android基础篇：提示框AlertDialog实例

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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>

MainActivity.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;@Overrideprotected 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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic void onClick(DialogInterface dialog, int which) {textview_result.setText("选择的城市是" + cities[which]);}});AlertDialog dialog = builder.create();dialog.show();}}

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