Android--- Drawer and Tab Navigation with ViewPager

Android--- Drawer and Tab Navigation

  • Tab Navigation --- View Pager+ Fragment + TabLayout
    • 关于ViewPager
    • Tab Navigation
  • Drawer Navigation

Tab Navigation — View Pager+ Fragment + TabLayout

关于ViewPager

  • ViewPager是一个可以实现横向滑动的组件, 如图片横向滑动和页面横向滑动

ViewPager2

  • ViewPager2是ViewPager的升级版
  • ViewPager2内部实现是RecyclerView,所以ViewPager2的性能更高
  • ViewPager2可以实现竖向滑动,ViewPager只能横向滑动。
  • ViewPager2模式实现了懒加载,默认不进行预加载。内部是通过Lifecycle 对 Fragment 的生命周期进行管理。ViewPager会进行预加载,懒加载需要我们自己去实现
  • ViewPager2只有一个adapter,FragmentStateAdapter继承自RecyclerView.Adapter。
    而ViewPager有两个adapter,FragmentStatePagerAdapter和FragmentPagerAdapter,均是继承PagerAdapter

Tab Navigation

  1. 定义布局文件

<androidx.coordinatorlayout.widget.CoordinatorLayout 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=".activity.MainActivity">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/Theme.EatWhat.AppBarOverlay">


        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize" />

        <com.google.android.material.tabs.TabLayout
            android:id="@+id/mainTabBar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

    com.google.android.material.appbar.AppBarLayout>

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintTop_toBottomOf="@id/mainTabBar"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" >


    androidx.viewpager.widget.ViewPager>


    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_marginEnd="@dimen/fab_margin"
        android:layout_marginBottom="16dp"
        app:srcCompat="@drawable/ic_baseline_add_24" />


androidx.coordinatorlayout.widget.CoordinatorLayout>
  1. 构建Adapter
package com.example.eatwhat.adapter;

import android.content.Context;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;

import com.example.eatwhat.mainActivityFragments.NotesFragment;
import com.example.eatwhat.mainActivityFragments.RestaurantFragment;
import com.example.eatwhat.mainActivityFragments.TodaysFragment;

public class MainTabAdapter extends FragmentPagerAdapter {
    private Context myContext;
    private FragmentManager myManager;
    int totalTabs;

    public MainTabAdapter(Context context, FragmentManager fm,  int totalTabs) {
        super(fm);
        myManager = fm;
        myContext = context;
        this.totalTabs = totalTabs;
    }

    @NonNull
    @Override
    public Fragment getItem(int position) {

        switch (position) {
            case 0:
                RestaurantFragment restaurantFragment = new RestaurantFragment();
                return restaurantFragment;
            case 1:
                NotesFragment notesFragment = new NotesFragment();
                return notesFragment;
            case 2:
                TodaysFragment todaysFragment = new TodaysFragment();
                return todaysFragment;

            default:
                return null;
        }
    }


    @Override
    public int getCount() {
        return totalTabs;
    }
}

  1. 在Activit中构建Tab
private void createTabsFragment() {
        //navigation button
        toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        toolbar.setNavigationIcon(R.drawable.ic_baseline_menu_24);
		
		//add tab names
        tabLayout = (TabLayout) findViewById(R.id.mainTabBar);
        viewPager = (ViewPager) findViewById(R.id.viewPager);

   
        tabLayout.addTab(tabLayout.newTab().setText("Restaurants"));
        tabLayout.addTab(tabLayout.newTab().setText("Posts"));
        tabLayout.addTab(tabLayout.newTab().setText("Today's"));

        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

        final MainTabAdapter adapter = new MainTabAdapter(this, getSupportFragmentManager(), tabLayout.getTabCount());
        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));

        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });
    }

Android--- Drawer and Tab Navigation with ViewPager_第1张图片

Drawer Navigation

  1. 定义menu布局

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <group
        android:id="@+id/drawer_menu_top"
        android:checkableBehavior="none">

        <item android:id="@+id/drawer_home"
            android:checkable="true"
            android:title="Home"
            android:icon="@drawable/drawer_home_24"/>

        <item android:id="@+id/drawer_profile"
            android:checkable="true"
            android:title="My Profile"
            android:icon="@drawable/drawer_myprofile_24"
            />

        <item android:id="@+id/drawer_postes"
            android:checkable="true"
            android:title="My Posts"
            android:icon="@drawable/drawer_reviewhistory_24"
            />

        <item android:id="@+id/drawer_collected_restaurant"
            android:checkable="true"
            android:title="Collected Restaurant"
            android:icon="@drawable/drawer_myposts_24"
            />
        <item android:id="@+id/drawer_liked_Post"
            android:checkable="true"
            android:title="Liked Post"
            android:icon="@drawable/ic_baseline_thumb_up_24"
            />
    group>

    <group
        android:id="@+id/drawer_menu_bottom"
        android:checkableBehavior="none">
        <item android:id="@+id/drawer_logout"
            android:checkable="true"
            android:title="Log out"
            android:icon="@drawable/drawer_logout_24"
            />
    group>
menu>
  1. 定义Header布局

<androidx.constraintlayout.widget.ConstraintLayout
    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"
    >

    <de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/drawer_avatar"
        android:layout_width="90dp"
        android:layout_height="90dp"
        android:layout_gravity="center"
        android:layout_marginTop="20sp"
        android:src="@mipmap/eatwhat_logo"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/drawer_username"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="20sp"
        android:textIsSelectable="true"
        android:text="Group 4"
        android:textAppearance="?attr/textAppearanceHeadline6"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/drawer_avatar" />


androidx.constraintlayout.widget.ConstraintLayout>
  1. 定义drawer布局

<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=".activity.MainActivity"
    tools:openDrawer="start"
    android:id="@+id/drawer_layout"
    >

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

    <com.google.android.material.navigation.NavigationView
        android:id="@+id/drawer_view"
        app:menu="@menu/drawer_menu"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/drawer_header"
        />

androidx.drawerlayout.widget.DrawerLayout>

Android--- Drawer and Tab Navigation with ViewPager_第2张图片

  1. Activity中构建drawer
 private void createDrawer() {
 	setContentView(R.layout.drawer_layout);
    myDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    myNavigationView = (NavigationView) findViewById(R.id.drawer_view);
    myNavigationView.setNavigationItemSelectedListener(this);
 }
  1. Activity重写onOptionsItemSelected
  • 实现点击左上角图标打开drawer navigation
 @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch(item.getItemId()) {
            case android.R.id.home:
                myDrawerLayout.openDrawer(GravityCompat.START);
                return true;
        }

        return super.onOptionsItemSelected(item);
    }
  1. Activity实现 NavigationView.OnNavigationItemSelectedListener接口
  • 对drawer菜单中每个选项赋予功能
@Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch(item.getItemId()) {
            case R.id.drawer_home:
                myDrawerLayout.closeDrawer(GravityCompat.START);
                return true;
            case R.id.drawer_profile:
                Intent toProfile = new Intent(this, ProfileActivity.class);
                startActivityForResult(toProfile, USER_NAME_CODE);
                return true;
            case R.id.drawer_postes:
                Intent toMyNotes = new Intent(this, MyNotesActivity.class);
                startActivity(toMyNotes);
                return true;
            case R.id.drawer_logout:
                FirebaseAuth.getInstance().signOut();
                Intent logoutIntent = new Intent(this, SignInActivity.class);
                startActivity(logoutIntent);
                finish();
                return true;
            case R.id.drawer_collected_restaurant:
                Intent toCollected = new Intent(this, CollectedRestaurantActivity.class);
                startActivity(toCollected);
                return true;
            case R.id.drawer_liked_Post:
                Intent toLikedNotes = new Intent(this, LikedNotesActivity.class);
                startActivity(toLikedNotes);
                return true;
        }
        return false;
    }

Android--- Drawer and Tab Navigation with ViewPager_第3张图片
Android--- Drawer and Tab Navigation with ViewPager_第4张图片

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