更换片段与另一片段显示两个片段

问题描述：

里面一个片段类我想，当用户点击一个按钮，另一个片段，以取代当前片段：更换片段与另一片段显示两个片段

@Override 
    public void onClick(View view) { 
     Fragment fragment = null; 
     switch (view.getId()) { 
      case R.id.buttoncambiarfoto: 
       fragment = new AboutFragment(); 
       replaceFragment(fragment); 
       break; 

      case R.id.buttoncambiarusername: 
       fragment = new AboutFragment(); 
       replaceFragment(fragment); 
       break; 
     } 
    } 
    public void replaceFragment(Fragment someFragment) { 

     FragmentTransaction transaction = getFragmentManager().beginTransaction(); 
     transaction.replace(R.id.perfilId, someFragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 
    }

它的工作原理，但目前的片段留在屏幕，并且新片段同时出现。

我在做什么错？

编辑，当前片段布局：

<FrameLayout 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:id="@+id/perfilId" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context="com.juarezserver.mergeapp.fragment.PerfilFragment"> 

    <!-- TODO: Update blank fragment layout --> 

    <ScrollView 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_weight="1"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:orientation="vertical"> 


      <ImageView 
       android:id="@+id/fotoPerfil" 
       android:layout_width="match_parent" 
       android:layout_height="180dp" 
       android:scaleType="fitCenter" 
       app:srcCompat="@drawable/ic_person_pin_black_24dp" /> 

      <Button 
       android:id="@+id/buttoncambiarfoto" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:background="@color/btn_logut_bg" 
       android:text="Editar Foto del Perfil" /> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:orientation="vertical"></LinearLayout> 

      <TextView 
       android:id="@+id/textView3" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:padding="20dp" 
       android:text="Datos Personales" 
       android:textAlignment="center" 
       android:textColor="@color/bg_register" 
       android:textSize="18sp" 
       android:textStyle="bold" /> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1" 
       android:orientation="horizontal" 
       android:padding="10dp"> 

       <TextView 
        android:id="@+id/textView2" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:singleLine="false" 
        android:text="Nombre de usuario" 
        android:textColor="@color/colorPrimaryDark" 
        android:textSize="12sp" 
        android:textStyle="italic" /> 

       <TextView 
        android:id="@+id/txtUsername" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Modesto" /> 

       <Button 
        android:id="@+id/buttoncambiarusername" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:background="@color/btn_logut_bg" 
        android:text="Cambiar nombre de usuario" /> 
      </LinearLayout> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1" 
       android:orientation="horizontal" 
       android:padding="10dp"> 

       <TextView 
        android:id="@+id/textView2" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Nombre" 
        android:textColor="@color/colorPrimaryDark" 
        android:textSize="12sp" 
        android:textStyle="italic" /> 

       <TextView 
        android:id="@+id/txtNombre" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Modesto" /> 

       <Button 
        android:id="@+id/button7" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:background="@color/btn_logut_bg" 
        android:text="Cambiar nombre" /> 
      </LinearLayout> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1" 
       android:orientation="horizontal" 
       android:padding="10dp"> 

       <TextView 
        android:id="@+id/textView2" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Apellidos" 
        android:textColor="@color/colorPrimaryDark" 
        android:textSize="12sp" 
        android:textStyle="italic" /> 

       <TextView 
        android:id="@+id/txtApellidos" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Modesto" /> 

       <Button 
        android:id="@+id/button3" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:background="@color/btn_logut_bg" 
        android:text="Cambiar apellidos" /> 
      </LinearLayout> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1" 
       android:orientation="horizontal" 
       android:padding="10dp"> 

       <TextView 
        android:id="@+id/textView2" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Email" 
        android:textColor="@color/colorPrimaryDark" 
        android:textSize="12sp" 
        android:textStyle="italic" /> 

       <TextView 
        android:id="@+id/txtEmail" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Modesto" /> 

      </LinearLayout> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1" 
       android:orientation="horizontal" 
       android:padding="10dp"> 

       <TextView 
        android:id="@+id/textView2" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Celular" 
        android:textColor="@color/colorPrimaryDark" 
        android:textSize="12sp" 
        android:textStyle="italic" /> 

       <TextView 
        android:id="@+id/txtCel" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="Modesto" /> 

       <Button 
        android:id="@+id/button6" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:background="@color/btn_logut_bg" 
        android:text="Cambiar celular" /> 


      </LinearLayout> 

     </LinearLayout> 
    </ScrollView> 

</FrameLayout>

您添加了相同的片段？有什么问题 –

'fragment = new AboutFragment（）;'...你正在添加相同的片段双倍..check – rafsanahmad007

添加背景到片段的根布局 – Reena

答

删除：transaction.addToBackStack(null); 不中添加相同片段到堆栈中

谢谢，但你的建议并不能解决问题。 – mvasco

答

此代码将删除当前片段的问题仍然在屏幕上，而新片段同时出现。也会帮助你管理后台。我在BottomNavigationView上使用这个，你也可以使用NavigationView。我不知道它可以减少或没有，但与片段对我的伟大工程

@Override 
public boolean onNavigationItemSelected(@NonNull MenuItem item) { 
    switch (item.getItemId()){ 
     case R.id.nav_home: 
      mFragment = getSupportFragmentManager().findFragmentByTag("Fragment_Home"); 
      if(!(mFragment!=null && mFragment.isVisible())){ 
       mFragmentManager.popBackStackImmediate("Fragment_Home", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, new HomeFragment(), "Fragment_Home").addToBackStack("Fragment_Home").commit(); 
      }else if(mFragment!=null && !mFragment.isVisible()){ 
       mFragmentManager.popBackStackImmediate("Fragment_Home", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, mFragment, "Fragment_Home").addToBackStack("Fragment_Home").commit(); 
      } 
      return true; 
     case R.id.nav_account: 
      mFragment = getSupportFragmentManager().findFragmentByTag("Fragment_Account"); 
      if(!(mFragment != null && mFragment.isVisible())){ 
       mFragmentManager.popBackStackImmediate("Fragment_Account", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, new AccountFragment(), "Fragment_Account").addToBackStack("Fragment_Account").commit(); 
      }else if(mFragment!=null && !mFragment.isVisible()){ 
       mFragmentManager.popBackStackImmediate("Fragment_Account", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, mFragment, "Fragment_Account").addToBackStack("Fragment_Account").commit(); 
      } 
      return true; 
     case R.id.nav_category: 
      mFragment = getSupportFragmentManager().findFragmentByTag("Fragment_Category"); 
      if(!(mFragment != null && mFragment.isVisible())){ 
       mFragmentManager.popBackStackImmediate("Fragment_Category", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, new CategoryFragment(), "Fragment_Category").addToBackStack("Fragment_Category").commit(); 
      }else if(mFragment!=null && !mFragment.isVisible()){ 
       mFragmentManager.popBackStackImmediate("Fragment_Category", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, mFragment, "Fragment_Category").addToBackStack("Fragment_Category").commit(); 
      } 
      return true; 
     case R.id.nav_services: 
      mFragment = getSupportFragmentManager().findFragmentByTag("Fragment_Services"); 
      if(!(mFragment != null && mFragment.isVisible())){ 
       mFragmentManager.popBackStackImmediate("Fragment_Services", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, new ServicesFragment(), "Fragment_Services").addToBackStack("Fragment_Services").commit(); 
      }else if(mFragment!=null && !mFragment.isVisible()){ 
       mFragmentManager.popBackStackImmediate("Fragment_Services", FragmentManager.POP_BACK_STACK_INCLUSIVE); 
       mFragmentTransaction = mFragmentManager.beginTransaction(); 
       mFragmentTransaction.replace(R.id.container, mFragment, "Fragment_Services").addToBackStack("Fragment_Services").commit(); 
      } 
      return true; 
    } 
    return false; 
}

答

添加标签和尝试...

public void replaceFragment(Fragment someFragment, String fragmentTag) { 

    FragmentTransaction transaction = getFragmentManager().beginTransaction(); 
    transaction.replace(R.id.perfilId, someFragment, fragmentTag); 
    transaction.addToBackStack(null); 
    transaction.commit(); 
}

并添加片段标签象下面这样： -

@Override 
public void onClick(View view) { 
    Fragment fragment = null; 
    switch (view.getId()) { 
     case R.id.buttoncambiarfoto: 
      fragment = new AboutFragment(); 
      replaceFragment(fragment,"CAMBIAR_FOTO_FRAGMENT"); 
      break; 

     case R.id.buttoncambiarusername: 
      fragment = new AboutFragment(); 
      replaceFragment(fragment,"CAMBIAR_USERNAME_FRAGMENT"); 
      break; 
    } 
}

和我应该改变内部公共无效onClick（视图视图），调用replaceFragment两个参数？ – mvasco

@mvasco尝试新的编辑答案.. –

答

@Override  
public void onClick(View view) { 
Fragment fragment = null; 
switch (view.getId()) { 
case R.id.buttoncambiarfoto:     
fragment = new "Change the fragment class constructor here with respect to the button click" 
        replaceFragment(fragment); 
        break; 
       case R.id.buttoncambiarusername: 
        fragment = new "Change the fragment class constructor here with respect to the button click " 

        replaceFragment(fragment); 

        break; 

      } 

     } 

     public void replaceFragment(Fragment someFragment) { 


      FragmentTransaction transaction = getFragmentManager().beginTransaction(); 

      transaction.replace(R.id.perfilId, someFragment); 

      transaction.addToBackStack(null); 

      transaction.commit(); 

     }

谢谢，但结果相同。 – mvasco

您也可以检查相应片段的onCreateView，并检查是否已为其初始化相应的xml布局，而不是该类的相同xml文件。 –

@覆盖公共查看onCreateView（LayoutInflater吹气，ViewGroup中容器，捆绑savedInstanceState）{// 充气布局对该片段回报inflater.inflate（R.layout。class_layout_xml，container，false）; } –

更换片段与另一片段显示两个片段

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