Android选择图片或视频进行循环播放

项目要求对本地图片或者视频进行轮播，功能实现完成后发现只是在模拟器上运行ok,后来发现是文件路径的原因。
文件uri的头部有两种一种是以file开头一种是以content开头要进行判断转化

实现如下：

视频 点击吊起文件查看：

private void setVideoPath() { 
   Intent intent = new Intent(Intent.ACTION_GET_CONTENT); 
   intent.setType("* 
   public String getDataColumn(Context context, Uri uri, String selection, 
   String[] selectionArgs) { 
 
  Cursor cursor = null; 
  final String column = "_data"; 
  final String[] projection = {column}; 
 
  try { 
      cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, 
null); 
      if (cursor != null && cursor.moveToFirst()) { 
   final int column_index = cursor.getColumnIndexOrThrow(column); 
   return cursor.getString(column_index); 
 } 
    } finally { 
      if (cursor != null) 
   cursor.close(); 
    } 
  return null; 
} 
 
 
public boolean isExternalStoragedocument(Uri uri) { 
  return "com.android.externalstorage.documents".equals(uri.getAuthority()); 
} 
 
 
public boolean isDownloadsdocument(Uri uri) { 
  return "com.android.providers.downloads.documents".equals(uri.getAuthority()); 
} 
 
 
public boolean isMediadocument(Uri uri) { 
  return "com.android.providers.media.documents".equals(uri.getAuthority()); 
} 

实现视频轮播

public class VideoActivity extends baseActivity { 
 
  @Bind(R.id.sv_ad) 
  SurfaceView vv; 
  @Bind(R.id.id_ig_back) 
  ImageView idIgBack; 
  private MediaPlayer mPlayer; 
  private String path; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
 WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.activity_video); 
    ButterKnife.bind(this); 
    verifyStoragePermissions(this); 
    init(); 
//    init2(); 
  } 
 
  private void init2() { 
    String path = SpUtils.getInstace(VideoActivity.this).getString("videoPath"); 
    Uri uri = Uri.parse("file://" + path); 
    try { 
      MediaPlayer mediaPlayer = new MediaPlayer(); 
      mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
      mediaPlayer.setDataSource(getApplicationContext(), uri); 
      mediaPlayer.prepare(); 
      mediaPlayer.start(); 
    } catch (IOException e) { 
      e.printStackTrace(); 
    } 
 
  } 
 
 
  private void init() { 
    idIgBack.setonClickListener(new View.onClickListener() { 
      @Override 
      public void onClick(View v) { 
 finish(); 
      } 
    }); 
    vv.getHolder().addCallback(new SurfaceHolder.Callback() { 
 
      @Override 
      public void surfaceDestroyed(SurfaceHolder holder) { 
 if (mPlayer != null) { 
   mPlayer.stop(); 
   mPlayer.release(); 
   mPlayer = null; 
 } 
      } 
 
      @Override 
      public void surfaceCreated(SurfaceHolder holder) { 
 
 path = SpUtils.getInstace(VideoActivity.this).getString("videoPath"); 
 
 try { 
   if (mPlayer == null) { 
     mPlayer = MediaPlayer.create(VideoActivity.this, Uri.parse("file://" + path)); 
   } 
   if(mPlayer==null){ 
     showToastReal("请在个人中心中选择正确的视频"); 
   } 
   mPlayer.setDisplay(holder);//将SurfaceHolder关联mediaplayer 
   mPlayer.setLooping(true); 
   mPlayer.start(); 
 
   mPlayer.setonErrorListener(new MediaPlayer.onErrorListener() { 
 
     @Override 
     public boolean onError(MediaPlayer mp, int what, 
   int extra) { 
// TODO Auto-generated method stub 
return false; 
     } 
   }); 
 } catch (Exception e) { 
   e.printStackTrace(); 
 } 
 
      } 
 
      @Override 
      public void surfaceChanged(SurfaceHolder holder, int format, 
      int width, int height) { 
 
      } 
    }); 
  } 
 
  public void onBack(View view) { 
    finish(); 
  } 
 
  @Override 
  public void loadNetData() { 
 
  } 
 
  private static final int REQUEST_EXTERNAL_STORAGE = 1; 
  private static String[] PERMISSIONS_STORAGE = { 
      Manifest.permission.READ_EXTERNAL_STORAGE, 
      Manifest.permission.WRITE_EXTERNAL_STORAGE 
  }; 
 
 
   
  public static void verifyStoragePermissions(Activity activity) { 
    // Check if we have write permission 
    int permission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE); 
 
 
    if (permission != PackageManager.PERMISSION_GRANTED) { 
      // We don't have permission so prompt the user 
      ActivityCompat.requestPermissions( 
   activity, 
   PERMISSIONS_STORAGE, 
   REQUEST_EXTERNAL_STORAGE 
      ); 
    } 
  } 
} 

layout的实现

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