this.requestWindowFeature(Window.FEATURE_NO_TITLE)相关

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

1.DEFAULT_FEATURES：系统默认状态，一般不需要指定

2.FEATURE_CONTEXT_MENU：启用ContextMenu，默认该项已启用，一般无需指定

3.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

4.FEATURE_INDETERMINATE_PROGRESS：不确定的进度

5.FEATURE_LEFT_ICON：标题栏左侧的图标

6.FEATURE_NO_TITLE：没有标题

7.FEATURE_OPTIONS_PANEL：启用“选项面板”功能，默认已启用。

8.FEATURE_PROGRESS：进度指示器功能

9.FEATURE_RIGHT_ICON:标题栏右侧的图标

二、详解

默认显示状态

1.FEATURE_CUSTOM_TITLE详解

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

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);

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>  

2.FEATURE_INDETERMINATE_PROGRESS详解

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);  

<?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>  

3.FEATURE_LEFT_ICON和FEATURE_RIGHT_ICON详解

//111
requestWindowFeature(Window.FEATURE_RIGHT_ICON);
setContentView(R.layout.main);
getWindow().setFeatureDrawableResource(Window.FEATURE_RIGHT_ICON,R.drawable.ic_launcher);  

//222
requestWindowFeature(Window.FEATURE_LEFT_ICON);
setContentView(R.layout.main);
getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,R.drawable.ic_launcher);  

4.FEATURE_NO_TITLE详解

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

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