Android Can';我不明白为什么总是有空值

Android Can';我不明白为什么总是有空值,android,Android,尝试制作按钮会捕获图片并将其显示在imageview中。我暂时保存该图像以获得更好的质量。摄像头不工作,但imageview上没有显示任何内容 private void dispatchTakePictureIntent() { Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); if (takePictureIntent.resolveActivity(getPackageMa

尝试制作按钮会捕获图片并将其显示在imageview中。我暂时保存该图像以获得更好的质量。摄像头不工作,但imageview上没有显示任何内容

    private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {

        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {

        }
        if (photoFile != null) {
            Uri photoURI = FileProvider.getUriForFile(this,
                    "com.example.l_sliuzas.fileprovider",
                    photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
        }
    }
}



@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_TAKE_PHOTO && requestCode == RESULT_OK)
    {
        Bitmap bitmapas = BitmapFactory.decodeFile(mCurrentPhotoPath);
        mImageView.setImageBitmap(bitmapas);
    }
}

private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
    );

    mCurrentPhotoPath = image.getAbsolutePath();
    return image;
}

这里的
REQUEST\u-TAKE\u-PHOTO
requestCode
RESULT\u-OK
resultCode
。但是在activityresult的
内部,您正在使用
requestCode
对两者进行评估。这是不正确的

所以下面的代码是不正确的

if (requestCode == REQUEST_TAKE_PHOTO && requestCode == RESULT_OK)
    {
        Bitmap bitmapas = BitmapFactory.decodeFile(mCurrentPhotoPath);
        mImageView.setImageBitmap(bitmapas);
    }
换成

if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK)
    {
        Bitmap bitmapas = BitmapFactory.decodeFile(mCurrentPhotoPath);
        mImageView.setImageBitmap(bitmapas);
    }

@ʍѳђઽ૯ท 请参阅
resultCode
@PankajKumar这是一个公共社区的朋友。我的意思是这里代码之间的区别是,它至少需要一些解释。无论如何,+1作为补充说明。@PankajKumar OP应该至少知道这些代码之间的区别。我很冷静,嘿!:)只是想让你补充更多细节,仅此而已。是的,我知道了。我知道它必须是resultCode,但由于某种原因我看不到它。万分感谢哪一个值是空的?