This code worked on samsung before but now that i'm using Nexus One with Android 2.3.6, it's crashing as soon as I take a picture and click ok or choose a photo from gallery. Stacktrace shows a null pointer exception on the Uri.
My code for the activating the camera is as follows:
public void activateCamera(View view){
Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// start the image capture Intent
startActivityForResult(i, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if ((requestCode == CHOOSE_IMAGE_ACTIVITY_REQUEST_CODE || requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE)
&& resultCode == RESULT_OK && null != data) {
selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Bitmap bits = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = inSampleSize;
try {
bits = BitmapFactory.decodeStream(new FileInputStream(picturePath),null,options);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Any idea what could be the problem? Thanks!
You have to tell the camera, where to save the picture and remeber the uri yourself:
private Uri mMakePhotoUri;
private File createImageFile() {
// return a File object for your image.
}
private void makePhoto() {
try {
File f = createImageFile();
Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
mMakePhotoUri = Uri.fromFile(f);
i.putExtra(MediaStore.EXTRA_OUTPUT, mMakePhotoUri);
startActivityForResult(i, REQUEST_MAKE_PHOTO);
} catch (IOException e) {
Log.e(TAG, "IO error", e);
Toast.makeText(getActivity(), R.string.error_writing_image, Toast.LENGTH_LONG).show();
}
}
@Override
public void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
switch (requestCode) {
case REQUEST_MAKE_PHOTO:
if (resultCode == Activity.RESULT_OK) {
// do something with mMakePhotoUri
}
return;
default: // do nothing
super.onActivityResult(requestCode, resultCode, data);
}
}
You should save the value of mMakePhotoUri
over instance states withing onCreate()
and onSaveInstanceState()
.
Inject this extra into the Intent that called onActivityResult and the system will do all the heavy lifting for you.
File f = createImageFile();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
Doing this makes it as easy as this to retrieve the photo as a bitmap.
private void handleSmallCameraPhoto(Intent intent) {
Bundle extras = intent.getExtras();
mImageBitmap = (Bitmap) extras.get("data");
mImageView.setImageBitmap(mImageBitmap);
}
dont pass any extras, just define the path where you have placed or saved the file directly in onActivityResult
public void openCamera() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
file = createImageFile();
boolean isDirectoryCreated = file.getParentFile().mkdirs();
Log.d("", "openCamera: isDirectoryCreated: " + isDirectoryCreated);
if (Build.VERSION.SDK_INT >= 23) {
tempFileUri = FileProvider.getUriForFile(getActivity().getApplicationContext(),
"com.scanlibrary.provider", // As defined in Manifest
file);
} else {
tempFileUri = Uri.fromFile(file);
}
try
{
cameraIntent.putExtra("return-data", true);
startActivityForResult(cameraIntent, ScanConstants.START_CAMERA_REQUEST_CODE);
}
catch (Exception e)
{
}
}
private File createImageFile() {
clearTempImages();
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new
Date());
File file = new File(ScanConstants.IMAGE_PATH, "IMG_" + timeStamp +
".jpg");
fileUri = Uri.fromFile(file);
return file;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Bitmap bitmap = null ;
if (resultCode == Activity.RESULT_OK ) {
try {
if (Build.VERSION.SDK_INT >= 23) {
tempFileUri = FileProvider.getUriForFile(getActivity().getApplicationContext(),
"com.scanlibrary.provider", // As defined in Manifest
file);
} else {
tempFileUri = Uri.fromFile(file);
}
bitmap = getBitmap(tempFileUri);
bitmap = getBitmap(data.getData());
} catch (Exception e) {
e.printStackTrace();
}
} else {
getActivity().finish();
}
if (bitmap != null) {
postImagePick(bitmap);
}
}
来源:https://stackoverflow.com/questions/18501439/android-camera-capture-activity-returns-null-uri