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();
    }  

}