Android利用ViewPager仿微信主界面-android学习之旅(78)

首先是介绍ViewPager这个控件 ,这个控件需要pagerAdapter作为容器来提供数据,同时pagerAdapter的数据源是View数组

效果图如下

部分代码如下,实现如下的方法

mPagerAdapter = new PagerAdapter(){

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

            @Override
            public boolean isViewFromObject(View view, Object o) {
                return view == o;
            }

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

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

View数组就是几个LinearLayout,代码如下

 private List<View> mViews = new ArrayList<View>();
 View tab01 = inflater.inflate(R.layout.tab01,null);
        View tab02 = inflater.inflate(R.layout.tab02,null);
        View tab03 = inflater.inflate(R.layout.tab03,null);
        View tab04 = inflater.inflate(R.layout.tab04,null);
        mViews.add(tab01);
        mViews.add(tab02);
        mViews.add(tab03);
        mViews.add(tab04);

ViewPager的滑动点击事件

viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int i, float v, int i2) {

            }

            @Override
            public void onPageSelected(int i) {
                int currentItem = viewPager.getCurrentItem();
                resetImg();
                switch(currentItem){
                    case 0:
                        btnWeixin.setImageResource(R.drawable.tab_weixin_pressed);
                        break;
                    case 1:
                        btnFriend.setImageResource(R.drawable.tab_find_frd_pressed);
                        break;
                    case 2:
                        btnAddress.setImageResource(R.drawable.tab_address_pressed);
                        break;
                    case 3:
                        btnSetting.setImageResource(R.drawable.tab_settings_pressed);
                        break;
                    default:
                        break;
                }
            }

            @Override
            public void onPageScrollStateChanged(int i) {

            }
        });

仿微信主页面,实现的效果是滑动ViewPager的各个页面之后,下面的图标也是随着相应的界面变亮,然后点击底部,相应的页面也会跳转

点击底部跳转的逻辑在于代码,ViewPager对各个页面是从0开始编号的

 viewPager.setCurrentItem(1);

布局主要代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="45dp" android:gravity="center" android:background="@drawable/title_bar">
    <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="微信" android:textColor="#ffffff" android:textSize="20sp" android:layout_gravity="center" android:textStyle="bold"/>
</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="55dp" android:gravity="center" android:background="@drawable/bottom_bar" >
<LinearLayout  android: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/tab_weixin_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/tab_weixin_pressed" android:background="#00000000" android:clickable="false" />
    <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="微信" android:textColor="#ffffffff"/>
    </LinearLayout>
    <LinearLayout  android:id="@+id/tab_friend" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:orientation="vertical" >
        <ImageButton  android:id="@+id/tab_friend_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/tab_find_frd_normal" android:background="#00000000" android:clickable="false" />
        <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="朋友" android:textColor="#ffffffff"/>
    </LinearLayout>
    <LinearLayout  android: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/tab_address_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/tab_address_normal" android:background="#00000000" android:clickable="false" />
        <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="通讯录" android:textColor="#ffffffff"/>
    </LinearLayout>
    <LinearLayout  android: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/tab_setting_img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/tab_settings_normal" android:background="#00000000" android:clickable="false" />
        <TextView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设置" android:textColor="#ffffffff"/>
    </LinearLayout>

</LinearLayout>

<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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    >

   <include layout="@layout/top"/>
    <android.support.v4.view.ViewPager
        android: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>

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项目源码代码地址是

https://github.com/fengsehng/WeixinTest