Android MediaRecorder拋出IllegalStateException

我想開發一個簡單的android錄像機。爲此我創建了一個自定義SurfaceView與MediaRecoder來處理錄音。一切都很好，它也可以在Android設備上正常運行。但是當我打電話給startRecording()時，它給我IllegalStateException。下面是代碼：Android MediaRecorder拋出IllegalStateException

package my.android.video; 

import android.media.MediaRecorder; 
import android.view.SurfaceView; 
import android.view.SurfaceHolder; 
import android.util.Log; 
import java.lang.IllegalArgumentException; 
import java.lang.IllegalStateException; 
import java.io.IOException; 
import android.content.Context; 


public class RecorderView extends SurfaceView implements SurfaceHolder.Callback { 
    private MediaRecorder mediaRecorder; 


public RecorderView(Context context) 
{ 
    super(context); 
    SurfaceHolder holder = getHolder(); 
    holder.addCallback(this); 
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    holder.setFixedSize(400, 300); 


} 

@Override 
public void surfaceCreated(SurfaceHolder holder) { 


if (mediaRecorder == null) { 
    try { 
      mediaRecorder=new MediaRecorder(); 
      mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
      mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 
      mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); 
      mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); 
      mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT); 
      mediaRecorder.setOutputFile("/sdcard/myoutputfile.mp4"); 
      mediaRecorder.setPreviewDisplay(holder.getSurface()); 
      mediaRecorder.prepare(); 
     } catch (IllegalArgumentException e) { 
      Log.d("MEDIA_PLAYER", e.getMessage()); 
     } catch (IllegalStateException e) { 
      Log.d("MEDIA_PLAYER", e.getMessage()); 
     } catch (IOException e) { 
      Log.d("MEDIA_PLAYER", e.getMessage()); 
     } 
    } 
} 

@Override 
public void surfaceDestroyed(SurfaceHolder holder) { 
    mediaRecorder.release(); 
} 

    @Override 
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { 
    // TODO 
} 

public void startRecording() 
{ 
    mediaRecorder.start(); 
} 

public void stopRecording() 
{ 
    mediaRecorder.stop(); 
    } 
}

編輯

logcat的輸出

I/ActivityManager( 107): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=my.android.video/.VideoRecorder } 
I/ActivityManager( 107): Start proc my.android.video for activity my.android.video/.VideoRecorder: pid=1534 uid=10098 gids={1015} 
I/WindowManager( 107): Setting rotation to 1, animFlags=1 
I/ActivityManager( 107): Config changed: { scale=1.0 imsi=310/120 loc=en_US touch=3 keys=1/1/2 nav=1/1 orien=2 layout=34 uiMode=17 seq=18} 
W/InputManagerService( 107): Ignoring hideSoftInput of: [email protected] 
I/WindowManager( 107): Setting rotation to 0, animFlags=0 
I/ActivityManager( 107): Config changed: { scale=1.0 imsi=310/120 loc=en_US touch=3 keys=1/1/2 nav=1/1 orien=1 layout=34 uiMode=17 seq=19} 
I/UsageStats( 107): Unexpected resume of my.android.video while already resumed in my.android.video 
I/WindowManager( 107): Setting rotation to 1, animFlags=0 
I/ActivityManager( 107): Config changed: { scale=1.0 imsi=310/120 loc=en_US touch=3 keys=1/1/2 nav=1/1 orien=2 layout=34 uiMode=17 seq=20} 
I/UsageStats( 107): Unexpected resume of my.android.video while already resumed in my.android.video 
E/AndroidRuntime(1534): FATAL EXCEPTION: main 
E/AndroidRuntime(1534): java.lang.IllegalStateException 
E/AndroidRuntime(1534):  at android.media.MediaRecorder.start(Native Method) 
E/AndroidRuntime(1534):  at my.android.video.RecorderView.startRecording(RecorderView.java:62) 
E/AndroidRuntime(1534):  at my.android.video.VideoRecorder$1.onClick(VideoRecorder.java:40) 
E/AndroidRuntime(1534):  at android.view.View.performClick(View.java:2408) 
E/AndroidRuntime(1534):  at android.view.View$PerformClick.run(View.java:8817) 
E/AndroidRuntime(1534):  at android.os.Handler.handleCallback(Handler.java:587) 
E/AndroidRuntime(1534):  at android.os.Handler.dispatchMessage(Handler.java:92) 
E/AndroidRuntime(1534):  at android.os.Looper.loop(Looper.java:144) 
E/AndroidRuntime(1534):  at android.app.ActivityThread.main(ActivityThread.java:4937) 
E/AndroidRuntime(1534):  at java.lang.reflect.Method.invokeNative(Native Method) 
E/AndroidRuntime(1534):  at java.lang.reflect.Method.invoke(Method.java:521) 
E/AndroidRuntime(1534):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
E/AndroidRuntime(1534):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
E/AndroidRuntime(1534):  at dalvik.system.NativeStart.main(Native Method) 
W/ActivityManager( 107): Force finishing activity my.android.video/.VideoRecorder 
W/ActivityManager( 107): Activity pause timeout for HistoryRecord{462016f0 my.android.video/.VideoRecorder} 
I/WindowManager( 107): Setting rotation to 0, animFlags=1 
I/ActivityManager( 107): Config changed: { scale=1.0 imsi=310/120 loc=en_US touch=3 keys=1/1/2 nav=1/1 orien=1 layout=34 uiMode=17 seq=21} 
D/PendingIntent( 236): PendingIntent getBroadcast Intent String =com.htc.htccalendarwidgets.MyWidgetView4110120 
D/PendingIntent( 236): PendingIntent getBroadcast returnPendingIntent packageName =com.htc.launcher 
V/AlarmManager( 107): Adding Alarm{4614d4d0 type 0 com.htc.launcher} Feb 24 12:00:00 am 
I/WindowManager( 107): WIN DEATH: Window{462ec3b0 my.android.video/my.android.video.VideoRecorder paused=false} 
I/ActivityManager( 107): Process my.android.video (pid 1534) has died. 
W/ActivityManager( 107): Activity destroy timeout for HistoryRecord{462016f0 my.android.video/.VideoRecorder}

我無法弄清楚這個問題，因爲我是新來的Android編程。

來源

2011-02-23 Vinod Maurya

你能告訴我們你的logcat嗎？ – prolink007

看起來你是在我打電話準備之前打電話給我的。 –

不，我打電話後準備開始。 –

問題可能與您傳遞給預覽表面的參數有關。在該行中：

holder.setFixedSize(400,300)

嘗試傳遞其他參數，例如：（320,240）

另外，在調用setPreviewSurface之前，請確保可以訪問預覽表面。

來源

2012-10-16 06:56:05

Android MediaRecorder拋出IllegalStateException

回答

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