我正在使用谷歌地图精简模式版本，其中我在联想K50a40上绘制多边形线和标记我收到以下错误
**Non-fatal Exception: java.lang.ArrayIndexOutOfBoundsException: length=42; index=42**
at maps.ah.k.a(Unknown Source:4000)
at maps.ah.k.a(Unknown Source)
at maps.ah.k.a(Unknown Source)
at maps.ah.i.a(Unknown Source)
at maps.ah.d.onDraw(Unknown Source)
at android.view.View.draw(View.java:16457)
at android.view.View.buildDrawingCacheImpl(View.java:15722)
at android.view.View.buildDrawingCache(View.java:15576)
at android.view.View.draw(View.java:16204)
at android.view.ViewGroup.drawChild(ViewGroup.java:3746)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3536)
at android.view.View.updateDisplayListIfDirty(View.java:15402)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3730)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3710)
at android.view.View.updateDisplayListIfDirty(View.java:15361)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:286)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:292)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:327)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:3024)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2828)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2440)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1325)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6741)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:912)
at android.view.Choreographer.doCallbacks(Choreographer.java:714)
at android.view.Choreographer.doFrame(Choreographer.java:649)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:898)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5769)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
及以下是我在谷歌地图上绘制路线的逻辑
public static void drawRouteIntoMap(List<? extends MapHelper> position, final GoogleMap googleMap , final boolean removeMarker) {
/*List<MapHelper> position = new ArrayList<MapHelper>();
for (int i = lastPosition; i < maps.size(); i++) {
position.add(maps.get(i));
}*/
if (position.size() > 0 && Validator.isNotNull(googleMap)) {
// googleMap.clear();
final List<? extends MapHelper> tempList=new ArrayList<>(position);
if(tempList.size()!=pointList.size()) {
tempList.removeAll(pointList);
}
List<PolylineOptions> polylineOptionses = new ArrayList<PolylineOptions>();
PolylineOptions option = null;
Boolean lastPause = null;
for (MapHelper map : tempList) {
if (map.isPause()) {
if (Validator.isNull(lastPause) || !lastPause) {
option = new PolylineOptions().width(5).color(Color.rgb(255, 0, 155)).geodesic(true);
polylineOptionses.add(option);
}
option.add(new LatLng(map.getLatitude(), map.getLongitude()));
} else {
if (Validator.isNull(lastPause) || lastPause) {
option = new PolylineOptions().width(5).color(Color.rgb(0, 179, 253)).geodesic(true);
polylineOptionses.add(option);
}
option.add(new LatLng(map.getLatitude(), map.getLongitude()));
}
lastPause = map.isPause();
}
for (PolylineOptions options : polylineOptionses) {
googleMap.addPolyline(options);
}
if(Validator.isNotNull(option)) {
List<LatLng> points = option.getPoints();
final LatLngBounds.Builder mapBounds = new LatLngBounds.Builder();
for (LatLng latLng : points) {
mapBounds.include(latLng);
}
googleMap.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() {
@Override
public void onMapLoaded() {
if(removeMarker) {
if (Validator.isNotNull(endMarker)) {
startMarker.remove();
endMarker.remove();
}
}
LatLng startPoint = new LatLng(tempList.get(0).getLatitude(), tempList.get(0).getLongitude());
Marker marker1=googleMap.addMarker(new MarkerOptions().position(startPoint).title("start").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));
LatLng endPoint = new LatLng(tempList.get(tempList.size() - 1).getLatitude(), tempList.get(tempList.size() - 1).getLongitude());
Marker marker2=googleMap.addMarker(new MarkerOptions().position(endPoint).title("finish").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
googleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(mapBounds.build(), 10));
googleMap.animateCamera(CameraUpdateFactory.newLatLngBounds(mapBounds.build(), 10));
googleMap.moveCamera(CameraUpdateFactory.zoomOut());
startMarker=marker1;
endMarker=marker2;
}
});
pointList = position;
}
}
}
我在其中进行测试的设备只发生在lenovo k50a40型号中我无法弄清楚实际原因是否有任何帮助。
答案 0 :(得分：3)
通过查看异常，一切都表明您正在错误地遍历数组（或列表）。
检查主要信息
java.lang.ArrayIndexOutOfBoundsException：length = 42;指数= 42
弄清楚接下来会发生什么，这更加棘手，主要是因为我们没有任何关于代码的信息：
at maps.ah.k.a(Unknown Source:4000)
at maps.ah.k.a(Unknown Source)
at maps.ah.k.a(Unknown Source)
at maps.ah.i.a(Unknown Source)
不同的Android设备具有不同的软件基础和硬件基础（取决于制造它们的公司），因此可以预期在某些点上会看到不同的行为。
因此，即使其他设备可以处理非致命异常，联想K50a40似乎也无法做到。或者它甚至可能是联想系统设计不正确，没有办法知道。
你几乎无能为力。 我的解决方案是帮助您找到路径：
forEach并强制执行常规for (int i = 0; i < maps.size(); i++)循环，并监控i的值。这就是说，有一些我不能从你的代码中得到的东西。
if (map.isPause()) {
if (Validator.isNull(lastPause) || !lastPause) {
option = new PolylineOptions().width(5).color(Color.rgb(255, 0, 155)).geodesic(true);
polylineOptionses.add(option);
}
option.add(new LatLng(map.getLatitude(), map.getLongitude()));
} else {
if (Validator.isNull(lastPause) || lastPause) {
option = new PolylineOptions().width(5).color(Color.rgb(0, 179, 253)).geodesic(true);
polylineOptionses.add(option);
}
option.add(new LatLng(map.getLatitude(), map.getLongitude()));
}
如果map.isPause()返回true并且Validator.isNull(lastPause) || !lastPause返回false，会发生什么？
如果我理解正确，您将在空对象上运行option.add(new LatLng(map.getLatitude(), map.getLongitude()));。
这将导致Null异常。
你能给出一些不是pointList变量的上下文吗？
我知道这可能不是你所希望的，但我仍然希望它会有所帮助。