SupportMapFragment一个选项卡上。我只能看到一次 [英] SupportMapFragment on a tab. I can only see once

问题描述

我正在使用FragmentTabHost选项卡式应用程序。我的一个标签（片段）的是一个映射（延伸片段），我只能看到我第一次选择它，如果我选择了其他选项卡，并返回到地图，应用程序崩溃...

I'm working on a tabbed application using FragmentTabHost. One of my tabs(Fragments) is a map (extends Fragment), and I can only see the first time I select it, If I select other tab and back to map, app crashes...

该应用程序必须与API8兼容

The app must be compatible with API8

主要活动

package pack.unimaps2;

import com.google.android.gms.common.GooglePlayServicesUtil;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.Menu;

public class MainActivity extends FragmentActivity {
private FragmentTabHost mTabHost;

@Override
protected void onCreate(Bundle savedInstanceState) {
    GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);
    mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);

    mTabHost.addTab(mTabHost.newTabSpec("simple").setIndicator("Ir a..."),
            Fragments.RutaHastaTab.class, null);
    mTabHost.addTab(mTabHost.newTabSpec("mapa").setIndicator("Mapa"),
            Fragments.map.class, null);
    mTabHost.addTab(mTabHost.newTabSpec("acercade").setIndicator("Acerca de..."),
            Fragments.AcercaDeTab.class, null);

}


}

FragmentsActivity（略第一个片段）

FragmentsActivity (Omitted first fragment)

package pack.unimaps2;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


import com.google.android.gms.maps.SupportMapFragment;

public class Fragments extends FragmentActivity {


    public static class map extends Fragment{

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.map, container, false);
            return v;
        }

    }

    public static class AcercaDeTab extends Fragment {

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.tab_acercade, container, false);
            return v;
        }

    }
}

和XML创建地图片段的视图（map.xml）：

And the xml to create the view of map Fragment (map.xml):

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/map"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 class="com.google.android.gms.maps.SupportMapFragment"/>

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03-30 21:07:49.180: E/AndroidRuntime(16464): FATAL EXCEPTION: main
03-30 21:07:49.180: E/AndroidRuntime(16464): android.view.InflateException: Binary XML file line #1: Error inflating class fragment
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at pack.unimaps2.Fragments$map.onCreateView(Fragments.java:73)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1264)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:672)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:429)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.os.Handler.handleCallback(Handler.java:615)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.os.Handler.dispatchMessage(Handler.java:92)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.os.Looper.loop(Looper.java:137)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.app.ActivityThread.main(ActivityThread.java:4745)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at java.lang.reflect.Method.invokeNative(Native Method)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at java.lang.reflect.Method.invoke(Method.java:511)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at dalvik.system.NativeStart.main(Native Method)
03-30 21:07:49.180: E/AndroidRuntime(16464): Caused by: java.lang.IllegalArgumentException: Binary XML file line #1: Duplicate id 0x7f040007, tag null, or parent id 0x0 with another fragment for com.google.android.gms.maps.SupportMapFragment
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:285)
03-30 21:07:49.180: E/AndroidRuntime(16464):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
03-30 21:07:49.180: E/AndroidRuntime(16464):    ... 18 more

不知道什么是错的，谢谢你的帮助...

Don't know what is wrong, thank you for your help...

推荐答案

仍在寻找答案？

您不能夸大onCreateView所有的时间布局每次。使用的线沿线的东西：

You can't inflate the layout everytime onCreateView all the time. Use something along the lines of:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    if (view != null && this.previousContainer == container) {
        ViewGroup parent = (ViewGroup) view.getParent();
        if (parent != null) {
            parent.removeView(view);
        }
    } else {
        try {
            view = inflater.inflate(R.layout.map, container, false);
            this.previousContainer = container;
        } catch (InflateException e) {
            Log.w("InflateException happened ou nous", e.getMessage());
        }
    }
    return view;
}

我设法prevent重建的片段时，也失去了地图（从纵向改为横向例如当）

I managed to prevent that and also losing the map when recreating the Fragment (when changing from vertical to landscape for instance)

这篇关于SupportMapFragment一个选项卡上。我只能看到一次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！