相关疑难解决方法(0)

我正在尝试制作一个应用,当用户点击ListView中的项目时,会显示GoogleMaps.

我试过以下代码:

ShowPlacesActivity.java

public class ShowPlaceActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_show_place);
        if (savedInstanceState == null) {
            getFragmentManager().beginTransaction()
                    .add(R.id.container_showplaces, new PlaceholderFragment())
                    .commit();
        }
        getActionBar().setSubtitle(getString(R.string.activity_showplaces_subtitle));
    }

}

activity_show_place.xml

<FrameLayout

    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container_showplaces"
    android:layout_width="match_parent" android:layout_height="match_parent"
    tools:context="com.krupal.rememberthisplace.ShowPlaceActivity" tools:ignore="MergeRootFrame" />

fragment_show_place.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:orientation="vertical"

    >


    <ListView
        android:id="@+id/listView_places"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
      />


</LinearLayout>

fragment_maps.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <fragment
        android:id="@+id/mymap"
        android:name="com.google.android.gms.maps.MapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

我想在listview的项目上显示地图点击...所以,我已经实现了两个片段,如下所示:

在PlaceholderFragment.java中,我设置onitemclicklistener为:

@Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle …

我制作了一个应用程序,其中我在我的位置显示了带有GPS位置标记的Google地图.此地图位于第一个选项卡上,我还有另外两个选项卡,如下图所示

现在我面临一个问题,即当我从选项卡1移动到选项卡2然后再转到选项卡1时它完美地工作,但是当我移动到选项卡3然后移回选项卡1或选项卡2时,应用程序崩溃并给出以下内容例外情况LogCat:

01-27 18:35:26.190 9414-9414/com.example.accurat.faisal E/AndroidRuntime: FATAL EXCEPTION: main
  Process: com.example.accurat.faisal, PID: 9414
  android.view.InflateException: Binary XML file line #26: Binary XML file line #26: Error inflating class fragment
      at android.view.LayoutInflater.inflate(LayoutInflater.java:551)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:429)
      at com.example.accurat.faisal.MyLocation.onCreateView(MyLocation.java:62)
      at android.support.v4.app.Fragment.performCreateView(Fragment.java:2184)
      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1298)
      at android.support.v4.app.FragmentManagerImpl.moveFragmentsToInvisible(FragmentManager.java:2323)
      at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2136)
      at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2092)
      at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1969)
      at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:620)
      at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
      at android.support.v4.view.ViewPager.populate(ViewPager.java:1268)
      at android.support.v4.view.ViewPager.populate(ViewPager.java:1116)
      at android.support.v4.view.ViewPager$3.run(ViewPager.java:273)
      at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
      at android.view.Choreographer.doCallbacks(Choreographer.java:686)
      at android.view.Choreographer.doFrame(Choreographer.java:619)
      at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
      at android.os.Handler.handleCallback(Handler.java:739)
      at android.os.Handler.dispatchMessage(Handler.java:95)
      at android.os.Looper.loop(Looper.java:148)
      at android.app.ActivityThread.main(ActivityThread.java:7325)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
      at …

我正在尝试用活动做一些事情,但是在一个片段中.我所做的是使用活动:

首先停止旋转设备时重新启动活动 android:configChanges="keyboardHidden|orientation|screenSize"

在我的活动中添加:

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

 setContentView(R.layout.main);
}

因此,获取活动不会重新启动,而是重新加载main.xml,以使用layout-land

现在我有一个显示viewpager的活动,其中包含三个片段.一切正常.旋转的检测在碎片中

public class FRG_map_web extends Fragment  {

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);

        Log.i("myLogs", "Rotation");

    }

问题是片段不使用setContentView(R.layout.main); 这是代码:

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.frg.myFragment, null); 

我试着用:

LayoutInflater inflater = inflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

view = inflater.inflate(R.layout.frg.myFragment, null); 

...

LayoutInflater vi = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

view = inflater.inflate(R.layout.frg.myFragment, null); 

...

LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );

view = inflater.inflate(R.layout.frg.myFragment, …

我试图找出原因:

getSupportFragmentManager().beginTransaction().commit();

失败了

java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState

在一个非常基本的FragmentActivity类中.

所以这是我的用例(这将是一些伪代码,而不是一个完整的例子,抱歉):我有一个FragmentActivity与内部AsyncTask类.大概是这样的:

public class HelloWorld extends FragmentActivity {
    showFragment(Fragment fragment, String name) {
        getSupportFragmentManager().beginTransaction().replace(R.id.fragmentContainer, fragment, name).commit();
    }

    private class SlowFragmentShow extends AsyncTask<Context, String, Void> {
        protected Void doInBackground(Context... contexts) {
            try {
                Thread.sleep(10000);
            } catch (InterruptedException e) {
                /* meh */
            }
        }

        protected void onPostExecute(Void nothing) {
            showFragment(new MyFragment(), "myFragment");
        }
    }
}

或者基本上,在启动应用程序10秒后,它将显示另一个片段.听起来很简单吧？这似乎也很有效,直到我决定旋转手机.当我这样做时,应用程序将在使用"无法执行此操作..."调用"getSupportFragmentManager()..."时崩溃.

两天了,我正试图解决这个问题.我在网上和stackoverflow上搜索过,但我找不到我的问题的答案.

在我的应用程序中,我正在尝试实现两个选项卡.一个需要显示一个地图,在另一个选项卡中我将显示一个列表适配器.(使用ActionBarSherlock)

当我单击第二个选项卡然后单击第一个选项卡时,我得到一个例外:

10-08 01:27:45.203:E/AndroidRuntime(7082):java.lang.IllegalStateException:活动已被破坏

这是我的活动代码和我的片段类.(仅用于测试,我将CustomMapFragment类放两次).

    public class MapActivity extends SherlockFragmentActivity implements    LocationListener,TabListener{

    LatLng mLocation;
    GoogleMap map;

    //CustomMapFragment fragment1 = new CustomMapFragment();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //FragmentManager fm = getSupportFragmentManager();

        if (savedInstanceState == null) {
            setContentView(R.layout.activity_main);
            FragmentManager fm = getSupportFragmentManager();
            setActionBar();
            //fragment2 = new Fragment2(); 

            //FragmentTransaction ft = fm.beginTransaction();
            //ft.add(R.id.container, fragment1, "frag1");

            //ft.add(R.id.fragment_container, fragment2, "frag2");

            //ft.commit();
        }


    }

private void setActionBar() {

        ActionBar actionBar = getSupportActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        CustomMapFragment frag1 = new CustomMapFragment();
        CustomMapFragment frag2 = …

我开发了一个应用程序，它使用片段作为片段的一部分。

public class LoginFragment extends Fragment
   EditTextWithCameraButtonFrag userNameFrag;
   EditTextWithCameraButtonFrag passwordFrag;

 public void onActivityCreated(Bundle savedInstanceState) {
     super.onActivityCreated(savedInstanceState);
     userNameFrag = (EditTextWithCameraButtonFrag)getChildFragmentManager()
            .findFragmentById(R.id.fragment_username);
     passwordFrag = (EditTextWithCameraButtonFrag) getChildFragmentManager()
            .findFragmentById(R.id.fragment_password);

EditTextWithCameraButtonFrag是 Fragment 的子类型。这段代码就像一个魅力，在 android 5.1.1 上运行。但是，在 Android 4.4.2 上运行它会返回 userNameFrage 和 passwordFrag 为 null。所以看起来，返回的 Child FragmentManager 找不到这些字段。

与4.4.3一起使用时有什么需要注意的吗getChildFragmentManager()？

提前致谢！

编辑：这是主要片段的 XML：

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="@dimen/huge"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/login_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="@dimen/activity_vertical_margin"
        android:gravity="center"
        android:textColor="@color/white"
        android:textSize="40dp" />

    <fragment
        android:id="@+id/fragment_username"
        android:name="com.example.app.fragments.EditTextWithCameraButtonFrag"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <fragment
        android:id="@+id/fragment_password"
        android:name="com.example.app.fragments.EditTextWithCameraButtonFrag"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />



    <Button
        android:id="@+id/login_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" …

我正在开发一个新的Android项目.

第一个活动是使用滑块菜单和片段.在第一个片段上有一个列表视图(PrimaryFragmentDormir.java).选择其中一行后,将启动一个新活动.最后一个活动使用三个选项卡,以显示有关所选行对象的不同信息.listview是从远程JSON文件加载的.第一个选项卡显示有关所选对象的详细信息,第二个选项卡应显示地图.

我已按照官方文档设置了在我的应用中包含Google地图所需的所有内容,至少我是这么认为的.当用户选择第二个选项卡时,会显示一个空白屏幕,左下方有Google徽标.

这是Android Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.solinpromex.elpasojuarezexperience" >

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />


    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
    <uses-feature android:glEsVersion="0x00020000" android:required="true"/>

    <uses-library android:name="com.google.android.maps"/>


    <application
        android:name=".app.AppController"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="..hidden here..." />
        <activity
            android:name=".Inicio"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name=".Detalle_Hotel"
            android:label="@string/title_activity_detalle__hotel" >
        </activity>



    </application>

</manifest>

这是托管标签的主要活动:

import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle; …

应用程序加载和EventFragment.java显示地图的视图.当您单击另一个选项卡片段时,它会正常加载,当您返回到第一个选项卡(地图)时,它会崩溃并出现以下错误:

07-03 14:13:54.640: E/AndroidRuntime(11565): FATAL EXCEPTION: main
07-03 14:13:54.640: E/AndroidRuntime(11565): android.view.InflateException: Binary XML file line #5: Error inflating class fragment
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:587)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at co.uk.thesomewhere.townpearlfest.EventFragment.onCreateView(EventFragment.java:48)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1264)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:672)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
07-03 14:13:54.640: E/AndroidRuntime(11565):    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:429)
07-03 14:13:54.640: E/AndroidRuntime(11565): …

我正在尝试将一个片段插入另一个片段，并且我已经成功做到这一点，直到我第一次吃完主要片段为止，但是当我尝试重新加载片段时，应用崩溃了，我有这个错误：

Caused by: java.lang.IllegalArgumentException: Binary XML file line #26:
Duplicate id 0x7f0e00e2, tag null, or parent id 0xffffffff with another
fragment for com.google.android.gms.location.places.ui.PlaceAutocompleteFragment

这是我的片段

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {

View  rootView = inflater.inflate(R.layout.source_destination,container, false);
PlaceAutocompleteFragment sourcr_autocompleteFragment = (PlaceAutocompleteFragment)
          getActivity().getFragmentManager()
.findFragmentById(R.id.sourcr_autocomplete_fragment);
return rootView;

// List item

}

这是我的XML

 <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:padding="10dp"
        android:background="@color/colorPrimary"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
       <android.support.v7.widget.CardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/margin_medium"
            android:layout_marginBottom="@dimen/margin_medium">

            <fragment
                android:id="@+id/sourcr_autocomplete_fragment"    
                android:name="com.google.android.gms.location.places.ui.PlaceAutocompleteFragment"           
              android:layout_width="match_parent"
              android:layout_height="wrap_content" />

        </android.support.v7.widget.CardView>
    </LinearLayout>

我有一个导航抽屉,其中Map是其他项目中的一个选项.当我点击我的地图时,它有效.如果我再次转到其他导航抽屉项目并返回地图,它会崩溃.谁能告诉我原因？

这是代码..

public class Map extends Fragment {
private GoogleMap mMap;

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

    return view;
}

@Override
public void onResume() {
    super.onResume();
    setUpMapIfNeeded();
}

@Override
public void onPause() {
    super.onPause();
    setUpMapIfNeeded();

}

@Override
public void onDestroy() {
    super.onDestroy();
}

private void setUpMapIfNeeded() {

    if (mMap == null) {

        FragmentManager fm = getFragmentManager();
        mMap = ((SupportMapFragment) fm.findFragmentById(R.id.map))
                .getMap();
        if (mMap != null) {
            setUpMap();
        }
    } …

我正在设计我的应用程序具有向后兼容性,所以我已经实现了支持和设计库,以使用导航抽屉和其他与新的Android版本相关的效果.

导航抽屉管理总共5个片段.其中一个片段包含一张地图:

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        class="com.google.android.gms.maps.MapFragment" />

-

public class LocationFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_location, container, false);

        /*Try to obtain the map from the SupportMapFragment*/
        mMap = ((MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map)).getMap();

这就是我如何从mainActivity上的导航抽屉管理片段:

public class MainActivity extends AppCompatActivity implements DrawerLayout.DrawerListener{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        navView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
        @Override public boolean onNavigationItemSelected(MenuItem menuItem) {
            menuItem.setChecked(true);
            displayFragment(menuItem.getItemId());
            drawerLayout.closeDrawers();
            return true;
        } …