AppCompat DayNight主题在Android 6.0上不起作用?

问题描述：

我正在使用Android Support Library 23.2

在Android 5.1上，它运行良好.

On Android 5.1 it works well.

在Android 6.0上，活动看起来像是使用浅色主题，而对话框看起来是使用深色主题.

On Android 6.0, activity looks like using light theme, but dialog looks using dark theme.

我的应用程序类:

public class MyApplication extends Application {
    static {
        AppCompatDelegate.setDefaultNightMode(
                AppCompatDelegate.MODE_NIGHT_YES);
    }
}

我的styles.xml

My styles.xml

<style name="AppTheme" parent="Theme.AppCompat.DayNight">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

<style name="Dialog.Alert" parent="Theme.AppCompat.DayNight.Dialog.Alert"/>

显示对话框的代码:

new AlertDialog.Builder(mContext, R.style.Dialog_Alert)
                .setTitle("Title")
                .setMessage("Message")
                .show();

答

最好的解决方案是使用适当的配置更新上下文.这是我的工作摘要:

The best solution is to update context with proper config. Here is a snippet of what I do:

public Context setupTheme(Context context) {

    Resources res = context.getResources();
    int mode = res.getConfiguration().uiMode;
    switch (getTheme(context)) {
        case DARK:
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
            mode = Configuration.UI_MODE_NIGHT_YES;
            break;
        case LIGHT:
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
            mode = Configuration.UI_MODE_NIGHT_NO;
            break;
        default:
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_AUTO);
            break;
    }

    Configuration config = new Configuration(res.getConfiguration());
    config.uiMode = mode;
    if (Build.VERSION.SDK_INT >= 17) {
        context = context.createConfigurationContext(config);
    } else {
        res.updateConfiguration(config, res.getDisplayMetrics());
    }
    return context;
}

然后像这样在您的应用程序中使用上下文

Then use the context in your Application like so

@Override
protected void attachBaseContext(Context base) {
    Context context = ThemePicker.getInstance().setupTheme(base);
    super.attachBaseContext(context);
}

AppCompat DayNight主题在Android 6.0上不起作用?

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