如何使侧面导航栏与Playstore一样

时间:2020-11-02 15:22:12

标签: android android-studio

我想使侧面导航栏与启用backpress的playotre一样。 与在Goggle Play商店应用中一样,打开应用时会显示HomeFragment /主屏幕,但侧面导航栏中未显示/提及HomeFragment。 我想要在我的应用中使用此东西。

而且,如果我们移至“我的应用”,则在此之后按“后退”按钮移至HomeFragment。

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这是Play商店的HomeFragment /主屏幕。在红色圆圈中,您可以看到开放式导航栏上的Humburger图标。

enter image description here

在图片2中,我们可以看到它们没有显示或提及HomeFragment / Home屏幕。

1 个答案:

答案 0 :(得分:1)

如果您的意思是Navigation View,请看以下示例: 这是主要的xml文件(要在其中放置布局的布局),它将是drawer layout

<?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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
tools:openDrawer="start"
android:id="@+id/drawer_layout">

a toolbar instead of action bar and the relative layout will just debug the bugs
<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="?attr/actionBarSize">
<androidx.appcompat.widget.Toolbar
    android:id="@+id/toolBar"
    android:background="#9C27B0"
    android:layout_width="fill_parent"
    android:layout_height="?attr/actionBarSize"/>
</RelativeLayout>

this is the navigation view
<com.google.android.material.navigation.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="320dp"
    android:layout_height="fill_parent"
    android:layout_gravity="start"
    app:menu="@menu/nav_view_menu"
    app:headerLayout="@layout/nav_header"/>

</androidx.drawerlayout.widget.DrawerLayout>

tools:openDrawer="start"代表菜单在左侧或右侧出现的位置, nav headernavigation_view顶部的图片 ,app:menunavigation_view菜单


这是主要活动:

import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.drawerlayout.widget.DrawerLayout;

import android.os.Bundle;
import android.view.MenuItem;

import com.google.android.material.navigation.NavigationView;

public class MainActivity extends AppCompatActivity {

DrawerLayout drawerLayout ;
NavigationView navigationView ;
ActionBarDrawerToggle actionBarDrawerToggle ;

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

    //this will make toolbar instead of action bar
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolBar) ;
    setSupportActionBar(toolbar);

    drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout) ;

    navigationView = (NavigationView) findViewById(R.id.nav_view) ;

    // if user select item from the navigation view it will be detected here
    navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
            switch (menuItem.getItemId()){
                case R.id.item1 : System.out.println("item 1 selected") ; break;
                case R.id.item2 : System.out.println("item 2 selected") ; break;
            }
            return true;
        }
    });

    // this is important part to add button in the toolbar
    actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.open_nav,R.string.close_nav) ;

    actionBarDrawerToggle.syncState();

    drawerLayout.setDrawerListener(actionBarDrawerToggle) ;
}
}

这是nav_header

<?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="170dp"
android:background="#4CAF50">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:text="this is nav header"
    android:textSize="40sp" />

</RelativeLayout>

layout_height是首选170


并且您必须创建一个像这样的菜单:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">

you create a group and dont't forget to set checkable beavior to single and then
add your items
<group android:checkableBehavior="single">
    <item android:id="@+id/item1" android:title="this is item1" />
    <item android:id="@+id/item2" android:title="this is item2"/>
</group>

</menu>

tools:showIn="navigation_view非常重要!


在此之前,您必须在implementation 'com.android.support:design:28.0.0'文件的依赖项中添加build.gradle (moudle)


并将其添加到您的strings.xml文件中: <string name="open_nav">navigation_view_opened</string> <string name="close_nav">navigation_view_closed</string>


要隐藏action bar(非常重要),请对您的styles.xml执行此操作:

<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>
_________________________________________________________________________________ 代码结果:

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enter image description here