希望在带有 onClick 侦听器和 onLongClickListener 的警报对话框中有一个列表视图

Question

为了创建一个带有列表视图的警报对话框，我使用了以下代码：

                ArrayList<String> namesAL = dbHandler.getArrayListOFnames();
                final ListAdapter m_Adapter = new ArrayAdapter<String>(fragment_console.this,android.R.layout.simple_expandable_list_item_1, namesAL);


                builderSingle.setAdapter(
                        m_Adapter,
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {                                     
                                destloc = getLocLatLng(which);
                                destlat = destloc.latitude;
                                destlng = destloc.longitude;
                                gotoLocation(destlat, destlng, 14);
                                if (marker != null) {
                                    marker.remove();
                                }
                                if (circle != null){
                                    circle.remove();
                                    circle = null;
                                }

                                MarkerOptions options = new MarkerOptions()
                                        .title("Your destination")
                                        .position(destloc)
                                        .position(destloc)
                                        .icon(BitmapDescriptorFactory.fromResource(R.drawable.dest_marker));

                                marker = map.addMarker(options);
                                onDestinationChanged();
                                dialog.cancel();                                   }
                        });
                builderSingle.show();

但这限制了我只能使用 OnClickListener，没有长按监听选项。我也需要一个长按监听器，以便用户可以从我提供的列表中删除一个条目（实际上仅由用户创建）。如何做到这一点？

Answer 1

            // TODO Auto-generated method stub
            AlertDialog.Builder alertBuilder = new AlertDialog.Builder(
                    ListAlertDailog.this);
            alertBuilder.setIcon(R.drawable.ic_launcher);
            alertBuilder.setTitle("Select Mobile OS:-");
            final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
                    ListAlertDailog.this,
                    android.R.layout.select_dialog_item);
            arrayAdapter.add("Android");
            arrayAdapter.add("IOS");
            arrayAdapter.add("Windows");
            arrayAdapter.add("Bada");
            arrayAdapter.add("BlackBerry OS");
            arrayAdapter.add("Symbian OS");

            alertBuilder.setNegativeButton("Cancle",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            dialog.dismiss();
                        }
                    });

            alertBuilder.setAdapter(arrayAdapter,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,
                                int which) {
                            String strOS = arrayAdapter.getItem(which);
                            Toast.makeText(getApplicationContext(),
                                    "On click selected " + strOS, Toast.LENGTH_SHORT)
                                    .show();
                            dialog.dismiss();
                        }
                    });

            final AlertDialog alertDialog = alertBuilder.create();
            alertDialog.setOnShowListener(new OnShowListener() {

                @Override
                public void onShow(DialogInterface dialog) {
                    // TODO Auto-generated method stub
                    ListView listView = alertDialog.getListView(); 
                    listView.setOnItemLongClickListener(new OnItemLongClickListener() {

                        @Override
                        public boolean onItemLongClick(
                                AdapterView<?> parent, View view,
                                int position, long id) {
                            // TODO Auto-generated method stub
                            String strOS = arrayAdapter.getItem(position);
                            Toast.makeText(getApplicationContext(),
                                    "Long Press - Deleted Entry " + strOS,
                                    Toast.LENGTH_SHORT).show();
                            alertDialog.dismiss();
                            return true;
                        }
                    });
                }
            });

            alertDialog.show();

Answer 2

您需要使用 ListView 制作自己的 DialogFragment，但最好的是 RecyclerView。

例子：

public class MyDialogFragment extends DialogFragment {
    private RecyclerView mRecyclerView;
    private MyRecyclerAdapter adapter;
    // this method create view for your Dialog
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
          //inflate layout with recycler view
         View v = inflater.inflate(R.layout.fragment_dialog, container, false);
        mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        //setadapter
        CustomAdapter adapter = new MyRecyclerAdapter(context, customList);
            mRecyclerView.setAdapter(adapter);
         //get your recycler view and populate it.
         return v;
    }
}

这里你可以找到如何创建 RecyclerView 适配器，http://www.androidhive.info/2016/01/android-working-with-recycler-view/

你可以这样展示这个片段：

MyDialogFragment dialogFragment = new MyDialogFragment();
dialogFragment.show(getFragmentManager(), "dialogFragment");

Answer 3

在构建对话框之后，在​​显示它之前，你可以这样做：

alertDialog.getListView().setOnLongClickListener(...);

https://developer.android.com/reference/android/app/AlertDialog.html#getListView()

编辑：添加更多代码以澄清操作

这是添加监听器的代码。为了从列表中获取正确的对象，您应该将对象本身作为标签添加到视图中。

//[your code from above here...]

        AlertDialog alertDialog = builderSingle.create();
        alertDialog.getListView().setOnLongClickListener(new OnLongClickListener() {

            @Override
            public boolean onLongClick(View v) {
                //your removeing code here
                YourObject yObj = (YourObject) v.getTag();
                yourList.renmove(yObj);
                return true;
            }
        });
        alertDialog.show();

Answer 4

添加项目长按处理程序的简单方法

AlertDialog dialog = new Builder(mContext)
    .setTitle(HISTORY_LIST_DIALOG_TITLE)
    .setAdapter(historyAdapter, (dialog, index) -> {
       // OnItemClickListener
    })
    .create();

// Long click listener must be added after builder creation
dialog.getListView().setOnItemLongClickListener((parent, view, index, id) -> {
  // Handle item long click here
  dialog.dismiss(); // Not required, but recommended
  return true;
});

dialog.show();