Android打开相册如何选择单张图片

btn8.setOnClickListener(newView.OnClickListener() {

      @Override

      publicvoidonClick(View view) {

/*在Activity Action里面有一个“ACTION_GET_CONTENT”字符串常量，

// 该常量让用户选择特定类型的数据，并返回该数据的URI.我们利用该常量，

//然后设置类型为“image/*”，就可获得Android手机内的所有image。*/

        Intent intent = new Intent();

        /* 开启Pictures画面Type设定为image */

        intent.setType("image/*");

        /* 使用Intent.ACTION_GET_CONTENT这个Action */

        intent.setAction(Intent.ACTION_GET_CONTENT);

        /* 取得相片后返回本画面 */

        startActivityForResult(intent, 1);

//Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

// startActivityForResult(intent, RESULT);

      }

    });

 @Override

  protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (resultCode == RESULT_OK) {

      Uri uri = data.getData();

      Log.e("uri", uri.toString());

      ContentResolver cr = this.getContentResolver();

      try {

        Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));

        /* 将Bitmap设定到ImageView */

        iv8.setImageBitmap(bitmap);

      }catch(FileNotFoundException e) {

        Log.e("Exception", e.getMessage(), e);

      }

    }

    super.onActivityResult(requestCode, resultCode, data);

  }