ViewPager+GridView實現橫向滑動 仿大眾點評，viewpagergridview

ViewPager+GridView實現橫向滑動 仿大眾點評，viewpagergridview

先看演示效果：

1  ViewPager類提供了多界面切換的新效果。

新效果有如下特征： 
[1] 當前顯示一組界面中的其中一個界面。 
[2] 當用戶通過左右滑動界面時，當前的屏幕顯示當前界面和下一個界面的一部分。 

[3]滑動結束後，界面自動跳轉到當前選擇的界面中

2 介紹裡面幾個比較重要的方法與接口

    1,OnPageChangeListener  ViewPager頁面進行切換監聽接口  其中我們經常要實現public void onPageSelected(int arg0)，public void onPageScrolled(int arg0, float arg1, int arg2),public void onPageScrollStateChanged(int arg0)著三個方面，其中第一個方法是更多的用到;

    2,setCurrentItem(int item),來設置跳轉到當前的頁面;

    3,要顯示ViewPager,當然還少不了PagerAdapter類，進行適配;其中我們經常也要實現以下方法才可以:public void destroyItem(View arg0, int arg1, Object arg2),public int getCount(),public Object instantiateItem(View arg0, int arg1),public boolean isViewFromObject(View arg0, Object arg1),具體的使用方法等會看例子就ok了

 3 例子代碼

java代碼

package mm.shandong.com.testviewpagergrid;

import android.content.res.TypedArray;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

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

import mm.shandong.com.testviewpagergrid.entity.Catogray;

public class TestViewpagerGridActivity extends AppCompatActivity {
    ViewPager viewPagerHomeFragment;
    List<Catogray> catogarys;
    String[] catogary_names;
    int[] catogary_resourceIds;
    LayoutInflater layoutInflater;
    List<View> gridViews;
    RadioGroup radioGroup_index_fragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test_viewpager_grid);
        catogary_names = getResources().getStringArray(R.array.catogary_names);
        TypedArray typedArray = getResources().obtainTypedArray(R.array.catogary_resourceIds);
        catogary_resourceIds = new int[typedArray.length()];
        for (int i = 0; i < typedArray.length(); i++) {
            catogary_resourceIds[i] = typedArray.getResourceId(i, 0);
        }

        catogarys = new ArrayList<Catogray>();
        viewPagerHomeFragment = (ViewPager) findViewById(R.id.viewPagerHomeFragment);
        layoutInflater = getLayoutInflater();
        radioGroup_index_fragment =
                 (RadioGroup) findViewById(R.id.radioGroup_index_fragment);
        for (int i = 0; i < catogary_names.length; i++) {
            Catogray catogary = new Catogray();
            catogary.setName(catogary_names[i]);
            catogary.setImage_source(catogary_resourceIds[i]);
            catogarys.add(catogary);
        }
        initViewPager();
    }

    public void initViewPager() {

        gridViews = new ArrayList<View>();
        ///定義第一個GridView
        GridView gridView1 =
                (GridView) layoutInflater.inflate(R.layout.grid_fragment_home, null);
        MyGridViewAdapter myGridViewAdapter1 = new MyGridViewAdapter(0, 8);
        gridView1.setAdapter(myGridViewAdapter1);
        ///定義第二個GridView
        GridView gridView2 = (GridView)
                layoutInflater.inflate(R.layout.grid_fragment_home, null);
        MyGridViewAdapter myGridViewAdapter2 = new MyGridViewAdapter(1, 8);
        gridView2.setAdapter(myGridViewAdapter2);
        ///定義第三個GridView
        GridView gridView3 = (GridView)
                layoutInflater.inflate(R.layout.grid_fragment_home, null);
        MyGridViewAdapter myGridViewAdapter3 = new MyGridViewAdapter(2, 8);
        gridView3.setAdapter(myGridViewAdapter3);
        gridViews.add(gridView1);
        gridViews.add(gridView2);
        gridViews.add(gridView3);

      ///定義viewpager的PagerAdapter
        viewPagerHomeFragment.setAdapter(new PagerAdapter() {
            @Override
            public boolean isViewFromObject(View arg0, Object arg1) {
                // TODO Auto-generated method stub
                return arg0 == arg1;
            }
            @Override
            public int getCount() {
                // TODO Auto-generated method stub
                return gridViews.size();
            }
            @Override
            public void destroyItem(ViewGroup container, int position,
                                    Object object) {
                // TODO Auto-generated method stub
                container.removeView(gridViews.get(position));
                //super.destroyItem(container, position, object);
            }
            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                // TODO Auto-generated method stub
                container.addView(gridViews.get(position));
                return gridViews.get(position);
            }
        });
        ///注冊viewPager頁選擇變化時的響應事件
        viewPagerHomeFragment.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override
            public void onPageScrollStateChanged(int position) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageSelected(int position) {
                // TODO Auto-generated method stub
                RadioButton radioButton = (RadioButton)
                        radioGroup_index_fragment.getChildAt(position);
                radioButton.setChecked(true);
            }
        });
    }
    ///定影GridView的Adapter
    public class MyGridViewAdapter extends BaseAdapter {
        private int page;
        private int count;

        public MyGridViewAdapter(int page, int count) {
            this.page = page;
            this.count = count;
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return 8;
        }

        @Override
        public Catogray getItem(int position) {
            // TODO Auto-generated method stub
            return catogarys.get(page * count + position);
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            ViewHolder viewHolder = null;
            final Catogray catogary = catogarys.get(page * count + position);
            if (convertView == null) {
                viewHolder = new ViewHolder();
                convertView = layoutInflater.inflate(R.layout.grid_fragment_home_item, null);
                viewHolder.grid_fragment_home_item_img =
                        (ImageView) convertView.findViewById(R.id.grid_fragment_home_item_img);
                viewHolder.grid_fragment_home_item_txt =
                        (TextView) convertView.findViewById(R.id.grid_fragment_home_item_txt);
                convertView.setTag(viewHolder);
            } else {
                viewHolder = (ViewHolder) convertView.getTag();
            }
            viewHolder.grid_fragment_home_item_img.setImageResource(catogary.getImage_source());
            viewHolder.grid_fragment_home_item_txt.setText(catogary.getName());
            viewHolder.grid_fragment_home_item_img.
                    setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View view) {
                    // TODO Auto-generated method stub
                    Toast.makeText(TestViewpagerGridActivity.this,
                            catogary.getName(), Toast.LENGTH_SHORT).show();
                }


            });
            return convertView;
        }

    }
    public class ViewHolder {
        public ImageView grid_fragment_home_item_img;
        public TextView grid_fragment_home_item_txt;
    }
}

Demo下載
最後，以上例子都來源與安卓無憂，請去應用寶或者豌豆莢下載：http://android.myapp.com/myapp/detail.htm?apkName=com.shandong.mm.androidstudy，源碼例子文檔一網打盡。