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让我抓狂！！！

我在我的应用程序中构建了一个相机功能，但是当我尝试 select 来自图库的图像时它崩溃了。

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() 和 case REQUEST_IMAGE_CAPTURE: 之后的所有行，selected 图像可以显示在 imageView 上。

如果我删除activeGallery()，捕获的图像可以在imageView上显示。

但是，如果我使用我在此处发布的片段代码（两者都起作用），当我 select 来自画廊的图像 logCat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.access00(ActivityThread.java:169)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1436)

并且该行是 Bitmap thumbnail = (Bitmap) data.getExtras().get("data");。但是，当我select截取图像时，截取的图像仍然可以在imageView上显示。

Answer 1

你错过了休息时间；在开关盒块之间。
一旦设置了 break，你就不会得到异常，因为 case 'REQUEST_IMAGE_CAPTURE'

不会发生失败

选择图库中的图像时应用程序崩溃

App crashes when image from gallery gets selected

crash

android

image

bitmap

capture