Android AlertDialog的基本使用方法

res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextView      android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="@string/hello"    android:id="@+id/tvShowText"/><Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/btnShowAlert" android:text="@string/btn_name"></Button></LinearLayout>

res/values/strings.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="hello">Hello World, EX03_11!</string>    <string name="app_name">ex03_11</string>    <string name="btn_name">點擊我彈出對話方塊</string>    <string name="alert_title">關於</string>    <string name="alert_msg">Hello Android!!!</string></resources>

src/ex03_11.java

package gphone.ex03_11;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class EX03_11 extends Activity {Button btnShowAlert=null;TextView tvShowText=null;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        tvShowText=(TextView)EX03_11.this.findViewById(R.id.tvShowText);        btnShowAlert=(Button)EX03_11.this.findViewById(R.id.btnShowAlert);        btnShowAlert.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stub/*new android.app.AlertDialog.Builder(EX03_11.this)*/new AlertDialog.Builder(EX03_11.this).setTitle(R.string.alert_title).setMessage(R.string.alert_msg).setPositiveButton("OK",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub//EX03_11.this.finish();tvShowText.setText("Hello Android！！！");}}).show();}                } );    }}

運行結果 註：由於我使用的是MIUI定製的系統，所以顯示的AlertDialog有所不同。MINI的ROM下載請點擊www.miui.com