如何检查GPS接收器的现状如何？ [英] How can I check the current status of the GPS receiver?

问题描述

我如何检查GPS接收器的现状如何？我已经检查了 LocationListener的 <一个href="http://developer.android.com/reference/android/location/LocationListener.html#onStatusChanged%28java.lang.String,%20int,%20android.os.Bundle%29"><$c$c>onStatusChanged方法，但不知何故，似乎不工作，或者只是错误的可能性。

How can I check the current status of the GPS receiver? I already checked the LocationListener onStatusChanged method but somehow it seems that is not working, or just the wrong possibility.

基本上，我只需要知道，如果在屏幕顶部的GPS图标闪烁（无实际修复）或固体（修补程序可）。

Basically I just need to know if the GPS icon at the top of the screen is blinking (no actual fix) or solid (fix is available).

推荐答案

首先，我的Speed​​View，一个GPS测速仪为Android的开发者，所以你可以相信我，当我说，我们想尽一切可能的解决方案此问题，都具有相同的阴性结果。让我们开始重申什么行不通：

First of all, I'm a developer of SpeedView, a GPS speedometer for Android, so you can trust me when I say that we tried every possible solution to this problem, all with the same negative result. Let's start by reiterating what doesn't work:

1. onStatusChanged（）不会被调用的埃克莱尔和升级Froyo。它被调用的1.6虽然。
2. 在简单计算，当然所有可用的卫星的，没用的。
3. 检查是否有任何卫星的usedInFix返回true（）是不是也很有帮助。该系统显然失去了修复，但仍继续报告，但是也有一些在以前的几个SATS。

所以，唯一可行的解​​决方案，我们有，而且一个我们实际上在我们的应用程序中使用，如下。比方说，我们有这样一个实现了GpsStatus.Listener简单的类：

So, the only working solution we have, and the one we actually use in our application, is the following. Let's say we have this simple class that implements the GpsStatus.Listener:

private class MyGPSListener implements GpsStatus.Listener {
    public void onGpsStatusChanged(int event) {
        switch (event) {
            case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
                if (mLastLocation != null)
                    isGPSFix = (SystemClock.elapsedRealtime() - mLastLocationMillis) < 3000;

                if (isGPSFix) { // A fix has been acquired.
                    // Do something.
                } else { // The fix has been lost.
                    // Do something.
                }

                break;
            case GpsStatus.GPS_EVENT_FIRST_FIX:
                // Do something.
                isGPSFix = true;

                break;
        }
    }
}

好了，现在在onLocationChanged（），你应该添加以下内容：

OK, now in onLocationChanged() you should add the following:

@Override
public void onLocationChanged(Location location) {
    if (location == null) return;

    mLastLocationMillis = SystemClock.elapsedRealtime();

    // Do something.

    mLastLocation = location;
}

就是这样。基本上，这是它所有的行：

And that's it. Basically, this is the line that does it all:

isGPSFix = (SystemClock.elapsedRealtime() - mLastLocationMillis) < 3000;

您可以调整课程的毫秒数，但我会建议设置它周围3-5秒。

You can tweak the milliseconds value of course, but I would suggest to set it around 3-5 seconds.

这实际工作，虽然我还没有看到源$ C ​​$ C，它实现了标准的GPS图标，这是接近复制其行为。它甚至可以超越它大声笑。希望这可以帮助别人。

This actually works and though I haven't seen the source code that implements the standard GPS icon, this comes close to replicating its behavior. It could even outdo it lol. Hope this helps someone.

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