我想繪製許多地址之間的直線路徑作爲代碼給出.....但如果我嘗試縮放映射ConcurrentModificationException發生, plz help me .. ..我爲Android很新.....使用捕獲的定時器任務添加路徑覆蓋使用ConcurrentModificationException縮放
//this is the methode to draw path
public void draw_path(View view) {
if(timer!=null)
timer.cancel();
timerpath = new Timer();
timerpath.scheduleAtFixedRate(new TimerTask(){
int i=0;
@Override
public void run() {
// TODO Auto-generated method stub
List<Overlay> mapOverlays = mapView.getOverlays();
if(i<replaydata.length-2){
GeoPoint point=new GeoPoint((int) (Float.parseFloat(replaydata[i].split("~")[0]) * 1E6),(int) (Float.parseFloat(replaydata[i].split("~")[1])* 1E6));
GeoPoint point2=new GeoPoint((int) (Float.parseFloat(replaydata[i+1].split("~")[0]) * 1E6),(int) (Float.parseFloat(replaydata[i+1].split("~")[1])* 1E6));
mapOverlays.add(new PathOverlay(point2, point));
mapView.postInvalidate();
i=i+1;
}
}
}, 50, 500);
}
//this is the PathOverlay Class
package com.suneeltectonics.tracking;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.Projection;
public class PathOverlay extends Overlay {
private GeoPoint gp1;
private GeoPoint gp2;
public PathOverlay(GeoPoint gp1, GeoPoint gp2) {
this.gp1 = gp1;
this.gp2 = gp2;
}
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
long when) {
// TODO Auto-generated method stub
Projection projection = mapView.getProjection();
if (shadow == false) {
Paint paint = new Paint();
paint.setAntiAlias(true);
Point point = new Point();
projection.toPixels(gp1, point);
paint.setColor(Color.RED);
Point point2 = new Point();
projection.toPixels(gp2, point2);
paint.setStrokeWidth(6);
canvas.drawLine((float) point.x, (float) point.y, (float) point2.x,
(float) point2.y, paint);
}
return super.draw(canvas, mapView, shadow, when);
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
// TODO Auto-generated method stub
super.draw(canvas, mapView, shadow);
}
}
//this is the crash log
07-26 17:42:30.850: WARN/dalvikvm(2173): threadid=1: thread exiting with uncaught exception (group=0x400207d8)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): FATAL EXCEPTION: main
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): java.util.ConcurrentModificationException
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:573)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:44)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at com.google.android.maps.MapView.onDraw(MapView.java:494)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.View.draw(View.java:6740)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.View.draw(View.java:6743)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-26 17:42:30.870: ERROR/AndroidRuntime(2173): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-26 17:42:30.870:ERROR/AndroidRuntime(2173):在android.view.ViewGroup.drawChild(ViewGroup.java:1638 ) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):在android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):在android.view.View.draw(View.java:6743) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):在android.widget.FrameLayout.draw(FrameLayout.java:352) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):在com.android.internal.policy.impl.PhoneWindow $ DecorView.draw(PhoneWindow.java:1842) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):at android.view.ViewRoot.draw(ViewRoot。的java:1407) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):在android.view.ViewRoot.performTraversals(ViewRoot.java:1163) 07-26 17:42:30.870:ERROR/AndroidRuntime( 2173):at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):at android.os.Handler.dispatchMessage(Handler.java:99) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):at android.os.Looper.loop(Looper.java:123) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):at android.app.ActivityThread.main(ActivityThread.java:4633) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):at java.lang.reflect.Method.invokeNative(本機方法) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):在java.lang.reflect.Method.invoke(Method.java:521) 07- 26 17:42:30.870:ERROR/AndroidRuntime(2173):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:891) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173 ):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:649) 07-26 17:42:30.870:ERROR/AndroidRuntime(2173):at dalvik.system.NativeStart.main(Native Method) 07-26 17:42:30.920:WARN/ActivityManager(150):強制整理活動com.suneeltectonics.tracking/.ViewReplay
在一些崩潰日誌將.. – Abhinava 2012-07-26 12:02:46
發表您的logcat :) – 2012-07-26 12:14:23
日誌貓編輯.... – Suneel 2012-07-26 12:19:53