ID、标签 null 或父 ID 与 com.google.android.gms.maps.MapFragment 的另一个片段重复 [英] Duplicate ID, tag null, or parent id with another fragment for com.google.android.gms.maps.MapFragment
问题描述
我有一个包含三个选项卡的应用程序.
I have an application with three tabs.
每个选项卡都有自己的布局 .xml 文件.main.xml 有自己的地图片段.它是应用程序首次启动时显示的那个.
Each tab has its own layout .xml file. The main.xml has its own map fragment. It's the one that shows up when the application first launches.
除了我在标签之间切换时，一切都很好.如果我尝试切换回地图片段选项卡，则会收到此错误.切换到其他选项卡并在其他选项卡之间切换效果很好.
Everything works fine except for when I change between tabs. If I try to switch back to the map fragment tab, I get this error. Switching to and between other tabs works just fine.
这里有什么问题?
这是我的主类和我的main.xml，以及我使用的一个相关类(你也会在底部找到错误日志)
This is my main class and my main.xml, as well as a relevant class that I use ( you will also find the error log at the bottom )
主类
package com.nfc.demo;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.widget.Toast;
public class NFCDemoActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
bar.addTab(bar
.newTab()
.setText("Map")
.setTabListener(
new TabListener<MapFragment>(this, "map",
MapFragment.class)));
bar.addTab(bar
.newTab()
.setText("Settings")
.setTabListener(
new TabListener<SettingsFragment>(this, "settings",
SettingsFragment.class)));
bar.addTab(bar
.newTab()
.setText("About")
.setTabListener(
new TabListener<AboutFragment>(this, "about",
AboutFragment.class)));
if (savedInstanceState != null) {
bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
}
// setContentView(R.layout.main);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("tab", getActionBar().getSelectedNavigationIndex());
}
public static class TabListener<T extends Fragment> implements
ActionBar.TabListener {
private final Activity mActivity;
private final String mTag;
private final Class<T> mClass;
private final Bundle mArgs;
private Fragment mFragment;
public TabListener(Activity activity, String tag, Class<T> clz) {
this(activity, tag, clz, null);
}
public TabListener(Activity activity, String tag, Class<T> clz,
Bundle args) {
mActivity = activity;
mTag = tag;
mClass = clz;
mArgs = args;
// Check to see if we already have a fragment for this tab,
// probably from a previously saved state. If so, deactivate
// it, because our initial state is that a tab isn't shown.
mFragment = mActivity.getFragmentManager().findFragmentByTag(mTag);
if (mFragment != null && !mFragment.isDetached()) {
FragmentTransaction ft = mActivity.getFragmentManager()
.beginTransaction();
ft.detach(mFragment);
ft.commit();
}
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
if (mFragment == null) {
mFragment = Fragment.instantiate(mActivity, mClass.getName(),
mArgs);
ft.add(android.R.id.content, mFragment, mTag);
} else {
ft.attach(mFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
Toast.makeText(mActivity, "Reselected!", Toast.LENGTH_SHORT)
.show();
}
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mapFragment"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
相关类(MapFragment.java)
package com.nfc.demo;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MapFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
return inflater.inflate(R.layout.main, container, false);
}
public void onDestroy() {
super.onDestroy();
}
}
错误
android.view.InflateException: Binary XML file line #7:
Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at com.nfc.demo.MapFragment.onCreateView(MapFragment.java:15)
at android.app.Fragment.performCreateView(Fragment.java:1695)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
at android.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1255)
at android.app.BackStackRecord.run(BackStackRecord.java:672)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:441)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5039)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException:
Binary XML file line #7: Duplicate id 0x7f040005, tag null, or
parent id 0xffffffff with another fragment for
com.google.android.gms.maps.MapFragment
at android.app.Activity.onCreateView(Activity.java:4722)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
... 19 more
推荐答案
Matt 建议的答案可行，但它会导致重新创建和重新绘制地图，这并不总是可取的.经过大量的试验和错误，我找到了一个适合我的解决方案:
The answer Matt suggests works, but it cause the map to be recreated and redrawn, which isn't always desirable. After lots of trial and error, I found a solution that works for me:
private static View view;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (view != null) {
ViewGroup parent = (ViewGroup) view.getParent();
if (parent != null)
parent.removeView(view);
}
try {
view = inflater.inflate(R.layout.map, container, false);
} catch (InflateException e) {
/* map is already there, just return view as it is */
}
return view;
}
为了更好的衡量，这里是带有 R.id.mapFragment (android:id="@+id/mapFragment") 的 "map.xml" (R.layout.map):
For good measure, here's "map.xml" (R.layout.map) with R.id.mapFragment (android:id="@+id/mapFragment"):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mapLayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
</LinearLayout>
我希望这会有所帮助，但我不能保证它没有任何不良影响.
I hope this helps, but I can't guarantee that it doesn't have any adverse effects.
有一些不利影响，例如退出应用程序并重新启动时.由于应用程序不一定完全关闭(而只是在后台进入睡眠状态)，我之前提交的代码在重新启动应用程序时会失败.我已经将代码更新为对我有用的东西，两者都在 &退出地图并退出并重新启动应用程序，我对 try-catch 位不太满意，但它似乎工作得很好.在查看堆栈跟踪时，我突然想到我可以检查地图片段是否在 FragmentManager 中，不需要 try-catch 块，代码已更新.
There were some adverse effects, such as when exiting the application and starting it again. Since the application isn't necessarily completely shut down (but just put to sleep in the background), the previous code i submitted would fail upon restarting the application. I've updated the code to something that works for me, both going in & out of the map and exiting and restarting the application, I'm not too happy with the try-catch bit, but it seem to work well enough. When looking at the stack trace it occurred to me that I could just check if the map fragment is in the FragmentManager, no need for the try-catch block, code updated.
更多修改: 事实证明，您毕竟需要 try-catch.毕竟只是检查地图片段并不能很好地工作.布莱尔.
More edits: Turns out you need that try-catch after all. Just checking for the map fragment turned out not to work so well after all. Blergh.
这篇关于ID、标签 null 或父 ID 与 com.google.android.gms.maps.MapFragment 的另一个片段重复的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
