问题是:现在有两个地图服务地址,地址1和地址2,分别对应两个地图,地图1和地图2,地图1是一张世界地图作为底,地图2是一块区域地图背景是透明的,两个地图的坐标系一样,现在想在一个地图容器里面同时展示这两幅地图,地图2在地图1对应的位置重叠展示;
我都代码如下:
package com.example.supermapimobile2d;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.hardware.SensorManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.WindowManager;
import android.widget.Toast;
import com.supermap.data.Dataset;
import com.supermap.data.Datasets;
import com.supermap.data.Datasource;
import com.supermap.data.DatasourceConnectionInfo;
import com.supermap.data.EngineType;
import com.supermap.data.Environment;
//import android.os.Environment;
import com.supermap.data.Workspace;
import com.supermap.data.WorkspaceConnectionInfo;
import com.supermap.data.WorkspaceType;
import com.supermap.mapping.Layers;
import com.supermap.mapping.Map;
import com.supermap.mapping.MapControl;
import com.supermap.mapping.MapView;
import com.supermap.mapping.view.LayerListView;
public class MainActivity extends AppCompatActivity {
String RootPath = android.os.Environment.getExternalStorageDirectory().getAbsolutePath().toString();
@Override
protected void onCreate(Bundle savedInstanceState) {
requestPermissions();
super.onCreate(savedInstanceState);
MapControl mapControl = null;
MapControl m_mapControl = null;
String rootPath = android.os.Environment.getExternalStorageDirectory().getAbsolutePath();
// Environment.setLicensePath(rootPath + "/SuperMap/license/");
Environment.setLicensePath(android.os.Environment.getExternalStorageDirectory().getAbsolutePath()+"/SuperMap/license/");
// Environment.setWebCacheDirectory(android.os.Environment.getExternalStorageDirectory().getAbsolutePath()+"/SuperMap/WebCache/");
// Environment.setTemporaryPath(android.os.Environment.getExternalStorageDirectory().getAbsolutePath()+"/SuperMap/temp/");
Environment.initialization(this);
//2022-10-18 添加下面一行代码:用内存引擎，openGL引擎在模拟器上不存在,iserver地图可以在模拟器上展示了
Environment.setOpenGLMode(false);
setContentView(R.layout.activity_main);
openMap();
}
private void requestPermissions() { //Android6.0以上设备设置动态权限
if (Build.VERSION.SDK_INT >= 23) {
// 检查是否拥有权限
String[] permissions = {
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.READ_PHONE_STATE,
Manifest.permission.ACCESS_WIFI_STATE,
Manifest.permission.ACCESS_NETWORK_STATE,
Manifest.permission.CHANGE_WIFI_STATE,
};
String permission = null;
int id = 0;
boolean isBreak = false;
int checkCallPhonePermission = 0;
for (int i = 0; i < permissions.length; i++) {
permission = permissions[i];
checkCallPhonePermission = checkSelfPermission(permission);
if (checkCallPhonePermission != PackageManager.PERMISSION_GRANTED) {
requestPermissions(permissions, id);
isBreak = true;
break;
}
}
}
}
private boolean openMap() {
Workspace m_woWorkspace = new Workspace(); // 将地图显示控件与工作空间关联
MapView m_mapView = (MapView) findViewById(R.id.Map_view);
MapControl m_mapControl = m_mapView.getMapControl();
m_mapControl.getMap().setWorkspace(m_woWorkspace);
DatasourceConnectionInfo dsInfo = new DatasourceConnectionInfo();
DatasourceConnectionInfo dsInfo1 = new DatasourceConnectionInfo();
dsInfo.setServer("http://192.168.4.21:8090/iserver/services/map-ChinaAyl/rest/maps/ChinaDark?prjCoordSys={'epsgCode':4326}");
dsInfo1.setServer("http://192.168.4.21:8090/iserver/services/map-ZKGQ/rest/maps/ZKYZT?prjCoordSys={'epsgCode':4326}");
dsInfo.setEngineType(EngineType.Rest);
dsInfo1.setEngineType(EngineType.Rest);
dsInfo.setAlias("ChinaDark");
dsInfo1.setAlias("ZKYZT");
Datasource ds = m_woWorkspace.getDatasources().open(dsInfo);
Datasource ds1 = m_woWorkspace.getDatasources().open(dsInfo1);
if(ds != null){
m_mapControl.getMap().getLayers().add(ds.getDatasets().get(0), true);
m_mapControl.getMap().getLayers().add(ds1.getDatasets().get(0), true);
m_mapControl.getMap().refresh();
}
return true;
}
}
控制台有异常信息:
E/SurfaceHolder: Exception locking surface
java.lang.IllegalArgumentException: Surface was already locked
at android.view.Surface.lockCanvas(Surface.java:308)
at android.view.SurfaceView$4.internalLockCanvas(SurfaceView.java:990)
at android.view.SurfaceView$4.lockCanvas(SurfaceView.java:958)
at com.supermap.mapping.MapControl1.c(MapControl1.java:365)
at com.supermap.mapping.MapControl1.refreshCallback(MapControl1.java:1072)
at com.supermap.mapping.MapControlNative.jni_SetSize(Native Method)
at com.supermap.mapping.MapControl1.a(MapControl1.java:1218)
at com.supermap.mapping.MapControl1.c(MapControl1.java:375)
at com.supermap.mapping.MapControl1$3.surfaceCreated(MapControl1.java:338)
at android.view.SurfaceView.updateWindow(SurfaceView.java:618)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:161)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2205)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6338)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)
at android.view.Choreographer.doCallbacks(Choreographer.java:686)
at android.view.Choreographer.doFrame(Choreographer.java:621)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6176)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:893)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
