实现可以滑动的GrildView，类似美团网首页的GrildView功能菜单

首先上实现效果图，不会做动态图，就先凑合着看吧



使用了网上的一个开源控件viewpagerindicator,可以自定义切换时候显示的标记，圆点，或者下划线。

GrildView显示的是手机上的全部app，根据计算好的每页显示的数量来动态添加adapter.

public void initViews() {
final PackageManager packageManager = getPackageManager();
final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
// get all apps
final List<ResolveInfo> apps = packageManager.queryIntentActivities(mainIntent, 0);
// the total pages
final int PageCount = (int)Math.ceil(apps.size()/APP_PAGE_SIZE);
array = new ArrayList<GridView>();
for (int i=0; i<PageCount; i++) {
GridView appPage = new GridView(this);
appPage.setAdapter(new AppAdapter(this, apps, i));
appPage.setNumColumns(4);
array.add(appPage);
}
}

下方显示的切换标记其实两行代码就可以搞定了。

mIndicator = (LinePageIndicator)findViewById(R.id.indicator);
mIndicator.setViewPager(viewPager);

然后布局文件中要引用这个自定义View

<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:background="@android:color/white"
android:orientation="vertical" >

<android.support.v4.view.ViewPager
android:id="@+id/myviewpager"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_gravity="center"
android:scaleType="fitXY" />

<LinearLayout
android:id="@+id/liner1"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:orientation="horizontal"

></LinearLayout>

<com.viewpagerindicator.LinePageIndicator
android:id="@+id/indicator"
android:layout_width="fill_parent"
android:layout_height="10dp"
android:padding="10dip" />

</LinearLayout>

ViewPage滑动Adapter,这个里面可以自定义需求，比如说，你要实现一个可以无限循环滑动的view,那么你可以把最大数量设为500或者1000更大的然后需要处理好异常，addview跟removeview

package cn.example.adapter;

import java.util.List;
import com.viewpagerindicator.IconPagerAdapter;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.GridView;
public class MyViewPagerAdapter extends PagerAdapter implements
IconPagerAdapter {
private List<GridView> array;

/**
* 供外部调用（new）的方法
*
* @param context
*            上下文
* @param imageViews
*            添加的序列对象
*/
public MyViewPagerAdapter(Context context, List<GridView> array) {
this.array = array;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return array.size();
}

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}

@Override
public Object instantiateItem(View arg0, int arg1) {
View view = array.get(arg1);
((ViewPager) arg0).addView(array.get(arg1));
return view;
}

@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}

@Override
public int getIconResId(int index) {
// TODO Auto-generated method stub
return 0;
}

}

实现GrildView点击事件

package cn.example.adapter;

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

import cn.example.activity.R;
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class AppAdapter extends BaseAdapter {
private List<ResolveInfo> mList;// 定义一个list对象
private Context mContext;// 上下文
public static final int APP_PAGE_SIZE = 8;// 每一页装载数据的大小
private PackageManager pm;// 定义一个PackageManager对象

/**
* 构造方法
*
* @param context
*            上下文
* @param list
*            所有APP的集合
* @param page
*            当前页
*/
public AppAdapter(Context context, List<ResolveInfo> list, int page) {
mContext = context;
pm = context.getPackageManager();
mList = new ArrayList<ResolveInfo>();
// 根据当前页计算装载的应用，每页只装载8个
int i = page * APP_PAGE_SIZE;// 当前页的其实位置
int iEnd = i + APP_PAGE_SIZE;// 所有数据的结束位置
while ((i < list.size()) && (i < iEnd)) {
mList.add(list.get(i));
i++;
}
}

public int getCount() {
// TODO Auto-generated method stub
return mList.size();
}

public Object getItem(int position) {
// TODO Auto-generated method stub
return mList.get(position);
}

public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(
R.layout.app_item, parent, false);
}
final ResolveInfo appInfo = mList.get(position);
ImageView appicon = (ImageView) convertView
.findViewById(R.id.ivAppIcon);
final TextView appname = (TextView) convertView
.findViewById(R.id.tvAppName);
appicon.setImageDrawable(appInfo.loadIcon(pm));
appname.setText(appInfo.loadLabel(pm));
convertView.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(mContext, "点击了" + appInfo.loadLabel(pm),
Toast.LENGTH_SHORT).show();
}
});
return convertView;
}

}

稍后贴出下载连接,CSDN上传出现问题，有需要的可以留邮箱给我。