm(22802): threadid=1: thread exiting with uncaught exception (group=0x40eb22a0)
10-20 01:40:03.664: E/AndroidRuntime(22802): FATAL EXCEPTION: main
10-20 01:40:03.664: E/AndroidRuntime(22802): android.content.res.Resources$NotFoundException: File res/drawable-ldpi/sam.mp3 from drawable resource ID #0x7f0203af
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.content.res.Resources.openRawResourceFd(Resources.java:994)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.media.SoundPool.load(SoundPool.java:191)
10-20 01:40:03.664: E/AndroidRuntime(22802): at com.example.thai.PhraseActivity.loadSound(PhraseActivity.java:255)
10-20 01:40:03.664: E/AndroidRuntime(22802): at com.example.thai.PhraseActivity.access$3(PhraseActivity.java:252)
10-20 01:40:03.664: E/AndroidRuntime(22802): at com.example.thai.PhraseActivity$2.onChildClick(PhraseActivity.java:130)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.widget.ExpandableListView.handleItemClick(ExpandableListView.java:590)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.widget.ExpandableListView.performItemClick(ExpandableListView.java:522)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.widget.AbsListView$PerformClick.run(AbsListView.java:3063)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.widget.AbsListView$1.run(AbsListView.java:3949)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.os.Handler.handleCallback(Handler.java:615)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.os.Handler.dispatchMessage(Handler.java:92)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.os.Looper.loop(Looper.java:137)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.app.ActivityThread.main(ActivityThread.java:4898)
10-20 01:40:03.664: E/AndroidRuntime(22802): at java.lang.reflect.Method.invokeNative(Native Method)
10-20 01:40:03.664: E/AndroidRuntime(22802): at java.lang.reflect.Method.invoke(Method.java:511)
10-20 01:40:03.664: E/AndroidRuntime(22802): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
10-20 01:40:03.664: E/AndroidRuntime(22802): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
10-20 01:40:03.664: E/AndroidRuntime(22802): at dalvik.system.NativeStart.main(Native Method)
10-20 01:40:03.664: E/AndroidRuntime(22802): Caused by: java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.content.res.AssetManager.openNonAssetFdNative(Native Method)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.content.res.AssetManager.openNonAssetFd(AssetManager.java:428)
10-20 01:40:03.664: E/AndroidRuntime(22802): at android.content.res.Resources.openRawResourceFd(Resources.java:991)
10-20 01:40:03.664: E/AndroidRuntime(22802): ... 17 more
源代码：
weakExpandableList.get().setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Object e = (Object)adapter.getChild(groupPosition, childPosition);
int nmbr_childs = adapter.getChildrenCount(groupPosition);
final int group_position = groupPosition;
// villkor för childitem.
switch (childPosition) {
case 0:
// tester huruvida ett eller två childitems. returvärdet fyller ingen funktion.
int x = (nmbr_childs > 1) ? loadAnimation_singleView(v, childPosition)
: loadAnimation_coupleView(v);
loadSound(0, group_position); // Här uppstår krasch ibland!
break;
case 1:
loadSound(1, group_position);
loadAnimation_singleView(v, childPosition);
break;
}
return true;
}
});
private void loadSound(int position, int group_position) {
switch (position) {
case 0:
myVoice = soundPool.load(PhraseActivity.wr.get(), sound[group_position][0], 2); // Här uppstår en crash ibland - resource not found exeption
soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
@Override
public void onLoadComplete(SoundPool soundPool, int sampleId,
int status) {
soundPool.play(myVoice, 1, 1, 1, 0, 1.0f);
}
});
break;
case 1:
myVoice = soundPool.load(PhraseActivity.wr.get(), sound[group_position][1], 2);
soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
@Override
public void onLoadComplete(SoundPool soundPool, int sampleId,
int status) {
soundPool.play(myVoice, 1, 1, 1, 0, 1.0f);
}
});
break;
}
}
答案 0 :(得分：1)
我最好的猜测是你没有正确使用SoundPool。这是你每次加载的MP3吗？从Soundpool javadoc可以看出，SoundPool允许您从磁盘加载音频资源，然后根据需要多次播放它们。如果你每次都在加载和播放相同的片段或几个片段，那么你做错了。