• View(视图)——对话框之自定义对话框


    一.自定义对话框

         1.不能直接实例化使用

         2.使用内部构造器来生成对话框

         3.new  AlertDialog.Builder(context)  实例化构造器

            1-setTitle (标题)

            2-setMessage (消息)

            3-按钮

              1°确认按钮  setPositiveButton(“文字”,点击事件监听器)

              2°否认按钮  setNegativeButton(“文字”,点击事件监听器)

              3°中立按钮  setNeutralButton(“文字”,点击事件监听器)

            4-show() 创建后显示对话框,并返回AlertDialog实例

            5-create() 生成对话框并返回

            6-setCancelable(true/false) 

         4.Builder方法

            setView();

            1-1.用加载器加载layout文件

                1°第一种方式:LayoutInflater layoutInflater=getLayoutInflater();

                                    layoutInflater.inflate();

                2°第二种方式:View.inflate(context, layout文件的id, Viewl);

            2-2.纯java代码定义View

         5.获得Layout中的组件

            调用容器的findViewById(id)

             1-加载了Layout文件的View

             2-当前自定义对话框实例,在按钮的OnClick回调方法里,AlertDialog a1 = (AlertDialog) dialog;

    二.自定义对话框

       1.用加载器加载layout文件方法

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"
     3     xmlns:tools="http://schemas.android.com/tools"
     4     android:layout_width="match_parent"
     5     android:layout_height="match_parent"
     6     android:paddingBottom="@dimen/activity_vertical_margin"
     7     android:paddingLeft="@dimen/activity_horizontal_margin"
     8     android:paddingRight="@dimen/activity_horizontal_margin"
     9     android:paddingTop="@dimen/activity_vertical_margin"
    10     tools:context="com.example.wang.testapp2.TestActivity5"
    11     android:orientation="vertical">
    12 
    13 
    14     <Button
    15         android:layout_width="match_parent"
    16         android:layout_height="wrap_content"
    17         android:text="自定义对话框"
    18         android:onClick="bt4_OnClick"
    19         />
    20 
    21 
    22 
    23 </LinearLayout>
    用加载器加载layout文件方法
     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     3     android:orientation="vertical" android:layout_width="match_parent"
     4     android:layout_height="match_parent">
     5 
     6     <ImageView
     7         android:layout_width="wrap_content"
     8         android:layout_height="wrap_content"
     9         android:src="@drawable/car"
    10         android:layout_gravity="center"/>
    11 </LinearLayout>
    Dialoglayout
     1 package com.example.wang.testapp2;
     2 
     3 import android.app.AlertDialog;
     4 import android.app.DatePickerDialog;
     5 import android.app.TimePickerDialog;
     6 import android.content.DialogInterface;
     7 import android.opengl.ETC1Util;
     8 import android.support.v7.app.AppCompatActivity;
     9 import android.os.Bundle;
    10 import android.view.LayoutInflater;
    11 import android.view.View;
    12 import android.widget.DatePicker;
    13 import android.widget.EditText;
    14 import android.widget.ImageView;
    15 import android.widget.TimePicker;
    16 import android.widget.Toast;
    17 
    18 import java.util.Calendar;
    19 
    20 public class TestActivity5 extends AppCompatActivity {
    21 
    22     @Override
    23     protected void onCreate(Bundle savedInstanceState) {
    24         super.onCreate(savedInstanceState);
    25         setContentView(R.layout.activity_test5);
    26 
    27     }
    28 
    29     //自定义对话框
    30     public void bt4_OnClick(View v)
    31     {
    32         //1.layout文件加载器
    33         LayoutInflater layoutInflater=getLayoutInflater();
    34 
    35         View view=layoutInflater.inflate(R.layout.dialoglayout, null);
    36 
    37         //2.View的静态方法
    38 //        View view=View.inflate(this, R.layout.dialoglayout, null);
    39 
    40 
    41 
    42         new AlertDialog.Builder(this)
    43                 .setTitle("自定义对话框")
    44 
    45                 //.setView(R.layout.dialoglayout)
    46                 .setView(view)
    47 
    48                 .setPositiveButton("确定", null)
    49 
    50                 .show();
    51     }
    52 
    53 }
    用加载器加载layout文件方法

         2.纯java代码定义View

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"
     3     xmlns:tools="http://schemas.android.com/tools"
     4     android:layout_width="match_parent"
     5     android:layout_height="match_parent"
     6     android:paddingBottom="@dimen/activity_vertical_margin"
     7     android:paddingLeft="@dimen/activity_horizontal_margin"
     8     android:paddingRight="@dimen/activity_horizontal_margin"
     9     android:paddingTop="@dimen/activity_vertical_margin"
    10     tools:context="com.example.wang.testapp2.TestActivity5"
    11     android:orientation="vertical">
    12 
    13 
    14     <Button
    15         android:layout_width="match_parent"
    16         android:layout_height="wrap_content"
    17         android:text="自定义对话框"
    18         android:onClick="bt4_OnClick"
    19         />
    20 
    21 
    22 </LinearLayout>
    纯java代码定义View
     1 package com.example.wang.testapp2;
     2 
     3 import android.app.AlertDialog;
     4 import android.app.DatePickerDialog;
     5 import android.app.TimePickerDialog;
     6 import android.content.DialogInterface;
     7 import android.opengl.ETC1Util;
     8 import android.support.v7.app.AppCompatActivity;
     9 import android.os.Bundle;
    10 import android.view.LayoutInflater;
    11 import android.view.View;
    12 import android.widget.DatePicker;
    13 import android.widget.EditText;
    14 import android.widget.ImageView;
    15 import android.widget.TimePicker;
    16 import android.widget.Toast;
    17 
    18 import java.util.Calendar;
    19 
    20 public class TestActivity5 extends AppCompatActivity {
    21 
    22     @Override
    23     protected void onCreate(Bundle savedInstanceState) {
    24         super.onCreate(savedInstanceState);
    25         setContentView(R.layout.activity_test5);
    26 
    27     }
    28 
    29     //自定义对话框
    30     public void bt4_OnClick(View v)
    31     {
    32         
    33         //3.java代码
    34         ImageView view=new ImageView(this);
    35 
    36         view.setImageResource(R.drawable.ccc);
    37 
    38 
    39         new AlertDialog.Builder(this)
    40                 .setTitle("自定义对话框")
    41 
    42                 //.setView(R.layout.dialoglayout)
    43                 .setView(view)
    44 
    45                 .setPositiveButton("确定", null)
    46 
    47                 .show();
    48     }
    49 
    50 }
    纯java代码定义View

    三.登录对话框

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"
     3     xmlns:tools="http://schemas.android.com/tools"
     4     android:layout_width="match_parent"
     5     android:layout_height="match_parent"
     6     android:paddingBottom="@dimen/activity_vertical_margin"
     7     android:paddingLeft="@dimen/activity_horizontal_margin"
     8     android:paddingRight="@dimen/activity_horizontal_margin"
     9     android:paddingTop="@dimen/activity_vertical_margin"
    10     tools:context="com.example.wang.testapp2.TestActivity5"
    11     android:orientation="vertical">
    12 
    13 
    14     <Button
    15         android:layout_width="match_parent"
    16         android:layout_height="wrap_content"
    17         android:text="登录对话框"
    18         android:onClick="bt5_OnClick"
    19         />
    20 
    21 
    22 </LinearLayout>
    登录
     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     3     android:orientation="vertical"
     4     android:layout_width="match_parent"
     5     android:layout_height="match_parent"
     6     android:layout_margin="16dp">
     7 
     8     <EditText
     9         android:layout_width="match_parent"
    10         android:layout_height="wrap_content"
    11         android:hint="用户名"
    12         android:id="@+id/et_1"
    13         android:layout_margin="16dp"/>
    14 
    15     <EditText
    16         android:layout_width="match_parent"
    17         android:layout_height="wrap_content"
    18         android:hint="密码"
    19         android:inputType="textPassword"
    20         android:id="@+id/et_2"
    21         android:layout_margin="16dp"/>
    22 </LinearLayout>
    Dialog_login
     1 package com.example.wang.testapp2;
     2 
     3 import android.app.AlertDialog;
     4 import android.app.DatePickerDialog;
     5 import android.app.TimePickerDialog;
     6 import android.content.DialogInterface;
     7 import android.opengl.ETC1Util;
     8 import android.support.v7.app.AppCompatActivity;
     9 import android.os.Bundle;
    10 import android.view.LayoutInflater;
    11 import android.view.View;
    12 import android.widget.DatePicker;
    13 import android.widget.EditText;
    14 import android.widget.ImageView;
    15 import android.widget.TimePicker;
    16 import android.widget.Toast;
    17 
    18 import java.util.Calendar;
    19 
    20 public class TestActivity5 extends AppCompatActivity {
    21 
    22     @Override
    23     protected void onCreate(Bundle savedInstanceState) {
    24         super.onCreate(savedInstanceState);
    25         setContentView(R.layout.activity_test5);
    26 
    27     }
    28 
    29     //登录对话框
    30     public void bt5_OnClick(View v)
    31     {
    32         final View view=View.inflate(this,R.layout.dialog_login,null);
    33 
    34         new AlertDialog.Builder(this)
    35                 .setTitle("登录对话框")
    36                 .setView(view)
    37                 .setPositiveButton("登录", new DialogInterface.OnClickListener() {
    38                     @Override
    39                     public void onClick(DialogInterface dialog, int which) {
    40 
    41                         //转换
    42                         AlertDialog a1 = (AlertDialog) dialog;
    43 
    44                         //获取输入信息
    45                         EditText et_1 = (EditText) view.findViewById(R.id.et_1);
    46 
    47                         Toast.makeText(TestActivity5.this, "用户名=" + et_1.getText(), Toast.LENGTH_SHORT).show();
    48 
    49                         //验证并提示
    50 
    51                     }
    52                 })
    53                 .setNegativeButton("取消", null)
    54                 .show();
    55 
    56     }
    57 
    58 }
    登录

          

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  • 原文地址:https://www.cnblogs.com/arxk/p/5491212.html
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