我使用mapActivity和MapView创建了一个应用程序并遇到了奇怪的消息:
“E / AndroidRuntime(4276):java.lang.IllegalArgumentException:width和height必须是> 0”
该消息并不总是显示出来。我回溯了它出现的情况并发现了这个:
1)如果我触摸应用程序并运行它已经很长时间了,崩溃就会显示出来,请注意,如果在崩溃后我重新打开应用程序,那么 NO 再次崩溃。
2)如果我删除了memrey(RAM),那么在我运行应用程序后它会崩溃。
3)如果我运行dibugg模式,那么我从未遇到过崩溃......
从我的角度来看,我认为崩溃与Android尚未发现但仍试图显示它的内容有关。 仍然我不触摸mapview misure参数,所以为什么我应该得到这个崩溃? 无论如何,我不知道该怎么做,因为调试模式不能在这里真正帮助。 我将在这里显示我的onCreate():
/******************************** 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();
}
答案 0 :(得分:0)
我想我得到了答案,但我不确定,只有时间可以告诉像虫子这样的bug。看起来好像我不应该在使用谷歌地图时触摸onCreate上的屏幕,所以如果我想做ZoomIn或setZoom(SOME_NUMBER),那么我应该在onResume()而不是onCreate上进行。希望这会有所帮助,有一天:) BTW: 如果有人知道它是否真的是问题,或者它只是一个临时解决方案,那么我想听听,casue它似乎与我的解决方案一起工作:)
答案 1 :(得分:0)
您应该在onWindowFocusChanged中进行更改,因为在此之前您没有分配屏幕高度/宽度。
@Override
public void onWindowFocusChanged(boolean hasFocus) {
if (hasFocus) {
setOverlay(); //Your code should come here
}
}
super.onWindowFocusChanged(hasFocus);
}