当我使用相机拍照后,想要在ImageView中显示这张图片时,我按照如下方法进行:
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, TAKE_PHOTO_REQUEST_FRAG);
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case PICK_IMAGE_REQUEST_FRAG:
if (resultCode == getActivity().RESULT_OK && data != null) {
Bitmap srcBmp = (Bitmap) data.getExtras().get("data");
... (process image to scale size and rotate if necesary)
pic_view.setImageBitmap(srcBmp);
}
}
}
我成功获取了图片并在ImageView中正确显示了它,但是我意识到所获得的图片质量很低。经过一些研究,我发现使用这种方法获得的图像是所拍摄图像的缩略图。因此,我根据其他SO帖子提供的指示修改了代码:
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "Pictures/timeStamp.jpg";
takenPicUri = Uri.fromFile(new File(imageFilePath));
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, takenPicUri);
startActivityForResult(intent, TAKE_PHOTO_REQUEST_FRAG);
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case PICK_IMAGE_REQUEST_FRAG:
if (resultCode == getActivity().RESULT_OK && data != null) {
Bitmap srcBmp = BitmapFactory.decodeStream(getActivity().getContentResolver().openInputStream(uri), null, null);
... (process image to scale size and rotate if necesary)
pic_view.setImageBitmap(srcBmp);
}
}
}
但是现在,图片没有在ImageView(pic_view)中显示。在其他帖子中,我读到有人报告说这种方法对他们有效,但对我来说不起作用。我是忘记了什么还是做错了什么?