SupportFragment未在设备上显示

目前我正在学习android支持库，并且我想将SupportFragments添加到我的测试应用程序中。我已经实现的片段正在使用我的2.3.3模拟器和我的平板电脑Samsung Note 4.0.4，但不支持使用5.x的Samsung S5。SupportFragment未在设备上显示

实现的NavigationDrawer工作得很好，相应的方法都被调用。当我打开抽屉时，单击第二个菜单项调用替换碎片的方法。

我希望我已经添加了所有重要的代码部分。

logcat的输出：

11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest E/Zygote: MountEmulatedStorage() 
11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest E/Zygote: v2 
11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest I/SELinux: Function: selinux_compare_spd_ram, SPD-policy is existed. and_ver=SEPF_SM-G901F_5.0.2 ver=27 
11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest I/SELinux: Function: selinux_compare_spd_ram , priority [1] , priority version is VE=SEPF_SM-G901F_5.0.2_0027 
11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest E/SELinux: [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL 
11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest I/art: Late-enabling -Xcheck:jni 
11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest I/libpersona: KNOX_SDCARD checking this for 10292 
11-03 14:04:26.356 4861-4861/incentivelabs.supportlibtest I/libpersona: KNOX_SDCARD not a persona 
11-03 14:04:26.376 4861-4861/incentivelabs.supportlibtest D/TimaKeyStoreProvider: TimaSignature is unavailable 
11-03 14:04:26.386 4861-4861/incentivelabs.supportlibtest D/ActivityThread: Added TimaKeyStore provider 
11-03 14:04:26.566 4861-4878/incentivelabs.supportlibtest I/GMPM: App measurement is starting up 
11-03 14:04:26.566 4861-4878/incentivelabs.supportlibtest E/GMPM: getGoogleAppId failed with status: 10 
11-03 14:04:26.576 4861-4878/incentivelabs.supportlibtest E/GMPM: Uploading is not possible. App measurement disabled 
11-03 14:04:26.626 4861-4861/incentivelabs.supportlibtest D/PhoneWindow: *FMB* installDecor mIsFloating : false 
11-03 14:04:26.626 4861-4861/incentivelabs.supportlibtest D/PhoneWindow: *FMB* installDecor flags : -2139029248 
11-03 14:04:26.656 4861-4861/incentivelabs.supportlibtest D/AbsListView: Get MotionRecognitionManager 
11-03 14:04:26.686 4861-4861/incentivelabs.supportlibtest D/API: RUNNING NEW DEVICE 
11-03 14:04:26.716 4861-4897/incentivelabs.supportlibtest D/OpenGLRenderer: Render dirty regions requested: true 
11-03 14:04:26.726 4861-4861/incentivelabs.supportlibtest D/PhoneWindow: *FMB* isFloatingMenuEnabled mFloatingMenuBtn : null 
11-03 14:04:26.726 4861-4861/incentivelabs.supportlibtest D/PhoneWindow: *FMB* isFloatingMenuEnabled return false 
11-03 14:04:26.766 4861-4897/incentivelabs.supportlibtest I/Adreno: EGLInit: QTI Build: 02/03/15, b606245, I0829b9e471, 20150203_LA_BF_2_1_AU139 
11-03 14:04:26.776 4861-4897/incentivelabs.supportlibtest I/OpenGLRenderer: Initialized EGL, version 1.4 
11-03 14:04:26.786 4861-4897/incentivelabs.supportlibtest D/OpenGLRenderer: Get maximum texture size. GL_MAX_TEXTURE_SIZE is 16384 
11-03 14:04:26.786 4861-4897/incentivelabs.supportlibtest D/OpenGLRenderer: Enabling debug mode 0 
11-03 14:04:26.936 4861-4861/incentivelabs.supportlibtest I/Timeline: Timeline: Activity_idle id: [email protected] time:553865839

MainActivity（包含片段）：

package incentivelabs.supportlibtest; 

import android.net.Uri; 
import android.os.Build; 
import android.os.Bundle; 
import android.support.design.widget.NavigationView; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v4.view.GravityCompat; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.AdapterView; 

public class MainActivity extends AppCompatActivity 
     implements BlankFragment.OnFragmentInteractionListener, 
        PlusOneFragment.OnFragmentInteractionListener, 
        NavigationView.OnNavigationItemSelectedListener 
{ 


    Toolbar mToolbar; 
    DrawerLayout mDrawer; 
    NavigationView mNavViewer; 

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

     mDrawer = (DrawerLayout)findViewById(R.id.drawerlayout); 
     mNavViewer = (NavigationView) findViewById(R.id.navigationViewer); 
     mNavViewer.setNavigationItemSelectedListener(this); 

     mToolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(mToolbar); 

     android.support.v7.app.ActionBar actionBar = getSupportActionBar(); 
     if(actionBar != null) 
      getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
     mToolbar.setNavigationOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mDrawer.openDrawer(GravityCompat.START); 
      } 
     }); 

     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { 
      Log.d("API", "RUNNING NEW DEVICE"); 
     }else{ 
      Log.d("API", "RUNNING OLD DEVICE"); 
     } 

     getSupportFragmentManager().beginTransaction().add(R.id.nav_contentframe, new BlankFragment()).commit(); 

    } 


    @Override 
    public void onFragmentInteraction(Uri uri) { 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     MenuInflater inflater = getMenuInflater(); 
     inflater.inflate(R.menu.context_menu, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo(); 
     Log.d("Menu", "Button pressed"); 
     switch (item.getItemId()) { 
      case R.id.file: 
       Snackbar.make(mDrawer,"Context Menu button pressed", Snackbar.LENGTH_LONG).setAction("Action", null).show(); 
       return true; 

      default: 
       return super.onContextItemSelected(item); 
     } 
    } 

    private void switchFragement(Fragment target){ 
     Log.d("Fragment", "Switching fragment"); 
     FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); 

     // Replace whatever is in the fragment_container view with this fragment, 
     // and add the transaction to the back stack so the user can navigate back 
     transaction.replace(R.id.nav_contentframe, target); 
     transaction.addToBackStack(null); 

     // Commit the transaction 
     transaction.commit(); 
    } 

    @Override 
    public boolean onNavigationItemSelected(MenuItem menuItem) { 
     menuItem.setCheckable(true); 
     switch(menuItem.getItemId()){ 
      case R.id.navigation_item_1: 
       switchFragement(new BlankFragment()); 
       break; 

      case R.id.navigation_item_2: 
       switchFragement(new PlusOneFragment()); 
       break; 
     } 
     mDrawer.closeDrawer(GravityCompat.START); 
     return true; 
    } 
}

布局XML文件：

<?xml version="1.0" encoding="utf-8"?> 

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/drawerlayout" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    tools:context=".MainActivity"> 



    <android.support.design.widget.AppBarLayout 
     android:layout_height="wrap_content" 
     android:layout_width="fill_parent" 
     android:theme="@style/AppTheme"> 

     <android.support.v7.widget.Toolbar 
      xmlns:android="http://schemas.android.com/apk/res/android" 
      android:id="@+id/toolbar" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:fitsSystemWindows="false" 
      android:theme="@style/AppTheme" 
      android:background="@color/colorAccent"/> 

    </android.support.design.widget.AppBarLayout> 

    <FrameLayout 
     android:id="@+id/nav_contentframe" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_marginTop="?attr/actionBarSize" /> 




    <android.support.design.widget.NavigationView 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:fitsSystemWindows="true" 
     android:id="@+id/navigationViewer" 
     android:divider="@color/colorAccent" 
     app:headerLayout="@layout/menu_header_layout" 
     app:menu="@menu/drawer_menu" /> 

</android.support.v4.widget.DrawerLayout>

的BlankFrament（另一个看起来几乎相同）

package incentivelabs.supportlibtest; 

import android.app.Activity; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 


/** 
* A simple {@link Fragment} subclass. 
* Activities that contain this fragment must implement the 
* {@link BlankFragment.OnFragmentInteractionListener} interface 
* to handle interaction events. 
* Use the {@link BlankFragment#newInstance} factory method to 
* create an instance of this fragment. 
*/ 
public class BlankFragment extends Fragment { 


    private OnFragmentInteractionListener mListener; 

    /** 
    * Use this factory method to create a new instance of 
    * this fragment using the provided parameters. 
    * 
    * @param param1 Parameter 1. 
    * @param param2 Parameter 2. 
    * @return A new instance of fragment BlankFragment. 
    */ 
    // TODO: Rename and change types and number of parameters 
    public static BlankFragment newInstance(String param1, String param2) { 
     BlankFragment fragment = new BlankFragment(); 
     Bundle args = new Bundle(); 
     fragment.setArguments(args); 
     return fragment; 
    } 

    public BlankFragment() { 
     // Required empty public constructor 
    } 

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

    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     return inflater.inflate(R.layout.fragment_blank, container, false); 
    } 

    // TODO: Rename method, update argument and hook method into UI event 
    public void onButtonPressed(Uri uri) { 
     if (mListener != null) { 
      mListener.onFragmentInteraction(uri); 
     } 
    } 

    @Override 
    public void onAttach(Activity activity) { 
     super.onAttach(activity); 
     try { 
      mListener = (OnFragmentInteractionListener) activity; 
     } catch (ClassCastException e) { 
      throw new ClassCastException(activity.toString() 
        + " must implement OnFragmentInteractionListener"); 
     } 
    } 

    @Override 
    public void onDetach() { 
     super.onDetach(); 
     mListener = null; 
    } 

    /** 
    * This interface must be implemented by activities that contain this 
    * fragment to allow an interaction in this fragment to be communicated 
    * to the activity and potentially other fragments contained in that 
    * activity. 
    * <p/> 
    * See the Android Training lesson <a href= 
    * "http://developer.android.com/training/basics/fragments/communicating.html" 
    * >Communicating with Other Fragments</a> for more information. 
    */ 
    public interface OnFragmentInteractionListener { 
     // TODO: Update argument type and name 
     public void onFragmentInteraction(Uri uri); 
    } 

}

来源

2015-11-03 glethien

看来问题是布局xml文件。 AppBarLayout占据了整个屏幕，所以碎片的FrameLayout是不可见的（我猜想在底部的屏幕之外）。我将FrameLayout放置在AppBarLayout中（我不知道这是否是一种非常好的做法），现在在我测试过的每个设备上，一切正常。

<android.support.design.widget.AppBarLayout 
     android:layout_height="wrap_content" 
     android:layout_width="fill_parent"> 

     <android.support.v7.widget.Toolbar 
      xmlns:android="http://schemas.android.com/apk/res/android" 
      android:id="@+id/toolbar" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:background="@android:color/darker_gray"/> 

     <FrameLayout 
      android:id="@+id/nav_contentframe" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:layout_weight="13" 
      android:background="@android:color/background_light" 
      />

来源

2015-11-04 07:29:05 glethien

SupportFragment未在设备上显示

回答

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