android - 在 fragment 中处理相机

Question

如有任何语法错误，请原谅。

我想在与 mainActivity 不同的 Activity 中使用相机。我在谷歌上找到了这个简单的教程 Taking Photos Simply ，也就是说我必须使用这个函数:

static final int REQUEST_IMAGE_CAPTURE = 1;

private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    }
}

但是，这个函数只能在 MainActivity 中正常工作，事实上，如果我将这段代码放在不同的 Activity 中，我会得到这个错误:无法解析方法“getPackageManager()”。

一些想法？

谢谢!

Answer 1

试试下面的代码:

static final int REQUEST_IMAGE_CAPTURE = 1;

Context c;
private void dispatchTakePictureIntent() {
    Fragment yourFragment = this;
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    yourFragment.startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}

覆盖父 Activity 的 onActivityResult():

 @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
}

然后将其添加到您的 fragment 中:

 @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    switch (requestCode) {
    case 1:
        if (resultCode == Activity.RESULT_OK) {
                //Do something with your captured image. EX:-
                 try {
                  Uri selectedImage = data.getData();
                  String[] filePathColumn = { MediaStore.Images.Media.DATA };
                  Cursor cursor = getActivity().getContentResolver().query(selectedImage,
            filePathColumn, null, null, null);
                  cursor.moveToFirst();
                  int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                  String picturePath = cursor.getString(columnIndex);
                  cursor.close();
                  imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath))
                } catch (FileNotFoundException e) {

                      e.printStackTrace();

                }                 
            }
        }
    }