【IMOOC学习笔记】多种多样的App主界面Tab实现方法(一)

1.ViewPager实现Tab

首先实现底部和底部布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="45dp"
    android:background="@drawable/title_bar"
    android:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="微信"
        android:textColor="#ffffff"
        android:textSize="20sp"
        android:textStyle="bold" />

</LinearLayout>

底部布局

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

    <LinearLayout
        android:id="@+id/id_tab_weixin"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        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="#00000000"
            android:clickable="false"
            android:src="@drawable/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="fill_parent"
        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="#00000000"
            android:clickable="false"
            android:src="@drawable/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="fill_parent"
        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="#00000000"
            android:clickable="false"
            android:src="@drawable/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_settings"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageButton
            android:id="@+id/id_tab_settings_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#00000000"
            android:clickable="false"
            android:src="@drawable/tab_settings_normal" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="设置"
            android:textColor="#ffffff" />
    </LinearLayout>

</LinearLayout>

注意这里将LinearLayout中的子View  ImageButton 的clickable设置为false,这样才能使得整个LiearLayout 响应点击事件 

activity_main.xml

<LinearLayout 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:orientation="vertical" >

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

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

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

</LinearLayout>

每一个tab页面，这里只列举一个，其他的都相似

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

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center"
        android:text="This is Weixin Tab"
        android:textSize="30sp"
        android:textStyle="bold" />

</LinearLayout>

 MainActivity类

package com.imooc.tab01;

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

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ImageButton;
import android.widget.LinearLayout;

public class MainActivity extends Activity implements OnClickListener {

    private ViewPager mViewPager;
    private PagerAdapter mAdapter;
    private List<View> mViews = new ArrayList<View>(); 
    //用来保存view的数组
    // TAB

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

    private ImageButton mWeixinImg;
    private ImageButton mFrdImg;
    private ImageButton mAddressImg;
    private ImageButton mSettingImg;

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

        initView();

        initEvents();

    }

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

        mViewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override
            public void onPageSelected(int arg0) {
                int currentItem = mViewPager.getCurrentItem();
                resetImg();
                switch (currentItem) {
                case 0:
                    mWeixinImg.setImageResource(R.drawable.tab_weixin_pressed);
                    break;
                case 1:
                    mFrdImg.setImageResource(R.drawable.tab_find_frd_pressed);
                    break;
                case 2:
                    mAddressImg
                            .setImageResource(R.drawable.tab_address_pressed);
                    break;
                case 3:
                    mSettingImg
                            .setImageResource(R.drawable.tab_settings_pressed);
                    break;

                }

            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });
    }

    private void initView() {
        mViewPager = (ViewPager) findViewById(R.id.id_viewpager);
        // tabs
        mTabWeixin = (LinearLayout) findViewById(R.id.id_tab_weixin);
        mTabFrd = (LinearLayout) findViewById(R.id.id_tab_frd);
        mTabAddress = (LinearLayout) findViewById(R.id.id_tab_address);
        mTabSetting = (LinearLayout) findViewById(R.id.id_tab_settings);
        // ImageButton
        mWeixinImg = (ImageButton) findViewById(R.id.id_tab_weixin_img);
        mFrdImg = (ImageButton) findViewById(R.id.id_tab_frd_img);
        mAddressImg = (ImageButton) findViewById(R.id.id_tab_address_img);
        mSettingImg = (ImageButton) findViewById(R.id.id_tab_settings_img);

        LayoutInflater mInflater = LayoutInflater.from(this);
        View tab01 = mInflater.inflate(R.layout.tab01, null);
        View tab02 = mInflater.inflate(R.layout.tab02, null);
        View tab03 = mInflater.inflate(R.layout.tab03, null);
        View tab04 = mInflater.inflate(R.layout.tab04, null);
        mViews.add(tab01);
        mViews.add(tab02);
        mViews.add(tab03);
        mViews.add(tab04);

        mAdapter = new PagerAdapter() {

            @Override
            public void destroyItem(ViewGroup container, int position,
                    Object object) {
                container.removeView(mViews.get(position));
            }

            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                View view = mViews.get(position);
                container.addView(view);
                return view;
            }

            @Override
            public boolean isViewFromObject(View arg0, Object arg1) {
                return arg0 == arg1;
            }

            @Override
            public int getCount() {
                return mViews.size();
            }
        };

        mViewPager.setAdapter(mAdapter);

    }

    @Override
    public void onClick(View v) {
        resetImg();
        switch (v.getId()) {
        case R.id.id_tab_weixin:
            mViewPager.setCurrentItem(0);
            mWeixinImg.setImageResource(R.drawable.tab_weixin_pressed);
            break;
        case R.id.id_tab_frd:
            mViewPager.setCurrentItem(1);
            mFrdImg.setImageResource(R.drawable.tab_find_frd_pressed);
            break;
        case R.id.id_tab_address:
            mViewPager.setCurrentItem(2);
            mAddressImg.setImageResource(R.drawable.tab_address_pressed);
            break;
        case R.id.id_tab_settings:
            mViewPager.setCurrentItem(3);
            mSettingImg.setImageResource(R.drawable.tab_settings_pressed);
            break;

        default:
            break;
        }
    }

    private void resetImg() {
        mWeixinImg.setImageResource(R.drawable.tab_weixin_normal);
        mFrdImg.setImageResource(R.drawable.tab_find_frd_normal);
        mAddressImg.setImageResource(R.drawable.tab_address_normal);
        mSettingImg.setImageResource(R.drawable.tab_settings_normal);
    }

}

 这样就实现了即可以滑动也可以点击tab实现页面的转换

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