java如何在使用CameraUpdate时修复此错误
使用以下命令时出现此错误:
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, 16);
我从其他帖子中看到了我需要使用的内容
addOnGlobalLayoutListener
但我试过了,但似乎无法让它发挥作用
03-11 12:00:18.496 11035-11035/project.sharethefare E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: project.sharethefare, PID: 11035
java.lang.RuntimeException: Unable to start activity ComponentInfo{project.sharethefare/project.sharethefare.Share}: java.lang.ClassCastException: 安卓.support.v4.app.NoSaveStateFrameLayout cannot be cast to 安卓.widget.LinearLayout
at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:2658)
at 安卓.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2725)
at 安卓.app.ActivityThread.access$900(ActivityThread.java:172)
at 安卓.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
at 安卓.os.Handler.dispatchMessage(Handler.java:102)
at 安卓.os.Looper.loop(Looper.java:145)
at 安卓.app.ActivityThread.main(ActivityThread.java:5834)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
Caused by: java.lang.ClassCastException: 安卓.support.v4.app.NoSaveStateFrameLayout cannot be cast to 安卓.widget.LinearLayout
at project.sharethefare.Share.setUpMap(Share.java:105)
at project.sharethefare.Share.setUpMapIfNeeded(Share.java:82)
at project.sharethefare.Share.onCreate(Share.java:53)
at 安卓.app.Activity.performCreate(Activity.java:6221)
at 安卓.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:2611)
at 安卓.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2725)
at 安卓.app.ActivityThread.access$900(ActivityThread.java:172)
at 安卓.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
at 安卓.os.Handler.dispatchMessage(Handler.java:102)
at 安卓.os.Looper.loop(Looper.java:145)
at 安卓.app.ActivityThread.main(ActivityThread.java:5834)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
03-11 12:00:21.816 13207-13207/project.sharethefare E/Zygote﹕ MountEmulatedStorage()
03-11 12:00:21.816 13207-13207/project.sharethefare E/Zygote﹕ v2
我得到的错误代码部分是:
private void setUpMap() {
final List <Marker> markers= new ArrayList<>();
if(alreadyInit==false){
marker = mMap.addMarker(new MarkerOptions().position(new LatLng(home.curLat,home.curLong)).title("Marker"));
markers.add(marker);
alreadyInit=true;
}
matchLocLat = client.getlat();
matchLocLong = client.getlong();
if(alreadyInit==true){
marker = mMap.addMarker(new MarkerOptions().position(new LatLng(matchLocLat, matchLocLong)).title("Marker"));
markers.add(marker);
LinearLayout mapLayout = (LinearLayout)findViewById(R.id.shared_map);
mapLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
LatLngBounds.Builder builder = new LatLngBounds.Builder();
for (Marker marker : markers) {
builder.include(marker.getPosition());
}
LatLngBounds bounds = builder.build();
int padding = 0 ; // offset from edges of the map in pixels
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, 16);
mMap.animateCamera(cu);
}
});
}
我将非常感谢任何帮助和我将回答的任何问题
# 1 楼答案
R.id.shared_map
不是LinearLayout
,因此不能将其转换为LinearLayout
。它与CameraUpdateFactory.newLatLngBounds(bounds, 16)
无关由于
getViewTreeObserver()
是在View
上实现的,一个解决方案就是去掉强制转换,假设R.id.shared_map
真的代表了你想要得到ViewTreeObserver
的任何东西