Question

我无法弄清楚为什么会这样。这可能是一个我无法辨认的愚蠢错误。错误再次出现：

getOutputMediaFile(int) is undefined for the type new Camera.PictureCallback(){}

我的代码：

public static final int MEDIA_TYPE_IMAGE = 1;
    private PictureCallback mPicture = new PictureCallback() {

        public void onPictureTaken(byte[] data, Camera camera) {

            File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
            try {
                FileOutputStream fos = new FileOutputStream(pictureFile);
                fos.write(data);
                fos.close();
            } catch (FileNotFoundException e) {
                //Log.d(TAG, "File not found: " + e.getMessage());
            } catch (IOException e) {
               // Log.d(TAG, "Error accessing file: " + e.getMessage());
            }
        }
    };

Answer 1

如果您因为相机示例到达此处，请向下滚动到文档中，该方法最后写入，因为视频和图像捕获都很常见 http://developer.android.com/guide/topics/media/camera.html#saving-media

Answer 2

请参阅相机Android代码

public class MainActivity extends Activity {
public static final int MEDIA_TYPE_IMAGE = 1;
private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
Uri fileUri ;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button bt=(Button)findViewById(R.id.button1);

    bt.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            final Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            fileUri=  getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
            startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

        }
    });


}
private static Uri getOutputMediaFileUri(int type){
      return Uri.fromFile(getOutputMediaFile(type));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
private static File getOutputMediaFile(int type){

    File mediaStorageDir = new File(Environment.getExternalStorageDirectory(), "MyCameraApp");

    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            Log.d("MyCameraApp", "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 == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {

        TextView tv=(TextView)findViewById(R.id.textView2);
        if (resultCode == RESULT_OK) {

            tv.setText("Image saved to:\n"+data.getData());
            ImageView img=(ImageView)findViewById(R.id.imageView1);
            img.setImageURI(fileUri);
            //tv.setText(fileUri.toString());
        } else if (resultCode == RESULT_CANCELED) {
              tv.setText("Cancelled");
        } else {
            // Image capture failed, advise user
             tv.setText("Can con be captured");
        }
    }
}
}

修改

尝试importing android.provider.MediaStore.Files.FileColumns并更改MEDIA_TYPE_IMAGE to FileColumns.MEDIA_TYPE_IMAGE。

如果您正在调用相机

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);

getOutputMediaFile（int）未定义类型new Camera.PictureCallback（）{}错误令我困惑

2 个答案: