除了我应用中的照片外，我还添加了上传视频的功能。要完成此操作，现在当您点击附加按钮b2而不是图片选择器加载时，它会加载一个警告对话框showDialog()，以便在选择时询问您要上传的内容（视频或照片），然后加载图像或视频选择器。问题是，当你从内部类调用方法doPositiveClick(Activity activity, int requestCode)时，onActivityResult没有被触发，也没有返回数据。我认为它与从内部类MyAlertDialogFragment调用它有关，但我不确定如何处理它。谢谢。
public static final int REQUEST_CODE = 0, RESULT_PHOTO = 1, RESULT_VID = 2;
void showDialog() {
DialogFragment newFragment = MyAlertDialogFragment.newInstance(
R.string.alert_dialog_two_buttons_title);
newFragment.setTargetFragment(ChatRoomFragment.this, REQUEST_CODE);
newFragment.show(getFragmentManager(), "dialog");
}
@Override
if(requestCode == REQUEST_CODE && data.getData() != null) {
Log.v("response", "Photo Selected");
Uri _uri = data.getData();
Log.v("response", "cp1/4");
代码到此为止^^^^ b2.setImageResource（R.drawable.picattached）;
if (_uri != null) {
//User has pick an image.
Cursor cursor = getActivity().getContentResolver().query(_uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
//cursor.moveToFirst();
if (cursor == null){
uploadMsgPic = _uri.getPath();
Log.i("response", "cursor == null");
Log.i("response", "uploadMsgPic now = " + uploadMsgPic);
}else{
Log.i("response", "cursor = "+ cursor);
cursor.moveToFirst();
Log.v("response", "cp2/4");
//Link to the image
//cursor.moveToFirst();
final String imageFilePath = cursor.getString(0);
Log.i("response", "imageFilePath == " + imageFilePath);
Log.v("response", "cp3/4");
uploadMsgPic = imageFilePath;
Log.v("response", "4/4");
cursor.close();
if (uploadMsgPic == null)
uploadMsgPic = _uri.getPath();
}
Log.i("response", "uploadMsgPic == " + uploadMsgPic);
media_attached=true;
}
}
if(requestCode == 6 && data != null && data.getData() != null){
Uri _uri = data.getData();
Log.v("response", "cp1/4");
b2.setImageResource(R.drawable.picattached);
if (_uri != null) {
//User has pick an image.
Cursor cursor = getActivity().getContentResolver().query(_uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
//cursor.moveToFirst();
if (cursor == null){
uploadMsgPic = _uri.getPath();
Log.i("response", "cursor == null");
Log.i("response", "uploadMsgPic now = " + uploadMsgPic);
}else{
Log.i("response", "cursor = "+ cursor);
cursor.moveToFirst();
Log.v("response", "cp2/4");
//Link to the image
//cursor.moveToFirst();
final String imageFilePath = cursor.getString(0);
Log.i("response", "imageFilePath == " + imageFilePath);
Log.v("response", "cp3/4");
uploadMsgPic = imageFilePath;
Log.v("response", "4/4");
cursor.close();
if (uploadMsgPic == null)
uploadMsgPic = _uri.getPath();
}
Log.i("response", "uploadMsgPic == " + uploadMsgPic);
media_attached=true;
}
}
super.onActivityResult(requestCode, resultCode, data);
}
//Generics:
//1. Long: Type of reference(s) passed to doInBackground()
//2. String: Type of reference passed to onProgressUpdate()
//3. STRING: Type of reference returned by doInBackground()
//Value passed to onPostExecute()
public static void doPositiveClick(Activity activity, int requestCode) {
Log.i("ChatRoomFragMent", "doPositive Clicked");
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
activity.startActivityForResult(Intent.createChooser(intent, "Select Picture"), REQUEST_CODE);
// Do stuff here.
Log.i("ChatRoomFragMent", "picture selector loaded");
}
public void doNegativeClick() {
Intent intent = new Intent();
intent.setType("video/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Video"), RESULT_VID);
// Do stuff here.
Log.i("FragmentAlertDialog", "Negative click!");
}
public static class MyAlertDialogFragment extends SherlockDialogFragment {
public static MyAlertDialogFragment newInstance(int title) {
MyAlertDialogFragment frag = new MyAlertDialogFragment();
Bundle args = new Bundle();
args.putInt("title", title);
frag.setArguments(args);
return frag;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
int title = getArguments().getInt("title");
return new AlertDialog.Builder(getActivity())
//.setIcon(R.drawable.alert_dialog_icon)
.setTitle(title)
.setPositiveButton("Photo",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) { Intent data = new Intent();
//((FragmentAlertDialogSupport)getActivity()).doPositiveClick();
ChatRoomFragment.doPositiveClick(getActivity(), 5);
getTargetFragment().onActivityResult(getTargetRequestCode(), RESULT_PHOTO, data);
}
}
)
.setNegativeButton("Video",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
//((FragmentAlertDialogSupport)getActivity()).doNegativeClick();
//doNegativeClick();
}
}
)
.create();
}
}
}
答案 0 :(得分：1)
您需要确保为对话框设置目标片段。要在显示对话框之前添加该行：
newFragment.setTargetFragment(ChatRoomFragment.this, REQUEST_CODE);
。这样做会告诉你的对话框哪个片段应该接收活动的结果。
另外，定义三个常量：
public static final int REQUEST_CODE = 0, RESULT_PHOTO = 1, RESULT_VID = 2;
现在，在你的对话框中，你应该做的事情是：
...setPositiveButton("Photo",
new DialogInterface.OnClickListener() {
public void onClick(...) {
Intent data = new Intent();
getTargetFragment().onActivityResult(getTargetRequestCode(), RESULT_PHOTO, data);
}})
.setNegativeButton(...
getTargetFragment().onActivityResult(getTargetRequestCode(), RESULT_VID, data); ...
然后在onActivityResult方法中，您需要检查请求代码和结果代码对：
if(requestCode == REQUEST_CODE && resultCode == RESULT_PHOTO) { doPositiveClick(); } ...