View（视图）——对话框之单选对话框和复选对话框

一.单选对话框

<?xml version="1.0" encoding="utf-8"?>
<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: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="com.example.wang.testapp2.TestActivity5"
    android:orientation="vertical">


    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="单选对话框"
        android:onClick="bt2_OnClick"
        />

</LinearLayout>

package com.example.wang.testapp2;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class TestActivity5 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test5);

    }


    //单选对话框
    public  void bt2_OnClick(View v)
    {
        //final  可以使这个常量的生命周期延长到整个对象
        final String[] str={"男","女"};

        new  AlertDialog.Builder(this)
                .setTitle("单选对话框")
                .setSingleChoiceItems(str, 0, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        Toast.makeText(TestActivity5.this, "which="+which+",选中的是"+str[which], Toast.LENGTH_SHORT).show();

                        //点击关闭对话框
                        //a.dismiss();
                        dialog.dismiss();
                    }
                })
                .setCancelable(false)
                .show();
    }

}

二.复选对话框

<?xml version="1.0" encoding="utf-8"?>
<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: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="com.example.wang.testapp2.TestActivity5"
    android:orientation="vertical">


    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="复选对话框"
        android:onClick="bt3_OnClick"
        />

</LinearLayout>

package com.example.wang.testapp2;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class TestActivity5 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test5);

    }

    //复选对话框
    public  void bt3_OnClick(View v)
    {
        final String[] str={"宝马","奔驰","劳斯莱斯","宾利"};
        final boolean[] ch={true,false,false,true};

        new AlertDialog.Builder(this)
                .setTitle("复选对话框")
                .setMultiChoiceItems(str, ch, new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which, boolean isChecked) {

                        //改变对应数组项的选中状态
                        ch[which]=isChecked;
                    }
                })
                .setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        int i=0;
                        //获取最终的选中状态
                        for (boolean b:ch)
                        {
                            Toast.makeText(TestActivity5.this, str[i]+"选中状态="+(b?"选中":"未选中"), Toast.LENGTH_SHORT).show();

                            i++;
                        }
                    }
                })
                .setNegativeButton("取消", null)
                .setCancelable(false)
                .show();
    }

}