用 MediaMetadataRetriever 获取VideoView当前帧

布局

java 代码

package com.example.androidvideoview;

import android.graphics.Bitmap;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
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/sdcard0/DCIM/100MEDIA/VIDEO0009.mp4";

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  mediaMetadataRetriever = new MediaMetadataRetriever();
  mediaMetadataRetriever.setDataSource(viewSource);

  myVideoView = (VideoView) findViewById(R.id.videoview);
  myVideoView.setVideoURI(Uri.parse(viewSource));  
  myMediaController = new MediaController(this);
  myVideoView.setMediaController(myMediaController);

  myVideoView.setOnCompletionListener(myVideoViewCompletionListener);
  myVideoView.setOnPreparedListener(MyVideoViewPreparedListener);
  myVideoView.setOnErrorListener(myVideoViewErrorListener);

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

   @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();
    }
    
   }});
 }

 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;
  }
 };

}

备注： 在 AndroidManifest.xml  需要配置 minSdkVersion="10"

翻译自：http://android-er.blogspot.sg/2013/05/get-current-frame-in-videoview-using.html