我有一个包含三个TabItem和一个ViewPager的布局，这些选项卡正在工作并显示，但是当我想加载一个新片段时，例如，单击其中一个按钮这些标签布局，无论我做什么，我都无法更改片段。当我单击其中一个选项卡上的按钮时，我想加载片段，但是下面的代码不起作用
getSupportFragmentManager().beginTransaction().
add(R.id.frame_layout_container,userDetailFragment).commit();
replace也无效，我是android开发的初学者，有人可以帮我吗？
额外的解释：在其中之一中，我有一个listview，我想要的是当我单击该项目时，我将转到该项目的详细信息。这是主xml文件中的代码：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:fitsSystemWindows="true"
android:id="@+id/drawer_layout"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent" android:orientation="vertical" android:id="@+id/LinearLayout">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:id="@+id/toolbar"
android:background="#37548D"
android:elevation="4dp" />
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tab_layout"
android:background="#115A91"
app:tabSelectedTextColor="#FFF"
app:tabTextColor="#0A1102"
>
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/enter_tab"
android:text="@string/inter_fragment"
/>
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/contact_tab"
android:text="@string/fragment_contacts"
/>
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/register_tab"
android:text="@string/register_fragment"
/>
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/frame_layout_container"
/>
</LinearLayout>
<android.support.design.widget.NavigationView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:id="@+id/navigation_view"
app:headerLayout="@layout/drawer_layout"
app:menu="@menu/main_menu"
/>
</android.support.v4.widget.DrawerLayout>
update：这是我的UserDetailFragment的代码，其中有一个ListFragment
public class ContactsFragment extends ListFragment {
CallBacks callBacks;
public ContactsFragment() { }
ArrayList<UserObject> userObjects;
BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
userObjects = intent.getParcelableArrayListExtra(Intent_Service.SERVICE_PAYLOAD);
ArrayAdapter<UserObject> userObjectArrayAdapter = new UserArrayAdapter(context,0,userObjects);
setListAdapter(userObjectArrayAdapter);
}
};
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = new Intent(getActivity(), Intent_Service.class);
getActivity().startService(intent);
LocalBroadcastManager.getInstance(getActivity().getApplicationContext()).
registerReceiver(broadcastReceiver,new IntentFilter(Intent_Service.SERVICE_MESSAGE));
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_contacts,null);
}
public void onListItemClick(ListView l, View v, int position, long id) {
UserObject userObject = userObjects.get(position);
this.callBacks.send_user_object(userObject);
}
public interface CallBacks {
public void send_user_object(UserObject userObject);
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
this.callBacks = (CallBacks)context;
}
}
这是我MainActivity的代码：
public class MainActivity extends AppCompatActivity implements ContactsFragment.CallBacks {
android.support.v7.widget.Toolbar toolbar;
PageAdapter pageAdapter;
ViewPager viewPager;
TabLayout tabLayout;
TabItem contacts;
TabItem register;
TabItem signIn;
// ArashBroadCast broadcastReceiver = new ArashBroadCast(this);
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_page_drawer);
tab_variable_initialiser();
setSupportActionBar(toolbar);
NavigationView navigationView = findViewById(R.id.navigation_view);
navigationView.setItemIconTintList(null);
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
if(tab.getPosition() == 1) {
toolbar.setBackgroundColor(ContextCompat.getColor(MainActivity.this,R.color.tab_contacts));
tabLayout.setBackgroundColor(ContextCompat.getColor(MainActivity.this,R.color.main_contacts));
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
getWindow().setStatusBarColor(ContextCompat.getColor(MainActivity.this,R.color.status_contacts));
}
} else if(tab.getPosition() == 2) {
toolbar.setBackgroundColor(ContextCompat.getColor(MainActivity.this,R.color.tab_register));
tabLayout.setBackgroundColor(ContextCompat.getColor(MainActivity.this,R.color.main_register));
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
getWindow().setStatusBarColor(ContextCompat.getColor(MainActivity.this,R.color.status_register));
}
} else {
toolbar.setBackgroundColor(ContextCompat.getColor(MainActivity.this,R.color.tab_signin));
tabLayout.setBackgroundColor(ContextCompat.getColor(MainActivity.this,R.color.main_signin));
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
getWindow().setStatusBarColor(ContextCompat.getColor(MainActivity.this,R.color.status_signin));
}
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
// tabLayout.setupWithViewPager(viewPager);
}
protected void onDestroy() {
super.onDestroy();
}
public void tab_variable_initialiser() {
this.tabLayout = findViewById(R.id.tab_layout);
this.contacts = findViewById(R.id.contact_tab);
this.register = findViewById(R.id.register_tab);
this.signIn = findViewById(R.id.enter_tab);
this.viewPager = findViewById(R.id.view_pager);
this.pageAdapter = new PageAdapter(getSupportFragmentManager(),tabLayout.getTabCount());
this.viewPager.setAdapter(pageAdapter);
this.toolbar = findViewById(R.id.toolbar);
}
@Override
public void send_user_object(UserObject userObject) {
UserDetailFragment userDetailFragment = new UserDetailFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.contact_fragment_layout,userDetailFragment).commit();
}
}
如果我使用R.id.contact_tab，它可以工作，但是不能替换整个片段，而是在列表下面显示userDetailFragment。
我得到错误：No view found for id 0x7f080031 (arash.samandar.recyclerview_final:id/contact_tab) for fragment UserDetailFragment{e489f08 #3 id=0x7f080031}
答案 0 :(得分：0)
您应该将viewpager与tablayout关联起来
tabLayout.setupWithViewPager(viewPager)
修改
如何设置TabLayout的样式
首先添加您的样式：
<style name="AppTabLayoutDetail" parent="Widget.Design.TabLayout">
<item name="tabIndicatorColor">@color/colorPrimary</item>
<item name="tabIndicatorHeight">2dp</item>
<item name="tabPaddingStart">6dp</item>
<item name="tabPaddingEnd">6dp</item>
<item name="tabBackground">?attr/selectableItemBackground</item>
<item name="tabTextAppearance">@style/AppTabTextAppearance</item>
<item name="tabSelectedTextColor">@color/colorPrimary</item>
</style>
<style name="AppTabTextAppearance" parent="TextAppearance.Design.Tab">
<item name="android:textSize">12sp</item>
<item name="android:textColor">#b3ffffff</item>
<item name="textAllCaps">false</item>
</style>
然后将其添加到您的TabLayout
<android.support.design.widget.TabLayout
......
style="@style/AppTabLayoutDetail"
......
/>
别忘了从您的tablayout中删除监听器，并将其与您的pager链接
答案 1 :(得分：0)
经过大量练习，我找到了解决方案： 我学到了什么：
您必须使用FragmentPagerAdapter来处理片段更改。有3件重要的事情：
1）删除上一个片段。
2）调用class BinarySearchTree
{
public:
Node* root;
int countHight=0; //in this line
BinarySearchTree()
{ root = NULL; }
~BinarySearchTree()
{ return; }
void insert(int value);
void display(Node* temp);
void DisplayByLevel(Node* temp,int level);
};
刷新页面列表。
3）如果要求旧片段，则在getItemPosition中返回POSITION_NONE。
这是我在“向左”和“向右”选项卡上使用的练习代码。然后根据用户的操作动态更改片段
这是我的代码：
notifyDataSetChanged()如果它对您有所帮助，请竖起大拇指，我现在会这样做。 谢谢。