有时候我们需要制作自定义的单选列表,但是会遇到一些问题,比如多选,假选问题,所以网上找了找资料,整理一个demo出来,贴一下代码:
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" >
</ListView>
列表中每行的内容
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/outpatient_check_hospital"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5.0dip"
android:layout_marginLeft="12.599976dip"
android:layout_marginRight="12.599976dip"
android:layout_marginTop="5.0dip"
android:gravity="center_vertical"
android:background="#AAAAAA">
<LinearLayout
android:id="@+id/linear_layout_up"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10.0dip"
android:gravity="center"
android:orientation="horizontal" >
<ImageView
android:layout_width="10dip"
android:layout_height="10dip"
android:adjustViewBounds="false" />
<TextView
android:id="@+id/tv_device_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2.0"
android:text="名称"
android:textColor="#ff323232"
android:textSize="16.0sp"
android:typeface="monospace" />
<RadioButton
android:id="@+id/rb_light"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:text="" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
使用列表的页面
public class MainActivity extends Activity {
private ListView listView;
private ListViewAdapter adapter;
private String[] beans = new String[] { "1", "2", "3", "4", "5", "6", "7",
"8", "9", "10", "11", "12", "13" };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
// TODO Auto-generated method stub
Log.i("htp", "beans.size:" + beans.length);
listView = (ListView) findViewById(R.id.listView1);
adapter = new ListViewAdapter(MainActivity.this, beans);
listView.setAdapter(adapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}
适配器内容,在这里面处理如何单选问题
package com.example.listviewdemo; import java.util.HashMap; import java.util.List; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.RadioButton; import android.widget.TextView; public class ListViewAdapter extends BaseAdapter { private Context context; private String[] beans; // 用于记录每个RadioButton的状态,并保证只可选一个 HashMap<String, Boolean> states = new HashMap<String, Boolean>(); class ViewHolder { TextView tvName; RadioButton rb_state; } public ListViewAdapter(Context context, String[] beans) { // TODO Auto-generated constructor stub this.beans = beans; this.context = context; } @Override public int getCount() { // TODO Auto-generated method stub return beans.length; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return beans[position]; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub // 页面 ViewHolder holder; String bean = beans[position]; LayoutInflater inflater = LayoutInflater.from(context); if (convertView == null) { convertView = inflater.inflate( R.layout.assist_device_binding_list_item, null); holder = new ViewHolder(); // holder.rb_state = (RadioButton) convertView // .findViewById(R.id.rb_light); holder.tvName = (TextView) convertView .findViewById(R.id.tv_device_name); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.tvName.setText(bean); final RadioButton radio=(RadioButton) convertView.findViewById(R.id.rb_light); holder.rb_state = radio; holder.rb_state.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // 重置,确保最多只有一项被选中 for (String key : states.keySet()) { states.put(key, false); } states.put(String.valueOf(position), radio.isChecked()); ListViewAdapter.this.notifyDataSetChanged(); } }); boolean res = false; if (states.get(String.valueOf(position)) == null || states.get(String.valueOf(position)) == false) { res = false; states.put(String.valueOf(position), false); } else res = true; holder.rb_state.setChecked(res); return convertView; } }
http://www.tuicool.com/articles/YjY7je