React native 沉浸式状态栏解决方案

博客上有很多的沉浸式解决方案，不过都是针对原生activity的方案。在react native中却不适用。
首先我们看一下RN中的StatusBar中的属性：
translucent bool ：指定状态栏是否透明。设置为true时，应用会在状态栏之下绘制（即所谓“沉浸式”——被状态栏遮住一部分）。常和带有半透明背景色的状态栏搭配使用。
js中调用的是setTranslucent（bool）
源码如下：` @ReactMethod
public void setTranslucent(final boolean translucent) {
final Activity activity = getCurrentActivity();
if (activity == null) {
FLog.w(ReactConstants.TAG, “StatusBarModule: Ignored status bar change, current activity is null.”);
return;
}

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {  UiThreadUtil.runOnUiThread(    new GuardedRunnable(getReactApplicationContext()) {      @TargetApi(Build.VERSION_CODES.LOLLIPOP)      @Override      public void runGuarded() {        // If the status bar is translucent hook into the window insets calculations        // and consume all the top insets so no padding will be added under the status bar.        View decorView = activity.getWindow().getDecorView();        if (translucent) {          decorView.setOnApplyWindowInsetsListener(new View.OnApplyWindowInsetsListener() {            @Override            public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {              WindowInsets defaultInsets = v.onApplyWindowInsets(insets);              return defaultInsets.replaceSystemWindowInsets(                defaultInsets.getSystemWindowInsetLeft(),                0,                defaultInsets.getSystemWindowInsetRight(),                defaultInsets.getSystemWindowInsetBottom());            }          });        } else {          decorView.setOnApplyWindowInsetsListener(null);        }        ViewCompat.requestApplyInsets(decorView);      }    });}

}`
所以我的做法就是参考源码：

 @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {            View decorView = this.getWindow().getDecorView();            decorView.setOnApplyWindowInsetsListener(new View.OnApplyWindowInsetsListener() {                @Override                public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {                    WindowInsets defaultInsets = v.onApplyWindowInsets(insets);                    return defaultInsets.replaceSystemWindowInsets(                            defaultInsets.getSystemWindowInsetLeft(),                            0,                            defaultInsets.getSystemWindowInsetRight(),                            defaultInsets.getSystemWindowInsetBottom());                }            });            ViewCompat.requestApplyInsets(decorView);        }    }

在js代码其实可以直接调用setTranslucent，但是后来在项目中发现，Android sdk 6.0以上，打成release包会出现问题，首次进入app的时候都会出现，状态栏没有设置成功。然后再次进入项目，就会成功，所以我仿照源码动态的来设置。
但是这个是没有改变状态栏背景色，如果你需要改变背景色，也可以参考设置背景色的源码来设置。