ViewPager+FragmentPageAdapter实现可

作者: A_Coder | 来源:发表于2016-11-08 20:14 被阅读0次

ViewPager+FragmentPageAdapter实现可
目标管理法则SMART
人生格言
实现可拖拽插件
可重复读实现
俞敏洪来告诉你，他的成功靠什么
可实现可不实现的生活
封装一个通用的事件监听函数
Redis实现消息队列的方式
2-1迭代对象、迭代器、生成器

首先创建首页布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#C3C3C3"
    tools:context="news.huoren.com.themap.MainActivity">

    <include layout="@layout/top"/>

    <android.support.v4.view.ViewPager
        android:id="@+id/id_viewpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        ></android.support.v4.view.ViewPager>

    <include layout="@layout/bottom" />
</LinearLayout>

底部栏布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:background="@drawable/bottom_bar"
    android:layout_width="match_parent"
    android:layout_height="55dp">

    <LinearLayout
        android:id="@+id/id_tab_weixin"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical">

        <ImageButton
            android:id="@+id/id_tab_weixin_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#000"
            android:clickable="false"
            android:src="@mipmap/tab_weixin_pressed"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="微信"
            android:textColor="#ffffff"/>

    </LinearLayout>
    <LinearLayout
        android:id="@+id/id_tab_frd"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical">

        <ImageButton
            android:id="@+id/id_tab_frd_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#000"
            android:clickable="false"
            android:src="@mipmap/tab_find_frd_normal"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="朋友"
            android:textColor="#ffffff"/>

    </LinearLayout>
    <LinearLayout
        android:id="@+id/id_tab_address"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical">

        <ImageButton
            android:id="@+id/id_tab_address_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#000"
            android:clickable="false"
            android:src="@mipmap/tab_address_normal"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="通讯录"
            android:textColor="#ffffff"/>

    </LinearLayout>
    <LinearLayout
        android:id="@+id/id_tab_setting"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical">

        <ImageButton
            android:id="@+id/id_tab_setting_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#000"
            android:clickable="false"
            android:src="@mipmap/tab_settings_normal"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="微信"
            android:textColor="#ffffff"/>

    </LinearLayout>

</LinearLayout>

主界面的Activity：

package news.huoren.com.themap;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.LinearLayout;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private ViewPager viewPager;
    private FragmentPagerAdapter adapter;
    private List<Fragment> fragmentList;

    private LinearLayout mTabWeixin;
    private LinearLayout mTabFrd;
    private LinearLayout mTabAddress;
    private LinearLayout mTabSetting;

    private ImageButton mImgFrd;
    private ImageButton mImgAddress;
    private ImageButton mImgSetting;
    private ImageButton mImgWeixin;


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

        initView();
        initEvent();
    }

    private void initEvent() {
        mTabWeixin.setOnClickListener(this);
        mTabFrd.setOnClickListener(this);
        mTabAddress.setOnClickListener(this);
        mTabSetting.setOnClickListener(this);
    }

    private void initView() {
        viewPager = (ViewPager) findViewById(R.id.id_viewpager);

        mTabWeixin = (LinearLayout) findViewById(R.id.id_tab_weixin);
        mTabAddress = (LinearLayout) findViewById(R.id.id_tab_address);
        mTabFrd = (LinearLayout) findViewById(R.id.id_tab_frd);
        mTabSetting = (LinearLayout) findViewById(R.id.id_tab_setting);

        mImgWeixin = (ImageButton) findViewById(R.id.id_tab_weixin_img);
        mImgFrd = (ImageButton) findViewById(R.id.id_tab_frd_img);
        mImgAddress = (ImageButton) findViewById(R.id.id_tab_address_img);
        mImgSetting = (ImageButton) findViewById(R.id.id_tab_setting_img);

        fragmentList = new ArrayList<Fragment>();
        Fragment mtab1 = new WeixinFragment();
        Fragment mtab2 = new FrdFragment();
        Fragment mtab3 = new AddressFragment();
        Fragment mtab4 = new SettingFragment();
        fragmentList.add(mtab1);
        fragmentList.add(mtab2);
        fragmentList.add(mtab3);
        fragmentList.add(mtab4);
        adapter = new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                return fragmentList.get(position);
            }

            @Override
            public int getCount() {
                return fragmentList.size();
            }
        };
        viewPager.setAdapter(adapter);
        //设置viewpager的page切换监听
        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }
            //同步底部栏tab切换page
            @Override
            public void onPageSelected(int position) {
                int currentViewpage = viewPager.getCurrentItem();
                setTab(currentViewpage);

            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }

    //设置点击的tab切换图标
    private void setTab(int currentViewpage) {
        resetImg();
        switch (currentViewpage) {
            case 0:
                mImgWeixin.setImageResource(R.mipmap.tab_weixin_pressed);
                break;
            case 1:
                mImgFrd.setImageResource(R.mipmap.tab_find_frd_pressed);
                break;
            case 2:
                mImgAddress.setImageResource(R.mipmap.tab_address_pressed);
                break;
            case 3:
                mImgSetting.setImageResource(R.mipmap.tab_settings_pressed);
                break;
        }

    }
    //初始化底部tab
    private void resetImg() {
        mImgWeixin.setImageResource(R.mipmap.tab_weixin_normal);
        mImgFrd.setImageResource(R.mipmap.tab_find_frd_normal);
        mImgAddress.setImageResource(R.mipmap.tab_address_normal);
        mImgSetting.setImageResource(R.mipmap.tab_settings_normal);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.id_tab_weixin:
                select(0);
                break;
            case R.id.id_tab_frd:
                select(1);
                break;
            case R.id.id_tab_address:
                select(2);
                break;
            case R.id.id_tab_setting:
                select(3);
                break;
        }
    }
    //点击设置相应的图标和viewPager
    private void select(int i) {
        setTab(i);
        viewPager.setCurrentItem(i);
    }
}