限制滚动的离线地图，在Android中离线、地图、Android
2023-09-05 11:14:04
作者：流年~轻描淡写的伤
我得到了这些片codeS或osmdroid补丁，我决定找你帮忙球员，因为我没有足够的知识来组合这些codeS上拿出一个解决方案我的问题，在一个离线地图滚动限制。我搜索整个网络，并修改教程。老实说，我试图修改C $ CS这些$，但我还没有发现任何进展。基本上我有Mapnik的离线地图，和一些重叠。我不知道在哪里可以适当地将这些集codeS。你的想法和修改将是一个很大的帮助，也有助于我保持我的项目中去，我想你的答案一定会帮助其他有同样问题，因为煤矿的未来。我知道这是要多。感谢您的先生们的宝贵时间，上帝保佑。
公共无效的onCreate（包savedInstanceState）{
...
...
m_mapView =（图形页面）findViewById（R.id.mapview）;
m_mapView.setTileSource（TileSourceFactory.MAPNIK）;
}
第一：BoundingBox的
BoundingBoxE6 BBOX =新BoundingBoxE6（9.37398，123.33761，9.23948，123.25035）;
this.setScrollableAreaLimit（BBOX）;
二：LimitScrollToGeographicArea.patch
索引：MapView.java
================================================== =================
--- MapView.java（修订版944）
+++ MapView.java（工作拷贝）
@@ -103,6 +103,8 @@
保护MapListener mListener;
+保护的矩形mScrollableAreaLimit;
+
//速度（避免分配）
私人最终矩阵mMatrix =新的Matrix（）;
私人最终MapTileProviderBase mTileProvider;
@@ -505,6 +507,36 @@
mMapOverlay.setUseDataConnection（AMODE）;
}
+ / **
+ *设置地图来限制它的滚动视图到指定BoundingBoxE6。需要注意的是，像
+ *北/南边界限制，这使得一半的屏幕大小的overscroll。意即
+ *每个边界可以滚动到屏幕的中心。
+ *
+ * @参数boundingBox的
+ *纬度/经度边框限制滚动，或者为null，以消除任何滚动
+ *限制
+ * /
+公共无效setScrollableAreaLimit（BoundingBoxE6 boundingBox的）{
+最终诠释worldSize_2 = TileSystem.MapSize（MapViewConstants.MAXIMUM_ZOOMLEVEL）/ 2;
+
如果空过去了+ //清除滚动区域限制。
+如果（boundingBox的== NULL）{
+ mScrollableAreaLimit = NULL;
+返回;
+}
+
+ //获取NW /左上角
+最后一点upperLeft = TileSystem.LatLongToPixelXY（boundingBox.getLatNorthE6（）/ 1E6，
+ boundingBox.getLonWestE6（）/ 1E6，MapViewConstants.MAXIMUM_ZOOMLEVEL，NULL）;
+ upperLeft.offset（-worldSize_2，-worldSize_2）;
+
+ //获取SE /右下
+最后一点lowerRight = TileSystem.LatLongToPixelXY（boundingBox.getLatSouthE6（）/ 1E6，
+ boundingBox.getLonEastE6（）/ 1E6，MapViewConstants.MAXIMUM_ZOOMLEVEL，NULL）;
+ lowerRight.offset（-worldSize_2，-worldSize_2）;
+ mScrollableAreaLimit =新的矩形（upperLeft.x，upperLeft.y，lowerRight.x，lowerRight.y）;
+}
+
// ================================================ ===========
从父类/接口//方法
// ================================================ ===========
@@ -772,10 +804,26 @@
//我很困惑下面这些codeS，我应该在哪里申报呢？诠释的x，y在onCreate方法？
X + =（worldSize_2 * 2）;
而（X＆GT; worldSize_2）
x - =（worldSize_2 * 2）;
- 而（Y＆LT; -worldSize_2）
- Y + =（worldSize_2 * 2）;
- 而（Y＆GT; worldSize_2）
- Y - =（worldSize_2 * 2）;
+如果（Y＆LT; -worldSize_2）
+ Y = -worldSize_2;
+如果（Y＆GT; worldSize_2）
+ Y = worldSize_2;
+
+如果（mScrollableAreaLimit！= NULL）{
+最终诠释zoomDiff = MapViewConstants.MAXIMUM_ZOOMLEVEL - getZoomLevel（）;
+最终诠释其minX = mScrollableAreaLimit.left＆GT;＆GT; zoomDiff;
+最终诠释MINY = mScrollableAreaLimit.top＆GT;＆GT; zoomDiff;
+最终诠释MAXX = mScrollableAreaLimit.right＆GT;＆GT; zoomDiff;
+最终诠释MAXY = mScrollableAreaLimit.bottom＆GT;＆GT; zoomDiff;
+如果（X＆LT;其minX）
+ X =其minX;
+否则，如果（X＆GT; MAXX）
+ X = MAXX;
+如果（Y＆LT; MINY）
+ Y = MINY;
+否则，如果（Y＆GT; MAXY）
+ Y = MAXY;
+}
super.scrollTo（X，Y）;
//做侦听器回调
还有一句：
scrollToMethod
公共无效scrollTo（INT X，int y）对{
INT curZoomLevel = mZoomLevel;
最终诠释worldSize_2 = TileSystem.MapSize（curZoomLevel）/ 2;
Log.v（帮助，滚动到X =+ X +Y =+ Y +ZL =+ curZoomLevel + - WW =+ worldSize_2）;
而（X＆LT; -worldSize_2）
X + =（worldSize_2 * 2）;
而（X＆GT; worldSize_2）
x - =（worldSize_2 * 2）;
如果（Y＆LT; -worldSize_2）
Y = -worldSize_2;
如果（Y＆GT; worldSize_2）
Y = worldSize_2;
如果（mScrollableAreaLimit！= NULL）{
INT targetZoomLevel = getZoomLevel（）;
最终诠释zoomDiff = MapViewConstants.MAXIMUM_ZOOMLEVEL - targetZoomLevel;
//最终诠释zoomDiff = MapViewConstants.MAXIMUM_ZOOMLEVEL - mZoomLevel;
最终诠释其minX = mScrollableAreaLimit.left＆GT;＆GT; zoomDiff;
最终诠释MINY = mScrollableAreaLimit.top＆GT;＆GT; zoomDiff;
最终诠释MAXX = mScrollableAreaLimit.right＆GT;＆GT; zoomDiff;
最终诠释MAXY = mScrollableAreaLimit.bottom＆GT;＆GT; zoomDiff;
Log.v（帮助，限制：其minX =+其minX +MAXX =+ MAXX +MINY =+ MINY +MAXY =+ MAXY +ZL =+ curZoomLevel +ZLTarget =+ targetZoomLevel +ZD =+ zoomDiff）;
如果（X＆LT;其minX）{
Log.v（帮助，!!! X =+ X +其minX =+其minX +更正：+（其minX-X））;
X =其minX;
}否则如果（X＆GT; MAXX）{
Log.v（帮助，!!! X =+ X +MAXX =+ MAXX +更正：+（MAXX-X））;
X = MAXX;
}
如果（Y＆LT; MINY）{
Log.v（帮助，!!! Y =+ Y +MINY =+ MINY +更正：+（MINY-Y））;
Y = MINY;
}否则如果（Y＆GT; MAXY）{
Log.v（帮助，!!! Y =+ Y +MAXY =+ MAXY +更正：+（MAXY-Y））;
Y = MAXY;
}
}
super.scrollTo（X，Y）;
//做侦听器回调
如果（mListener！= NULL）{
最终表示ScrollEvent事件=新表示ScrollEvent（此，X，Y）;
mListener.onScroll（事件）;
}
}
解决方案
首先在终端上使用这个命令：
svn签HTTP：//osmdroid.google$c$c.com/svn/branches/release_3_0_5
这将下载一个稳定版本
然后按照这个导入û下载的文件夹中的内容：
在Eclipse中，在包装区域单击鼠标右键，并选择以下：
点击导入...
选择General - ＆GT;现有项目到工作区
点击下一步
点击浏览...
选择签出项目的目录
osmdroid-机器人（进口作为一个Java项目）
OSMMapTilePackager（进口作为一个Java项目）
OpenStreetMapViewer（mport作为一个Android项目）
单击确定
单击Finish
现在，打开这个的Java文件 - >
osmdroid-的Android / SRC /组织/ osmdroid /视图/ MapView.java
现在，在这个规定patch文件，修改MapView.java（加
code +的地方，删除code的地方 - ）
同时修改 computeScroll（）在MapView.java作为陈述的这里
现在，用这个修改后的.java文件，U需要创建一个新的jar 文件ü可以在项目中包含 这是一个循序渐进的过程创建的jar
添加这个新创建的jar文件到你的项目的构建路径，你 读准备使用您的修改后的jar
现在在您的活动类中使用这样的：
BoundingBoxE6 BBOX =新BoundingBoxE6（限华北，华东限制，限制 南，西限制）; mapView.setScrollableAreaLimit（BBOX）;
I got these piece of codes or patches from osmdroid, and I decided to ask for your help guys because i don't have the enough knowledge to combine these codes to come up with on a solution on my problem, Scrolling limit on an offline map. I searched across the web, and modified tutorials. Honestly I tried to modify these codes but i have not found any progress. Basically I have an offline map from mapnik, and a few overlays. I don't know where to properly place these set of codes. Your ideas and modification will be a great help and also helps me keep going with my project and I guess your answers will definitely help others with the same problem as mine in the future. I know this is to much. Thank you sirs for your time, and God Bless.
public void onCreate(Bundle savedInstanceState) {
...
...
m_mapView = (MapView) findViewById(R.id.mapview);
m_mapView.setTileSource(TileSourceFactory.MAPNIK);
}
First: BoundingBox
BoundingBoxE6 bbox = new BoundingBoxE6(9.37398, 123.33761, 9.23948, 123.25035);
this.setScrollableAreaLimit(bbox);
Second: 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
Another one:
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);
}
}
解决方案
First of all use this command on your terminal:
svn checkout http://osmdroid.googlecode.com/svn/branches/release_3_0_5
It will download a stable version
Then follow this to import contents of the folder u downloaded:
In Eclipse, right-click on the Package area, and select the following:
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
Now open this java file--> osmdroid-android/src/org/osmdroid/view/MapView.java Now as stated in this patch file, modify MapView.java ( add code wherever + , remove code wherever -) Also modify
computeScroll() in MapView.java as stated here
Now, to use this modified .java file, u need to create a new jar file that u can include in your project Here is a step by step process to create jar
Add this newly created jar file to your project's build path and you r ready to use your modified jar
Now use this in your activity class:
BoundingBoxE6 bbox = new BoundingBoxE6(limit north, limit east, limit south, limit west); mapView.setScrollableAreaLimit(bbox);
相关推荐
猜您喜欢
精彩图集
