Android的MediaPlayer的问题:"错误(-38,0)"和"停止叫状态1 QUOT; [英] Android MediaPlayer Problems :"Error (-38 , 0) " and "stop called in state 1"
问题描述
这是没有从我的设备连仿真器的声音。
事实上,在该行的mMediaPlayer.create(这一点,musicIds [0]);,月蚀意味着我两个选择:更改访问静态使用的MediaPlayer(声明型)或添加@燮pressWarnings'静态访问关于创建()。顺便说一句,我把日食的建议........但仍然不起作用。
P.S。我从其他的项目(寻呼机)称为包。
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setTitle(R.string.diff_title);
的setContentView(R.layout.title_layout);
viewFlow =(ViewFlow)findViewById(R.id.viewflow);
DiffAdapter适配器=新DiffAdapter(本);
viewFlow.setAdapter(适配器);
TitleFlowIndicator指标=(TitleFlowIndicator)findViewById(R.id.viewflowindic);
indicator.setTitleProvider(适配器);
viewFlow.setFlowIndicator(指标);
//设置所有视图
ListView的=(的ListView)findViewById(R.id.listView1);
listView.setAdapter(新ArrayAdapter<字符串>(这一点,android.R.layout.simple_list_item_1,listeStrings));
最后ImageView的IMV =(ImageView的)findViewById(R.id.imv);
imv.setImageResource(imageIds [0]);
最后ImageView的PIC =(ImageView的)findViewById(R.id.Picture);
pic.setImageResource(imageIds [0]);
btnPlay =(的ImageButton)findViewById(R.id.btnplay);
btnPlay.setOnClickListener(本);
btnNext =(ImageView的)findViewById(R.id.imvnext);
btnLast =(ImageView的)findViewById(R.id.imvlast);
最后的TextView的TextView =(TextView中)findViewById(R.id.textView2);
textview.setText(listeStrings [0]);
搜索栏=(搜索栏)findViewById(R.id.seekbar);
//seekBar.setMax(mMediaPlayer.getDuration());
mMediaPlayer.create(此,musicIds [0]);
尝试 {
如果(mMediaPlayer!= NULL){
mMediaPlayer.stop();
}
mMediaPlayer prepare()。
mMediaPlayer.start();
}赶上(IllegalStateException异常E){
e.printStackTrace();
}赶上(IOException异常E){
e.printStackTrace();
}
listView.setOnItemClickListener(新OnItemClickListener(){
公共无效onItemClick(适配器视图<>母公司视图中查看,INT位置,长的id){
INT songIndex =位置;
字符串songTitle = musicNames [位置]
imv.setImageResource(imageIds [位置]);
pic.setImageResource(imageIds [位置]);
textview.setText(listeStrings [位置]);
}
});
}
}
这是我的logcat:
七月8号至11日:33:19.217:E / MediaPlayer的(338):停止调用状态1
7月八日日至11日:33:19.217:E / MediaPlayer的(338):错误(-38,0)
7月八日日至11日:33:19.217:E / MediaPlayer的(338):prepareAsync称为状态0
7月八日日至11日:33:19.217:W / System.err的(338):java.lang.IllegalStateException
7月八日日至11日:33:19.227:W / System.err的(338):在android.media.MediaPlayer prepare(本机方法)
7月八日日至11日:33:19.227:W / System.err的(338):在org.taptwo.android.widget.viewflow.example.DiffViewFlowExample.onCreate(DiffViewFlowExample.java:95)
7月八日日至11日:33:19.227:W / System.err的(338):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
7月八日日至11日:33:19.227:W / System.err的(338):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
7月八日日至11日:33:19.227:W / System.err的(338):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
7月八日日至11日:33:19.227:W / System.err的(338):在android.app.ActivityThread.access $ 1500(ActivityThread.java:117)
7月八日日至11日:33:19.227:W / System.err的(338):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:931)
7月八日日至11日:33:19.227:W / System.err的(338):在android.os.Handler.dispatchMessage(Handler.java:99)
7月八日日至11日:33:19.227:W / System.err的(338):在android.os.Looper.loop(Looper.java:123)
7月八日日至11日:33:19.227:W / System.err的(338):在android.app.ActivityThread.main(ActivityThread.java:3683)
7月八日日至11日:33:19.227:W / System.err的(338):在java.lang.reflect.Method.invokeNative(本机方法)
7月八日日至11日:33:19.227:W / System.err的(338):在java.lang.reflect.Method.invoke(Method.java:507)
7月八日日至11日:33:19.227:W / System.err的(338):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839)
7月八日日至11日:33:19.227:W / System.err的(338):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
7月八日日至11日:33:19.227:W / System.err的(338):在dalvik.system.NativeStart.main(本机方法)< BR>
7月八日日至11日:33:19.257:E / MediaPlayer的(338):错误(-38,0)
在 prepare()
,你需要先调用的setDataSource (..)
。
媒体框架是一个非常严格的状态机,这真的很麻烦来处理所有的不同状态。
我用这个小包装,使编码/调试变得容易一些。你可以试试看。
对于模拟器 - 注意,并非所有的文件格式,它支持
。It's no sound from my device even the emulator.
Actually, at the line "mMediaPlayer.create(this, musicIds[0]); " , eclipse suggests me two choices : "Change access to static using 'MediaPlayer'(declaring type)" or "Add @SuppressWarnings 'static-access' to on Create()". By the way, I take eclipse's suggestions........but still don't work.
P.S. I called a package from other project (pager).
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(R.string.diff_title);
setContentView(R.layout.title_layout);
viewFlow = (ViewFlow) findViewById(R.id.viewflow);
DiffAdapter adapter = new DiffAdapter(this);
viewFlow.setAdapter(adapter);
TitleFlowIndicator indicator = (TitleFlowIndicator) findViewById(R.id.viewflowindic);
indicator.setTitleProvider(adapter);
viewFlow.setFlowIndicator(indicator);
//Set all views
listView = (ListView) findViewById(R.id.listView1);
listView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, listeStrings));
final ImageView imv=(ImageView)findViewById(R.id.imv);
imv.setImageResource(imageIds[0]);
final ImageView pic = (ImageView)findViewById(R.id.Picture);
pic.setImageResource(imageIds[0]);
btnPlay = (ImageButton)findViewById(R.id.btnplay);
btnPlay.setOnClickListener(this);
btnNext = (ImageView)findViewById(R.id.imvnext);
btnLast = (ImageView)findViewById(R.id.imvlast);
final TextView textview = (TextView)findViewById(R.id.textView2);
textview.setText(listeStrings[0]);
seekBar = (SeekBar)findViewById(R.id.seekbar);
//seekBar.setMax(mMediaPlayer.getDuration());
mMediaPlayer.create(this, musicIds[0]);
try {
if (mMediaPlayer != null) {
mMediaPlayer.stop();
}
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
int songIndex = position;
String songTitle=musicNames[position];
imv.setImageResource(imageIds[position]);
pic.setImageResource(imageIds[position]);
textview.setText(listeStrings[position]);
}
});
}
}
And this is my logcat:
08-11 07:33:19.217: E/MediaPlayer(338): stop called in state 1
08-11 07:33:19.217: E/MediaPlayer(338): error (-38, 0)
08-11 07:33:19.217: E/MediaPlayer(338): prepareAsync called in state 0
08-11 07:33:19.217: W/System.err(338): java.lang.IllegalStateException
08-11 07:33:19.227: W/System.err(338): at android.media.MediaPlayer.prepare(Native Method)
08-11 07:33:19.227: W/System.err(338): at org.taptwo.android.widget.viewflow.example.DiffViewFlowExample.onCreate(DiffViewFlowExample.java:95)
08-11 07:33:19.227: W/System.err(338): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-11 07:33:19.227: W/System.err(338): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
08-11 07:33:19.227: W/System.err(338): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
08-11 07:33:19.227: W/System.err(338): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
08-11 07:33:19.227: W/System.err(338): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
08-11 07:33:19.227: W/System.err(338): at android.os.Handler.dispatchMessage(Handler.java:99)
08-11 07:33:19.227: W/System.err(338): at android.os.Looper.loop(Looper.java:123)
08-11 07:33:19.227: W/System.err(338): at android.app.ActivityThread.main(ActivityThread.java:3683)
08-11 07:33:19.227: W/System.err(338): at java.lang.reflect.Method.invokeNative(Native Method)
08-11 07:33:19.227: W/System.err(338): at java.lang.reflect.Method.invoke(Method.java:507)
08-11 07:33:19.227: W/System.err(338): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-11 07:33:19.227: W/System.err(338): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-11 07:33:19.227: W/System.err(338): at dalvik.system.NativeStart.main(Native Method)<br>
08-11 07:33:19.257: E/MediaPlayer(338): Error (-38,0)
Before prepare()
, you need first to call setDataSource(..)
.
The Media framework is a very strict state machine, and it's really cumbersome to handle all the different states.
I've used this little wrapper that makes the coding/debugging a bit easier. You can give it a try.
Regarding emulator - note that not all file formats are supported on it.
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