显示系统中的图片
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent,SELECT_PICTURE_FROM_CAMERA);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE_FROM_FILE) {
Uri selectedImageUri = data.getData();
imageView.setImageURI(selectedImageUri);
}}

}