LocationManager調用requestLocationUpdates 某些手機上打包APK無法運行，導致崩潰的問題

如下代碼在某些機器上運行時，會直接導致應用崩潰退出

	LocationManager locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
	Location location = locMgr.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
	updateWithNewLocation(location);  
	locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 10, locationListener);

崩潰信息中會出現如下log

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.<span style="color:#ff0000;">LocationManager.requestLocationUpdates</span>(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)
	……

PS：本人自己的log信息已丟失，如上log信息參考地址：

http://stackoverflow.com/questions/11490031/caused-by-java-lang-illegalargumentexception-provider-network

信息參考地址(點此打開鏈接)

如上log中，紅色代碼已經標出重要的log信息是這兩行行

Caused by: java.lang.IllegalArgumentException: provider=network

……

at android.location.LocationManager.requestLocationUpdates(LocationManager.java:453)

……

由此 我們可以定位到源碼中

locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 10, locationListener);

這一行出了問題，說是參數不對

然而這個錯誤並不是每部真機都會出現的

這就意味着那些會報這個錯誤的手機也許是沒有 LocationManager.NETWORK_PROVIDER 這個定位功能

我們用如下代碼打印一下可以找到該手機目前有效的provider

	List<String> list = locMgr.getAllProviders();
	for(String c : list) {
		System.out.println("LocationManager provider:" + c);
	}

真機測試，就能從log裏看到，當前手機確實是沒有network這個provider的

要避免這個問題很簡單，只要循環provider的list，發現有network就執行定位部分的代碼

如果沒有的話，要麼換gps要麼就算了不定位了

如果連gps也沒有的話

還是別給他定位好了

如下是我的處理方法，笨笨的選擇如果這部手機沒有network的provider，我就不給他定位了

		locMgr = (LocationManager)s_instance.getSystemService(Context.LOCATION_SERVICE);
		List<String> 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) {
	        <span style="white-space:pre">	</span>Location location = locMgr.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
	        <span style="white-space:pre">	</span>updateWithNewLocation(location);  
	        <span style="white-space:pre">	</span>locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 10, locationListener);
		}