问题
I found it's a common problem with capturing photo and receiving full size photo instead of thumbnail (according to: http://developer.android.com/training/camera/photobasics.html ). Taking photo and receiving thumbnail is easy, but rest of tutorial seems to be uncomplete and not working. Anyone resolved it in easy way?
public class TakePhoto extends Activity{
static final int REQUEST_IMAGE_CAPTURE = 1;
static final int REQUEST_TAKE_PHOTO = 1;
private String mCurrentPhotoPath;
private ImageView mImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.take_photo);
mImageView = (ImageView) findViewById(R.id.imageView);
dispatchTakePictureIntent();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
mImageView.setImageBitmap(imageBitmap);
}
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
Log.i("ASD", ex.toString());
}
// Continue only if the File was successfully created
if (photoFile != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
}
04-25 18:01:14.239 17281-17281/com.(package).bazaar E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.(package).bazaar, PID: 17281
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.(package).bazaar/com.(package).bazaar.TakePhoto}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Bundle android.content.Intent.getExtras()' on a null object reference
at android.app.ActivityThread.deliverResults(ActivityThread.java:3626)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3669)
at android.app.ActivityThread.access$1300(ActivityThread.java:148)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Bundle android.content.Intent.getExtras()' on a null object reference
at com.klangstudios.bazaar.TakePhoto.onActivityResult(TakePhoto.java:46)
at android.app.Activity.dispatchActivityResult(Activity.java:6161)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3622)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3669)
at android.app.ActivityThread.access$1300(ActivityThread.java:148)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5312)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
回答1:
I would not expect data to be null there. However, there should not be any extras on that Intent. You only look for the "data" extra if you are not specifying EXTRA_OUTPUT. If you are specifying EXTRA_OUTPUT, you go get the photo from the path that you provided in EXTRA_OUTPUT, and you ignore the Intent delivered to onActivityResult().
With regards to the null data Intent itself, that may be something peculiar to the camera app that you are using. Please bear in mind that using ACTION_IMAGE_CAPTURE means that you are relying upon a third-party app to take the picture, and third-party apps can have bugs.
回答2:
This may help: Android Camera Intent: how to get full sized photo?
Although what is doing is reading the file you create before launching camera intent, not reading data
回答3:
I struggled hours on the same problem than "jean d'arme", except that I was seeking to get URI and not Bitmap. To spare other users this waste of time, I will highlight the clarifications of "jean d'arme" and "Felipe Augusto" that helped me solved the error, with the below steps :
1) Add a global variable in your class
private Uri uri;
2) Use this variable to get the content of photoURI inside dispatchTakePictureIntent()
private void dispatchTakePictureIntent() {
{...}
if (photoFile != null) {
uri = photoURI;
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
3) Use this Uri in the onActivityResult method for whatever task you aim to
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
//Perform any task using uri
//For example set this URI to fill an ImageView like below
this.imageView.setImageURI(uri);
}
}
I hope this highlight will help some of you !
来源：https://stackoverflow.com/questions/29875478/cant-receive-intent-extras-from-camera-after-making-a-photo