Android 中用Intent提取缩略图和原始图像

提取图像的Thumbnail:

	Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
	　　intent.setType("image/*");
	　　intent.putExtra("return-data", true);
	　　startActivityForResult(intent, REQUEST_CODE_PHOTO_PICKED);
	
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (resultCode != RESULT_OK) {
		　　return;
		}
		Bitmap bitmap = null;
		ContentResolver resolver = getContentResolver();
		if (requestCode == REQUEST_CODE_PHOTO_PICKED) {
		　　final Bundle extras = data.getExtras();
		　　if (extras != null)
		　　bitmap = extras.getParcelable("data");
		}
	}
	//此方法返回的data 必须小于100k

获取原图：

Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
　　intent.setType("image/*");
　　startActivityForResult(intent, REQUEST_CODE_PHOTO_PICKED);

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
　　if (resultCode != RESULT_OK) {
		return;
　　}
　　Bitmap bitmap = null;
　　ContentResolver resolver = getContentResolver();
　　if (requestCode == REQUEST_CODE_PHOTO_PICKED) {
　　try {
	　　Uri originalUri = data.getData();
	　　Uri thumb = Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, 
			originalUri.getLastPathSegment());
	　　bitmap = MediaStore.Images.Media.getBitmap(resolver, thumb);
　　} catch (IOException e) {
　　		}
　　}
}