Question

以下是创建导航抽屉的一些代码。问题是抽屉没有正确显示。从活动开始时可以看到抽屉，但只是部分抽屉，它不会从侧面滑入和滑出。它只是在一个地方静止不动。这有什么不对？

注意：我已在NoActionBar

中写下styles.xml删除了操作栏

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<
android.support.v4.widget.DrawerLayout
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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.nirvan.navigationexample3.MainActivity">


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

   <
   android.support.design.widget.NavigationView
   android:layout_width="wrap_content"
   android:layout_height="match_parent"
   android:id="@+id/nv"
   >


   <ListView
       android:layout_width="200dp"
       android:layout_height="match_parent"
       android:id="@+id/listView"></ListView>

   </android.support.design.widget.NavigationView>

mainActivity.java

package com.example.nirvan.navigationexample3;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends AppCompatActivity
{

@Override
protected void onCreate(Bundle savedInstanceState)
   {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    ListView ls=(ListView)findViewById(R.id.listView);
    String[] values=
    {"one","two","three","four","five","six","seven","eight"};


    ArrayAdapter<String> adapter=new ArrayAdapter(this, 
    R.layout.item,values);
    ls.setAdapter(adapter);
   }
 }

item.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

</TextView>

Answer 1

像这样编辑你的布局文件：

    <android.support.v4.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">


        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:fitsSystemWindows="false">

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

      <include layout="@layout/nav_header_main"
                    android:id="@+id/my"/>
                <ListView

                    android:layout_weight="7"
                    android:layout_width="match_parent"
                    android:layout_height="0dp"
                    android:id="@+id/list_view_inside_nav"></ListView>
            </LinearLayout>
        </android.support.design.widget.NavigationView>

    </android.support.v4.widget.DrawerLayout>

Answer 2

除了Luiz Fernando的回复，别忘了把

 </android.support.v4.widget.DrawerLayout>

在XML文件的末尾。

为什么导航抽屉的代码不起作用？

2 个答案: