requestWindowFeature()的应用

向右看齐 2022-07-14 04:21 138阅读 0赞

原文出处：[http://blog.csdn.net/heng615975867/article/details/8735550][http_blog.csdn.net_heng615975867_article_details_8735550]

Android开发中经常会在setContentView(R.layout.main\_activity); 前设置requestWindowFeature(Window.xxx)。作用是需要软件全屏显示、自定义标题（使用按钮等控件）和其他的需求

首先介绍一个重要方法那就是requestWindowFeature(featrueId)，它的功能是启用窗体的扩展特性。参数是Window类中定义的常量。

# 一、枚举常量 #

*  DEFAULT\_FEATURES：系统默认状态，一般不需要指定
 *  FEATURE\_CONTEXT\_MENU：启用ContextMenu，默认该项已启用，一般无需指定
 *  FEATURE\_CUSTOM\_TITLE：自定义标题。当需要自定义标题时必须指定。如：标题是一个按钮时
 *  FEATURE\_INDETERMINATE\_PROGRESS：不确定的进度
 *  FEATURE\_LEFT\_ICON：标题栏左侧的图标
 *  FEATURE\_NO\_TITLE：没有标题
 *  FEATURE\_OPTIONS\_PANEL：启用“选项面板”功能，默认已启用。
 *  FEATURE\_PROGRESS：进度指示器功能
 *  FEATURE\_RIGHT\_ICON:标题栏右侧的图标

# 二、详解 #

默认显示状态

![requestWindowFeature][]

## FEATURE\_CUSTOM\_TITLE详解 ##

this.requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); 
    setContentView(R.layout.main);

![requestWindowFeature][requestWindowFeature 1]

这是因为没有设置Featrue

在上面代码后加：getWindow().setFeatureInt(Window.FEATURE\_CUSTOM\_TITLE, R.layout.title);

![requestWindowFeature][requestWindowFeature 2]

自定义标题完成，它是一个xml文件布局

<?xml version="1.0" encoding="utf-8"?>  
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" >  
    
        <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher" />  
    
        <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:textColor="#000000" android:text="FEATURE_CUSTOM_TITLE" />  
    
    </LinearLayout>

## FEATURE\_INDETERMINATE\_PROGRESS ##

可以用来表示一个进程正在运行

this.requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); 
    setContentView(R.layout.main); 
    getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, R.layout.progress); 
    setProgressBarIndeterminateVisibility(true);

![requestWindowFeature][requestWindowFeature 3]

<?xml version="1.0" encoding="utf-8"?>  
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" >  
    
        <ProgressBar android:id="@+id/progress" style="?android:attr/progressBarStyleSmallTitle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" >  
        </ProgressBar>  
    
    </LinearLayout>

## FEATURE\_LEFT\_ICON和FEATURE\_RIGHT\_ICON ##

requestWindowFeature(Window.FEATURE_RIGHT_ICON);  
    setContentView(R.layout.main);      
    getWindow().setFeatureDrawableResource(Window.FEATURE_RIGHT_ICON,R.drawable.ic_launcher);

requestWindowFeature(Window.FEATURE_LEFT_ICON); 
    setContentView(R.layout.main); 
    getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,R.drawable.ic_launcher);

![requestWindowFeature][requestWindowFeature 4]

## FEATURE\_NO\_TITLE ##

this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
    setContentView(R.layout.main);

![requestWindowFeature][requestWindowFeature 5]

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
         WindowManager.LayoutParams.FLAG_FULLSCREEN);

![requestWindowFeature][requestWindowFeature 6]

[http_blog.csdn.net_heng615975867_article_details_8735550]: http://blog.csdn.net/heng615975867/article/details/8735550
[requestWindowFeature]: /images/20220714/f03bda2617f6471094bdcedb8c4fc6cd.png
[requestWindowFeature 1]: /images/20220714/e85847f54b8f4cb2adf8455af720af22.png
[requestWindowFeature 2]: /images/20220714/d72d12a938934f709226a7b806880369.png
[requestWindowFeature 3]: /images/20220714/5eeb610bc6224fd98830785f5d2ad15a.png
[requestWindowFeature 4]: /images/20220714/768f9c37a9a24d6d807de8f546699ff8.png
[requestWindowFeature 5]: /images/20220714/9dbd5c7c280c4f96a540d8afbaabd57a.png
[requestWindowFeature 6]: /images/20220714/4261b9b9ef704b5092bd112bd86cfe9a.png