如何在用java创建的布局中创建地图片段(GoogleMap)?
我试图在用java创建的布局中创建一个映射(GoogleMap)。我不明白为什么在尝试从LinearLayout获取ID时会出现与imageView相关的错误 这是我的密码:如何在用java创建的布局中创建地图片段(GoogleMap)?,java,android,google-maps,layout,Java,Android,Google Maps,Layout,我试图在用java创建的布局中创建一个映射(GoogleMap)。我不明白为什么在尝试从LinearLayout获取ID时会出现与imageView相关的错误 这是我的密码: LinearLayout mapLayout = new LinearLayout(customToursActivity); mapLayout.setId(rootView.generateViewId()); mapLayout.setLayoutParams(new
LinearLayout mapLayout = new LinearLayout(customToursActivity);
mapLayout.setId(rootView.generateViewId());
mapLayout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0, 0.5f));
layout.addView(mapLayout);
FragmentManager fm = getChildFragmentManager();
SupportMapFragment supportMapFragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(mapLayout.getId(), supportMapFragment).commit();
这是我得到的日志:
01-22 15:04:28.034 19341-19341/abff.googlemapsappteste E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: abff.googlemapsappteste, PID: 19341
java.lang.ClassCastException: android.widget.ImageView cannot be cast to android.view.ViewGroup
at android.support.v4.app.BackStackRecord.configureTransitions(BackStackRecord.java:1134)
at android.support.v4.app.BackStackRecord.beginTransition(BackStackRecord.java:1041)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:661)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.Fragment.performStart(Fragment.java:1810)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:989)
at android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(FragmentManager.java:846)
at android.support.v4.app.FragmentManagerImpl.startPendingDeferredFragments(FragmentManager.java:1162)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1518)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:490)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1105)
at android.support.v4.view.ViewPager.populate(ViewPager.java:951)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1473)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.support.v7.internal.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:124)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:444)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2618)
at android.view.View.measure(View.java:17637)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2019)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1177)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1383)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1065)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5901)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:211)
at android.app.ActivityThread.main(ActivityThread.java:5389)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815)
01-22 15:04:28.034 19341-19341/abff.googlemapsappteste E/AndroidRuntime﹕ 致命异常:主
流程:abff.googlemapsappteste,PID:19341
java.lang.ClassCastException:android.widget.ImageView无法强制转换为android.view.ViewGroup
位于android.support.v4.app.BackStackRecord.configureTransitions(BackStackRecord.java:1134)
位于android.support.v4.app.BackStackRecord.beginTransition(BackStackRecord.java:1041)
位于android.support.v4.app.BackStackRecord.run(BackStackRecord.java:661)
位于android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
位于android.support.v4.app.Fragment.performStart(Fragment.java:1810)
位于android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:989)
在android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(FragmentManager.java:846)上
位于android.support.v4.app.FragmentManagerImpl.startPendingDeferredFragments(FragmentManager.java:1162)
位于android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1518)
位于android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:490)
在android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)上
在android.support.v4.view.ViewPager.populate(ViewPager.java:1105)
在android.support.v4.view.ViewPager.populate(ViewPager.java:951)中
在android.support.v4.view.ViewPager.onMeasure上(ViewPager.java:1473)
在android.view.view.measure(view.java:17637)
位于android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
位于android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
位于android.support.v7.internal.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:124)
在android.view.view.measure(view.java:17637)
位于android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
位于android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:444)
在android.view.view.measure(view.java:17637)
位于android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
位于android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
在android.view.view.measure(view.java:17637)
位于android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
位于android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
位于android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
位于android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
在android.view.view.measure(view.java:17637)
位于android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
位于android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
在com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure上(PhoneWindow.java:2618)
在android.view.view.measure(view.java:17637)
在android.view.ViewRootImpl.performMeasure上(ViewRootImpl.java:2019)
在android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1177)
在android.view.ViewRootImpl.performTraversals上(ViewRootImpl.java:1383)
位于android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1065)
在android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5901)
在android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
位于android.view.Choreographer.doCallbacks(Choreographer.java:580)
位于android.view.Choreographer.doFrame(Choreographer.java:550)
在android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)中
位于android.os.Handler.handleCallback(Handler.java:739)
位于android.os.Handler.dispatchMessage(Handler.java:95)
位于android.os.Looper.loop(Looper.java:211)
位于android.app.ActivityThread.main(ActivityThread.java:5389)
位于java.lang.reflect.Method.invoke(本机方法)
位于java.lang.reflect.Method.invoke(Method.java:372)
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020)上
位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815)
我有完全相同的问题,但需要不同的修复。和您一样,我有一个自定义视图,该视图以编程方式创建SupportMapFragment。但在我的例子中,此视图可能位于RecyclerView项中,因此使用链接到的方法生成新Id(在while循环中使用findViewById查找下一个可用Id)不起作用,因为视图每次都获得相同的Id,因为它在自己的子视图层次结构中调用findViewById。相同的Id是不好的,因为当我在自定义视图中使用片段管理器进行替换时,每次只替换第一个出现的项,即第一个RecyclerView项 我在Google maps lib中发现了一个bug,它似乎在内部使用了一些生成的ID,这些ID与View.GenerateView()中生成的第一个可用ID冲突,这让我尝试了以下方法,解决了这个问题:
int newViewId = -1;
int loopCount = 0;
// I tried starting at 70, actual number used internally in Google maps may be lower
while (loopCount < 70) {
loopCount++;
if (ApiLevelHelper.SameOrNewer(17)) {
// using https://gist.github.com/omegasoft7/fdf7225a5b2955a1aba8
newViewId = ViewHelper.generateViewId();
} else {
newViewId = View.generateViewId();
}
}
FrameLayout mapFrameLayout = new FrameLayout(getContext());
mapFrameLayout.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT));
mapFrameLayout.setId(newViewId);
FrameLayout pnlMapFragment = (FrameLayout)findViewById(R.id.pnlMapFragment);
pnlMapFragment.addView(mapFrameLayout);
((AppCompatActivity) getContext()).getSupportFragmentManager().beginTransaction()
.replace(mapFrameLayout.getId(), this.mapFragment)
.commit();
this.mapFragment.getMapAsync(this);
intnewviewid=-1;
int loopCount=0;
//我试着从70岁开始,谷歌地图内部使用的实际数字可能更低
而(循环计数<70){
loopCount++;
if(ApiLevelHelper.sameornower(17)){
//使用https://gist.github.com/omegasoft7/fdf7225a5b2955a1aba8
newViewId=ViewHelper.generate