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package com.js.listdialogtest1; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class ListDialogTest1 extends Activity implements OnClickListener { private Button btnListDialog; private String[] provinces = new String[] { "上海" , "北京" , "湖南" , "湖北" , "海南" }; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.main); btnListDialog = (Button) findViewById(R.id.btnListDialog); btnListDialog.setOnClickListener( this ); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btnListDialog: showListDialog(); break ; } } private void showListDialog() { AlertDialog.Builder builder = new AlertDialog.Builder( this ); builder.setTitle( "请选择省份" ); /** * 1、public Builder setItems(int itemsId, final OnClickListener * listener) itemsId表示字符串数组的资源ID,该资源指定的数组会显示在列表中。 2、public Builder * setItems(CharSequence[] items, final OnClickListener listener) * items表示用于显示在列表中的字符串数组 */ builder.setItems(provinces, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { /* * ad变量用final关键字定义,因为在隐式实现的Runnable接口 的run()方法中 需要访问final变量。 */ final AlertDialog ad = new AlertDialog.Builder( ListDialogTest1. this ).setMessage( "你选择的是:" + which + ": " + provinces[which]).show(); Handler handler = new Handler(); Runnable runnable = new Runnable() { @Override public void run() { // 调用AlertDialog类的dismiss()方法关闭对话框,也可以调用cancel()方法。 ad.dismiss(); } }; // 5秒后运行run()方法。 handler.postDelayed(runnable, 5 * 1000 ); } }); builder.create().show(); } } |