Android——requestWindowFeature

requestWindowFeature可以设置的值有：
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：无标题
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

示例代码：

public class WindowFeatureDemoActivity extends Activity {  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        // requestWindowFeature();的取值  
        // 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：无标题  
        // 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  
        // ========================FEATURE_INDETERMINATE_PROGRESS：不确定的进度  
//        showFEATURE_INDETERMINATE_PROGRESS();  
//        // =====================FEATURE_CUSTOM_TITLE         
//        showFEATURE_CUSTOM_TITLE();  
//        // ======================== FEATURE_LEFT_ICON：标题栏左侧的图标  
//        showFEATURE_LEFT_ICON();  
//        // ======================FEATURE_NO_TITLE  
//        showFEATURE_NO_TITLE();     
//         =================================FEATURE_PROGRESS  
        showFEATURE_PROGRESS();  
    }  
    private void showFEATURE_INDETERMINATE_PROGRESS() {  
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);  
        setContentView(R.layout.main);  
        getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, R.layout.progress);  
        // 必须得加上否则显示不出效果 可以通过这个在以后设置显示或隐藏  
        setProgressBarIndeterminateVisibility(true);  
    }  
    private void showFEATURE_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  
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);  
        setContentView(R.layout.main);  
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.customtitle);  
    }  
    private void showFEATURE_LEFT_ICON()  
    {  
         requestWindowFeature(Window.FEATURE_LEFT_ICON);  
         setContentView(R.layout.main);  
         getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,  
         R.drawable.icon);  
    }  
    private void showFEATURE_NO_TITLE()  
    {  
         requestWindowFeature(Window.FEATURE_NO_TITLE);  
         setContentView(R.layout.main);  
         // 加上这句设置为全屏 不加则只隐藏title  
         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  
         WindowManager.LayoutParams.FLAG_FULLSCREEN);  
    }  
    private void showFEATURE_PROGRESS()  
    {  
        requestWindowFeature(Window.FEATURE_PROGRESS);  
        setProgressBarVisibility(true);  
        setContentView(R.layout.main);  
        setTitle("");  
        getWindow().setFeatureInt(Window.FEATURE_PROGRESS, Window.PROGRESS_VISIBILITY_ON);  
        // 通过线程来改变ProgressBar的值  
        new Thread(new Runnable() {  
            public void run() {  
                for (int i = 0; i < 10; i++) {  
                    try {  
                        Thread.sleep(1000);  
                        Message m = new Message();  
                        m.what = (i + 1) * 20;  
                        WindowFeatureDemoActivity.this.myMessageHandler.sendMessage(m);  
                    } catch (Exception e) {  
                        e.printStackTrace();  
                    }  
                }  
            }  
        }).start();  
    }  
    Handler myMessageHandler = new Handler() {  
        // @Override  
        public void handleMessage(Message msg) {  
            // 设置标题栏中前景的一个进度条进度值  
            setProgress(100 * msg.what);  
            // 设置标题栏中后面的一个进度条进度值  
            setSecondaryProgress(100 * msg.what + 10);  
            super.handleMessage(msg);  
        }  
    };  
}