android沉浸式状态栏，透明状态栏，白底黑字状态栏

全透明状态栏（根据xml最外层布局颜色改变）

 protected void setStatusBarFullTransparent() {
        if (Build.VERSION.SDK_INT >= 21) {//21表示5.0
            Window window = getWindow();
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.TRANSPARENT);
        } else if (Build.VERSION.SDK_INT >= 19) {//19表示4.4
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            //虚拟键盘也透明
            //getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        }
    }

白底黑子（有些界面顶部是白色的，如果还是透明会发生看不到当前时间）

 /**
     * 6.0以上设置白的黑字状态栏
     */
    protected void setDarkTheme() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            getWindow().getDecorView()
                    .setSystemUiVisibility(
                            View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            getWindow().setStatusBarColor(getResources().getColor(R.color.line_color));
        }
    }