本文实例讲述了Android 开发使用PopupWindow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Activity实现方法请见我的另一篇博客:
首先看效果:
用PopupWindow实现此功能还是比较简单的,首先我们写一个布局,只有一个登录按钮,用于触发等待界面:
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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.myapplication.MainActivity" > < Button android:text = "登录" android:layout_width = "match_parent" android:layout_height = "wrap_content" android:onClick = "loginClick" android:id = "@+id/button2" /> </ LinearLayout > |
然后为登录按钮添加监听事件:
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package com.wang.myapplication; import ... public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void loginClick(View v){ final PopupWindow popupWindow = new PopupWindow(); popupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); popupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); popupWindow.setFocusable( true ); View view = LayoutInflater.from( this ).inflate(R.layout.popup, null ); popupWindow.setContentView(view); popupWindow.showAtLocation(getWindow().getDecorView(), Gravity.CENTER, 0 , 0 ); new Handler().postDelayed( new Runnable() { @Override public void run() { Toast.makeText(MainActivity. this , "登录成功" , Toast.LENGTH_SHORT).show(); popupWindow.dismiss(); } }, 2000 ); } } |
其中弹出的PopupWindow需要一个布局,也就是简单放入一个ProgressBar:
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<? xml version = "1.0" encoding = "utf-8" ?> < RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android" android:layout_width = "200dp" android:layout_height = "200dp" > < ProgressBar android:id = "@+id/progressBar4" style = "?android:attr/progressBarStyle" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_centerInParent = "true" /> </ RelativeLayout > |
大功告成,运行一下即可!!
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/70983877