Android:通过相机拍摄照片后无法调用 onActivityResult() 方法

Question

在我的应用程序中，当我通过以下方式调用相机 Intent 时:

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);

它不调用 onActivityResult() 方法。

我的应用程序中的问题是，有时它会调用此方法，但在拍摄照片后一段时间会再次进入照片拍摄屏幕。

在拍摄照片之前，我在 onSaveInstanceState() 中保存了大量数据，之后我通过 onRestoreInstanceState() 收集这些数据。

这里不知道为什么有的时候调用了onActivityResult()方法，有的时候进入拍照模式后这个方法没有调用。

onActivityResult() 代码:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
    String fileName = null;
    try {
        if (requestCode == CAMERA_REQUEST) {
            roughBitmap = (Bitmap) data.getExtras().get("data");
            final ContentResolver cr = getContentResolver();
            final String[] p1 = new String[] {
                MediaStore.Images.ImageColumns._ID,
                    MediaStore.Images.ImageColumns.DATE_TAKEN };
            Cursor c1 = cr.query(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, p1, null,
                        null, p1[1] + " DESC");
                if (c1.moveToFirst()) {
                    String uristringpic = "content://media/external/images/media/"
                            + c1.getInt(0);
                    newuri = Uri.parse(uristringpic);
                    // Log.i("TAG", "newuri "+newuri);
                    snapName = getRealPathFromURI(newuri);
                    Uri u = Uri.parse(snapName);

                    File f = new File("" + u);
                    fileName = f.getName();
                }
                c1.close();

                  setImageParameter();

            }
        } catch (NullPointerException e) {

        }
        System.out.println("*** End of onActivityResult() ***");
    }

public void setImageParameter() {
    // decode full image
    roughBitmap = BitmapFactory.decodeFile(snapName);
    // calc exact destination size
    Matrix matrix = new Matrix();
    RectF inRect = new RectF(0, 0, roughBitmap.getWidth(),
            roughBitmap.getHeight());
    // RectF outRect = new RectF(0, 0, dstWidth, dstHeight);
    RectF outRect = new RectF(0, 0, 640, 480);
    matrix.setRectToRect(inRect, outRect, Matrix.ScaleToFit.CENTER);
    float[] values = new float[9];
    matrix.getValues(values);
    // resize bitmap
    resizedBitmap = Bitmap.createScaledBitmap(roughBitmap,
            (int) (roughBitmap.getWidth() * values[0]),
            (int) (roughBitmap.getHeight() * values[4]), true);

    paint = new Paint();
    paint.setColor(Color.GREEN);
    paint.setTextSize(16);
    paint.setTextAlign(Paint.Align.LEFT);

    Canvas canvas = new Canvas(resizedBitmap);

    canvas.drawText(String.valueOf(lat), resizedBitmap.getWidth() - 290, resizedBitmap.getHeight() - 50, paint);
    canvas.drawText(String.valueOf(lng), resizedBitmap.getWidth() - 140, resizedBitmap.getHeight() - 50, paint);
    if (!editTextRoadName.getText().toString().equalsIgnoreCase("")) {
        canvas.drawText(editTextRoadName.getText().toString(), resizedBitmap.getWidth() - 290, resizedBitmap.getHeight() - 30, paint);
    }
    canvas.drawText(new DateClass().getSysDateTimeForPhoto(), resizedBitmap.getWidth() - 290, resizedBitmap.getHeight() - 10, paint);



    if (nFinalOrientation == 1) {
        matrix.postRotate(90);
    } else {
        matrix.postRotate(0);
    }


    rotatedBitmap = Bitmap.createScaledBitmap(resizedBitmap,
            (int) (resizedBitmap.getWidth() * values[0]),
            (int) (resizedBitmap.getHeight() * values[4]), true);

    if (booleanPhotoFlag) {
        booleanPhotoFlag = false;
        photoBitmap = rotatedBitmap.copy(Bitmap.Config.ARGB_8888, true);
        imageViewPhoto.setImageBitmap(photoBitmap);

    } else {
        landmarkBitmap = rotatedBitmap.copy(rotatedBitmap.getConfig(), rotatedBitmap.isMutable() ? true : false);
        imageViewLocationPhoto.setImageBitmap(landmarkBitmap);
    }

}

Answer 1

我创建了一个 Camera Library Project你可以用它来拍照。我建议你使用这个库来拍照

编辑 2:

试试在 protected void onActivityResult(int requestCode, int resultCode, Intent data) 和 super.onActivityResult(requestCode, resultCode, data); 之间放置一个日志看看如果甚至正在调用该方法，如果它被调用，则检查返回的值。 AND onActivityResult 不是由您的 Activity 调用，而是由调用 Activity 调用，在这种情况下是 MediaStore.ACTION_IMAGE_CAPTURE 的 intent，因此您的 onActivityResult 必须是由调用 Activity 的 setResult() 调用。但我希望你不要试图通过 Intent 传递位图 like here