Question

片段错误logcat，如果立即崩溃，当我尝试启动应用程序时，home片段不喜欢它。

2019-09-23 16:45:10.033 6139-6139/? E/ex.connexsocia: Unknown bits set in runtime_flags: 0x8000 2019-09-23 16:45:11.249 6139-6139/com.connex.connexsocial E/FragmentManager: No view found for id 0x7f080055 (com.connex.connexsocial:id/container) for fragment HomeFragment{3cd0405 (50d70a86-2cb8-4ba3-844c-f016bd5545cb) id=0x7f080055 } 2019-09-23 16:45:11.249 6139-6139/com.connex.connexsocial E/FragmentManager: Activity state: 2019-09-23 16:45:11.269 6139-6139/com.connex.connexsocial E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.connex.connexsocial, PID: 6139

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="schemas.android.com/apk/res/android"
    xmlns:tools="schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HomeFragment">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textAlignment="center"
            android:textSize="30sp" 
            android:gravity="center"
            android:text="Home" />
</FrameLayout>

Answer 1

我看到您的id没有设置TextView。像下面这样给它id，希望它能起作用。

<TextView
 android:id="@+id/tv_name_your_textview"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:textAlignment="center"
 android:textSize="30sp" 
 android:gravity="center"
 android:text="Home" />

然后从您的片段中调用它，例如：（我在Kotlin中这样做）

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    val containerView = inflater.inflate(R.layout.fragment_restaurant_food_cart_preview, container, false)
    containerView.tv_name_your_textview.text = "Some value"
    return containerView 
}

Answer 2

要向活动添加片段，我们可以在Framelayout中使用容器ID，但是您忘了在framelayout中使用id。因此，请在您的框架布局中添加ID。

 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:tools="http://schemas.android.com/tools"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             tools:context=".HomeFragment"
            android:id="@+id/container">


    <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textAlignment="center"
            android:textSize="30sp"
            android:gravity="center"
            android:text="Home" />

</FrameLayout>

并在您的活动中添加这样的片段

 FragmentManager manager = getSupportFragmentManager();
    FragmentTransaction transaction = manager.beginTransaction();
    transaction.add(R.id.container, new HomeFragment()).commit();

Answer 3

public class HomeFragment extends Fragment{
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup 
        container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.home_fragment,container,false);
    return view;
}

像这样初始化片段布局

应用程序一打开就崩溃-E / FragmentManager：找不到ID的视图

3 个答案: