问题描述

Google 提供了这种通过意图拍照的通用代码:

Google offers this versatile code for taking photos via an intent:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // create Intent to take a picture and return control to the calling application
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name

    // start the image capture Intent
    startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}

问题是，如果您像我一样想要将照片作为附加信息传递，使用 EXTRA_OUTPUT 似乎会丢失照片数据，并使后续操作认为意图数据为空.

The problem is that if you're like me and you want to pass the photos as extras, using EXTRA_OUTPUT seemingly runs off with the photo data and makes subsequent actions think the intent data is null.

看来这是Android的一个大错误.

It appears this is a big bug with Android.

我正在尝试拍照，然后在新视图中将其显示为缩略图.我想将它保存为用户画廊中的全尺寸图像.有谁知道不使用 EXTRA_OUTPUT 来指定图像位置的方法吗?

I'm trying to take a photo then display it as a thumbnail in a new view. I'd like to have it saved as a full sized image in the user's gallery. Does anyone know a way to specify the image location without using EXTRA_OUTPUT?

这是我目前拥有的:

public void takePhoto(View view) {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
//  takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

    startActivityForResult(takePictureIntent, CAMERA_REQUEST_CODE);
}

/** Create a file Uri for saving an image or video */
private static Uri getOutputMediaFileUri(int type){
      return Uri.fromFile(getOutputMediaFile(type));
}

/** Create a File for saving an image or video */
@SuppressLint("SimpleDateFormat")
private static File getOutputMediaFile(int type){

    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
              Environment.DIRECTORY_PICTURES), "JoshuaTree");

    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            Log.d("JoshuaTree", "failed to create directory");
            return null;
        }
    }

    // Create a media file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    File mediaFile;
    if (type == MEDIA_TYPE_IMAGE){
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
        "IMG_"+ timeStamp + ".jpg");
    } else {
        return null;
    }

    return mediaFile;
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAMERA_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            handleSmallCameraPhoto(data);
        }
    }
}


private void handleSmallCameraPhoto(Intent intent) {
    Bundle extras = intent.getExtras();
    mImageBitmap = (Bitmap) extras.get("data");
    Intent displayIntent = new Intent(this, DisplayPhotoActivity.class);
    displayIntent.putExtra("BitmapImage", mImageBitmap);
    startActivity(displayIntent);
}

}

推荐答案

如果你指定了MediaStore.EXTRA_OUTPUT，那么拍摄的图像将被写入该路径，并且不会给onActivityResult任何数据.您可以从您指定的内容中读取图像.

If you specified MediaStore.EXTRA_OUTPUT, the image taken will be written to that path, and no data will given to onActivityResult. You can read the image from what you specified.

在此处查看另一个已解决的相同问题:Android 相机:数据意图返回 null

See another solved same question here: Android Camera : data intent returns null

这篇关于MediaStore.EXTRA_OUTPUT 呈现数据为空，其他保存照片的方式?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！