Question

我在Unity中使用这个C＃代码来访问Java类是.aar lib：

 AndroidJavaClass ajc;
    private AndroidJavaObject ajo;
    // Use this for initialization
    void Start () {
        ajc = new AndroidJavaClass("com.example.pc.superpoweredsdk.SuperPoweredPlayerWrapper");
        ajo = ajc.Get<AndroidJavaObject>("currentActivity");
    }

但我在android上的logcat中收到此错误：

AndroidJavaException：java.lang.NoSuchFieldError：no＆＃34; Ljava / lang / Object;＆＃34; field＆＃34; currentActivity＆＃34;在课堂＆＃34; Lcom / example / pc / superpoweredsdk / SuperPoweredPlayerWrapper;＆＃34;或者它的超类 07-01 12：31：08.640 1467 1485 I Unity：java.lang.NoSuchFieldError：no＆＃34; Ljava / lang / Object;＆＃34; field＆＃34; currentActivity＆＃34;在课堂＆＃34; Lcom / example / pc / superpoweredsdk / SuperPoweredPlayerWrapper;＆＃34;或其超类

这是我试图调用的Java类和函数：

public class SuperPoweredPlayerWrapper {
    public SuperPoweredPlayerWrapper(Context context) {
        int sampleRate = 44100;
        int bufferSize = 512;
        AssetFileDescriptor fd = context.getResources().openRawResourceFd(R.raw.lycka);
        int fileOffset = (int)fd.getStartOffset();
        int fileLength = (int)fd.getLength();
        try {
            fd.getParcelFileDescriptor().close();
        } catch (IOException e) {
            android.util.Log.d("", "Close error.");
        }
        SuperpoweredPlayer(sampleRate, bufferSize, context.getPackageResourcePath(), fileOffset, fileLength);
    }

    private native void SuperpoweredPlayer(int sampleRate, int bufferSize, String apkPath, int fileOffset, int fileLength);
    public native void playPause(boolean play);
    public native void setTempo(double value);

    static {
        System.loadLibrary("SuperpoweredExample");
    }
}

如何使用Unity中的context参数调用此类构造函数？

Answer 1

currentActivity 是 com.unity3d.player.UnityPlayer的成员。

因此，此代码将获取上下文

AndroidJavaClass ajc;
AndroidJavaObject ajo,context;
ajc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        ajo = ajc.Get<AndroidJavaObject>("currentActivity");
context = ajo.Call<AndroidJavaObject>("getApplicationContext");

然后你用上下文做任何你想做的事。

调用构造函数：

AndroidJavaObject yourClassObject = new AndroidJavaObject("com.example.pc.superpoweredsdk.SuperPoweredPlayerWrapper",new object[]{context});

在尝试调用类构造函数

1 个答案: