android中状态栏变透明的实现方法:

 protected void setStatusBarTransparent() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            View decorView = getWindow().getDecorView();
            decorView.setOnApplyWindowInsetsListener((v, insets) -> {
                WindowInsets defaultInsets = v.onApplyWindowInsets(insets);
                return defaultInsets.replaceSystemWindowInsets(
                        defaultInsets.getSystemWindowInsetLeft(),
                        0,
                        defaultInsets.getSystemWindowInsetRight(),
                        defaultInsets.getSystemWindowInsetBottom());
            });
            ViewCompat.requestApplyInsets(decorView);
            getWindow().setStatusBarColor(ContextCompat.getColor(this, android.R.color.transparent));
        }
    }