mediaMetadataRetriever.setDataSource（getBaseContext（），uri）拋出非法參數異常

你好開發人員我有一塊抓住視頻幀......看起來它會工作正常，除了它的一部分，我越來越違法參數異常......正如我設置視頻的路徑它crashes..Here是我的代碼崩潰在行 mediaMetadataRetriever.setDataSource（getBaseContext（），URI）下面是完整的代碼：mediaMetadataRetriever.setDataSource（getBaseContext（），uri）拋出非法參數異常

import java.io.IOException; 

import android.graphics.Bitmap; 
import android.media.MediaMetadataRetriever; 
import android.media.MediaPlayer; 
import android.net.Uri; 
import android.os.Build; 
import android.os.Bundle; 
import android.annotation.TargetApi; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.content.Context; 
import android.content.res.AssetFileDescriptor; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.MediaController; 
import android.widget.Toast; 
import android.widget.VideoView; 

public class MainActivity extends Activity { 

    MediaMetadataRetriever mediaMetadataRetriever; 
    MediaController myMediaController; 
    VideoView myVideoView; 
    String viewSource = "/storage/test.mp4"; 

    // String viewSource = "/storage/test.mp4"; 
    Uri uri = null; 

    @TargetApi(Build.VERSION_CODES.GINGERBREAD_MR1) 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     try { 
      AssetFileDescriptor afd = getAssets().openFd("test.mp4"); 
      Log.v("MA", "Before setdatasource"); 
      uri = Uri.parse("E:/test.mp4"); 
      mediaMetadataRetriever = new MediaMetadataRetriever(); 
      **mediaMetadataRetriever.setDataSource(getBaseContext(),uri);** 

      // mediaMetadataRetriever.setDataSource(afd.getFileDescriptor(), 
      // afd.getStartOffset(), afd.getLength()); 
      Log.v("MA", "After setdatasource" + afd.getStartOffset()); 
      myVideoView = (VideoView) findViewById(R.id.videoview); 
      Log.v("MA", "VIdeoview found"); 
      myVideoView.setVideoURI(Uri.parse(viewSource)); 
      Log.v("MA", "After setdatasource"); 
      myMediaController = new MediaController(this); 
      Log.v("MA", "After setdatasource"); 
      myVideoView.setMediaController(myMediaController); 
      Log.v("MA", "myMediaController initialised"); 
      myVideoView.setOnCompletionListener(myVideoViewCompletionListener); 
      Log.v("MA", "setOnCompletionListener"); 
      myVideoView.setOnPreparedListener(MyVideoViewPreparedListener); 
      Log.v("MA", "setOnPreparedListener"); 
      myVideoView.setOnErrorListener(myVideoViewErrorListener); 
      Log.v("MA", "setOnErrorListener"); 
      myVideoView.requestFocus(); 
      Log.v("MA", "focus set"); 
      myVideoView.start(); 
      Log.v("MA", "video started"); 

      Button buttonCapture = (Button) findViewById(R.id.capture); 
      buttonCapture.setOnClickListener(new OnClickListener() { 

       @TargetApi(Build.VERSION_CODES.GINGERBREAD_MR1) 
       @Override 
       public void onClick(View arg0) { 

        int currentPosition = myVideoView.getCurrentPosition(); // in 
        // millisecond 
        Toast.makeText(MainActivity.this, 
          "Current Position: " + currentPosition + " (ms)", 
          Toast.LENGTH_LONG).show(); 

        Bitmap bmFrame = mediaMetadataRetriever 
          .getFrameAtTime(currentPosition * 1000); // unit in 
        // microsecond 

        if (bmFrame == null) { 
         Toast.makeText(MainActivity.this, "bmFrame == null!", 
           Toast.LENGTH_LONG).show(); 
        } else { 
         AlertDialog.Builder myCaptureDialog = new AlertDialog.Builder(
           MainActivity.this); 
         ImageView capturedImageView = new ImageView(
           MainActivity.this); 
         capturedImageView.setImageBitmap(bmFrame); 
         LayoutParams capturedImageViewLayoutParams = new LayoutParams(
           LayoutParams.WRAP_CONTENT, 
           LayoutParams.WRAP_CONTENT); 
         capturedImageView 
           .setLayoutParams(capturedImageViewLayoutParams); 

         myCaptureDialog.setView(capturedImageView); 
         myCaptureDialog.show(); 
        } 

       } 
      }); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

    } 

    MediaPlayer.OnCompletionListener myVideoViewCompletionListener = new MediaPlayer.OnCompletionListener() { 

     @Override 
     public void onCompletion(MediaPlayer arg0) { 
      Toast.makeText(MainActivity.this, "End of Video", Toast.LENGTH_LONG) 
        .show(); 
     } 
    }; 

    MediaPlayer.OnPreparedListener MyVideoViewPreparedListener = new MediaPlayer.OnPreparedListener() { 

     @Override 
     public void onPrepared(MediaPlayer mp) { 

      long duration = myVideoView.getDuration(); // in millisecond 
      Toast.makeText(MainActivity.this, 
        "Duration: " + duration + " (ms)", Toast.LENGTH_LONG) 
        .show(); 

     } 
    }; 

    MediaPlayer.OnErrorListener myVideoViewErrorListener = new MediaPlayer.OnErrorListener() { 

     @Override 
     public boolean onError(MediaPlayer mp, int what, int extra) { 

      Toast.makeText(MainActivity.this, "Error!!!", Toast.LENGTH_LONG) 
        .show(); 
      return true; 
     } 
    }; 

}

痕跡：

E/AndroidRuntime(4317): FATAL EXCEPTION: main 

E/AndroidRuntime(4317): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.captureframe/com.example.captureframe.MainActivity}: java.lang.IllegalArgumentException 

E/AndroidRuntime(4317): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 

E/AndroidRuntime(4317): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 

E/AndroidRuntime(4317): at android.app.ActivityThread.access$600(ActivityThread.java:141) 

E/AndroidRuntime(4317): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 

E/AndroidRuntime(4317): at android.os.Handler.dispatchMessage(Handler.java:99) 

E/AndroidRuntime(4317): at android.os.Looper.loop(Looper.java:137) 

E/AndroidRuntime(4317): at android.app.ActivityThread.main(ActivityThread.java:5103) 

E/AndroidRuntime(4317): at java.lang.reflect.Method.invokeNative(Native Method) 

E/AndroidRuntime(4317): at java.lang.reflect.Method.invoke(Method.java:525) 

E/AndroidRuntime(4317): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 

E/AndroidRuntime(4317): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 

E/AndroidRuntime(4317): at dalvik.system.NativeStart.main(Native Method) 

E/AndroidRuntime(4317): Caused by: java.lang.IllegalArgumentException 

E/AndroidRuntime(4317): at android.media.MediaMetadataRetriever.setDataSource(MediaMetadataRetriever.java:165) 

E/AndroidRuntime(4317): at com.example.captureframe.MainActivity.onCreate(MainActivity.java:46) 

E/AndroidRuntime(4317): at android.app.Activity.performCreate(Activity.java:5133) 

E/AndroidRuntime(4317): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 

E/AndroidRuntime(4317): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)

任何想法將非常感激。

來源

2014-12-19 Sourav Sharma

請加上整個堆棧跟蹤。 – Jens 2014-12-19 07:59:41

@jens：堆棧跟蹤更新 – 2014-12-19 08:16:17

也許[這]（http://code.google.com/p/android/issues/detail?id=35794）幫助。 – Jens 2014-12-19 08:19:21

使用此方法。

public static Bitmap retriveVideoFrameFromVideo(String videoPath) 
       throws Throwable 
     { 
      Bitmap bitmap = null; 
      MediaMetadataRetriever mediaMetadataRetriever = null; 
      try 
      { 
       mediaMetadataRetriever = new MediaMetadataRetriever(); 
       if (Build.VERSION.SDK_INT >= 14) 
        mediaMetadataRetriever.setDataSource(videoPath, new HashMap<String, String>()); 
        else 
         mediaMetadataRetriever.setDataSource(videoPath); 
      // mediaMetadataRetriever.setDataSource(videoPath); 
       bitmap = mediaMetadataRetriever.getFrameAtTime(); 
      } 
      catch (Exception e) 
      { 
       e.printStackTrace(); 
       throw new Throwable(
         "Exception in retriveVideoFrameFromVideo(String videoPath)" 
           + e.getMessage()); 

      } 
      finally 
      { 
       if (mediaMetadataRetriever != null) 
       { 
        mediaMetadataRetriever.release(); 
       } 
      } 
      return bitmap; 
     }

來源

2015-09-21 06:50:49 KishuDroid

mediaMetadataRetriever.setDataSource（getBaseContext（），uri）拋出非法參數異常

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