更新 我发现它与帖子的主题相似，他们宣称重复。我发现它更类似于：
https://github.com/nguyenhoanglam/ImagePicker/issues/9
或
Camera is not working in Nougat 7.0
无论如何，看看这些帖子，我找不到问题的解决方案。当我在这些链接中建议更改并开始使用文件提供程序时，问题就会停止发生。但是，当我启用写入外部存储的权限时，它会再次发生。如果我没有启用此权限，则outputFileUri为null并且永远不会抛出错误。
我已经看到了类似的问题，但我还没有找到令人满意的结果来解决我面临的问题，也许我没有指出代码中的正确位置。它适用于以前的API，但不适用于API 24（Android 7.0）。我尝试了各种修改，但我总是遇到同样的问题。如果有人可以帮助我修改代码，我将不胜感激。
logcat的
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.admin.eventappb, PID: 2415
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=65736, result=-1, data=Intent { }} to activity {com.example.admin.eventappb/com.example.admin.eventappb.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.os.Bundle.get(java.lang.String)' on a null object reference
at android.app.ActivityThread.deliverResults(ActivityThread.java:4053)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4096)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1516)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.os.Bundle.get(java.lang.String)' on a null object reference
at com.example.admin.eventappb.Dialog.DCreateEvent.onActivityResult(DCreateEvent.java:336)
at android.support.v4.app.FragmentActivity.onActivityResult(FragmentActivity.java:151)
at com.example.admin.eventappb.MainActivity.onActivityResult(MainActivity.java:367)
at android.app.Activity.dispatchActivityResult(Activity.java:6915)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4049)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4096)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1516)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
代码：
public Intent getPickImageChooserIntent() {
// Determine Uri of camera image to save.
Uri outputFileUri = getCaptureImageOutputUri();
List<Intent> allIntents = new ArrayList<>();
PackageManager packageManager = getActivity().getPackageManager();
// collect all camera intents
Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
for (ResolveInfo res : listCam) {
Intent intent = new Intent(captureIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(res.activityInfo.packageName);
if (outputFileUri != null) {
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
}
allIntents.add(intent);
}
// collect all gallery intents
Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
List<ResolveInfo> listGallery = packageManager.queryIntentActivities(galleryIntent, 0);
for (ResolveInfo res : listGallery) {
Intent intent = new Intent(galleryIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(res.activityInfo.packageName);
allIntents.add(intent);
}
// the main intent is the last in the list (android) so pickup the useless one
Intent mainIntent = allIntents.get(allIntents.size() - 1);
for (Intent intent : allIntents) {
if (intent.getComponent().getClassName().equals("com.android.documentsui.DocumentsActivity")) {
mainIntent = intent;
break;
}
}
allIntents.remove(mainIntent);
// Create a chooser from the main intent
Intent chooserIntent = Intent.createChooser(mainIntent, "Select source");
// Add all other intents
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, allIntents.toArray(new Parcelable[allIntents.size()]));
return chooserIntent;
}
/**
* Get URI to image received from capture by camera.
*/
private Uri getCaptureImageOutputUri() {
Uri outputFileUri = null;
File getImage = getActivity().getExternalCacheDir();
if (getImage != null) {
outputFileUri = Uri.fromFile(new File(getImage.getPath(), "profile.png"));
}
return outputFileUri;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Bitmap bitmap;
if (resultCode == Activity.RESULT_OK) {
ImageView imageView = v.findViewById(R.id.header_cover_image);
if (getPickImageResultUri(data) != null) {
picUri = getPickImageResultUri(data);
try {
myBitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), picUri);
myBitmap = rotateImageIfRequired(myBitmap, picUri);
myBitmap = getResizedBitmap(myBitmap, 500);
CircleImageView croppedImageView = v.findViewById(R.id.user_profile_photo);
croppedImageView.setImageBitmap(myBitmap);
imageView.setImageBitmap(myBitmap);
} catch (IOException e) {
e.printStackTrace();
}
} else {
bitmap = (Bitmap) data.getExtras().get("data");
myBitmap = bitmap;
CircleImageView croppedImageView = v.findViewById(R.id.user_profile_photo);
if (croppedImageView != null) {
croppedImageView.setImageBitmap(myBitmap);
}
imageView.setImageBitmap(myBitmap);
}
}
}
public Uri getPickImageResultUri(Intent data) {
boolean isCamera = true;
if (data != null) {
String action = data.getAction();
isCamera = action != null && action.equals(MediaStore.ACTION_IMAGE_CAPTURE);
}
return isCamera ? getCaptureImageOutputUri() : data.getData();
}
private static Bitmap rotateImageIfRequired(Bitmap img, Uri selectedImage) throws IOException {
ExifInterface ei = new ExifInterface(selectedImage.getPath());
int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
return rotateImage(img, 90);
case ExifInterface.ORIENTATION_ROTATE_180:
return rotateImage(img, 180);
case ExifInterface.ORIENTATION_ROTATE_270:
return rotateImage(img, 270);
default:
return img;
}
}
private static Bitmap rotateImage(Bitmap img, int degree) {
Matrix matrix = new Matrix();
matrix.postRotate(degree);
Bitmap rotatedImg = Bitmap.createBitmap(img, 0, 0, img.getWidth(), img.getHeight(), matrix, true);
img.recycle();
return rotatedImg;
}
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);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// save file url in bundle as it will be null on scren orientation
// changes
outState.putParcelable("pic_uri", picUri);
}