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"" ["catesname"]=> string(0) "" ["catesid"]=> string(0) "" ["createtime"]=> string(10) "1641183184" ["_id"]=> string(6) "158605" } [5]=> array(10) { ["id"]=> string(5) "28228" ["text"]=> string(39) "tkinter python(图形开发界面)" ["intro"]=> string(288) "目录 ECharts 异步加载 ECharts 数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具,而是在交互、性能、数据处理等方面有更高的要求。 chart.setOption({ color: [ " ["username"]=> string(7) "yudanqu" ["tagsname"]=> string(0) "" ["tagsid"]=> string(0) "" ["catesname"]=> string(0) "" ["catesid"]=> string(0) "" ["createtime"]=> string(10) "1641183159" ["_id"]=> string(5) "28228" } [6]=> array(10) { ["id"]=> string(6) "158613" ["text"]=> string(34) "Tkinter图形界面设计(GUI)" ["intro"]=> string(288) "目录 ECharts 异步加载 ECharts 数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具,而是在交互、性能、数据处理等方面有更高的要求。 chart.setOption({ color: [ " ["username"]=> string(5) "pywjh" ["tagsname"]=> string(0) "" ["tagsid"]=> string(0) "" ["catesname"]=> string(0) "" ["catesid"]=> string(0) "" ["createtime"]=> string(10) 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lwbqqyumidi

Android开发过程中,常常会遇到一些需求场景——在界面上弹出一个弹框,对用户进行提醒并让用户进行某些选择性的操作,

如退出登录时的弹窗,让用户选择“退出”还是“取消”等操作。

Android系统提供了Dialog类,以及Dialog的子类,常见如AlertDialog来实现此类功能。

一般情况下,利用Android提供的Dialog及其子类能够满足多数此类需求,然而,其不足之处体现在:

1. 基于Android提供的Dialog及其子类样式单一,风格上与App本身风格可能不太协调;

2. Dialog弹窗在布局和功能上有所限制,有时不一定能满足实际的业务需求。

本文将通过在Dialog基础上构建自定义的Dialog弹窗,以最常见的确认弹框为例。

本样式相对比较简单:上面有一个弹框标题(提示语),下面左右分别是“确认”和“取消”按钮,当用户点击“确认”按钮时,弹框执行

相应的确认逻辑,当点击“取消”按钮时,执行相应的取消逻辑。

首先,自定义弹框样式:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="wrap_content"
 5     android:background="@drawable/dialog_bg"
 6     android:orientation="vertical" >
 7 
 8     <TextView
 9         android:id="@+id/title"
10         android:layout_width="wrap_content"
11         android:layout_height="wrap_content"
12         android:layout_gravity="center"
13         android:paddingTop="14dp"
14         android:textColor="@color/login_hint"
15         android:textSize="@dimen/text_size_18" />
16 
17     <LinearLayout
18         android:layout_width="match_parent"
19         android:layout_height="wrap_content"
20         android:layout_marginBottom="14dp"
21         android:layout_marginLeft="20dp"
22         android:layout_marginRight="20dp"
23         android:layout_marginTop="30dp" >
24 
25         <TextView
26             android:id="@+id/confirm"
27             android:layout_width="wrap_content"
28             android:layout_height="wrap_content"
29             android:layout_marginRight="10dp"
30             android:layout_weight="1"
31             android:background="@drawable/btn_confirm_selector"
32             android:gravity="center"
33             android:textColor="@color/white"
34             android:textSize="@dimen/text_size_16" />
35 
36         <TextView
37             android:id="@+id/cancel"
38             android:layout_width="wrap_content"
39             android:layout_height="wrap_content"
40             android:layout_marginLeft="10dp"
41             android:layout_weight="1"
42             android:background="@drawable/btn_cancel_selector"
43             android:gravity="center"
44             android:textColor="@color/login_hint"
45             android:textSize="@dimen/text_size_16" />
46     </LinearLayout>
47 
48 </LinearLayout>

 

然后,通过继承Dialog类构建确认弹框控件ConfirmDialog:

 1 package com.corn.widget;
 2 
 3 import android.app.Dialog;
 4 import android.content.Context;
 5 import android.os.Bundle;
 6 import android.util.DisplayMetrics;
 7 import android.view.LayoutInflater;
 8 import android.view.View;
 9 import android.view.Window;
10 import android.view.WindowManager;
11 import android.widget.TextView;
12 
13 import com.corn.R;
14 
15 public class ConfirmDialog extends Dialog {
16 
17     private Context context;
18     private String title;
19     private String confirmButtonText;
20     private String cacelButtonText;
21     private ClickListenerInterface clickListenerInterface;
22 
23     public interface ClickListenerInterface {
24 
25         public void doConfirm();
26 
27         public void doCancel();
28     }
29 
30     public ConfirmDialog(Context context, String title, String confirmButtonText, String cacelButtonText) {
31         super(context, R.style.MyDialog);
32         this.context = context;
33         this.title = title;
34         this.confirmButtonText = confirmButtonText;
35         this.cacelButtonText = cacelButtonText;
36     }
37 
38     @Override
39     protected void onCreate(Bundle savedInstanceState) {
40         // TODO Auto-generated method stub
41         super.onCreate(savedInstanceState);
42 
43         init();
44     }
45 
46     public void init() {
47         LayoutInflater inflater = LayoutInflater.from(context);
48         View view = inflater.inflate(R.layout.confirm_dialog, null);
49         setContentView(view);
50 
51         TextView tvTitle = (TextView) view.findViewById(R.id.title);
52         TextView tvConfirm = (TextView) view.findViewById(R.id.confirm);
53         TextView tvCancel = (TextView) view.findViewById(R.id.cancel);
54 
55         tvTitle.setText(title);
56         tvConfirm.setText(confirmButtonText);
57         tvCancel.setText(cacelButtonText);
58 
59         tvConfirm.setOnClickListener(new clickListener());
60         tvCancel.setOnClickListener(new clickListener());
61 
62         Window dialogWindow = getWindow();
63         WindowManager.LayoutParams lp = dialogWindow.getAttributes();
64         DisplayMetrics d = context.getResources().getDisplayMetrics(); // 获取屏幕宽、高用
65         lp.width = (int) (d.widthPixels * 0.8); // 高度设置为屏幕的0.6
66         dialogWindow.setAttributes(lp);
67     }
68 
69     public void setClicklistener(ClickListenerInterface clickListenerInterface) {
70         this.clickListenerInterface = clickListenerInterface;
71     }
72 
73     private class clickListener implements View.OnClickListener {
74         @Override
75         public void onClick(View v) {
76             // TODO Auto-generated method stub
77             int id = v.getId();
78             switch (id) {
79             case R.id.confirm:
80                 clickListenerInterface.doConfirm();
81                 break;
82             case R.id.cancel:
83                 clickListenerInterface.doCancel();
84                 break;
85             }
86         }
87 
88     };
89 
90 }

在如上空间构造代码中,由于控件的"确认"和"取消"逻辑与实际的应用场景有关,因此,控件中通过定义内部接口来实现。

 

在需要使用此控件的地方,进行如下形式调用:

 1 public static void Exit(final Context context) {
 2         final ConfirmDialog confirmDialog = new ConfirmDialog(context, "确定要退出吗?", "退出", "取消");
 3         confirmDialog.show();
 4         confirmDialog.setClicklistener(new ConfirmDialog.ClickListenerInterface() {
 5             @Override
 6             public void doConfirm() {
 7                 // TODO Auto-generated method stub
 8                 confirmDialog.dismiss();
 9                 //toUserHome(context);
10                 AppManager.getAppManager().AppExit(context);
11             }
12 
13             @Override
14             public void doCancel() {
15                 // TODO Auto-generated method stub
16                 confirmDialog.dismiss();
17             }
18         });
19     }

调用中实现了此控件的内部接口,并赋给控件本身,以此在点击按钮时实现基于外部具体业务逻辑的函数回调。

 

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