API18.java

package fr.frazew.virtualgyroscope.hooks.sensorchange;

import android.hardware.Sensor;
import android.util.SparseArray;

import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedHelpers;
import de.robv.android.xposed.callbacks.XC_LoadPackage;
import fr.frazew.virtualgyroscope.VirtualSensorListener;
import fr.frazew.virtualgyroscope.XposedMod;
import fr.frazew.virtualgyroscope.hooks.SensorChange;

public class API18 extends XC_MethodHook {
    private SensorChange mSensorChange;
    private Class SYSTEM_SENSOR_MANAGER;

    public API18(XC_LoadPackage.LoadPackageParam lpparam) {
        super(XC_MethodHook.PRIORITY_HIGHEST);
        this.mSensorChange = new SensorChange();
        SYSTEM_SENSOR_MANAGER = XposedHelpers.findClassIfExists("android.hardware.SystemSensorManager", lpparam.classLoader);
    }

    @Override
    @SuppressWarnings("unchecked")
    protected void beforeHookedMethod(XC_MethodHook.MethodHookParam param) throws Throwable {
        Object listener = XposedHelpers.getObjectField(param.thisObject, "mListener");
        int handle = (int) param.args[0];
        SparseArray<Sensor> sensors = (SparseArray<Sensor>) XposedHelpers.getStaticObjectField(SYSTEM_SENSOR_MANAGER, "sHandleToSensor");
        Sensor s = sensors.get(handle);

        if (listener instanceof VirtualSensorListener) {
            float[] values = this.mSensorChange.handleListener(s, (VirtualSensorListener) listener, ((float[]) param.args[1]).clone(), (int) param.args[2], (long) param.args[3], XposedMod.ACCELEROMETER_RESOLUTION, XposedMod.MAGNETIC_RESOLUTION);
            if (values != null) {
                System.arraycopy(values, 0, param.args[1], 0, values.length);
                param.args[0] = XposedMod.sensorTypetoHandle.get(((VirtualSensorListener) listener).getSensor().getType());
            } else param.setResult(null);
        }
    }
}