未能将结果 ResultInfo{who=null, request=2, result=-1, data=Intent { }} 传送到 activity

Question

我有一种方法可以让用户选择使用相机意图拍摄照片然后上传到应用程序：

public void UploadImageToFeed() {

        CharSequence colors[] = new CharSequence[] {"Gallery", "Take a Picture"};

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Upload an Image");
        builder.setIcon(R.drawable.ic_upload_image);
        builder.setItems(colors, (dialog, which) -> {
            if (which == 0) {
                Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
                photoPickerIntent.setType("image/*");
                startActivityForResult(photoPickerIntent, SELECT_PHOTO);
            } else {
                Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                File file = new File(Environment.getExternalStorageDirectory(), "camera.jpg");
                Uri uri = Uri.fromFile(file);
                captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
                startActivityForResult(captureIntent, SELECT_PHOTO);
            }
        });
        builder.show();

    }

拍摄相机图像时，我会在实际上传之前对图像进行处理以缩小其尺寸。这是我崩溃的地方。

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
        super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

        switch (requestCode) {
            case SELECT_PHOTO:
                if (resultCode == RESULT_OK) {

                    ImageView imageToUpload = (ImageView) findViewById(R.id.imageToUpload);
                    imageToUpload.setVisibility(View.VISIBLE);

                    Uri selectedImage = imageReturnedIntent.getData();
                    InputStream imageStream = null;
                    try {
                        imageStream = getContentResolver().openInputStream(selectedImage);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                    Bitmap yourSelectedImage = BitmapFactory.decodeStream(imageStream);
                    int nh = (int) (yourSelectedImage.getHeight() * (512.0 / yourSelectedImage.getWidth()));
                    Bitmap scaled = Bitmap.createScaledBitmap(yourSelectedImage, 512, nh, true);
                    imageToUpload.setImageBitmap(scaled);

                }
        }
    }

异常：

java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { dat=content://com.google.android.apps.photos.contentprovider/-1/1/content://media/external/images/media/197149/ORIGINAL/NONE/724456777 flg=0x1 clip={text/uri-list U:content://com.google.android.apps.photos.contentprovider/-1/1/content%3A%2F%2Fmedia%2Fexternal%2Fimages%2Fmedia%2F197149/ORIGINAL/NONE/724456777} }} to activity {com.yitter.android/com.yitter.android.activity.YeetActivity}: java.lang.IllegalArgumentException: width and height must be > 0


at android.app.ActivityThread.deliverResults(ActivityThread.java:3699)
                                                                        at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742)
                                                                        at android.app.ActivityThread.-wrap16(ActivityThread.java)
                                                                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
                                                                        at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                        at android.os.Looper.loop(Looper.java:148)
                                                                        at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                        at java.lang.reflect.Method.invoke(Native Method)
                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                                     Caused by: java.lang.IllegalArgumentException: width and height must be > 0
                                                                        at android.graphics.Bitmap.createBitmap(Bitmap.java:829)
                                                                        at android.graphics.Bitmap.createBitmap(Bitmap.java:808)
                                                                        at android.graphics.Bitmap.createBitmap(Bitmap.java:739)
                                                                        at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:615)
                                                                        at com.yitter.android.activity.YeetActivity$override.onActivityResult(YeetActivity.java:350)
                                                                        at com.yitter.android.activity.YeetActivity$override.access$dispatch(YeetActivity.java)
                                                                        at com.yitter.android.activity.YeetActivity.onActivityResult(YeetActivity.java:0)
                                                                        at android.app.Activity.dispatchActivityResult(Activity.java:6456)
                                                                        at android.app.ActivityThread.deliverResults(ActivityThread.java:3695)
                                                                        at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742) 
                                                                        at android.app.ActivityThread.-wrap16(ActivityThread.java) 
                                                                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393) 
                                                                        at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                        at android.os.Looper.loop(Looper.java:148) 
                                                                        at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                                        at java.lang.reflect.Method.invoke(Native Method) 
                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

我的第一个怀疑是错误发生在我缩小相机图像的地方，但从我的堆栈跟踪中看并不是那么明显。当我删除负责重新缩放图像的两行代码时，出现以下错误：

java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent {  }} to activity {com.yitter.android/com.yitter.android.activity.YeetActivity}: java.lang.NullPointerException: uri
                                                                      at android.app.ActivityThread.deliverResults(ActivityThread.java:3699)
                                                                      at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742)
                                                                      at android.app.ActivityThread.-wrap16(ActivityThread.java)
                                                                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
                                                                      at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                      at android.os.Looper.loop(Looper.java:148)
                                                                      at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                      at java.lang.reflect.Method.invoke(Native Method)
                                                                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                                   Caused by: java.lang.NullPointerException: uri
                                                                      at com.android.internal.util.Preconditions.checkNotNull(Preconditions.java:60)
                                                                      at android.content.ContentResolver.openInputStream(ContentResolver.java:645)
                                                                      at com.yitter.android.activity.YeetActivity.onActivityResult(YeetActivity.java:366)
                                                                      at android.app.Activity.dispatchActivityResult(Activity.java:6456)
                                                                      at android.app.ActivityThread.deliverResults(ActivityThread.java:3695)
                                                                      at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742) 
                                                                      at android.app.ActivityThread.-wrap16(ActivityThread.java) 
                                                                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393) 
                                                                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                      at android.os.Looper.loop(Looper.java:148) 
                                                                      at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                                      at java.lang.reflect.Method.invoke(Native Method) 
                                                                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

可能出了什么问题？

Answer 1

ACTION_IMAGE_CAPTURE 不 return 一个 Uri。你知道图像应该在的 Uri 位置——你把它放在 EXTRA_OUTPUT 中。您需要抓住那个位置（包括通过保存的实例状态 Bundle）并查看那里。

另请注意，一旦您将 targetSdkVersion 提高到 25 或更高，Uri.fromFile() 将不适用于 Android 7.0+。

This sample app 演示使用 ACTION_IMAGE_CAPTURE，包括使用 FileProvider 来避免 Uri.fromFile().

未能将结果 ResultInfo{who=null, request=2, result=-1, data=Intent { }} 传送到 activity

Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { }} to activity

java

android

android-camera