菜單不向下滑動

Question

我是 android 開發的初學者，我正在創建一個簡單的網絡應用程序，我有一個包含 100 個字符串/條目的菜單/抽屜，但我無法向下滑動，我想我從代碼中刪除了一些東西，但不要不知道什么這是一張圖片，這是來自active_main.xml的代碼

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout 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/drawer_layout"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:fitsSystemWindows="true"
   tools:openDrawer="start">
    <WebView
       android:id="@+id/activity_main_webview"
       android:layout_width="match_parent"
       android:layout_height="match_parent" />
    <com.google.android.material.navigation.NavigationView
       android:id="@+id/nav_view"
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:layout_gravity="start"
       android:fitsSystemWindows="true"
       app:headerLayout="@layout/nav_header_main"
       app:menu="@menu/activity_main_drawer" />

    <include
       layout="@layout/app_bar_main"
       android:layout_width="match_parent"
       android:layout_height="match_parent" />

</androidx.drawerlayout.widget.DrawerLayout>

和MainActivity.java

package com.example.psalms;

import android.os.Bundle;
import android.view.View;
import android.view.Menu;
import android.webkit.WebSettings;
import android.webkit.WebView;

import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import com.google.android.material.navigation.NavigationView;

import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;

public class MainActivity extends AppCompatActivity {
    private WebView mWebView;
    private AppBarConfiguration mAppBarConfiguration;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);
        mWebView = (WebView) findViewById(R.id.activity_main_webview);
        // Enable Javascript
        WebSettings webSettings = mWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        mWebView.loadUrl("file:///android_asset/index.html");
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }
}

提前致謝！

Answer 1

只需從此activity_main.xml 中刪除Web 視圖並將其放置在@layout/app_bar_main或Content_main.xml 中的某個位置，然后將包含標簽移動到導航視圖上方。它會解決您的問題。

<include
       layout="@layout/app_bar_main"
       android:layout_width="match_parent"
       android:layout_height="match_parent" />    
<com.google.android.material.navigation.NavigationView
       android:id="@+id/nav_view"
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:layout_gravity="start"
       android:fitsSystemWindows="true"
       app:headerLayout="@layout/nav_header_main"
       app:menu="@menu/activity_main_drawer" />