java - Android 如何为所有 Activity 设置全局标志

Question

我遇到的问题是，目前每次我开始一个新的 Activity 时，例如:

Intent exchangedetail = new Intent(getActivity(), ExchangeDetail.class);
exchangedetail.putExtra("key", web[+ position]);
getActivity().startActivity(exchangedetail);

我每次都必须像这样设置我的 Light NavBar 和 Status Bar:

//Setup Status Bar and Nav Bar white if supported
View decorView = getWindow().getDecorView();
Window win = getWindow();

if(Build.VERSION.SDK_INT >= 27) {
    decorView.setSystemUiVisibility(FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS |
            View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR |
            View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
}
else if (Build.VERSION.SDK_INT >= 23 && Build.VERSION.SDK_INT < 27) {
    decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
    win.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION,
            WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
}
else {
    win.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,
            WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    win.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION,
            WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
}

有什么方法可以在我的 MainActivity 中设置这个标志，并且新的 Intent/Activity 也使用这个标志，这样我就不必在每次调用新的 Intent 时都设置它们了吗？我认为 style.xml 可以正常工作，但我需要在启动时从我的应用程序中主动设置这些标志。

Answer 1

您可以使用基本 Activity ，然后可以扩展您的每项 Activity

public class BaseActviity extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   //Setup Status Bar and Nav Bar white if supported
    View decorView = getWindow().getDecorView();
    Window win = getWindow();

    if(Build.VERSION.SDK_INT >= 27) {
        decorView.setSystemUiVisibility(FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS |
                View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR |
                View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
    }
    else if (Build.VERSION.SDK_INT >= 23 && Build.VERSION.SDK_INT < 27) {
        decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
        win.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION,
                WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
    }
    else {
        win.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS,
                WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        win.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION,
                WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
    }

}
}

class MainActivty extends BaseActviity{
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}
}