未引用JNI版本----MediaMetadataRetriever获取视频缩略图（真机4.0测试通过）

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package com.example.thumanaildemo5;import java.io.File;import java.util.HashMap;import android.annotation.SuppressLint;import android.app.Activity;import android.graphics.Bitmap;import android.media.MediaMetadataRetriever;import android.media.ThumbnailUtils;import android.os.Build;import android.os.Bundle;import android.provider.MediaStore;import android.provider.MediaStore.Images;import android.widget.ImageView;public class MainActivity extends Activity {ImageView thumbnails;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);File file = new File("/sdcard/mp4/china.mp4");thumbnails =(ImageView)findViewById(R.id.imageView1);         Bitmap bitmap = createVideoThumbnail(file.getAbsolutePath(),50,50);        if(bitmap.toString().isEmpty())        System.out.println("bitmap is null");        else{        thumbnails.setImageBitmap(bitmap);                        }          }@SuppressLint("NewApi")private Bitmap createVideoThumbnail(String url, int width, int height) {  Bitmap bitmap = null;  MediaMetadataRetriever retriever = new MediaMetadataRetriever();  int kind = MediaStore.Video.Thumbnails.MINI_KIND;  try {   if (Build.VERSION.SDK_INT >= 14) {    retriever.setDataSource(url, new HashMap<String, String>());   } else {    retriever.setDataSource(url);   }   bitmap = retriever.getFrameAtTime();  } catch (IllegalArgumentException ex) {   // Assume this is a corrupt video file  } catch (RuntimeException ex) {   // Assume this is a corrupt video file.  } finally {   try {    retriever.release();   } catch (RuntimeException ex) {    // Ignore failures while cleaning up.   }  }  if (kind == Images.Thumbnails.MICRO_KIND && bitmap != null) {   bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height,     ThumbnailUtils.OPTIONS_RECYCLE_INPUT);  }  return bitmap; }}

参考资料：Android 获取网络视频缩略图【完美兼容各版本】

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