仿百度壁纸客户端(三)——首页单向,双向事件冲突处理,壁纸列表的实现

1、仿百度壁纸客户端（三）首页单向，双向事件冲突处理，壁纸列表的实现一.ScrollView和ViewPager滑动事件冲突的解决办法我们仔细想想，我们的主页架构，首先他是上下滑动的，所以这样要一个ScrollView，然后就是轮播图和其他内容了，这样的话，上下滑动有事件，轮播图也有事件，我们先看下xml的实现原理home_fragment_xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android=" android:layout_width=&q

2、uot;match_parent" android:layout_height="match_parent"> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent"> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent">

3、; <com.lgl.baiduwallpaper.view.VPScrollLayout android:id="+id/vp_scroll" android:layout_width="match_parent" android:layout_height="wrap_content" /> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:l

4、ayout_below="+id/vp_scroll" android:text="其他内容" android:textSize="50dp" /> </RelativeLayout> </ScrollView></RelativeLayout>這裡很清晰的可以看出层级关系了，他事件冲突时必然的，解决办法也是很简单，就单以这个架构来讲的话，其实只要判断他是上下滑动还是左右滑动就好，如果是左右滑动，就不给ScrollView传递事件了，如果是上下滑动的话，让ScrollView自身来处理了，所以

5、我们需要重写ScrollViewDisScrollViewpackage com.lgl.baiduwallpaper.view;import android.content.Context;import android.util.AttributeSet;import android.view.MotionEvent;import android.widget.ScrollView;/* * 事件冲突解决 * Created by lgl on 16/4/3. */public class DisScrollView extends ScrollView /手指按下的开始坐标 private

6、 float startX, startY; /手指移动的移动坐标 private float currentX, currentY; /手指抬起的最后坐标 private float endX, endY; /手指按下后的移动距离 private float distanceX,distanceY; /* * 构造方法 * * param context * param attrs */ public DisScrollView(Context context, AttributeSet attrs) super(context, attrs); /* * 事件分发 * * param ev

7、 * return */ Override public boolean dispatchTouchEvent(MotionEvent ev) return super.dispatchTouchEvent(ev); /* * 事件拦截 * * param ev * return */ Override public boolean onInterceptTouchEvent(MotionEvent ev) switch (ev.getAction() /按下事件 case MotionEvent.ACTION_DOWN: /获取坐标 startX = ev.getX(); startY =

8、ev.getY(); break; /移动事件 case MotionEvent.ACTION_MOVE: /获取坐标 currentX = ev.getX(); currentY = ev.getY(); distanceX += Math.abs(currentX - startX); distanceY += Math.abs(currentY - startY); startX = currentX; startY = currentY; /判断滑动方向 if(distanceX >distanceY) /左右滑动， /不拦截事件 return false; break; /上下

9、移动自身处理 return super.onInterceptTouchEvent(ev); OK，我们运行一下关键是把逻辑处理好二.GridView实现壁纸列表1.ScrollView和GridView事件冲突我们可以看看百度壁纸的效果，我们也来实现一下我们要实现的就是下面的一个壁纸列表，这里我们就要考虑一下了，怎么去实现，实际上，不管是ScrollView还是GridView他们都是内存超出屏幕才回去执行滑动事件，这样的话，我们自定义一个GridView把高直接写好就可以了DisGridViewpackage com.lgl.baiduwallpaper.view;import andro

10、id.content.Context;import android.util.AttributeSet;import android.widget.GridView;/* * 事件冲突 * Created by lgl on 16/4/3. */public class DisGridView extends GridView /* * 事件冲突 * * param context * param attrs */ public DisGridView(Context context, AttributeSet attrs) super(context, attrs); /* * View的测

11、量，获得页面的整体尺寸 * * param widthMeasureSpec * param heightMeasureSpec */ Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) int height = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, height); 然后我们就可以写布局了home_f

12、ragment.xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android=" android:layout_width="match_parent" android:layout_height="match_parent"> <com.lgl.baiduwallpaper.view.DisScrollView android:id="+id/disScroolView" a

13、ndroid:layout_width="match_parent" android:layout_height="match_parent"> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent"> <com.lgl.baiduwallpaper.view.VPScrollLayout android:id="+id/vp_scroll" andr

14、oid:layout_width="match_parent" android:layout_height="wrap_content" /> <com.lgl.baiduwallpaper.view.DisGridView android:horizontalSpacing="10dp" android:verticalSpacing="10dp" android:numColumns="2" android:id="+id/gridview" android:

15、layout_width="match_parent" android:layout_height="match_parent" android:layout_below="+id/vp_scroll" /> </RelativeLayout> </com.lgl.baiduwallpaper.view.DisScrollView></RelativeLayout>现在触摸事件已经OK了2.实现壁纸列表这里我们没有借口，就使用本地的壁纸了，但是完全都是按照网络请求操作来的，这里使用的解析图片的

16、开源看是SmartImageView开源地址：既然要使用GridView,那就必须要有一个实体类和一个item吧HomeGridpackage com.lgl.baiduwallpaper.entity;/* * GridView数据实体类 * Created by lgl on 16/4/3. */public class HomeGrid /* * 当我们开发的时候，这里应该是个接口，那应该是String类型 * 我们现在模拟的是本地的图片，所以是int */ public HomeGrid() super(); public HomeGrid(String type, int img)

17、this.type = type; this.img = img; private int img; /描述 private String type; public int getImg() return img; public void setImg(int img) this.img = img; public String getType() return type; public void setType(String type) this.type = type; Override public String toString() return "HomeGrid"

18、; + "img=" + img + ", type='" + type + ''' + '' grid_item.xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android=" android:layout_width="match_parent" android:layout_height="200dp" andro

19、id:orientation="vertical"> <com.loopj.android.image.SmartImageView android:id="+id/mySmartImageView" android:layout_width="wrap_content" android:layout_height="match_parent" /> <TextView android:id="+id/tv_nice" android:layout_width="

20、;match_parent" android:layout_height="40dp" android:layout_alignParentBottom="true" android:alpha="0.3" android:background="#000" android:gravity="left|center_vertical" android:paddingLeft="15dp" android:textColor="#fff" andr

21、oid:textSize="16sp" /></RelativeLayout>然后我们回到HomeFragment中，我们定义一个方法initGridData /* * 初始化GridView的数据 */ private void initGridData() for (int i = 0; i < 10; i+) HomeGrid grid = new HomeGrid(); grid.setImg(R.drawable.nice); grid.setType("美女"); gridData.add(grid); 现在可以定义一

22、个adapter了 /* * GridView的adapter */ private class GridViewAdapter extends BaseAdapter private Context context; private LayoutInflater inflater; /* * 构造方法 * * param context */ public GridViewAdapter(Context context) this.context = context; inflater = (LayoutInflater) context.getSystemService(Context.L

23、AYOUT_INFLATER_SERVICE); Override public int getCount() return gridData.size(); Override public Object getItem(int position) return gridData.get(position); Override public long getItemId(int position) return position; Override public View getView(int position, View convertView, ViewGroup parent) Vie

24、wHolder viewHolder; /第一次加载 if (convertView = null) convertView = inflater.inflate(R.layout.grid_item, null); viewHolder = new ViewHolder(); viewHolder.img = (SmartImageView) convertView.findViewById(R.id.mySmartImageView); viewHolder.tv = (TextView) convertView.findViewById(R.id.tv_nice); convertVie

25、w.setTag(viewHolder); else viewHolder = (ViewHolder) convertView.getTag(); / viewHolder.img.setImageResource(gridData.get(position).getImg(); viewHolder.img.setBackgroundResource(gridData.get(position).getImg(); viewHolder.tv.setText(gridData.get(position).getType(); /动态设置高度 convertView.setLayoutPam

26、s(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT,300); return convertView; private static class ViewHolder private SmartImageView img; private TextView tv;但是还是有一些细节需要处理的，比图scroolview一进来需要回滚到第一行/设置每次进入现最前面disScroolView.smoothScrollTo(0,0);看代码应该就能看的很清晰了吧，我们来演示一下有一点小粗糙，这就需要各位自己去完善了三

27、.意见反馈我们滑动到最后会发现，有一个意见反馈，我们去实现它在这里我们先不做跳转，先只是十点他的点击效果吧，也是相当点击简单，我们只要在DisGridView加上一个布局 <RelativeLayout android:clickable="true" android:background="drawable/bottom_select" android:layout_below="+id/gridview" android:layout_width="match_parent" android:layout

28、_height="wrap_content"> <LinearLayout android:layout_centerInParent="true" android:gravity="center" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageView android:src="drawable/image_more_icon_feedback&q

29、uot; android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:layout_marginLeft="5dp" android:text="意见反馈" android:textSize="18sp" android:layout_width="wrap_content" android:layout_height="wra

30、p_content" /> </LinearLayout> </RelativeLayout>bottom_select.xml<?xml version="1.0" encoding="utf-8"?><selector xmlns:android=" <item android:drawable="drawable/image_more_subitems_bottom_selected" android:state_enabled="true&qu

31、ot; android:state_pressed="true"></item> <item android:drawable="drawable/image_more_subitems_bottom_selected" android:state_pressed="true"></item> <item android:state_pressed="false" android:drawable="drawable/image_more_subitems_

32、bottom"></item></selector>HomeFragmentpackage com.lgl.baiduwallpaper.fragment;import android.content.Context;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.view.La

33、youtInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.BaseAdapter;import android.widget.TextView;import com.lgl.baiduwallpaper.R;import com.lgl.baiduwallpaper.entity.HomeGrid;import com.lgl.baiduwallpaper.view.DisGridView;import c

34、om.lgl.baiduwallpaper.view.DisScrollView;import com.lgl.baiduwallpaper.view.VPScrollLayout;import com.loopj.android.image.SmartImageView;import java.util.ArrayList;/* * 主页 * Created by lgl on 16/3/31. */public class HomeFragment extends Fragment private VPScrollLayout vpScroll; private ViewPager myV

35、iewPager; private ArrayList<View> bitmap = new ArrayList<View>(); private DisGridView mGridView; private ArrayList<HomeGrid> gridData = new ArrayList<HomeGrid>(); private DisScrollView disScroolView; Override public View onCreateView(LayoutInflater inflater, ViewGroup contain

36、er, Bundle savedInstanceState) View view = inflater.inflate(R.layout.home_fragment, container, false); findView(view); return view; Override public void onActivityCreated(Bundle savedInstanceState) super.onActivityCreated(savedInstanceState); init(); /* * 初始化 */ private void init() initVPData(); ini

37、tGridData(); myViewPager.setAdapter(new MyAdapter(); /设置几秒轮播 vpScroll.setPagerFromTime(1000); /设置adapter mGridView.setAdapter(new GridViewAdapter(getActivity(); /设置每次进入现最前面 disScroolView.smoothScrollTo(0,0); /* * 初始化GridView的数据 */ private void initGridData() for (int i = 0; i < 10; i+) HomeGrid g

38、rid = new HomeGrid(); grid.setImg(R.drawable.nice); grid.setType("美女"); gridData.add(grid); /* * 初始化图片 */ private void initVPData() LayoutInflater inflater1 = getActivity().getLayoutInflater(); View view1 = inflater1.inflate(R.layout.vp_seroll_item, null); view1.findViewById(R.id.vpImg).se

39、tBackgroundResource(R.mipmap.img1); bitmap.add(view1); LayoutInflater inflater2 = getActivity().getLayoutInflater(); View view2 = inflater2.inflate(R.layout.vp_seroll_item, null); view2.findViewById(R.id.vpImg).setBackgroundResource(R.mipmap.img2); bitmap.add(view2); LayoutInflater inflater3 = getAc

40、tivity().getLayoutInflater(); View view3 = inflater3.inflate(R.layout.vp_seroll_item, null); view3.findViewById(R.id.vpImg).setBackgroundResource(R.mipmap.img3); bitmap.add(view3); LayoutInflater inflater4 = getActivity().getLayoutInflater(); View view4 = inflater4.inflate(R.layout.vp_seroll_item, n

41、ull); view4.findViewById(R.id.vpImg).setBackgroundResource(R.mipmap.img4); bitmap.add(view4); /* * 绑定 * * param view */ private void findView(View view) vpScroll = (VPScrollLayout) view.findViewById(R.id.vp_scroll); /直接拿到 myViewPager = vpScroll.getViewPager(); mGridView = (DisGridView) view.findView

42、ById(R.id.gridview); disScroolView = (DisScrollView) view.findViewById(R.id.disScroolView); /* * adapter */ private class MyAdapter extends PagerAdapter Override public int getCount() return bitmap.size(); Override public boolean isViewFromObject(View view, Object object) return view = object; Overr

43、ide public void destroyItem(ViewGroup container, int position, Object object) / super.destroyItem(container, position, object); /删除 (ViewPager) container).removeView(bitmap.get(position); Override public Object instantiateItem(ViewGroup container, int position) (ViewPager) container).addView(bitmap.get(position); return b