[英]App crashing when trying to fetch image from gallery. Please see details
I have set up code which allows me to fetch image from gallery and show it in an ImageView
. 我已经设置了允许我从图库中获取图像并将其显示在
ImageView
。 My code worked on Android version 5.0.2, but is crashing on android versions below that. 我的代码在Android版本5.0.2上有效,但是在低于该版本的android版本上崩溃。
Here's the error I'm getting: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference at com.humanehelper.humanehelper.PostARequest.getResizedBitmap(PostARequest.java:353)
这是我得到的错误:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference at com.humanehelper.humanehelper.PostARequest.getResizedBitmap(PostARequest.java:353)
Here's PostARequest.java
file's code: 这是
PostARequest.java
文件的代码:
public class PostARequest extends Fragment {
Bitmap bitmap;
ImageView hPic;
ProgressBar progressBar;
private OnFragmentInteractionListener mListener;
public PostARequest() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_post_a_request, container, false);
progressBar = (ProgressBar) rootView.findViewById(R.id.pbHeaderProgress);
hPic = (ImageView) rootView.findViewById(R.id.h_pic);
hPic.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(getContext());
builder.setItems(R.array.choose_profile_pic_choices, mDialogListener);
android.app.AlertDialog dialog = builder.create();
dialog.show();
}
});
return rootView;
}
protected DialogInterface.OnClickListener mDialogListener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int position) {
switch (position) {
case 0: // Take picture
Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePhotoIntent, TAKE_PHOTO_REQUEST);
break;
case 1: // Choose picture
Intent choosePhotoIntent = new Intent(Intent.ACTION_GET_CONTENT);
choosePhotoIntent.setType("image/*");
startActivityForResult(choosePhotoIntent, PICK_PHOTO_REQUEST);
break;
}
}
};
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == PICK_PHOTO_REQUEST || requestCode == TAKE_PHOTO_REQUEST) {
if (data == null) {
// display an error
return;
}
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getActivity().getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
bitmap = BitmapFactory.decodeFile(picturePath);
Bitmap convertedImage = getResizedBitmap(bitmap, 200);
hPic.setImageBitmap(convertedImage);
}
} else if (resultCode == Activity.RESULT_CANCELED) {
Toast.makeText(getContext(), "Something went wrong!", Toast.LENGTH_LONG).show();
}
}
public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
int width = image.getWidth();
int height = image.getHeight();
float bitmapRatio = (float)width / (float) height;
if (bitmapRatio > 0) {
width = maxSize;
height = (int) (width / bitmapRatio);
} else {
height = maxSize;
width = (int) (height * bitmapRatio);
}
return Bitmap.createScaledBitmap(image, width, height, true);
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p/>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
I don't know what is wrong here. 我不知道这是怎么回事。
Please let me know. 请告诉我。
Please cooperate on bad format of the question, I'm still in learning phase. 请就问题的格式不好进行合作,我仍处于学习阶段。
So here is the trick .. Remove this line from your onactivity
result code And run it . 所以这是技巧。.从您的
onactivity
结果代码中删除此行并运行它。
super.onActivityResult(requestCode, resultCode, data);
This above line. 这条线以上。
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
if (requestCode == PICK_PHOTO_REQUEST || requestCode == TAKE_PHOTO_REQUEST) {
if (data == null) {
// display an error
return;
}
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getActivity().getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
bitmap = BitmapFactory.decodeFile(picturePath);
Bitmap convertedImage = getResizedBitmap(bitmap, 200);
h.setImageBitmap(convertedImage);
}
} else if (resultCode == Activity.RESULT_CANCELED) {
Toast.makeText(getContext(), "Something went wrong!", Toast.LENGTH_LONG).show();
}
}
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
// When an Image is picked
if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK
&& null != data) {
// Get the Image from data
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
// Get the cursor
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
// Move to first row
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
imgDecodableString = cursor.getString(columnIndex);
cursor.close();
ImageView imgView = (ImageView) findViewById(R.id.imgView);
// Set the Image in ImageView after decoding the String
imgView.setImageBitmap(BitmapFactory
.decodeFile(imgDecodableString));
} else {
Toast.makeText(this, "You haven't picked Image",
Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG)
.show();
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.