在Android中限制脱机地图的滚动
我从osmdroid那里得到了这些代码或补丁,我决定寻求你们的帮助,因为我没有足够的知识来结合这些代码来解决我的问题,在离线地图上滚动限制。我在网上搜索,修改了教程。老实说,我试图修改这些代码,但我没有发现任何进展。基本上,我有一张来自mapnik的离线地图和一些覆盖图。我不知道该把这些代码放在哪里。你的想法和修改将是一个很大的帮助,也有助于我继续我的项目,我想你的答案肯定会帮助其他人与我在未来同样的问题。我知道这太过分了。谢谢各位,先生们,愿上帝保佑你们在Android中限制脱机地图的滚动,android,maps,openstreetmap,osmdroid,Android,Maps,Openstreetmap,Osmdroid,我从osmdroid那里得到了这些代码或补丁,我决定寻求你们的帮助,因为我没有足够的知识来结合这些代码来解决我的问题,在离线地图上滚动限制。我在网上搜索,修改了教程。老实说,我试图修改这些代码,但我没有发现任何进展。基本上,我有一张来自mapnik的离线地图和一些覆盖图。我不知道该把这些代码放在哪里。你的想法和修改将是一个很大的帮助,也有助于我继续我的项目,我想你的答案肯定会帮助其他人与我在未来同样的问题。我知道这太过分了。谢谢各位,先生们,愿上帝保佑你们 public void onCreat
public void onCreate(Bundle savedInstanceState) {
...
...
m_mapView = (MapView) findViewById(R.id.mapview);
m_mapView.setTileSource(TileSourceFactory.MAPNIK);
}
第一:边界框
BoundingBoxE6 bbox = new BoundingBoxE6(9.37398, 123.33761, 9.23948, 123.25035);
this.setScrollableAreaLimit(bbox);
第二:LimitScrollToGeographicArea.patch
Index: MapView.java
===================================================================
--- MapView.java (revision 944)
+++ MapView.java (working copy)
@@ -103,6 +103,8 @@
protected MapListener mListener;
+ protected Rect mScrollableAreaLimit;
+
// for speed (avoiding allocations)
private final Matrix mMatrix = new Matrix();
private final MapTileProviderBase mTileProvider;
@@ -505,6 +507,36 @@
mMapOverlay.setUseDataConnection(aMode);
}
+ /**
+ * Set the map to limit it's scrollable view to the specified BoundingBoxE6. Note that, like
+ * North/South bounds limiting, this allows an overscroll of half the screen size. This means
+ * each border can be scrolled to the center of the screen.
+ *
+ * @param boundingBox
+ * A lat/long bounding box to limit scrolling to, or null to remove any scrolling
+ * limitations
+ */
+ public void setScrollableAreaLimit(BoundingBoxE6 boundingBox) {
+ final int worldSize_2 = TileSystem.MapSize(MapViewConstants.MAXIMUM_ZOOMLEVEL) / 2;
+
+ // Clear scrollable area limit if null passed.
+ if (boundingBox == null) {
+ mScrollableAreaLimit = null;
+ return;
+ }
+
+ // Get NW/upper-left
+ final Point upperLeft = TileSystem.LatLongToPixelXY(boundingBox.getLatNorthE6() / 1E6,
+ boundingBox.getLonWestE6() / 1E6, MapViewConstants.MAXIMUM_ZOOMLEVEL, null);
+ upperLeft.offset(-worldSize_2, -worldSize_2);
+
+ // Get SE/lower-right
+ final Point lowerRight = TileSystem.LatLongToPixelXY(boundingBox.getLatSouthE6() / 1E6,
+ boundingBox.getLonEastE6() / 1E6, MapViewConstants.MAXIMUM_ZOOMLEVEL, null);
+ lowerRight.offset(-worldSize_2, -worldSize_2);
+ mScrollableAreaLimit = new Rect(upperLeft.x, upperLeft.y, lowerRight.x, lowerRight.y);
+ }
+
// ===========================================================
// Methods from SuperClass/Interfaces
// ===========================================================
@@ -772,10 +804,26 @@
//I am confused with these codes below, where should I declare it? Int x, y in the onCreate method?
x += (worldSize_2 * 2);
while (x > worldSize_2)
x -= (worldSize_2 * 2);
- while (y < -worldSize_2)
- y += (worldSize_2 * 2);
- while (y > worldSize_2)
- y -= (worldSize_2 * 2);
+ if (y < -worldSize_2)
+ y = -worldSize_2;
+ if (y > worldSize_2)
+ y = worldSize_2;
+
+ if (mScrollableAreaLimit != null) {
+ final int zoomDiff = MapViewConstants.MAXIMUM_ZOOMLEVEL - getZoomLevel();
+ final int minX = mScrollableAreaLimit.left >> zoomDiff;
+ final int minY = mScrollableAreaLimit.top >> zoomDiff;
+ final int maxX = mScrollableAreaLimit.right >> zoomDiff;
+ final int maxY = mScrollableAreaLimit.bottom >> zoomDiff;
+ if (x < minX)
+ x = minX;
+ else if (x > maxX)
+ x = maxX;
+ if (y < minY)
+ y = minY;
+ else if (y > maxY)
+ y = maxY;
+ }
super.scrollTo(x, y);
// do callback on listener
索引:MapView.java
===================================================================
---MapView.java(修订版944)
+++MapView.java(工作副本)
@@ -103,6 +103,8 @@
受保护的映射侦听器;
+受保护的Rect MSCROLLABLE区域限制;
+
//速度(避免分配)
私有最终矩阵mMatrix=新矩阵();
私有最终MapTileProviderBase mTileProvider;
@@ -505,6 +507,36 @@
mMapOverlay.setUseDataConnection(aMode);
}
+ /**
+*将地图设置为将其可滚动视图限制为指定的边界框6。注意,比如
+*北/南边界限制,允许屏幕大小一半的过卷。这意味着
+*每个边框都可以滚动到屏幕中央。
+ *
+*@param边界框
+*用于限制滚动的横向/纵向边界框,或用于删除任何滚动的null
+*限制
+ */
+公共无效设置CrollableRealimit(边界框6边界框){
+final int worldSize_2=TileSystem.MapSize(MapViewConstants.MAXIMUM_ZOOMLEVEL)/2;
+
+//如果通过null,则清除可滚动区域限制。
+如果(boundingBox==null){
+mScrollableAreaLimit=null;
+返回;
+ }
+
+//向西北方向/左上角
+最后一点左上=TileSystem.LatLongToPixelXY(boundingBox.getLatNorthE6()/1E6,
+boundingBox.GetLonWest6()/1E6,MapViewConstants.MAXIMUM\u ZOOMLEVEL,null);
+左上角。偏移量(-worldSize_2,-worldSize_2);
+
+//获取SE/右下角
+终点lowerRight=TileSystem.LatLongToPixelXY(boundingBox.getLatSouthE6()/1E6,
+boundingBox.GetLonEast6()/1E6,MapViewConstants.MAXIMUM\u ZOOMLEVEL,null);
+右下角偏移量(-worldSize_2,-worldSize_2);
+mScrollableAreaLimit=新矩形(左上角.x,左上角.y,右下角.x,右下角.y);
+ }
+
// ===========================================================
//来自超类/接口的方法
// ===========================================================
@@ -772,10 +804,26 @@
//我对下面的代码感到困惑,我应该在哪里声明?onCreate方法中的Int x,y?
x+=(世界大小2*2);
而(x>世界大小2)
x-=(世界规模2*2);
-而(y<-世界尺寸2)
-y+=(世界大小2*2);
-而(y>worldSize_2)
-y-=(世界规模2*2);
+如果(y<-世界尺寸2)
+y=-世界大小_2;
+如果(y>worldSize_2)
+y=世界尺寸_2;
+
+如果(mScrollableAreaLimit!=null){
+final int zoomDiff=MapViewConstants.max_ZOOMLEVEL-getZoomLevel();
+final int minX=mScrollableAreaLimit.left>>zoomDiff;
+final int minY=mScrollableAreaLimit.top>>zoomDiff;
+final int maxX=mScrollableAreaLimit.right>>zoomDiff;
+final int maxY=mScrollableAreaLimit.bottom>>zoomDiff;
+if(xmaxX)
+x=最大x;
+if(ymaxY),则为else
+y=最大值;
+ }
super.scrollTo(x,y);
//对侦听器执行回调
另一个:
scrollToMethod
public void scrollTo(int x, int y) {
int curZoomLevel = mZoomLevel;
final int worldSize_2 = TileSystem.MapSize(curZoomLevel) / 2;
Log.v("HELP", "Scrolling to X=" + x + " Y=" + y + " ZL=" + curZoomLevel + " - WW="+worldSize_2);
while (x < -worldSize_2)
x += (worldSize_2 * 2);
while (x > worldSize_2)
x -= (worldSize_2 * 2);
if (y < -worldSize_2)
y = -worldSize_2;
if (y > worldSize_2)
y = worldSize_2;
if (mScrollableAreaLimit != null) {
int targetZoomLevel = getZoomLevel();
final int zoomDiff = MapViewConstants.MAXIMUM_ZOOMLEVEL - targetZoomLevel;
//final int zoomDiff = MapViewConstants.MAXIMUM_ZOOMLEVEL - mZoomLevel;
final int minX = mScrollableAreaLimit.left >> zoomDiff;
final int minY = mScrollableAreaLimit.top >> zoomDiff;
final int maxX = mScrollableAreaLimit.right >> zoomDiff;
final int maxY = mScrollableAreaLimit.bottom >> zoomDiff;
Log.v("HELP", "Limit: minX=" + minX + " maxX=" + maxX + " minY=" + minY + " maxY=" + maxY + " ZL=" + curZoomLevel + " ZLTarget="+ targetZoomLevel + " ZD="+zoomDiff);
if (x < minX) {
Log.v("HELP", "!!! X=" + x + " minX=" + minX + " CORRECTION:" + (minX-x));
x = minX;
} else if (x > maxX) {
Log.v("HELP", "!!! X=" + x + " maxX=" + maxX + " CORRECTION:" + (maxX-x));
x = maxX;
}
if (y < minY) {
Log.v("HELP", "!!! Y=" + y + " minY=" + minY + " CORRECTION:" + (minY-y));
y = minY;
} else if (y > maxY) {
Log.v("HELP", "!!! Y=" + y + " maxY=" + maxY + " CORRECTION:" + (maxY-y));
y = maxY;
}
}
super.scrollTo(x, y);
// do callback on listener
if (mListener != null) {
final ScrollEvent event = new ScrollEvent(this, x, y);
mListener.onScroll(event);
}
}
scrollToMethod
公共无效滚动到(整数x,整数y){
int curZoomLevel=mZoomLevel;
最终int worldSize_2=TileSystem.MapSize(curZoomLevel)/2;
Log.v(“帮助”,“滚动到X=“+X+”Y=“+Y+”ZL=“+curZoomLevel+”-WW=“+worldSize_2”);
而(x<-世界尺寸2)
x+=(世界大小2*2);
而(x>世界大小2)
x-=(世界规模2*2);
如果(y<-世界尺寸2)
y=-世界大小_2;
如果(y>worldSize_2)
y=世界尺寸_2;
如果(mScrollableAreaLimit!=null){
int targetZoomLevel=getZoomLevel();
final int zoomDiff=MapViewConstants.MAXIMUM_ZOOMLEVEL-targetZoomLevel;
//final int zoomDiff=MapViewConstants.MAXIMUM_ZOOMLEVEL-mZoomLevel;
final int minX=mScrollableAreaLimit.left>>zoomDiff;
final int minY=mScrollableAreaLimit.top>>zoomDiff;
final int maxX=mScrollableAreaLimit.right>>zoomDiff;
final int maxY=mScrollableAreaLimit.bottom>>zoomDiff;
Log.v(“帮助”,“限制:minX=“+minX+”maxX=“+maxX+”minY=“+minY+”maxY=“+maxY+”ZL=“+curZoomLevel+”ZLTarget=“+targetZoomLevel+”ZD=“+zoomDiff”);
if(xmaxX){
Log.v(“帮助”,“!!!X=“+X+”maxX=“+maxX+”更正:”+(maxX-X));
x=最大x;
}
if(ymaxY),则为else{
对数v(
svn checkout http://osmdroid.googlecode.com/svn/branches/release_3_0_5
click on Import...
select General -> Existing Projects into Workspace
click Next
click Browse...
select the checked out projects' directories
osmdroid-android (import as a java project)
OSMMapTilePackager (import as a java project)
OpenStreetMapViewer (mport as an android project)
click OK
click Finish
BoundingBoxE6 bbox = new BoundingBoxE6(limit north, limit east, limit south, limit west);
mapView.setScrollableAreaLimit(bbox);