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
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
android:layout_width="match_parent" android:layout_height="match_parent"> android:layout_width="match_parent" android:layout_height="match_parent"> android:layout_width="match_parent" android:layout_height="match_parent"> android:id="@+id/vp_scroll" android:layout_width="match_parent" android:layout_height="wrap_content" /> android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/vp_scroll" android:text="其他内容" android:textSize="50dp" />
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，所以我们需要重写ScrollView
DisScrollView
package 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 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
* @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 = 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
DisGridView
package com.lgl.baiduwallpaper.view;
import android.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_V ALUE >> 2, MeasureSpec.A T_MOST);
super.onMeasure(widthMeasureSpec, height);
}
}
然后我们就可以写布局了
home_fragment.xml
android:layout_width="match_parent" android:layout_height="match_parent"> android:id="@+id/disScroolView" android:layout_width="match_parent" android:layout_height="match_parent"> android:layout_width="match_parent" android:layout_height="match_parent"> android:id="@+id/vp_scroll" android:layout_width="match_parent" android:layout_height="wrap_content" /> android:horizontalSpacing="10dp" android:verticalSpacing="10dp" android:numColumns="2" android:id="@+id/gridview" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/vp_scroll" />
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开源看是SmartImageView
开源地址：https://https://www.wendangku.net/doc/6911233025.html,/loopj/android-smart-image-view
既然要使用GridView,那就必须要有一个实体类和一个item吧
HomeGrid
package 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) {
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{" +
"img=" + img +
", type='" + type + '\'' +
'}';
}
}
grid_item.xml
android:layout_width="match_parent" android:layout_height="200dp" android:orientation="vertical"> android:id="@+id/mySmartImageView" android:layout_width="wrap_content" android:layout_height="match_parent" /> android:id="@+id/tv_nice" android:layout_width="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" android:textSize="16sp" />
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(https://www.wendangku.net/doc/6911233025.html,YOUT_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) {
ViewHolder viewHolder;
//第一次加载
if (convertView == null) {
convertView = inflater.inflate(https://www.wendangku.net/doc/6911233025.html,yout.grid_item, null);
viewHolder = new ViewHolder();
viewHolder.img = (SmartImageView) convertView.findViewById(R.id.mySmartImageView);
https://www.wendangku.net/doc/6911233025.html, = (TextView) convertView.findViewById(https://www.wendangku.net/doc/6911233025.html,_nice);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
// viewHolder.img.setImageResource(gridData.get(position).getImg());
viewHolder.img.setBackgroundResource(gridData.get(position).getImg());
https://www.wendangku.net/doc/6911233025.html,.setText(gridData.get(position).getType());
//动态设置高度
https://www.wendangku.net/doc/6911233025.html,ams(new
https://www.wendangku.net/doc/6911233025.html,youtParams(https://www.wendangku.net/doc/6911233025.html,youtParams.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.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
android:clickable="true" android:background="@drawable/bottom_select" android:layout_below="@+id/gridview" android:layout_width="match_parent" android:layout_height="wrap_content"> android:layout_centerInParent="true" android:gravity="center" android:layout_width="wrap_content" android:layout_height="wrap_content"> android:src="@drawable/image_more_icon_feedback" android:layout_width="wrap_content" android:layout_height="wrap_content" /> android:layout_marginLeft="5dp" android:text="意见反馈" android:textSize="18sp" android:layout_width="wrap_content" android:layout_height="wrap_content" /> bottom_select.xml HomeFragment package 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 https://www.wendangku.net/doc/6911233025.html,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 com.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 myViewPager; private ArrayList private DisGridView mGridView; private ArrayList private DisScrollView disScroolView; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(https://www.wendangku.net/doc/6911233025.html,yout.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(); initGridData(); 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 grid = 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(https://www.wendangku.net/doc/6911233025.html,yout.vp_seroll_item, null); view1.findViewById(R.id.vpImg).setBackgroundResource(R.mipmap.img1); bitmap.add(view1); LayoutInflater inflater2 = getActivity().getLayoutInflater(); View view2 = inflater2.inflate(https://www.wendangku.net/doc/6911233025.html,yout.vp_seroll_item, null); view2.findViewById(R.id.vpImg).setBackgroundResource(R.mipmap.img2); bitmap.add(view2); LayoutInflater inflater3 = getActivity().getLayoutInflater(); View view3 = inflater3.inflate(https://www.wendangku.net/doc/6911233025.html,yout.vp_seroll_item, null); view3.findViewById(R.id.vpImg).setBackgroundResource(R.mipmap.img3); bitmap.add(view3); LayoutInflater inflater4 = getActivity().getLayoutInflater(); View view4 = inflater4.inflate(https://www.wendangku.net/doc/6911233025.html,yout.vp_seroll_item, null); 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.findViewById(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; } @Override 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 bitmap.get(position); } } /** * 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(https://www.wendangku.net/doc/6911233025.html,YOUT_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) { ViewHolder viewHolder; //第一次加载 if (convertView == null) { convertView = inflater.inflate(https://www.wendangku.net/doc/6911233025.html,yout.grid_item, null); viewHolder = new ViewHolder(); viewHolder.img = (SmartImageView) convertView.findViewById(R.id.mySmartImageView); https://www.wendangku.net/doc/6911233025.html, = (TextView) convertView.findViewById(https://www.wendangku.net/doc/6911233025.html,_nice); convertView.setTag(viewHolder); } else { viewHolder = (ViewHolder) convertView.getTag(); } // viewHolder.img.setImageResource(gridData.get(position).getImg()); viewHolder.img.setBackgroundResource(gridData.get(position).getImg()); https://www.wendangku.net/doc/6911233025.html,.setText(gridData.get(position).getType()); //动态设置高度 convertView.setLayoutParams(new https://www.wendangku.net/doc/6911233025.html,youtParams(https://www.wendangku.net/doc/6911233025.html,youtParams.MATCH_PARENT,300)); return convertView; } } private static class ViewHolder { private SmartImageView img; private TextView tv; } } 好了，我们首页就已经做好了，是不是非常的简单尼？在我们的分析之后，其实这个软件也就那么回事哈