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在我运行我的应用程序的每台 SGS3 设备上崩溃的原因似乎是什么？这是唯一无法运行的设备（操作系统版本为 4.1.2）。我试过：LG 擎天柱一号+黑色、N4、HTC HD2、SGS 1+2..等等...

在清单文件中，我做了：

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="10" />

这些是最相关的行。Manifest.xml（针对我的问题）。

创建方法：

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Getting reference to MapView
        mapView = (MapView) findViewById(R.id.map_view);
        tvLocation = (TextView)findViewById(R.id.tv_location);
        mapView.setKeepScreenOn(true);

        // Setting Zoom Controls on MapView
        mapView.setBuiltInZoomControls(true);
        mapView.setTraffic(true);
        mapView.setSatellite(false);

        ImageButton settings = (ImageButton)findViewById(R.id.settingsButton);
        settings.setOnClickListener(this);

        Button helpme = (Button)findViewById(R.id.helpMeButton);    //find Button and gives a name: 'help'
        ToggleButton mapExchangeToggleButton = (ToggleButton)findViewById(R.id.mapExchangeToggleButton);    
        helpme.setOnClickListener(this);    //register Button as an OnClicklistener
        mapExchangeToggleButton.setOnClickListener(this);

        // Getting LocationManager object from System Service LOCATION_SERVICE
        LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        // Creating a criteria object to retrieve provider
        Criteria criteria = new Criteria();

        // Getting the name of the best provider
        String provider = locationManager.getBestProvider(criteria, true);

        // Getting Current Location
        Location location = locationManager.getLastKnownLocation(provider);

        if(location!=null){
            onLocationChanged(location);
        }

onResume 方法：

public void onResume(){
        super.onResume();

        SharedPreferences pre = getSharedPreferences(PREFS_NAME,MODE_PRIVATE);
        phoneNumber = pre.getString("phone","" );
    }

LogCat 是：

03-05 20:39:49.910: D/dalvikvm(27589): GC_CONCURRENT freed 173K, 9% free 12425K/13511K, paused 3ms+1ms, total 18ms
03-05 20:39:49.910: D/dalvikvm(27589): WAIT_FOR_CONCURRENT_GC blocked 6ms
03-05 20:39:49.910: W/CursorWrapperInner(27589): Cursor finalized without prior close()
03-05 20:39:49.965: D/dalvikvm(27589): GC_FOR_ALLOC freed 6K, 8% free 12814K/13895K, paused 14ms, total 14ms
03-05 20:39:49.990: W/System.err(27589): java.io.IOException: Service not Available
03-05 20:39:49.995: W/System.err(27589):    at android.location.Geocoder.getFromLocation(Geocoder.java:136)
03-05 20:39:49.995: W/System.err(27589):    at in.wptrafficanalyzer.locationingooglemap.MainActivity.onLocationChanged(MainActivity.java:122)
03-05 20:39:49.995: W/System.err(27589):    at in.wptrafficanalyzer.locationingooglemap.MainActivity.onCreate(MainActivity.java:83)
03-05 20:39:49.995: W/System.err(27589):    at android.app.Activity.performCreate(Activity.java:5206)
03-05 20:39:49.995: W/System.err(27589):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
03-05 20:39:49.995: W/System.err(27589):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
03-05 20:39:49.995: W/System.err(27589):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
03-05 20:39:49.995: W/System.err(27589):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
03-05 20:39:49.995: W/System.err(27589):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
03-05 20:39:49.995: W/System.err(27589):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 20:39:49.995: W/System.err(27589):    at android.os.Looper.loop(Looper.java:137)
03-05 20:39:49.995: W/System.err(27589):    at android.app.ActivityThread.main(ActivityThread.java:4898)
03-05 20:39:49.995: W/System.err(27589):    at java.lang.reflect.Method.invokeNative(Native Method)
03-05 20:39:49.995: W/System.err(27589):    at java.lang.reflect.Method.invoke(Method.java:511)
03-05 20:39:49.995: W/System.err(27589):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
03-05 20:39:49.995: W/System.err(27589):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
03-05 20:39:50.000: W/System.err(27589):    at dalvik.system.NativeStart.main(Native Method)
03-05 20:39:50.000: D/AndroidRuntime(27589): Shutting down VM
03-05 20:39:50.000: W/dalvikvm(27589): threadid=1: thread exiting with uncaught exception (group=0x419242a0)
03-05 20:39:50.000: E/AndroidRuntime(27589): FATAL EXCEPTION: main
03-05 20:39:50.000: E/AndroidRuntime(27589): java.lang.RuntimeException: Unable to start activity ComponentInfo{in.wptrafficanalyzer.locationingooglemap/in.wptrafficanalyzer.locationingooglemap.MainActivity}: java.lang.NullPointerException
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.os.Looper.loop(Looper.java:137)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.ActivityThread.main(ActivityThread.java:4898)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at java.lang.reflect.Method.invokeNative(Native Method)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at java.lang.reflect.Method.invoke(Method.java:511)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at dalvik.system.NativeStart.main(Native Method)
03-05 20:39:50.000: E/AndroidRuntime(27589): Caused by: java.lang.NullPointerException
03-05 20:39:50.000: E/AndroidRuntime(27589):    at in.wptrafficanalyzer.locationingooglemap.MainActivity.onLocationChanged(MainActivity.java:128)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at in.wptrafficanalyzer.locationingooglemap.MainActivity.onCreate(MainActivity.java:83)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.Activity.performCreate(Activity.java:5206)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
03-05 20:39:50.000: E/AndroidRuntime(27589):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
03-05 20:39:50.000: E/AndroidRuntime(27589):    ... 11 more

onLocationChanged():

public void onLocationChanged(Location location) {

        double latitude = location.getLatitude();

        double longitude = location.getLongitude();


         );

        Geocoder geocoder;
        List<Address> addresses = null;

        geocoder = new Geocoder(this, Locale.getDefault());
        try {
            addresses = geocoder.getFromLocation(latitude, longitude, 1);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        address = addresses.get(0).getAddressLine(0);
        city = addresses.get(0).getAddressLine(1);
        country = addresses.get(0).getAddressLine(2);

        tvLocation.setText("Street Address: " +  address+ "\nCity: "+city +"\nCountry: " +country);

        GeoPoint point = new GeoPoint((int)(latitude * 1E6), (int)(longitude*1E6));

        MapController mapController = mapView.getController();

        mapController.animateTo(point);

        mapController.setZoom(15);

        mapView.invalidate();

        List<Overlay> mapOverlays = mapView.getOverlays();

        Drawable drawable = this.getResources().getDrawable(R.drawable.cur_position);

        CurrentLocationOverlay currentLocationOverlay = new CurrentLocationOverlay(drawable);

        OverlayItem currentLocation = new OverlayItem(point, "Current Location", "Latitude : " + latitude + ", Longitude:" + longitude);

        currentLocationOverlay.addOverlay(currentLocation);

        mapOverlays.clear();

        mapOverlays.add(currentLocationOverlay);        

    }
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1 回答 1

0

你正在捕捉和打印：

java.io.IOException: Service not Available

这意味着地址永远不会被设置并且为空：

List<Address> addresses = null;

因此，当您尝试访问该列表中的项目时，您可能会收到 NullPointerException：

address = addresses.get(0).getAddressLine(0);

看起来 android.location.Geocoder 在该特定设备上不可用。我会检查诸如权限之类的事情，以及 GPS 是否已打开/启用。

于 2013-10-28T18:19:39.677 回答