AlertDialog的几种用法
xml代码：
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout 3 xmlns:android="http://schemas.android.com/apk/res/android" 4 xmlns:app="http://schemas.android.com/apk/res-auto" 5 xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 6 android:layout_height="match_parent" 7 android:orientation="vertical" 8 tools:context="com.example.lesson7_3_id19_alertdialog.MainActivity"> 9 10 <Button 11 android:layout_width="match_parent" 12 android:layout_height="wrap_content" 13 android:text="简单的dialog" 14 android:onClick="dialog_1"/> 15 <Button 16 android:layout_width="match_parent" 17 android:layout_height="wrap_content" 18 android:text="列表的dialog" 19 android:onClick="dialog_2"/> 20 <Button 21 android:layout_width="match_parent" 22 android:layout_height="wrap_content" 23 android:text="单选的dialog" 24 android:onClick="dialog_3"/> 25 <Button 26 android:layout_width="match_parent" 27 android:layout_height="wrap_content" 28 android:text="多选的dialog" 29 android:onClick="dialog_4"/> 30 <Button 31 android:layout_width="match_parent" 32 android:layout_height="wrap_content" 33 android:text="自定义View的dialog" 34 android:onClick="dialog_5"/> 35 <Button 36 android:layout_width="match_parent" 37 android:layout_height="wrap_content" 38 android:text="使用adapter的dialog" 39 android:onClick="dialog_6"/> 40 </LinearLayout>
java代码：
1 package com.example.lesson7_3_id19_alertdialog;
2
3 import android.app.AlertDialog;
4 import android.content.DialogInterface;
5 import android.os.Bundle;
6 import android.support.v7.app.AppCompatActivity;
7 import android.view.View;
8 import android.widget.ArrayAdapter;
9 import android.widget.EditText;
10 import android.widget.Toast;
11
12 public class MainActivity extends AppCompatActivity {
13
14 @Override
15 protected void onCreate(Bundle savedInstanceState) {
16 super.onCreate(savedInstanceState);
17 setContentView(R.layout.activity_main);
18 }
19 public void dialog_1(View v){
20 AlertDialog.Builder builder = new AlertDialog.Builder(this);
21 builder.setIcon(R.mipmap.ic_launcher_round);
22
23 builder.setTitle("标题栏");
24 builder.setMessage("正文部分，简单的文本");
25 builder.setPositiveButton("确定",new DialogInterface.OnClickListener() {
26 @Override
27 public void onClick(DialogInterface dialog, int which) {
28 Toast.makeText(MainActivity.this, "点击了确定", Toast.LENGTH_SHORT).show();
29 }
30 });
31 builder.setNegativeButton("取消",null);
32 builder.setNeutralButton("中立",null);
33 AlertDialog alertDialog = builder.create();
34 alertDialog.show();
35
36 }
37 private String [] item = {"游戏","运动","电影","旅游","看书"};
38 public void dialog_2(View v){
39 AlertDialog.Builder builder = new AlertDialog.Builder(this);
40 builder.setTitle("请选择");
41 builder.setItems(item, new DialogInterface.OnClickListener() {
42 @Override
43 public void onClick(DialogInterface dialog, int which) {
44 Toast.makeText(MainActivity.this, "选择了"+item[which], Toast.LENGTH_SHORT).show();
45 }
46 });
47 // 取消可以不添加
48 //builder.setNegativeButton("取消",null);
49 AlertDialog alertDialog = builder.create();
50 alertDialog.show();
51
52 }
53 int index;
54 public void dialog_3(View v){
55 AlertDialog.Builder builder = new AlertDialog.Builder(this);
56 builder.setTitle("请选择");
57 builder.setSingleChoiceItems(item, index, new DialogInterface.OnClickListener() {
58 @Override
59 public void onClick(DialogInterface dialog, int which) {
60 index = which;
61 }
62 });
63 builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
64 @Override
65 public void onClick(DialogInterface dialog, int which) {
66 Toast.makeText(MainActivity.this, "选择了"+item[index], Toast.LENGTH_SHORT).show();
67 }
68 });
69 builder.setNegativeButton("取消",null);
70 AlertDialog alertDialog = builder.create();
71 alertDialog.show();
72 }
73 // 设置boolean数组所有的选项设置默认没选
74 boolean[] bools = {false,false,false,false,false};
75 public void dialog_4(View v){
76 AlertDialog.Builder builder = new AlertDialog.Builder(this);
77 builder.setTitle("请选择");
78 builder.setMultiChoiceItems(item, bools, new DialogInterface.OnMultiChoiceClickListener() {
79 @Override
80 public void onClick(DialogInterface dialog, int which, boolean isChecked) {
81 bools[which] = isChecked;
82 }
83 });
84 builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
85 @Override
86 public void onClick(DialogInterface dialog, int which) {
87 StringBuffer sb = new StringBuffer();
88 for (int i = 0; i < item.length; i++) {
89 if (bools[i]) {
90 sb.append(item[i] + " ");
91 }
92 }
93 Toast.makeText(MainActivity.this, "选择了" + sb.toString(), Toast.LENGTH_SHORT).show();
94 }
95 });
96 builder.setNegativeButton("取消",null);
97 AlertDialog alertDialog = builder.create();
98 alertDialog.show();
99 }
100 public void dialog_5(View v){
101 AlertDialog.Builder builder = new AlertDialog.Builder(this);
102 builder.setTitle("连接wifi");
103 final EditText et = new EditText(this);
104 et.setHint("请输入密码");
105 et.setSingleLine(true);
106 builder.setView(et);
107 builder.setNegativeButton("取消",null);
108 builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
109 @Override
110 public void onClick(DialogInterface dialog, int which) {
111 String password = et.getText().toString();
112 if (password.equals("123456")) {
113 Toast.makeText(MainActivity.this, "连接成功", Toast.LENGTH_SHORT).show();
114 }else{
115 Toast.makeText(MainActivity.this, "密码错误", Toast.LENGTH_SHORT).show();
116 }
117 }
118 });
119 AlertDialog alertDialog = builder.create();
120 alertDialog.show();
121
122 }
123 public void dialog_6(View v){
124 ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,item);
125 AlertDialog.Builder builder = new AlertDialog.Builder(this);
126 builder.setTitle("使用适配器");
127 builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
128 @Override
129 public void onClick(DialogInterface dialog, int which) {
130 Toast.makeText(MainActivity.this, "选择了"+item[which], Toast.LENGTH_SHORT).show();
131 }
132 });
133 AlertDialog alertDialog = builder.create();
134 alertDialog.show();
135 }
136 }
分类: android