android - 当我从图库中选择图片时，在 onActivityResult 之后调用 onCreate

Question

我有覆盖了“onActivityResult”的“SherlockFragmentActivity”。

我尝试从相机和图库中获取图像并对其进行裁剪。问题是我在调用 onActivityResult 后返回了我的活动而不是片段。

...
            FragmentTransaction t = fragmentManager.beginTransaction();
            LogInFragment logFrag = new LogInFragment();
            t.replace(R.id.fragment_container, logFrag);
            t.commit();
...
     @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
        }

活动布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:id="@+id/fragment_container"
                android:background="@color/textWhite"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent">

</RelativeLayout>

而且我还有“SherlockFragment”，我在其中选择了图像：

startImagePickerDialog(this);


public void startImagePickerDialog() {
        AlertDialog.Builder myAlertDialog = new AlertDialog.Builder(getSherlockActivity());
        myAlertDialog.setTitle("Upload Pictures Option");
        myAlertDialog.setMessage("How do you want to set your picture?");

        myAlertDialog.setPositiveButton("Gallery", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface arg0, int arg1) {
                Intent intent = new Intent();
                // call android default gallery
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                // ******** code for crop image
                intent.putExtra("crop", "true");
                intent.putExtra("aspectX", 1);
                intent.putExtra("aspectY", 1);
                intent.putExtra("outputX", 200);
                intent.putExtra("outputY", 200);
                intent.putExtra("noFaceDetection", true);
                try {
                    intent.putExtra("return-data", true);
                    startActivityForResult(Intent.createChooser(intent,
                            "Complete action using"), Const.GALLERY_PICTURE);
                } catch (ActivityNotFoundException e) {
                    Log.e(LOG_TAG, "ActivityNotFoundException");
                }
            }
        });
        myAlertDialog.setNegativeButton("Camera", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface arg0, int arg1) {
                // call android default camera
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                intent.putExtra(MediaStore.EXTRA_OUTPUT,
                        MediaStore.Images.Media.EXTERNAL_CONTENT_URI.toString());
                intent.putExtra("crop", "true");
                intent.putExtra("aspectX", 1);
                intent.putExtra("aspectY", 1);
                intent.putExtra("outputX", 200);
                intent.putExtra("outputY", 200);
                intent.putExtra("noFaceDetection", true);
                try {
                    intent.putExtra("return-data", true);
                    startActivityForResult(intent, Const.CAMERA_REQUEST);
                } catch (ActivityNotFoundException e) {
                    Log.e(LOG_TAG, "ActivityNotFoundException");
                }
            }
        });
        myAlertDialog.show();
    }

和“SherlockFragment”中的“onActivityResult”：

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d(LOG_TAG, "onActivityResult");
        super.onActivityResult(requestCode, resultCode, data);

        if (resultCode != getSherlockActivity().RESULT_OK) {
            Log.e(LOG_TAG, "resultCode != RESULT_OK");
            return;
        }

        if (requestCode == Const.CAMERA_REQUEST) {
            Log.d(LOG_TAG, "requestCode == CAMERA_REQUEST");
            Bundle extras = data.getExtras();
            if (extras != null) {
                Log.d(LOG_TAG, "extras != null");
                Bitmap photo = extras.getParcelable("data");
                icon.setImageBitmap(photo);
            }
        }

        if (requestCode == Const.GALLERY_PICTURE) {
            Log.d(LOG_TAG, "requestCode == GALLERY_PICTURE");
            Bundle extras2 = data.getExtras();
            if (extras2 != null) {
                Log.d(LOG_TAG, "extras != null");
                Bitmap photo = extras2.getParcelable("data");
                icon.setImageBitmap(photo);
            }
        }
    }

更新 当我调用相机活动时，我的主要活动调用'onSaveInstanceState'，然后调用'onRestoreInstanceState'。这是一个原因吗？

Answer 1

1. 检查您的“设置”->“开发者选项”->“不保留活动”标志。
2. 如果您的设备需要内存，这就是 android 的本质，它会破坏不可见的活动。所以你必须考虑到你的活动可以随时重新创建。顺便说一句，当您的设备需要内存并破坏您的后台活动时，“不保留活动”选项可以模拟您的应用程序。

Answer 2

像这样试试

改变

Bitmap photo = extras.getParcelable("data");

至

Bitmap photo=(Bitmap) intent.getExtras().get("data");

编辑：-

@Override
        public void onActivityResult(int requestCode, int resultCode, Intent data) {
            Log.d(LOG_TAG, "onActivityResult");
            super.onActivityResult(requestCode, resultCode, data);

            if (resultCode != getSherlockActivity().RESULT_OK) {
                Log.e(LOG_TAG, "resultCode != RESULT_OK");
                return;
            }

            if (requestCode == Const.CAMERA_REQUEST) {
                Log.d(LOG_TAG, "requestCode == CAMERA_REQUEST");
                Bitmap photo=(Bitmap) intent.getExtras().get("data");// Changed Here
                icon.setImageBitmap(photo);

            }

            if (requestCode == Const.GALLERY_PICTURE) {
                Log.d(LOG_TAG, "requestCode == GALLERY_PICTURE");
               Uri imageUri= intent.getData();// Changed Here, or first decode the image to Avoid OutOfMemory Error
               icon.setImageURI(imageUri);
            }
        }

Answer 3

请更换

frag.startActivityForResult(...); 

在你的片段中

startActivityForResult(...)