android - 选择图库中的图像时应用程序崩溃

Question

我的应用程序中的相机功能真的让我发疯!!!

我在我的应用程序中构建了相机功能，但当我尝试从图库中选择图像时它崩溃了。

Bitmap photo;
private static final int RESULT_LOAD_IMAGE = 1;
private static final int REQUEST_IMAGE_CAPTURE = 2;
ImageView imageView;

  private void activeTakePhoto() {  // if select open camera 
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    }

    private void activeGallery() { // if select choose from gallery
        Intent intent = new Intent(Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(intent, RESULT_LOAD_IMAGE);
    }

 @Override
    protected void onActivityResult(int requestCode, int resultCode,
                                    Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode) {
            case RESULT_LOAD_IMAGE:
                if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK & null != data) {
                    Uri 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 a = (BitmapFactory.decodeFile(picturePath));
                    photo = scaleBitmap(a, 200, 200);
                    imageView.setImageBitmap(photo);
                    //photo = decodeSampledBitmapFromUri(picturePath, 100, 20);
                    imageView.setImageBitmap(photo);
                }

            case REQUEST_IMAGE_CAPTURE:
                Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
                ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);

                //to generate random file name
                String fileName = "tempimg.jpg";

                try {
                    photo = (Bitmap) data.getExtras().get("data");
                    //captured image set in imageview
                    imageView.setImageBitmap(photo);
                } catch (Exception e) {
                    e.printStackTrace();
                }
        }
    }

如果我删除 activeTakePhoto()以及 case REQUEST_IMAGE_CAPTURE: 之后的所有行，选中的图片可以显示在imageView上。

如果我删除 activeGallery() ，捕获的图像可以显示在imageView上.

但是，如果我使用我在此处发布的代码 fragment (两个函数)，当我从图库中选择带有 logCat 的图像时，它会崩溃。错误

 12-10 14:49:03.507      927-927/? E/HwSystemManager﹕ :ACTION_BATTERY_CHANGED pluged =2
    12-10 14:49:07.020  19428-19428/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
        java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://media/external/images/media/832821 flg=0x1 }} to activity {com.example.project.myapplication/com.example.project.myapplication.GUI.AddMoreClaims}: java.lang.NullPointerException
                at android.app.ActivityThread.deliverResults(ActivityThread.java:3579)
            at android.app.ActivityThread.handleSendResult(ActivityThread.java:3622)
            at android.app.ActivityThread.access$1100(ActivityThread.java:169)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1436)

该行是 Bitmap thumbnail = (Bitmap) data.getExtras().get("data"); 。但是，当我选择捕获图像时，捕获的图像仍然可以显示在imageView上。 .

Answer 1

你错过了休息时间； switch case block 之间。
一旦设置了中断，您将不会遇到异常，因为在“REQUEST_IMAGE_CAPTURE”情况下不会发生失败