透明状态栏

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);

}