Question

点击活动A时，按钮会调用相机。我在活动B中写过相机代码。 Inshort A正在调用B将图片存储在本地文件中并返回活动A. 这是代码：

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File photo = new File(Environment.getExternalStorageDirectory() + "/X",
            filename);
Uri uri = Uri.fromFile(photo);
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(intent, ACTION_TAKE_PHOTO_B);


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == Activity.RESULT_OK
            && requestCode == ACTION_TAKE_PHOTO_B) {
        StoreByteImage(getApplicationContext(), 90);
    }
    Intent ii = new Intent(CameraActivity.this, Receipt.class);
    String count = "1";
    startActivity(ii);
}

public static boolean StoreByteImage(Context mContext, int quality) {
    // File sdImageMainDirectory = new File("/sdcard");
    File sdCard = Environment.getExternalStorageDirectory();
    File sdImageMainDirectory = new File(sdCard.getAbsolutePath() + "/X");
    FileOutputStream fileOutputStream = null;
    // String nameFile;
    try {
        byte imageData[] = null;
        imageData = FileUtils.readFileToByteArray(sdImageMainDirectory);
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = 5;
        Bitmap myImage = BitmapFactory.decodeByteArray(imageData, 0,
                imageData.length, options);
        fileOutputStream = new FileOutputStream(
                sdImageMainDirectory.toString() + filename);
        /*-
         BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream);
         myImage.compress(CompressFormat.JPEG, quality, bos);*/
        ByteArrayOutputStream bos1 = new ByteArrayOutputStream();
        myImage.compress(CompressFormat.JPEG, 60, bos1);
        byte[] data = bos1.toByteArray();
        up_image = Base64.encodeToString(data, 0);
        uploadImage(up_image, filename);
        bos1.flush();
        bos1.close();
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return true;
}

问题是startActivityForResult立即触发onActivityResult并且resultCode获得值0，其中RESULT_OK具有-1（其右边不是它）。当我读到几篇文章时，我遇到了singleInstance / singleTop确实取消了您的活动。我是Android的新手，有些人可以对此有所了解。

startActivityForResult触发onActivityResult并取消请求

0 个答案: