android中 MediaStore提取缩略图和原始图像

提取图像的Thumbnail

1)

    启动Intent

        Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);

        intent.setType("image/*");

        intent.putExtra("return-data", true);

        startActivityForResult(intent, REQUEST_CODE_PHOTO_PICKED);

        在 onActivityResult 中
        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");

            }

        }

        经过阅读android源代码发现，此方法返回的data 必须小于100k

2)   

        启动Intent

        Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);

        intent.setType("image/*");

        startActivityForResult(intent, REQUEST_CODE_PHOTO_PICKED);

        在 onActivityResult 中
        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) {

        }

            }

        }

提取图像原数据

        启动Intent

        Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);

        intent.setType("image/*");

        startActivityForResult(intent, REQUEST_CODE_PHOTO_PICKED);

        在 onActivityResult 中
        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();

            bitmap = MediaStore.Images.Media.getBitmap(resolver, originalUri );

        } catch (IOException e) {

        }

            }

        }