将 LibGDX 与 Android 首选项一起使用

2022-01-12 00:00:00 android java libgdx sharedpreferences

我正在尝试将 Andrioid 的首选项系统与 LibGDX 的首选项系统结合使用.他们都使用 SharedPreferences 作为后端，所以我认为他们应该能够一起工作，但是当我尝试在 LibGDX 的首选项中加载数据时，我没有得到任何数据.

I'm trying to use Andrioid's preferences system in conjunction with LibGDX's preferences system. They both use SharedPreferences as a backend, so I figure they should be able to work together, but when I try to load the data in LibGDX's preferences, I don't get any data back.

我的 Androidpreferences.xml 文件(我知道它很短，稍后会有更多内容:P):

My Android preferences.xml file (I know it's short, it'll have much more later :P):

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
    <EditTextPreference 
        android:key="framerate"
        android:title="Set Framerate"
        android:enabled="true"
        android:persistent="true"
        android:defaultValue="25" />
</PreferenceScreen>

这是我的 PreferenceActivity:

Here is my PreferenceActivity:

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;

public class WallpaperSettings extends PreferenceActivity {

    @SuppressLint("NewApi")
    @SuppressWarnings("deprecation")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (Build.VERSION.SDK_INT < 11) {
            addPreferencesFromResource(R.xml.preferences);
        } else {
            getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
        }

    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class MyPreferenceFragment extends PreferenceFragment
    {
        @Override
        public void onCreate(final Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.preferences);
        }
    }
}

当我从 com.badlogic.gdx.Game 的子类调用它时，我使用

When I call it from a subclass of com.badlogic.gdx.Game, I use

Preferences pref = Gdx.app.getPreferences("preferences");
pref.getInteger("framerate");

pref 内的键数为 0.

有人知道如何解决这个问题吗?

Anyone have a clue as to how this might be fixed?

推荐答案

感谢http://www.badlogicgames.com/forum/viewtopic.php?f=11&t=6365#p32981 我能够解决这个问题.

Thanks to http://www.badlogicgames.com/forum/viewtopic.php?f=11&t=6365#p32981 I was able to solve the problem.

请注意，该代码适用于 Android 2.x 和 3.0+.

Just a note, the code works for both Android 2.x and 3.0+.

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;

public class WallpaperSettings extends PreferenceActivity {

    @SuppressLint("NewApi")
    @SuppressWarnings("deprecation")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (Build.VERSION.SDK_INT < 11) {
            addPreferencesFromResource(R.xml.preferences);
        } else {
            getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
        }

    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class MyPreferenceFragment extends PreferenceFragment
    {
        @Override
        public void onCreate(final Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.preferences);
            getPreferenceManager().setSharedPreferencesName("preferences");
            getPreferenceManager().setSharedPreferencesMode(0);
        }
    }
}

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