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Android開發基于ViewPager+GridView實現仿大眾點評橫向滑動功能

2019-12-12 05:13:44
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來源:轉載
供稿:網友

先給大家展示下效果圖,如果大家大家感覺不錯,請參考實現思路及代碼

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]滑動結束后,界面自動跳轉到當前選擇的界面中

2 介紹里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 arg

2),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;@Overrideprotected 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GridViewGridView gridView1 =(GridView) layoutInflater.inflate(R.layout.grid_fragment_home, null);MyGridViewAdapter myGridViewAdapter1 = new MyGridViewAdapter(0, 8);gridView1.setAdapter(myGridViewAdapter1);///定義第二個GridViewGridView gridView2 = (GridView)layoutInflater.inflate(R.layout.grid_fragment_home, null);MyGridViewAdapter myGridViewAdapter2 = new MyGridViewAdapter(1, 8);gridView2.setAdapter(myGridViewAdapter2);///定義第三個GridViewGridView 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PagerAdapterviewPagerHomeFragment.setAdapter(new PagerAdapter() {@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {// TODO Auto-generated method stubreturn arg0 == arg1;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn gridViews.size();}@Overridepublic void destroyItem(ViewGroup container, int position,Object object) {// TODO Auto-generated method stubcontainer.removeView(gridViews.get(position));//super.destroyItem(container, position, object);}@Overridepublic Object instantiateItem(ViewGroup container, int position) {// TODO Auto-generated method stubcontainer.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() {@Overridepublic void onPageScrollStateChanged(int position) {// TODO Auto-generated method stub}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {// TODO Auto-generated method stub}@Overridepublic void onPageSelected(int position) {// TODO Auto-generated method stubRadioButton radioButton = (RadioButton)radioGroup_index_fragment.getChildAt(position);radioButton.setChecked(true);}});}///定影GridView的Adapterpublic class MyGridViewAdapter extends BaseAdapter {private int page;private int count;public MyGridViewAdapter(int page, int count) {this.page = page;this.count = count;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn 8;}@Overridepublic Catogray getItem(int position) {// TODO Auto-generated method stubreturn catogarys.get(page * count + position);}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn 0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubViewHolder 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() {@Overridepublic void onClick(View view) {// TODO Auto-generated method stubToast.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;}}

以上所述是小編給大家介紹的Android開發仿大眾點評基于ViewPager+GridView實現橫向滑動功能,希望對大家有所幫助,如果大家有任何疑問請給我留言,小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持!

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