使用Android提供的模拟任意地理位置，报java.lang.IllegalArgumentException: Incomplete location object异常的解决方法

使用Android提供的模拟任意地理位置的接口，执行如下方法时，会报异常：

    Location localLocation = getLoc(LocationManager.GPS_PROVIDER);
    mLocationManager.setTestProviderLocation(LocationManager.GPS_PROVIDER,
            localLocation);

 

12-10 14:54:24.497: W/System.err(27548): java.lang.IllegalArgumentException: Incomplete location object, missing timestamp or accuracy? Location[gps 22.546054,114.025974 acc=0 et=?!? alt=0.0 vel=0.0 bear=0.0]
12-10 14:54:24.497: W/System.err(27548):  at android.location.LocationManager.setTestProviderLocation(LocationManager.java:1218)
12-10 14:54:24.497: W/System.err(27548):  at com.zhao3546.MockLocationServicePro$1.run(MockLocationServicePro.java:55)
12-10 14:54:24.497: W/System.err(27548):  at android.os.Handler.handleCallback(Handler.java:725)
12-10 14:54:24.497: W/System.err(27548):  at android.os.Handler.dispatchMessage(Handler.java:92)
12-10 14:54:24.497: W/System.err(27548):  at android.os.Looper.loop(Looper.java:137)
12-10 14:54:24.497: W/System.err(27548):  at android.app.ActivityThread.main(ActivityThread.java:5106)
12-10 14:54:24.497: W/System.err(27548):  at java.lang.reflect.Method.invokeNative(Native Method)
12-10 14:54:24.497: W/System.err(27548):  at java.lang.reflect.Method.invoke(Method.java:511)
12-10 14:54:24.497: W/System.err(27548):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
12-10 14:54:24.500: W/System.err(27548):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
12-10 14:54:24.500: W/System.err(27548):  at dalvik.system.NativeStart.main(Native Method)

 

这个问题可以通过两个方法解决。

方法一：

主要是这句，location.setElapsedRealtimeNanos(SystemClock.elapsedRealtimeNanos());

    @SuppressLint("NewApi")
    private Location getLoc(String provider)
    {
        Location location = new Location(provider);
        location.setLatitude(lat);
        location.setLongitude(lng);
        location.setAltitude(altitude);
        location.setBearing(bearing);
        location.setSpeed(speed);
        location.setAccuracy(accuracy);
        location.setTime(System.currentTimeMillis());
        location.setElapsedRealtimeNanos(SystemClock.elapsedRealtimeNanos());
        return location;
    }

方法二，加上下面的反射调用：

    try
    {
        Method method = Location.class.getMethod("makeComplete");
        if (method != null)
        {
            method.invoke(localLocation);
        }
    }
    catch (NoSuchMethodException e)
    {
        e.printStackTrace();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }

 

第二个方法调用的 makeComplete() 方法在Android源码中的实现如下，其实和第一个方法异曲同工，还是第一个方法更优。

    /**
     * Helper to fill incomplete fields.
     *
     * <p>Used to assist in backwards compatibility with
     * Location objects received from applications.
     *
     * @see #isComplete
     * @hide
     */
    public void makeComplete() {
        if (mProvider == null) mProvider = "?";
        if (!mHasAccuracy) {
            mHasAccuracy = true;
            mAccuracy = 100.0f;
        }
        if (mTime == 0) mTime = System.currentTimeMillis();
        if (mElapsedRealtimeNanos == 0) mElapsedRealtimeNanos = SystemClock.elapsedRealtimeNanos();
    }