Android:将样式应用于列表，并设置AlertDialog中显示的选定项目

Question

我在AlertDialog中显示一个列表。我想用一些风格来定制这个列表（也许是定制的）。还希望在"警报"对话框的列表中选择一个项目。我使用了非常简单的代码：

                new AlertDialog.Builder(TrainsListActivity.this).setTitle(curTrainRoute.getName() + " to " + stationNames[which])
                .setItems(timeList, new DialogInterface.OnClickListener() {         
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                })
                .show(); 

我试着搜索相同的，但找不到任何相同的资源。你能帮帮我吗。非常感谢您的帮助。

感谢

Answer 1

警报对话框的setView()方法很有用，您可以将ListView设置为对话框的自定义视图。

例如

CustomDialogListAdapter adapter = new CustomDialogListAdapter();
        ListView list = new ListView(this);
        list.setAdapter(adapter);
        list.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                setTitle("item : " + arg2);
            }
        });
        final Builder dialogBuilder = new Builder(this);
        dialogBuilder.setTitle("Custom List Dialog");
        dialogBuilder.setView(list);        
        dialogBuilder.create().show();

您可以为列表创建自定义适配器，如下所示

class CustomDialogListAdapter extends BaseAdapter {

        private String[] data = { "People Names", "Dog Names", "Cat Names", "Fish Names" };
        private ArrayList<Boolean> checkboxStatus = new ArrayList<Boolean>();
        public CustomDialogListAdapter() {
            int count = data.length;
            for (int i = 0; i < count; i++)
                checkboxStatus.add(false);
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            if(convertView == null) {
                convertView = getLayoutInflater().inflate(R.layout.raw_dialog_item, null);
                holder = new ViewHolder();
                holder.chk = (CheckBox) convertView.findViewById(R.id.chkbox);
                holder.chk.setOnCheckedChangeListener(checkboxListener);
                holder.txt = (TextView) convertView.findViewById(R.id.txtTitle);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }
            holder.chk.setTag("" + position);
            holder.chk.setChecked(checkboxStatus.get(position));
            holder.txt.setText(data[position]);
            return convertView;
        }
        class ViewHolder {
            CheckBox chk;
            TextView txt;
        }
        private OnCheckedChangeListener checkboxListener = new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                int position = Integer.parseInt(buttonView.getTag().toString());
                checkboxStatus.set(position, isChecked);
            }
        };
        @Override
        public int getCount() {
            return data.length;
        }
        @Override
        public Object getItem(int position) {
            return data[position];
        }
        @Override
        public long getItemId(int position) {
            return position;
        }
    }

列表项的原始文件（Raw_dialog_item.xml）

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:descendantFocusability="blocksDescendants" >
    <CheckBox
        android:id="@+id/chkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/txtTitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@id/chkbox"
        android:text="@string/hello_world" />
</RelativeLayout>

Answer 2

这里有一段代码，您可以使用它以简单的步骤将选择器设置为listview

AlertDialog alert = builder.create();
                                    alert.getListView().setSelector(R.drawable.listview_selector);
                                    alert.getListView().setBackgroundColor(Color.RED);
                                    alert.getListView().invalidate();
                                alert.show();