Android 对话框

1.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.android">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity"></activity>
        <activity android:name=".TestActivity4">

        </activity>
        <activity android:name=".Main2Activity"></activity>
        <activity android:name=".Main3Activity">
            <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter></activity>
    </application>

</manifest>

2.activity_mani3.xml

<?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"
    tools:context="com.example.administrator.android.Main3Activity"
    android:orientation="vertical">
    <!--对话框-->
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="一般对话框"
            android:onClick="bt1_onclick"/>
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="单选对话框"
            android:onClick="bt2_onclick"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="复选对话框"
        android:onClick="bt3_onclick"/>
</LinearLayout>

3.Mani3Activity.java

【一般对话框的添加】

package com.example.administrator.android;

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

public class Main3Activity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
    }

    public void bt1_onclick(View v) {
        //一般对话框 不能直接实例化
        //内部提供构造器
        //方法链调用
        AlertDialog alertDialog = new AlertDialog.Builder(this)
                .setTitle("确认对话框")
                .setMessage("您确实要删除吗？")
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(Main3Activity.this, "取消删除……，which = " + which, Toast.LENGTH_SHORT).show();
                    }
                })//负面按钮

                .setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(Main3Activity.this, "执行删除……，which = " + which, Toast.LENGTH_SHORT).show();
                    }
                })//正面按钮

                .setNeutralButton("中立", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(Main3Activity.this, "执行命令……，which = " + which, Toast.LENGTH_SHORT).show();
                    }
                })//普通按钮
                .setCancelable(false) //杜绝点击其他位置关闭对话框 不能以分号结尾
                .show(); //显示对话框的方法
    }
}

【单选对话框】

package com.example.administrator.android;

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

public class Main3Activity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
    }
//单选对话框
    public void bt2_onclick(View v) {
        //final，中态 延长常量生命周期
        final String[] str = {"男", "女"};
        final AlertDialog a = 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(Main3Activity.this, "which = " + which +
                                "，选中的是：" + str[which], Toast.LENGTH_LONG).show();
                        //关闭对话框
                        dialog.dismiss();
                    }
                })
                .setCancelable(false)  //模态窗口
                .show();
    }
}

【复选对话框】

package com.example.administrator.android;

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

public class Main3Activity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
    }
//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值状态
                        ch[which]=isChecked;
                    }
                })
                //添加响应按钮
                .setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        int i = 0;
                        //获取最终的选择状态
                        for (boolean b:ch)
                        {
                            Toast.makeText(Main3Activity.this,str[i]+"选中的输出状态="+
                                    (b?"选中":"未选中"),Toast.LENGTH_LONG).show();
                            i++;
                        }
                    }
                })
                .setNegativeButton("取消", null)
                .setCancelable(false)
                .show();
    }
}