安卓仿微信Tab页用Fragment实现

最终效果图如：

实现步骤：

新建项目tabdemo，我选的是4.0.3版本，然后依次新建三个Fragment，名字分别为：ChatFragment、FriendFragment、FindFragment，他会生成对应的界面布局xml文件。

项目资源管理器结构如下：

Drawable中是用到的三张图片，可自行找然后粘进去。

对应的Java代码如下：

package com.example.administrator.tabdemo;


import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;


public class ChatFragment extends Fragment {

    View mView;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        if (mView == null) {
            mView = inflater.inflate(R.layout.fragment_chat,null);
        }
        ((TextView)mView.findViewById(R.id.mTextView)).setText("聊天界面");
        return mView;
    }
}

package com.example.administrator.tabdemo;


import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class FriendFragment extends Fragment {
    View mView;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        if (mView == null) {
            mView = inflater.inflate(R.layout.fragment_friend,null);
        }
        ((TextView)mView.findViewById(R.id.ffTextView)).setText("好友界面");
        return mView;
    }
}

package com.example.administrator.tabdemo;


import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;


public class FindFragment extends Fragment {
    View mView;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        if (mView == null) {
            mView = inflater.inflate(R.layout.fragment_find,null);
        }
        ((TextView)mView.findViewById(R.id.sTextView)).setText("查找界面");
        return mView;
    }
}

对应的xml布局文件如下：

<FrameLayout 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"
    tools:context="com.example.administrator.tabdemo.ChatFragment">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/mTextView"
        android:layout_gravity="center" />

</FrameLayout>

<FrameLayout 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"
    tools:context="com.example.administrator.tabdemo.FriendFragment">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/ffTextView"
        android:layout_gravity="center" />

</FrameLayout>

<FrameLayout 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"
    tools:context="com.example.administrator.tabdemo.FindFragment">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/sTextView"
        android:layout_gravity="center" />

</FrameLayout>

另有顶部和底部，直接新建xml布局即可：
layout_bottom.xml和layout_top.xml分别如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:paddingTop="3dp"
    android:paddingBottom="3dp"
    android:background="@android:color/holo_green_light">

    <LinearLayout
        android:id="@+id/firstLinearLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center_horizontal"
        android:layout_weight="1">
        <ImageView
            android:id="@+id/firstImageView"
            android:background="@drawable/tab_weixin"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/firstTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="微信"
            />
    </LinearLayout>
    <LinearLayout
        android:id="@+id/secondLinearLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center_horizontal"
        android:layout_weight="1">
        <ImageView
            android:id="@+id/secondImageView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/tab_setting"/>
        <TextView
            android:id="@+id/secondTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="朋友"
            />
    </LinearLayout>
    <LinearLayout
        android:id="@+id/threeLinearLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center_horizontal"
        android:layout_weight="1">
        <ImageView
            android:id="@+id/threeImageView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/tab_find"/>
        <TextView
            android:id="@+id/threeTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="发现"
            />
    </LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingTop="3dp"
    android:paddingBottom="3dp"
    android:background="@android:color/darker_gray">

    <TextView
        android:id="@+id/ViewTitle"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="5dp"
        android:textSize="25sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

最后新建一个类ViewPagerFragmentAdapter继承自FragmentPagerAdapter，代码如下：

package com.example.administrator.tabdemo;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.util.Log;

import java.util.ArrayList;
import java.util.List;
public class ViewPagerFragmentAdapter extends FragmentPagerAdapter {

    private List<Fragment> mList = new ArrayList<Fragment>();
    public ViewPagerFragmentAdapter(FragmentManager fm , List<Fragment> list) {
        super(fm);
        this.mList = list;
    }

    @Override
    public Fragment getItem(int position) {
        return mList.get(position);
    }

    @Override
    public int getCount() {
        return mList != null ? mList.size() : 0;
    }
}

再是MainActivity类，代码如下：

package com.example.administrator.tabdemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.example.administrator.tabdemo.ChatFragment;
import com.example.administrator.tabdemo.FriendFragment;
import com.example.administrator.tabdemo.FindFragment;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private static final String TAG = "MainActivity.TAG";
    TextView titleTextView;
    public LinearLayout firstLinearLayout;
    public LinearLayout secondLinearLayout;
    public LinearLayout threeLinearLayout;
    ViewPager mViewPager;
    ViewPagerFragmentAdapter mViewPagerFragmentAdapter;
    FragmentManager mFragmentManager;

    String[] titleName = new String[] {"微信","朋友","发现"};
    List<Fragment> mFragmentList = new ArrayList<Fragment>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mFragmentManager = getSupportFragmentManager();
        setContentView(R.layout.activity_main);
        initFragmetList();
        mViewPagerFragmentAdapter = new ViewPagerFragmentAdapter(mFragmentManager,mFragmentList);
        initView();
        initViewPager();
    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    public void initViewPager() {
        mViewPager.addOnPageChangeListener(new ViewPagetOnPagerChangedLisenter());
        mViewPager.setAdapter(mViewPagerFragmentAdapter);
        mViewPager.setCurrentItem(0);
        titleTextView.setText(titleName[0]);
        updateBottomLinearLayoutSelect(true,false,false);
    }

    public void initFragmetList() {
        Fragment chat = new ChatFragment();
        Fragment friend = new FriendFragment();
        Fragment find = new FindFragment();
        mFragmentList.add(chat);
        mFragmentList.add(friend);
        mFragmentList.add(find);
    }

    public void initView() {
        titleTextView = (TextView) findViewById(R.id.ViewTitle);
        mViewPager = (ViewPager) findViewById(R.id.ViewPagerLayout);
        firstLinearLayout = (LinearLayout) findViewById(R.id.firstLinearLayout);
        firstLinearLayout.setOnClickListener(this);
        secondLinearLayout = (LinearLayout) findViewById(R.id.secondLinearLayout);
        secondLinearLayout.setOnClickListener(this);
        threeLinearLayout = (LinearLayout) findViewById(R.id.threeLinearLayout);
        threeLinearLayout.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.firstLinearLayout:
                mViewPager.setCurrentItem(0);
                updateBottomLinearLayoutSelect(true,false,false);
                break;
            case R.id.secondLinearLayout:
                mViewPager.setCurrentItem(1);
                updateBottomLinearLayoutSelect(false,true,false);
                break;
            case R.id.threeLinearLayout:
                mViewPager.setCurrentItem(2);
                updateBottomLinearLayoutSelect(false,false,true);
                break;
            default:
                break;
        }
    }
    private void updateBottomLinearLayoutSelect(boolean f, boolean s, boolean t) {
        firstLinearLayout.setSelected(f);
        secondLinearLayout.setSelected(s);
        threeLinearLayout.setSelected(t);
    }
    class ViewPagetOnPagerChangedLisenter implements ViewPager.OnPageChangeListener {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            //            Log.d(TAG,"onPageScrooled");
        }
        @Override
        public void onPageSelected(int position) {
            Log.d(TAG,"onPageSelected");
            boolean[] state = new boolean[titleName.length];
            state[position] = true;
            titleTextView.setText(titleName[position]);
            updateBottomLinearLayoutSelect(state[0],state[1],state[2]);
        }
        @Override
        public void onPageScrollStateChanged(int state) {
            Log.d(TAG,"onPageScrollStateChanged");
        }
    }
}

完整代码下载