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操作环境
Windows 10Android Developer Tools (Build: v22.2.1-833290)Android 4.3代码
res/layout/activity_main.xml
代码如下:
<RelativeLayout xmlns:android="/apk/res/android"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context=".MainActivity" ><TextViewandroid:id="@+id/textView1"android:layout_width="wrap_content"android:layout_height="wrap_content" /><Buttonandroid:id="@+id/button1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_below="@+id/textView1"android:layout_centerHorizontal="true"android:layout_marginTop="90dp"android:text="点击开启一个对话框"android:onClick="onclick" /></RelativeLayout>
src/com/example/duihuakuang/MainActivity.java
代码如下:
package com.example.duihuakuang;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.widget.Toast;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}public void onclick(View view){AlertDialog.Builder builder = new Builder(this);builder.setIcon(null);//设置图标, 这里设为空值builder.setTitle("");builder.setMessage("确定要取消吗");builder.setPositiveButton("确定", new OnClickListener(){public void onClick(DialogInterface arg0, int arg1){Toast.makeText(MainActivity.this,"确定成功!",Toast.LENGTH_SHORT).show();}});builder.setNegativeButton("取消", new OnClickListener(){public void onClick(DialogInterface arg0,int arg1){Toast.makeText(MainActivity.this, "取消成功!", Toast.LENGTH_SHORT).show();}});AlertDialog b = builder.create();b.show();//显示对话框}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}
运行效果
程序首页效果:
图 1
点击“点击开启一个对话框”按钮后的效果:
图 2
点击“确定”按钮后的效果:
图 3
点击“取消”按钮后的效果:
图 4