本文实例讲述了Android 开发使用Activity实现加载等待界面功能。分享给大家供大家参考,具体如下:
实现加载等待界面我用了两种方式,一种是用PopupWindow实现,另一种便是用Activity实现。用PopupWindow实现方法请见我的另一篇博客:
好了,下面开始。先上效果:
基本原理就是在主界面点击按钮(以登录按钮为例)之后,打开一个新的Activity,此Activity以对话框形式展示。首先,主界面(一个登录按钮以及它的监听事件):
activity_main.xml
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<? xml version = "1.0" encoding = "utf-8" ?> < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tools = "http://schemas.android.com/tools" android:id = "@+id/activity_main" 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" android:orientation = "vertical" tools:context = "com.toprs.waitingpractice.MainActivity" > < Button android:text = "登录" android:layout_width = "match_parent" android:layout_height = "wrap_content" android:onClick = "loginClick" android:id = "@+id/button2" /> </ LinearLayout > |
MainActivity.java
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package com.toprs.waitingpractice; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void loginClick(View v){ Intent intent = new Intent(); intent.setClass(MainActivity. this ,WaitingActivity. class ); startActivity(intent); } } |
接下来是弹出的新Activity,新的Activity及其布局:
waiting_activity.xml
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<? xml version = "1.0" encoding = "utf-8" ?> < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tools = "http://schemas.android.com/tools" android:id = "@+id/activity_main" 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" android:orientation = "vertical" tools:context = "com.toprs.waitingpractice.MainActivity" > < Button android:text = "登录" android:layout_width = "match_parent" android:layout_height = "wrap_content" android:onClick = "loginClick" android:id = "@+id/button2" /> </ LinearLayout > |
WaitingActivity.java
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package com.tow.waitingpractice; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.widget.Toast; /** * Created by 39867 on 2017/4/18. */ public class WaitingActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.loading_activity); new Handler().postDelayed( new Runnable() { @Override public void run() { WaitingActivity. this .finish(); Toast.makeText(WaitingActivity. this , "登录成功" , Toast.LENGTH_SHORT).show(); } }, 2000 ); } } |
OK,运行一下试试吧。
希望本文所述对大家Android程序设计有所帮助。
原文链接:https://blog.csdn.net/wangtaocsdn/article/details/70990789