Android初级教程三个Dialog对话框小案例

<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"
tools:context=".MainActivity"
android:orientation="vertical">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="确定取消对话框"
android:onClick="click"/>

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="单选对话框"
android:onClick="click2"/>

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="多选对话框"
android:onClick="click3"/>

</LinearLayout>

package com.example.dialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

//这里是确定取消对话框
public void click(View v){
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setIcon(android.R.drawable.alert_dark_frame);
dialog.setTitle("欲练此功必先自宫");
dialog.setCancelable(false);
dialog.setMessage("东方教主，一统江湖！");
//设置确定按钮
dialog.setPositiveButton("确定", new OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "感谢使用，再见", 0).show();

}
});
//设置取消按钮
dialog.setNegativeButton("取消", new OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "若不自宫，一定不成功", 0).show();

}
});
//让对话框显示
dialog.show();
}

//设置单选
public void click2(View v){
AlertDialog.Builder builder = new Builder(this);
builder.setTitle("请选择性别");

final String[] items = new String[]{
"男",
"女"
};
builder.setSingleChoiceItems(items, -1, new OnClickListener() {
//which：用户所选条目下标
//dialog：出发这个方法的该对话框实例对象
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "您的选择是："+items[which], 0).show();
dialog.dismiss();
}
});

builder.show();
}

//设置多选对话框
public void click3(View v){
AlertDialog.Builder builder = new Builder(this);
builder.setTitle("请选择您觉得帅的人");
final String[] items = new String[]{
"侃哥",
"找帅哥",
"杨道龙",
"小杨" };
//设置选中第几个选项
final boolean[] checkedItems = new boolean[] { true, true, false, false };

builder.setMultiChoiceItems(items, checkedItems,
new OnMultiChoiceClickListener() {

@Override
public void onClick(DialogInterface dialog, int which,
boolean isChecked) {
checkedItems[which] = isChecked;

}
});

builder.setPositiveButton("确定", new OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
String text = "";
for (int i = 0; i < 4; i++) {
text += checkedItems[i] ? items[i] + "," : "";//吐丝显示选中选项
}

Toast.makeText(MainActivity.this, text, 0).show();
dialog.dismiss();

}
});

builder.show();
}
}