BaseAdapter + Gallery

galleryAdapter.java

package com.example.administrator.gallery;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;/** * Created by Administrator on 2015/7/23. */public class galleryAdapter extends BaseAdapter{    private int[] resId;    private Context mContext;    public galleryAdapter(int[] resId,Context mContext) {        this.resId = resId;        this.mContext = mContext;    }    @Override    public int getCount() {//        return resId.length;        return Integer.MAX_VALUE; //让gallery循环，所以设置为最大数    }    @Override    public Object getItem(int position) {        return resId[position];    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ImageView img = new ImageView(mContext);//        img.setBackgroundResource(resId[position]);        img.setBackgroundResource(resId[position % resId.length]); //循环        //设置缩放//        img.setLayoutParams(new Gallery.LayoutParams(300,400));//        img.setScaleType(ImageView.ScaleType.FIT_XY);        return img;    }}

MainActivity.java

package com.example.administrator.gallery;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.Gallery;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.ViewSwitcher;public class MainActivity extends ActionBarActivity implements ViewSwitcher.ViewFactory{    private Gallery gallery;    private ImageSwitcher switcher;    private int[] resId = new int[]{R.drawable.item1,R.drawable.item2,R.drawable.item3,R.drawable.item4,R.drawable.item5,R.drawable.item6,R.drawable.item7,R.drawable.item8,R.drawable.item9,R.drawable.item10,R.drawable.item11,R.drawable.item12};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        gallery = (Gallery)findViewById(R.id.gallery);        switcher = (ImageSwitcher)findViewById(R.id.switcher);        galleryAdapter adapter = new galleryAdapter(resId,this);        gallery.setAdapter(adapter);        gallery.setOnItemSelectedListener(new Gallery.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {//                img.setBackgroundResource(resId[position % resId.length]); //循环                switcher.setBackgroundResource(resId[position % resId.length]);            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });        //ImageSwitcher加载工厂        switcher.setFactory(this);        //动画效果        switcher.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));        switcher.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out));    }    @Override    public View makeView() {        ImageView img = new ImageView(this);        img.setScaleType(ImageView.ScaleType.FIT_CENTER);        return img;    }}