Question

我遇到了一个问题，并且不知道在AlertDialog中使用一组drawable的最佳方法。当用户按下按钮并提示从可绘制列表中进行选择时，将显示AlertDialog。

目前它显示了在创建对话框时我在dialog_view布局中放置的按钮。理想情况下，我希望能够使用某种类型的列表视图，但如果不可能，我希望能够在AlertDialog内部处理项目的选择/按下。

如何处理AlertDialog中的任何操作？

DIALOGFRAGMENT

public class PicturePickerFragment extends DialogFragment {

ArrayList<Integer> imageList = new ArrayList<Integer>();

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // fill an array with selected images

    String title = "Picture";

    imageList.add(R.drawable.barbershop);
    imageList.add(R.drawable.wedding);
    imageList.add(R.drawable.meeting);
    imageList.add(R.drawable.barbershop);

    // return alertdialog
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    LayoutInflater inflater = getActivity().getLayoutInflater();

    // Inflate and set the layout for the dialog
    // Pass null as the parent view because its going in the dialog layout
    builder.setView(inflater.inflate(R.layout.dialog_view, null))
            .setTitle(R.string.event_type)
            .setPositiveButton(R.string.select_picture,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            // call the method on the parent activity when
                            // user click the positive button
                        }
                    });

    return builder.create();
}

}

对话视图

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btn_baby"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/baby"
        android:text="Baby Shower" />

    <Button
        android:id="@+id/btn_baking"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/baking"
        android:text="Baking" />

    <Button
        android:id="@+id/btn_barber"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/barbershop"
        android:text="Barbershop" />
</LinearLayout>

Answer 1

你可以使用一些ListAdapter，例如ArrayAdapter，你可以为列表中的每个项目提供一个drawable，然后在构建AlertDialog时使用适配器：

builder.setAdapter(myAdapter, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            //which is the position of the item clicked
        }
    })

编辑：这是一个适用于imageList的示例：

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setAdapter(new ArrayAdapter<Integer>(getActivity(), R.layout.dialog_image, imageList) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View view;
                if (convertView == null) {
                    LayoutInflater inflater = getActivity().getLayoutInflater();
                    view = inflater.inflate(R.layout.dialog_image, parent, false);
                } else {
                    view = convertView;
                }
                ImageView imageView = (ImageView) view.findViewById(R.id.image);
                int resId = getItem(position);
                imageView.setImageResource(resId);
                return view;
            }
        }, new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Log.i("Dialog", "selected position " + which);
            }
        });
        return builder.create();

其中R.layout.dialog_image包含一个标识为android:id="@+id/image"的ImageView作为根元素。例如：

<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/image"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:scaleType="center"
 android:paddingLeft="16dp"
 android:paddingRight="16dp"
 android:minHeight="?attr/listPreferredItemHeight" >
</ImageView>

在对话框中使用Drawables

1 个答案: