MapActivity - 宽度和高度必须是＆GT; 0 [英] MapActivity - width and height must be > 0
问题描述
我创建使用mapActivity和MapView的一个应用程序，并遇到奇怪的消息：结果
E / AndroidRuntime（4276）：java.lang.IllegalArgumentException异常：宽度和高度必须> 0
这消息并不总是出现。我backtraced它显示了有关情况，并发现了这一点：
1），如果它已经很长一段时间，因为我接触到的应用程序，然后运行它，崩溃遗嘱显示，注意，如果撞车后我重新打开应用程序，然后有一次否崩溃。
2）如果我删除memrey（RAM），然后在我运行应用程序会崩溃。
3）如果我跑dibugg模式，然后我从来没有遇到死机...
从我的角度来看我觉得Android的还不misured但相关的东西崩溃仍试图显示它。
我还是不碰的MapView MISURE参数，所以我为什么要永远得到此崩溃？
反正，我不知道该怎么办，因为debugg模式不能真的帮助在这里。
我会显示我的onCreate（）位置：
/ **************方法**** *************************************
@覆盖
公共无效的onCreate（捆绑savedInstanceState）{ super.onCreate（savedInstanceState）;
requestWindowFeature（Window.FEATURE_NO_TITLE）; //摆脱了窗口的标题栏，注：我们之前我们称之为做到这一点的setContentView（）
//getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); //这条线被用于删除在窗口的最上栏（一个与时间等） 的setContentView（R.layout.create_map）;
mMapView =（图形页面）findViewById（R.id.mapview）;
moveDotBtn =（按钮）findViewById（R.id.movedot）;
finishBuildBtn =（按钮）findViewById（R.id.finish）; mapController = mMapView.getController（）;
mMapOverlays = mMapView.getOverlays（）;
mMapView.setBuiltInZoomControls（真）;
mMapView.setSatellite（假）;
mMapView.setStreetView（假）; WHEREAMI =新MyCustomLocationOverlay（这一点，mMapView，mapController）;
。mMapView.getOverlays（）加（WHEREAMI）;
//mMapView.postInvalidate（）; //无需调用覆盖where_m_i将不会显示。 sensor_mgr =（的SensorManager）getSystemService（Context.SENSOR_SERVICE）; //激活罗盘
传感器= sensor_mgr.getDefaultSensor（Sensor.TYPE_ORIENTATION）; //激活指南针，和方向 电源管理=（电源管理）getSystemService（Context.POWER_SERVICE）; //使始终，从不看
激活锁定= powerManager.newWakeLock（PowerManager.FULL_WAKE_LOCK，我的锁）; locMgr =（的LocationManager）getSystemService（Context.LOCATION_SERVICE）;
lastLocation = NULL;
敏感的T =新暴躁（）;
mMapOverlays.add（T）; iconItems = getResources（）getStringArray（R.array.icons）。
RES = getResources（）;
mIconOverlays =新IconItemizedOverlay（RES.getDrawable（R.drawable.ic_bench））;
mMapOverlays.add（mIconOverlays）; mapController.setZoom（17）;
}@覆盖
公共无效onResume（）
{
wakeLock.acquire（）; //让你的手机清醒的时刻。 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，传感器，SensorManager.SENSOR_DELAY_NORMAL）;
super.onResume（）;
}
您应该做onWindowFocusChanged更改，因为你不是在那之前获分配的屏幕高度/宽度。
@覆盖
公共无效onWindowFocusChanged（布尔hasFocus）{
如果（hasFocus）{
setOverlay（）; //你的code应该来这里
}
}
super.onWindowFocusChanged（hasFocus）;
}
i created an app using mapActivity and MapView and encounter the wierd message:
" E/AndroidRuntime(4276): java.lang.IllegalArgumentException: width and height must be > 0 "
that message is not always shows up. I backtraced the situation it shows up and found out this:
1) If it's been long time since i touch the app and then run it, the crash wills show up, note that if after the crash i reopen the app then there is NO crash again.
2) if I delete the memrey (RAM) then after i run the app it will crash.
3)if I run dibugg mode then i never encounter the crash...
from my point of view i think the crash related to something that Android did not yet misured but still trying to display it. still i do not touch the mapview misure parameters so why should i ever get this crash? anyways, i have no idea what to do since the debugg mode can't realy help here. i will display my onCreate() here:
/******************************** 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();
}
You should do your changes in onWindowFocusChanged since you are not alloted screen height/width before that.
@Override
public void onWindowFocusChanged(boolean hasFocus) {
if (hasFocus) {
setOverlay(); //Your code should come here
}
}
super.onWindowFocusChanged(hasFocus);
}
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