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android camera object always a null pointer


android camera object always a null pointer

By : NewsIT
Date : November 21 2020, 01:01 AM
it should still fix some issue I will try it even without your LogCat and additional Code from your side.
For me it Looks like your recorder isn't initialized. That's why it throws a NPE at this line.
code :


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null pointer exception in android camera application

null pointer exception in android camera application


By : soheil Latifi
Date : March 29 2020, 07:55 AM
To fix the issue you can do It turns out the problem was specific to HTC devices. I resolved the problem by saving the image files in the DCIM folder on the device, but not using getContentResolver to get the path.
android camera causing null pointer exception

android camera causing null pointer exception


By : Shishir K Singhal
Date : March 29 2020, 07:55 AM
around this issue My app has null pointer exceptions when it tries to take a picture and with the camera. My app calls the camera thusly:
code :
        if (data != null) {
                File myFile;

                Uri selectedImageUri = data.getData();
                String filemanagerstring = selectedImageUri.getPath();
                String selectedImagePath = getPath(selectedImageUri);
                if (selectedImagePath != null)
                    myFile = new File(selectedImagePath);
                else if (filemanagerstring != null)
                    myFile = new File(filemanagerstring);
                 } 
public String getPath(Uri uri) {
        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        if (cursor != null) {
            int column_index = cursor
                    .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            return cursor.getString(column_index);
        } else
            return null;
    }
Android null pointer exception with camera images

Android null pointer exception with camera images


By : user2783320
Date : March 29 2020, 07:55 AM
may help you . i am trying to launch the camera and capture the image file in the inactivity result then save it in a file.. but i keep getting a java.lang.NullPointerException at the getContentResolver.notifyChange line. , Call for camera activity using below code:
code :
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    File f = new File(android.os.Environment
                            .getExternalStorageDirectory(), "temp.jpg");
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
                    startActivityForResult(intent, REQUEST_CAMERA);
if (resultCode == RESULT_OK) {
            if (requestCode == REQUEST_CAMERA) {
                File f = new File(Environment.getExternalStorageDirectory()
                        .toString());
                for (File temp : f.listFiles()) {
                    if (temp.getName().equals("temp.jpg")) {
                        f = temp;
                        break;
                    }
                }
                try {
                    Bitmap bm;
                    BitmapFactory.Options btmapOptions = new BitmapFactory.Options();
                    imageView = (ImageView )findViewById(R.id.take_photo_image_view);
                    bm = BitmapFactory.decodeFile(f.getAbsolutePath(),
                            btmapOptions);
 
                    // bm = Bitmap.createScaledBitmap(bm, 70, 70, true);
                    imageView.setImageBitmap(bm);
 
                    String path = android.os.Environment
                            .getExternalStorageDirectory()
                            + File.separator
                            + "Phoenix" + File.separator + "default";
                    f.delete();
                    OutputStream fOut = null;
                    File file = new File(path, String.valueOf(System
                            .currentTimeMillis()) + ".jpg");
                    try {
                        fOut = new FileOutputStream(file);
                        bm.compress(Bitmap.CompressFormat.JPEG, 85, fOut);
                        fOut.flush();
                        fOut.close();
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
Camera object is a null pointer

Camera object is a null pointer


By : scott.monk
Date : March 29 2020, 07:55 AM
it helps some times I Obtained the following code from various tutorials which I am unable to execute, Could someone please help me rectify the mistakes? I tried to debug the app to check why the camera object is returning null but could not understand, in advance , In your Video.java in the Initialize method you do this:
code :
mPreview = new Camera_Preview(myContext, mCamera);
Android Camera - Attempt to read from field 'int android.hardware.Camera$Size.width' on a null object reference

Android Camera - Attempt to read from field 'int android.hardware.Camera$Size.width' on a null object reference


By : Preethi
Date : March 29 2020, 07:55 AM
Hope that helps I am developing an android application. I use a custom camera in a Fragment of a ViewPager. I have a problem of compatibility, my app works on android 4.2.2 , 4.4.4, 5.0.1 . But if i try with an android version 5.1.0 or 5.1.1 , the app crash . I have this log : , Permissions changed recently.
Use this in the onCreate():
code :
String[] permissions = {"android.permission.CAMERA"};
int permissionRequestCode = 200;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(permissions[0]) != PackageManager.PERMISSION_GRANTED)
    {
        requestPermissions(permissions, permissionRequestCode);
    }
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 200: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //Permission Granted
            } else {
                //Permission Denied
            }
            return;
        //Use other case lines for other requests (with different requestCodes)
        }
    }
}
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