Android Composite(Dialog)详解

目录：
    1.Dialog概述
    2.Dialog中的重要角色
    3.常见几种类型的Dialog简单使用
        3.1 提示型Dialog实现
        3.2 List型Dialog实现
        3.3 单选型Dialog实现
        3.4 多选型Dialog实现
        3.5 自定义Dialog
    
1.Dialog概述
    Dialog就是一个对用户操作进行反馈的弹框，通常在弹框中进行一些简单的提示或者简单选择。
    
2.Dialog中的重要角色
    2.1 AlertDialog类：
        AlertDialog即我们使用的窗口类，可以通过AlertDialog类的相关方法设置Dialog的属性以及显示，通常我们通过他的内部
    类Builder来构建他的实例，主要原因在于它的构造方法都是受保护的。
       
    2.2 AlertDialog.Builder类：
        AlertDialog.Builder即AlertDialog内的类，通过它来实例化Dialog，同时也可以通过他来设置AlertDialog的属性资源和
    Dialog的显示
    
3.常见几种类型的Dialog简单使用
    3.1 MainActivity.java

package com.example.dialog;import android.content.DialogInterface;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;import java.util.ArrayList;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private Button simpleButton,listButton,singleButton,multiButton,customButton;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //初始化控件        simpleButton = (Button) findViewById(R.id.info_dg);        listButton = (Button) findViewById(R.id.list_dg);        singleButton = (Button) findViewById(R.id.single_dg);        multiButton = (Button) findViewById(R.id.multi_dg);        customButton = (Button) findViewById(R.id.custom_dg);        //设置监听器        simpleButton.setOnClickListener(this);        listButton.setOnClickListener(this);        singleButton.setOnClickListener(this);        multiButton.setOnClickListener(this);        customButton.setOnClickListener(this);    }    /** 弹出单选型的弹框* */    public void showMultiDialog(){        //声明并初始化数据        final CharSequence[] items = {"篮球","足球","游泳","唱歌"};        final StringBuilder checkedStr = new StringBuilder();        //声明并初始化AlertDialog.Builder        AlertDialog.Builder builder = new AlertDialog.Builder(this);        //设置AlertDialog标题        builder.setTitle("多选弹框标题");        //设置图标        builder.setIcon(R.drawable.a12);        //设置数据        builder.setMultiChoiceItems(items, null, new DialogInterface.OnMultiChoiceClickListener() {            @Override            public void onClick(DialogInterface dialog, int which, boolean isChecked) {                if (isChecked){                    checkedStr.append(items[which].toString());                }            }        });        builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(MainActivity.this,checkedStr,Toast.LENGTH_SHORT).show();            }        });        //展示弹框        builder.show();    }    /** 弹出单选型的弹框* */    public void showSingleDialog(){        //声明并初始化数据        final CharSequence[] items = {"男","女","不男不女"};        //声明并初始化AlertDialog.Builder        AlertDialog.Builder builder = new AlertDialog.Builder(this);        //设置AlertDialog标题        builder.setTitle("单选弹框标题");        //设置图标        builder.setIcon(R.drawable.a12);        //设置数据        builder.setSingleChoiceItems(items,1, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                String selectItem = items[which].toString();                Toast.makeText(MainActivity.this,selectItem,Toast.LENGTH_SHORT).show();            }        });        builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(MainActivity.this,"确认",Toast.LENGTH_SHORT).show();            }        });        //展示弹框        builder.show();    }    /*    * 弹出list型的弹框    * */    public void showListDialog(){        //声明并初始化数据        final CharSequence[] items = new CharSequence[5];        for (int i =0;i<5;i++){            items[i] ="数据"+i;        }        //声明并初始化AlertDialog.Builder        AlertDialog.Builder builder = new AlertDialog.Builder(this);        //设置AlertDialog标题        builder.setTitle("List型弹框标题");        //设置图标        builder.setIcon(R.drawable.a12);        //设置数据并实现点击监听        builder.setItems(items, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                //获取选中项文本                String selectItem = items[which].toString();                Toast.makeText(MainActivity.this,selectItem,Toast.LENGTH_SHORT).show();            }        });        builder.show();    }    /*    * 弹出简单的弹框    * */    public void showSimpleDialog(){        //声明并初始化AlertDialog.Builder        AlertDialog.Builder builder = new AlertDialog.Builder(this);        //设置AlertDialog标题        builder.setTitle("普通弹框标题");        //设置图标        builder.setIcon(R.drawable.a12);        //设置提示信息        builder.setMessage("普通弹框提示信息...");        //设置确认按钮        builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(MainActivity.this,"确认",Toast.LENGTH_SHORT).show();            }        });        //设置普通按钮        builder.setNeutralButton("快点我", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(MainActivity.this,"我就知道你要点我",Toast.LENGTH_SHORT).show();            }        });        //设置取消按钮        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(MainActivity.this,"取消",Toast.LENGTH_SHORT).show();            }        });        builder.show();    }    /*    * 弹出自定义的弹框    * */    public void showCustomDialog(){        final EditText userName,passWord;        //声明并初始化布局加载器        //LayoutInflater Inflater =getLayoutInflater();        LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);        //加载自定义布局        View view = inflater.inflate(R.layout.custom_dialog,null);        //初始化布局控件        userName = (EditText) view.findViewById(R.id.username_et);        passWord = (EditText) view.findViewById(R.id.pas_et);        //声明并初始化AlertDialog.Builder        AlertDialog.Builder builder = new AlertDialog.Builder(this);        //设置布局        builder.setView(view);        //设置登录按钮        builder.setPositiveButton("登陆", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                String nameStr = userName.getText().toString();                String passStr = passWord.getText().toString();                Toast.makeText(MainActivity.this,"用户名："+nameStr+",密码:"+passStr,Toast.LENGTH_SHORT).show();            }        });        //设置取消按钮        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Toast.makeText(MainActivity.this,"取消登录",Toast.LENGTH_SHORT).show();            }        });        builder.show();    }    /*    * 继承实现监听响应    * */    @Override    public void onClick(View v) {        switch (v.getId()){            case R.id.info_dg:                showSimpleDialog();                break;            case R.id.list_dg:                showListDialog();                break;            case R.id.single_dg:                showSingleDialog();                break;            case R.id.multi_dg:                showMultiDialog();                break;            case R.id.custom_dg:                showCustomDialog();                break;        }    }} 

      
    3.2 主布局activity_main.xml
    

<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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.dialog.MainActivity">    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="提示型Dialog"        android:id="@+id/info_dg"        android:layout_alignParentTop="true"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="List型Dialog"        android:id="@+id/list_dg"        android:layout_alignTop="@+id/info_dg"        android:layout_toRightOf="@+id/info_dg"        android:layout_toEndOf="@+id/info_dg" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="单选型Dialog"        android:id="@+id/single_dg"        android:layout_alignTop="@+id/list_dg"        android:layout_toRightOf="@+id/list_dg"        android:layout_toEndOf="@+id/list_dg" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="多选型Dialog"        android:id="@+id/multi_dg"        android:layout_below="@+id/info_dg"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="自定义Dialog"        android:id="@+id/custom_dg"        android:layout_alignTop="@+id/multi_dg"        android:layout_toRightOf="@+id/multi_dg"        android:layout_toEndOf="@+id/multi_dg" /></RelativeLayout>    

  
    3.3 自定义布局custom_dialog.xml
 

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:padding="16dp"    android:background="@color/colorAccent"    android:weightSum="1">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textAppearance="?android:attr/textAppearanceLarge"        android:text="登陆"        android:id="@+id/title_login"        android:layout_gravity="center_horizontal"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true" />    <RelativeLayout        android:layout_marginTop="10dp"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/title_login"        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textAppearance="?android:attr/textAppearanceLarge"            android:text="用户名："            android:id="@+id/username"            android:layout_alignBaseline="@+id/username_et"            android:layout_alignParentTop="true"            android:layout_alignParentLeft="true"            android:layout_alignParentStart="true" />        <EditText            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:inputType="textPersonName"            android:hint="请输入用户名"            android:ems="10"            android:id="@+id/username_et"            android:layout_alignParentTop="true"            android:layout_toRightOf="@+id/username"            android:layout_alignParentRight="true"            android:layout_alignParentEnd="true" />        <EditText            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:inputType="textPassword"            android:ems="10"            android:id="@+id/pas_et"            android:hint="请输入密码"            android:layout_below="@+id/username_et"            android:layout_alignLeft="@+id/username_et"            android:layout_alignStart="@+id/username_et"            android:layout_alignParentRight="true"            android:layout_alignParentEnd="true" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textAppearance="?android:attr/textAppearanceLarge"            android:text="密码："            android:id="@+id/password"            android:layout_alignBaseline="@+id/pas_et"            android:layout_alignTop="@+id/pas_et"            android:layout_alignParentLeft="true"            android:layout_alignParentStart="true" />    </RelativeLayout></RelativeLayout>

   
      
    3.4 效果截图(依次为：简单dialog,List型Dialog实现,单选型Dialog,多选型Dialog,自定义Dialog)
       

    

    
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