status bar使用

一、设置状态栏
1、This lesson describes how to dim the system bars (that is, the status and the navigation bars) on Android 4.0 (API level 14) and higher. Android does not provide a built-in way to dim the system bars on earlier versions.
**覆盖状态栏

        setContentView(R.layout.activity_main);        View decorView = getWindow().getDecorView();        int uiOptions = View.SYSTEM_UI_FLAG_LOW_PROFILE;//This is for use in games, book readers, video players, or any other        decorView.setSystemUiVisibility(uiOptions);

看一下状态栏对比

显示状态栏 ：切换的试下显示

  View decorView = getActivity().getWindow().getDecorView();// Calling setSystemUiVisibility() with a value of 0 clears// all flags.  decorView.setSystemUiVisibility(0);

参考： https://developer.android.com/training/system-ui/dim.html

二、Hiding the Status Bar
Hide the Status Bar on Android 4.0 and Lower

public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // If the Android version is lower than Jellybean, use this call to hide        // the status bar.        if (Build.VERSION.SDK_INT < 16) {            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                    WindowManager.LayoutParams.FLAG_FULLSCREEN);        }        setContentView(R.layout.activity_main);    }    ...}

在2.3的模拟器上的效果

还有一种方式 设置style，一跑就崩溃

Hide the Status Bar on Android 4.1 and Higher

View decorView = getWindow().getDecorView();// Hide the status bar.int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;decorView.setSystemUiVisibility(uiOptions);// Remember that you should never show the action bar if the// status bar is hidden, so hide that too if necessary.ActionBar actionBar = getActionBar();actionBar.hide();