android基础篇：提示框AlertDialog实例

string.xml

<?xml version="1.0" encoding="utf-8"?>  
<resources>  
    <string name="app_name">TestBase</string>  
    <string name="city_name">城市</string>  
    <string name="city_default">北京</string>  
    <string name="btn_yesorno">是否选择提示框</string>  
    <string name="btn_listitem">列表选择提示框</string>  
</resources>  

　　

main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:orientation="vertical"  
    tools:context="com.mytest.testbase.MainActivity" >  
  
    <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="@string/city_name" />  
  
    <EditText  
        android:id="@+id/city_name"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:hint="@string/city_default"  
        android:inputType="text" />  
  
    <Button  
        android:id="@+id/btn_yesorno"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:onClick="YesOrNoOnClick"  
        android:text="@string/btn_yesorno" />  
      
    <Button  
        android:id="@+id/btn_listitem"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:onClick="ListItemOnClick"  
        android:text="@string/btn_listitem" />      
      
    <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:id="@+id/tv_result" />      
      
      
  
</LinearLayout>  

　　

activity.java

package com.mytest.testbase;  
  
import android.app.Activity;  
import android.app.AlertDialog;  
import android.app.AlertDialog.Builder;  
import android.content.DialogInterface;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.TextView;  
import android.widget.Toast;  
  
public class MainActivity extends Activity {  
  
    private TextView textview_result;  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
  
        textview_result = (TextView) this.findViewById(R.id.tv_result);  
    }  
  
    /** 
     * 是否选择提示框 
     *  
     * @param view 
     */  
    public void YesOrNoOnClick(View view) {  
  
        Builder builder = new AlertDialog.Builder(this);  
  
        builder.setMessage("确认删除吗？").setPositiveButton("是", new DialogInterface.OnClickListener() {  
  
            @Override  
            public void onClick(DialogInterface dialog, int which) {  
                // Toast.makeText(getApplicationContext(), "删除成功",  
                // Toast.LENGTH_SHORT).show();  
                textview_result.setText("删除成功");  
            }  
        }).setNegativeButton("否", new DialogInterface.OnClickListener() {  
  
            @Override  
            public void onClick(DialogInterface dialog, int which) {  
                // Toast.makeText(getApplicationContext(), "删除失败",  
                // Toast.LENGTH_SHORT).show();  
                textview_result.setText("删除失败");  
            }  
  
        });  
  
        AlertDialog dialog = builder.create();  
        dialog.show();  
    }  
  
    /** 
     * 列表项选择提示框 
     *  
     * @param view 
     */  
    public void ListItemOnClick(View view) {  
        Builder builder = new AlertDialog.Builder(this);  
        final String[] cities = { "广州", "上海", "北京", "香港", "澳门" };  
        builder.setTitle("选择城市").setItems(cities, new DialogInterface.OnClickListener() {  
  
            @Override  
            public void onClick(DialogInterface dialog, int which) {  
                textview_result.setText("选择的城市是" + cities[which]);  
            }  
  
        });  
  
        AlertDialog dialog = builder.create();  
        dialog.show();  
    }  
  
}