android 常用Adapter复制就用

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/***2017/4/24 8:42*Created by jiangchen*作用：主activity*/public class MainActivity extends Activity {    private ListView mylistview;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mylistview = (ListView) findViewById(R.id.mylistview);        /**        *2017/4/24 8:55        *Created by jiangchen        *作用：ArrayAdapter能用来《展示》简单的数据源，展示一个数组里面的内容        */        //数据源        String[] arr={"这是arrayadapter","这是arrayadapter","这是arrayadapter"};        //系统的带有简单的textview的布局android.R.layout.simple_list_item_1        mylistview.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,arr));        //自己写的布局,用的是自己写的textview布局R.layout.layout，R.id.tv是布局里面textview的id        mylistview.setAdapter(new ArrayAdapter<String>(this,R.layout.layout,R.id.tv,arr));        /**        *2017/4/24 10:01        *Created by jiangchen        *作用：SimpleAdapter能用来《展示》复杂的数据源，展示List<Map<String,?>>集合里面的数据源        * Object，表示放所有数据类型都行        */        List<Map<String,Object>> mapList=new ArrayList<>();        Map<String,Object> map=new HashMap<>();        map.put("imgId",R.mipmap.ic_launcher);        map.put("text","这是SimpleAdapter");        mapList.add(map);        //new String[]{"imgId","text"}表示map里面<键名>的数组        // new int[]{R.id.img,R.id.tv}表示与其对应的<控件ID>        mylistview.setAdapter(new SimpleAdapter(this,mapList,R.layout.layout,                new String[]{"imgId","text"},new int[]{R.id.img,R.id.tv}));        /**        *2017/4/27 9:38        *Created by jiangchen        *作用：BaseAdapter能用来展示和操作复杂的数据，可以在adapter里面设各类事件        */        //添加数据        MyBean myBean=new MyBean();        myBean.setId(R.mipmap.ic_launcher);        myBean.setText("我最帅,没得争议");        List<MyBean> myBeanList=new ArrayList<>();        myBeanList.add(myBean);        //初始化适配器        MyBaseAdapter myBaseAdapter=new MyBaseAdapter(this,myBeanList);        //设置适配器        mylistview.setAdapter(myBaseAdapter);    }}

/** * Created by jiangchen on 2017/4/27- 9:02. * 说明： */public class MyBaseAdapter extends BaseAdapter {    Context context;            //全局上下文    List<MyBean> list;   //实体类集合    /**     * 带参构造，要传入ScannerActivity 实例来调用带参返回跳转方法     */    public MyBaseAdapter(Context context, List<MyBean> list) {        this.context = context;        this.list = list;    }    @Override    public int getCount() {        //获取item数量        if (list == null) {            return 0;        } else {            return list.size();        }    }    @Override    public Object getItem(int position) {        //获取item实例        return list.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(final int position, View convertView, ViewGroup parent) {        ViewHolder viewHolder;        //convertView合理利用缓存,第一次加载到缓存里，后面直接从缓存取        //《这样做的好处就是减少控件实例化次数，即findViewById次数》        if (convertView == null) {            viewHolder = new ViewHolder();            convertView = LayoutInflater.from(context).inflate(R.layout.layout, null);            viewHolder.imageView = (ImageView) convertView.findViewById(R.id.img);            viewHolder.textView = (TextView) convertView.findViewById(R.id.tv);            //存入            convertView.setTag(viewHolder);        } else {            //取出            viewHolder = (ViewHolder) convertView.getTag();        }        //最好做一个非空判断，以免炸穿        if (list.get(position)!=null){            viewHolder.textView.setText(list.get(position).getText());            viewHolder.imageView.setImageResource(list.get(position).getId());            //如果有点击事件，可以写在这里        }        return convertView;    }    //ViewHolder,存放控件实例,用静态的只会加载一次且最先加载    private static class ViewHolder {        ImageView imageView;        TextView textView;    }}

//这个是ViewPager配合Fragment所用的adapter  《注意要继承FragmentActivity》

public class GuidePageActivity extends FragmentActivity {    private ViewPager guideVp;    private List<Fragment> list;    private CirclePageIndicator indicator;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_guide_page);        guideVp = (ViewPager) findViewById(R.id.guide_vp);        list=new ArrayList<Fragment>();        initFragment();        //设置最大缓存页数，避免数据加载重复        guideVp.setOffscreenPageLimit(4);        VPAdapter vpAdapter=new VPAdapter(getSupportFragmentManager(),list);        guideVp.setAdapter(vpAdapter);        indicator = (CirclePageIndicator) findViewById(R.id.guide_indicator);        indicator.setViewPager(guideVp);    }    private void initFragment(){        list.add(new GuideFragment());        list.add(new GuideFragmentTwo());        list.add(new GuideFragmentThree());        list.add(new GuideFragmentFour());    }}

/** * Created by jiangchen  * need FragmentPagerAdapter ---> FragmentManager */public class VPAdapter extends FragmentPagerAdapter {    List<Fragment> list;    public VPAdapter(FragmentManager fm, List<Fragment> list) {        super(fm);        this.list=list;    }    @Override    public Fragment getItem(int position) {        return list.get(position);    }    @Override    public int getCount() {        return list.size();    }}

//还有个adapter用的不多，直接贴俩过来，懒得注释和修改了

/** * Created by JiangChen on 2016/12/20. * Emai:334967198@qq.com 这个是直接用来加载图片的viewPagerAdapter，把网址传进去，viewpager显示图片 */public class TuPianViewPagerAdapter extends PagerAdapter {    Context ctx = null;    List<String> pagerData = null;    public TuPianViewPagerAdapter(Context ct , List<String> data) {        ctx = ct;        pagerData = data;    }    /**     * Return the number of views available.     */    @Override    public int getCount() {        return pagerData.size();    }    /**     * Create the page for the given position.  The adapter is responsible     * for adding the view to the container given here, although it only     * must ensure this is done by the time it returns from     * {@link #finishUpdate(ViewGroup)}.     *     * @param container The containing View in which the page will be shown.     * @param position  The page position to be instantiated.     * @return Returns an Object representing the new page.  This does not     * need to be a View, but can be some other container of the page.     */    @Override    public Object instantiateItem(ViewGroup container, int position) {        Log.i("PagerAdapter" , "method instantiateItem be calling" );        // TODO: 2016/12/20 这里要写一个item来放图片        View v = LayoutInflater.from(ctx).inflate(R.layout.common_tupian_item , null);        ImageView img = (ImageView) v.findViewById(R.id.common_tupian_img);/*这里写item里面的那个imageview的id*/        Glide.with(ctx).load(pagerData.get(position)).into(img);        img.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                String arr[]=new String[pagerData.size()];                for (int i=0;i<pagerData.size();i++){                    arr[i]=pagerData.get(i);                }                    ctx.startActivity(new Intent(ctx,TupianShowActivity.class).putExtra("arr",arr));            }        });        container.addView(v);        return v;        //return super.instantiateItem(container, position);    }    /**     * Remove a page for the given position.  The adapter is responsible     * for removing the view from its container, although it only must ensure     * this is done by the time it returns from {@link #finishUpdate(ViewGroup)}.     *     * @param container The containing View from which the page will be removed.     * @param position  The page position to be removed.     * @param object    The same object that was returned by     *                  {@link #instantiateItem(View, int)}.     */    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        Log.i("PagerAdapter" , "method destroyItem be calling");        container.removeView((View)object);    }    /**     * Determines whether a page View is associated with a specific key object     * as returned by {@link #instantiateItem(ViewGroup, int)}. This method is     * required for a PagerAdapter to function properly.     *     * @param view   Page View to check for association with <code>object</code>     * @param object Object to check for association with <code>view</code>     * @return true if <code>view</code> is associated with the key object <code>object</code>     */    @Override    public boolean isViewFromObject(View view, Object object) {        return view == object;    }}

//还有一个BaseExpandableListAdapter是用来加载多级listview的那种adapter，也用的非常少，自行百度吧~

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