java - Android 应用程序错误没有为片段的 id(..) 找到视图

Question

我正在使用带有 2 个片段的选项卡式活动。这两个工作得很好，但我试图在第一个片段中创建一个按钮，它将打开另一个带有 WebView 的片段。我没有找到任何视图，我不知道如何解决它。这是第一个片段：

import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;


public class Frag1 extends Fragment{
    private Button button;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable final ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.tab1_fragment, container, false);
        button = (Button) view.findViewById(R.id.button);
        button.setEnabled(false);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Frag3 frag3 = new Frag3();
                FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
                fragmentTransaction.replace(R.id.webid, frag3, "Web").commit();

            }
        });
        return view;
}

这是第一个片段的布局：tab1_fragment

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    android:id="@+id/tab1"
    >

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="@string/webpage" />



</RelativeLayout>

这是带有 webview 的片段：

import android.view.View;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class Frag3 extends Fragment {
    private static final String TAG = "Web";
    private WebView webView;

    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.web_fragment, container, false);
        webView = (WebView) view.findViewById(R.id.webView);
        webView.setWebViewClient(new WebViewClient());
        webView.loadUrl("https://www.google.com");
        return view;
    }
}

这是它的布局：web_fragment

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/webid"
    >

    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

每次我按下按钮时，应用程序都会崩溃，除非我将 R.id.webid 替换为 R.id.tab1，这将只显示按钮或 R.id.test2（这是 activity_main 布局的 id），这将显示一个空白屏幕。任何帮助将不胜感激！

编辑~这里是Logcat：

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.myapplication, PID: 10381
    java.lang.IllegalArgumentException: No view found for id 0x7f0800d1 (com.example.myapplication:id/webid) for fragment Frag3{8ca7c59 #0 id=0x7f0800d1 Web}
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1454)
        at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
        at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
        at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:802)
        at androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
        at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
        at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
        at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
        at androidx.fragment.app.FragmentManagerImpl$1.run(FragmentManager.java:733)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

标签： javaandroidandroid-fragmentswebviewview