对话框AlertDialog的基本类型与创建

测试代码：

布局：

activity_main.xml：

 <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:orientation="vertical"
     tools:context="com.zzw.testalerdialog.MainActivity" >

     <Button
         android:id="@+id/horizontally"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:text="横向显示" />

     <Button
         android:id="@+id/vertical"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:paddingTop="20dp"
         android:text="竖向显示" />

     <Button
         android:id="@+id/singleChoice"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:paddingTop="20dp"
         android:text="单选框显示" />

     <Button
         android:id="@+id/multiChoice"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:paddingTop="20dp"
         android:text="多选框显示" />

     <Button
         android:id="@+id/myDialog"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:paddingTop="20dp"
         android:text="自定义显示" />

     <ImageView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:layout_weight="1"
         android:src="@drawable/ic_launcher" />

 </LinearLayout>

JAVA代码：

 package com.zzw.testalerdialog;

 import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Toast;

 public class MainActivity extends Activity implements View.OnClickListener {

     private Context context;

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

         init();
     }

     private void init() {

         context = this;

         findViewById(R.id.horizontally).setOnClickListener(this);
         findViewById(R.id.vertical).setOnClickListener(this);
         findViewById(R.id.singleChoice).setOnClickListener(this);
         findViewById(R.id.multiChoice).setOnClickListener(this);
         findViewById(R.id.myDialog).setOnClickListener(this);

     }

     // 横向类型显示
     private void horizontallyShow() {

         AlertDialog dialog = new AlertDialog.Builder(context).create();
         dialog.setIcon(R.drawable.ic_launcher);
         dialog.setTitle("横向显示");
         dialog.setMessage("提示信息");
         // DialogInterface.BUTTON_POSITIVE作用是显示的顺序
         dialog.setButton(DialogInterface.BUTTON_POSITIVE, "确定", new DialogInterface.OnClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which) {
                 Toast.makeText(context, "确定", 0).show();
             }
         });

         dialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which) {
                 Toast.makeText(context, "取消", 0).show();
             }
         });

         dialog.setButton(DialogInterface.BUTTON_NEUTRAL, "考虑", new DialogInterface.OnClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which) {
                 Toast.makeText(context, "考虑", 0).show();
             }
         });

         dialog.show();
     }

     // 竖向类型显示
     private void verticalShow() {

         final String[] items = new String[3];
         for (int i = 0; i < 3; i++) {
             items[i] = "选项--" + i;
         }

         AlertDialog dialog = new AlertDialog.Builder(context).setItems(items, new DialogInterface.OnClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which) {

                 Toast.makeText(context, items[which], Toast.LENGTH_SHORT).show();
             }
         }).create();

         dialog.setTitle("竖向显示");
         dialog.setIcon(R.drawable.ic_launcher);

         dialog.show();

     }

     // 单选框类型显示
     private void singleChoiceShow() {

         final String[] items = new String[3];
         for (int i = 0; i < 3; i++) {
             items[i] = "选项--" + i;
         }

         AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
         // mBuilder.setIcon(R.drawable.ic_launcher);
         // mBuilder.setTitle("单选框显示");

         // checkedItem默认选择的位置参数
         mBuilder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which) {
                 Toast.makeText(context, items[which], Toast.LENGTH_SHORT).show();
                 dialog.dismiss();

             }
         });

         AlertDialog dialog = mBuilder.create();
         dialog.setIcon(R.drawable.ic_launcher);
         dialog.setTitle("单选框显示");
         dialog.show();

     }

     // 复选框类型显示
     private void multiChoiceShow() {

         final String[] items = new String[3];
         for (int i = 0; i < 3; i++) {
             items[i] = "选项--" + i;
         }

         AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);

         // checkedItems为默认勾选的状态
         final boolean[] checkedItems = { false, true, false };
         // 这个监听的作用是用于检测item选中状态的变化
         mBuilder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which, boolean isChecked) {

             }
         });

         AlertDialog dialog = mBuilder.create();
         dialog.setIcon(R.drawable.ic_launcher);
         dialog.setTitle("复选框显示");

         // 用于确定，知道用户勾选了那些选项
         dialog.setButton(DialogInterface.BUTTON_POSITIVE, "确定", new DialogInterface.OnClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which) {

                 String s = "";
                 for (int i = 0; i < items.length; i++) {
                     if (checkedItems[i])
                         s += items[i] + "\n";
                 }
                 Toast.makeText(context, s, Toast.LENGTH_SHORT).show();
             }
         });

         // 用于取消
         dialog.setButton(DialogInterface.BUTTON_NEUTRAL, "取消", new DialogInterface.OnClickListener() {

             @Override
             public void onClick(DialogInterface dialog, int which) {

             }
         });

         dialog.show();
     }

     //自定义类型显示
     private void myDialogShow(){

         AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);

         mBuilder.setView(getLayoutInflater().inflate(R.layout.my_dialog, null));

         AlertDialog dialog=mBuilder.create();
 //        dialog.setIcon(R.drawable.ic_launcher);
 //        dialog.setTitle("自定义的对话框");
         dialog.show();
     }

     @Override
     public void onClick(View v) {

         switch (v.getId()) {
         case R.id.horizontally:

             horizontallyShow();
             break;
         case R.id.vertical:

             verticalShow();
             break;
         case R.id.singleChoice:

             singleChoiceShow();
             break;
         case R.id.multiChoice:

             multiChoiceShow();
             break;
         case R.id.myDialog:
             myDialogShow();
             break;

         }
     }

 }

自定义的布局my_dialog.xml：

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:background="#80CBC4"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical" >

     <ImageView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:src="@drawable/ic_launcher" />

     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:text="www.cnblogs.com/zzw1994"
         android:textColor="@android:color/holo_red_light" />

 </LinearLayout>