如下代码在某些机器上运行时,会直接导致应用崩溃退出
LocationManager locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location = locMgr.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
updateWithNewLocation(location);
locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 10, locationListener);
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{……}:
java.lang.IllegalArgumentException: provider=network
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: provider=network
at android.os.Parcel.readException(Parcel.java:1331)
at android.os.Parcel.readException(Parcel.java:1281)
at android.location.ILocationManager$Stub$Proxy.requestLocationUpdates(ILocationManager.java:646)
at android.location.LocationManager._requestLocationUpdates(LocationManager.java:589)
at android.location.LocationManager.requestLocationUpdates(LocationManager.java:453)
at com.example.location.LocationActivity.onCreate(LocationActivity.java:26)
at android.app.Activity.performCreate(Activity.java:4465)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
……
http://stackoverflow.com/questions/11490031/caused-by-java-lang-illegalargumentexception-provider-network
信息参考地址(点此打开链接)
如上log中,红色代码已经标出重要的log信息是这两行行
Caused by: java.lang.IllegalArgumentException: provider=network
……
at android.location.LocationManager.requestLocationUpdates(LocationManager.java:453)
……
由此 我们可以定位到源码中
locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 10, locationListener);
这一行出了问题,说是参数不对
然而这个错误并不是每部真机都会出现的
这就意味着那些会报这个错误的手机也许是没有 LocationManager.NETWORK_PROVIDER 这个定位功能
我们用如下代码打印一下可以找到该手机目前有效的provider
List list = locMgr.getAllProviders();
for(String c : list) {
System.out.println("LocationManager provider:" + c);
}
要避免这个问题很简单,只要循环provider的list,发现有network就执行定位部分的代码
如果没有的话,要么换gps要么就算了不定位了
如果连gps也没有的话
还是别给他定位好了
如下是我的处理方法,笨笨的选择如果这部手机没有network的provider,我就不给他定位了
locMgr = (LocationManager)s_instance.getSystemService(Context.LOCATION_SERVICE);
List list = locMgr.getAllProviders();
boolean bfind = false;
for(String c : list) {
System.out.println("LocationManager provider:" + c);
if (c.equals(LocationManager.NETWORK_PROVIDER)){
bfind = true;
break;
}
}
if (bfind) {
Location location = locMgr.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
updateWithNewLocation(location);
locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 10, locationListener);
}