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Android 用PopupWindow实现加载等待界面

程序员文章站 2022-05-31 15:59:13
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转载请标明出处:http://blog.csdn.net/wangtaocsdn/article/details/70983877

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:

用Activity实现加载等待界面

首先看效果:

Android 用PopupWindow实现加载等待界面

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:

<?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:

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:

<?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!!