我创建使用mapActivity和MapView的一个应用程序并遇到怪异消息:
“E/AndroidRuntime(4276):java.lang.IllegalArgumentException异常:宽度和高度必须> 0”MapActivity - 宽度和高度必须> 0
该消息并不总是显示出来。我回溯了它出现的情况,发现这个:
1)如果我已经很长时间触摸应用程序并运行它,崩溃将显示,请注意,如果在崩溃后我重新打开应用程序,然后有一次NO崩溃。
2)如果我删除memrey(RAM),然后在我运行应用程序时就会死机。
3)如果我跑dibugg模式的话,我从来没有遇到死机...
从我的角度来看,我认为有关的东西坠毁的Android还不misured但仍试图显示它。 可是我还是不碰的MapView MISURE参数,所以我为什么要感到这样会崩溃吗? 反正,我不知道该怎么做,因为debugg模式不能真的帮助这里。 我会展示我的onCreate()在这里:
/******************************** Methods *****************************************
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE); //get rid of the title bar of the window, NOTE: we have to do this BEFORE we call "setContentView()"
//getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); //this line is use to remove the uppermost bar in the window (the one with the time , etc.)
setContentView(R.layout.create_map);
mMapView = (MapView)findViewById(R.id.mapview);
moveDotBtn = (Button)findViewById(R.id.movedot);
finishBuildBtn = (Button)findViewById(R.id.finish);
mapController = mMapView.getController();
mMapOverlays = mMapView.getOverlays();
mMapView.setBuiltInZoomControls(true);
mMapView.setSatellite(false);
mMapView.setStreetView(false);
whereAmI = new MyCustomLocationOverlay(this, mMapView,mapController);
mMapView.getOverlays().add(whereAmI);
//mMapView.postInvalidate(); //without that call the overlay "where_m_i" will not show.
sensor_mgr = (SensorManager) getSystemService(Context.SENSOR_SERVICE); //activate for compass
sensor = sensor_mgr.getDefaultSensor(Sensor.TYPE_ORIENTATION); //activate for compass, and orientation
powerManager =(PowerManager)getSystemService(Context.POWER_SERVICE); //to make always on, and never looked
wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Lock");
locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
lastLocation = null;
Touchy t = new Touchy();
mMapOverlays.add(t);
iconItems = getResources().getStringArray(R.array.icons);
RES = getResources();
mIconOverlays = new IconItemizedOverlay(RES.getDrawable(R.drawable.ic_bench));
mMapOverlays.add(mIconOverlays);
mapController.setZoom(17);
}
@Override
public void onResume()
{
wakeLock.acquire(); //make your phone awake at all times.
locMgr.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0 , whereAmI);
locMgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0 , whereAmI);
whereAmI.enableMyLocation();
whereAmI.enableCompass();
findLastKnownLocation();
sensor_mgr.registerListener(sensorEventListener , sensor ,SensorManager.SENSOR_DELAY_NORMAL);
super.onResume();
}