当标准设置为高精度时,应用程序崩溃

Question

我正在努力获得最高的定位精度,我从GPS供应商那里学到了这一点.我只需要获得一次位置,所以我不关心对电池寿命的影响.在我的功能代码中,位置似乎在完全不准确(1 + km)到非常准确(10m内)之间交替.在我的应用程序的测试中,我在手机上启用/禁用位置,打开/关闭wifi,打开/关闭数据.这只是为了试验,看看每个如何影响一般的准确性和应用程序.

以下代码是来自位置活动的onCreate方法:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.map_layout);

    mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map_fragment))
            .getMap();
    mMap.setMyLocationEnabled(true);
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    Criteria criteria = new Criteria();

    //criteria.setAccuracy(Criteria.ACCURACY_HIGH);

    provider = locationManager.getBestProvider(criteria, true);

    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();

    // Create the LocationRequest object
    mLocationRequest = LocationRequest.create()
            .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
            .setInterval(2 * 1000)        // 10 seconds, in milliseconds
            .setFastestInterval(1 * 1000); // 1 second, in milliseconds
}

但是,当我添加该criteria.setAccuracy(Criteria.ACCURACY_HIGH);行时,我的应用程序崩溃了.

到底是怎么回事？

编辑:这是logcat错误:

E/AndroidRuntime: FATAL EXCEPTION: main    
E/AndroidRuntime: Process: com.locationget, PID: 16663    
E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.locationget/com.locationget.MapActivity}: java.lang.IllegalArgumentException: accuracy=3    
E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2212)    
E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2271    
E/AndroidRuntime:     at android.app.ActivityThread.access$800(ActivityThread.java:144)    
E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)    
E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:102)    
E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:136)    
E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5146)    
E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)    
E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:515)    
E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)     
E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)    
E/AndroidRuntime:  Caused by: java.lang.IllegalArgumentException: accuracy=3    
E/AndroidRuntime:     at android.location.Criteria.setAccuracy(Criteria.java:223)    
E/AndroidRuntime:     at com.getlocation.MapActivity.onCreate(MapActivity.java:47)    
E/AndroidRuntime:     at android.app.Activity.performCreate(Activity.java:5231)    
E/AndroidRuntime:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)    
E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)    
E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2271    
E/AndroidRuntime:     at android.app.ActivityThread.access$800(ActivityThread.java:144)     
E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)        
E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:102)        
E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:136)        
E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5146)        
E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)     
E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:515)     
E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)       
E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)     
E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method) 

我对android很新,不太确定相关部分是什么.

Answer 1

这一行是真正的错误:

E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.locationget/com.locationget.MapActivity}:java.lang.IllegalArgumentException: accuracy=3

这是我在一些搜索后发现的:

android Criteria有两组独立的精度常数.ACCURACY_FINE和ACCURACY_COARSE用于一般位置,而ACCURACY_LOW,ACCURACY_MEDIUM和ACCURACY_HIGH"可用于水平,高度,速度或轴承精度."

所以在你的情况下,不要使用ACCURACY_HIGH或你会得到一个错误.使用ACCURACY_COARSE或ACCURACY_FINE代替.

Answer 2

使用criteria.setAccuracy(Criteria.ACCURACY_FINE); 而不是criteria.setAccuracy(Criteria.ACCURACY_HIGH);.

标准