Android之Gallery和GridView两种方式与ImageSwitcher实现带预览的和幻灯片方式的两种图片浏览器

package cn.roco.gridview; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.ViewGroup.LayoutParams; import android.view.animation.AnimationUtils; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.GridView; import android.widget.ImageSwitcher; import android.widget.ImageView; import android.widget.SimpleAdapter; import android.widget.ViewSwitcher.ViewFactory; public class MyGridViewActivity extends Activity { int[] imageIDs = new int[] { R.drawable.beautiful_001, R.drawable.beautiful_002, R.drawable.beautiful_003, R.drawable.beautiful_004, R.drawable.beautiful_005, R.drawable.beautiful_006, R.drawable.beautiful_007, R.drawable.beautiful_008, R.drawable.beautiful_009, R.drawable.beautiful_010, R.drawable.beautiful_011, R.drawable.beautiful_012, R.drawable.beautiful_013 }; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.gridview); List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>(); for (int i = 0; i < imageIDs.length; i++) { Map<String, Object> listItem = new HashMap<String, Object>(); listItem.put("image", imageIDs[i]); listItems.add(listItem); } //获取显示拖的ImageSwitcher final ImageSwitcher switcher = (ImageSwitcher) findViewById(R.id.switcher); // 设置图片切换的动画效果 switcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in)); switcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out)); // 为ImageSwitch设置图片切换的图片 switcher.setFactory(new ViewFactory() { @Override public View makeView() { ImageView imageView = new ImageView(MyGridViewActivity.this); imageView.setBackgroundColor(0xff0000); imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); imageView.setLayoutParams(new ImageSwitcher.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); return imageView; } }); //创建一个SimpleAdapter //使用 /layout/cell.xml作为界面布局 SimpleAdapter simpleAdapter = new SimpleAdapter(this, listItems, R.layout.cell, new String[] { "image" }, new int[] { R.id.image1 }); GridView gridView = (GridView) findViewById(R.id.grid01); //为 GridView设置 simpleAdapter gridView.setAdapter(simpleAdapter); // 处理被选中事件 gridView.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { // 显示当前被选中的图片 switcher.setImageResource(imageIDs[position % imageIDs.length]); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); // 处理被点击事件 gridView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // 显示被单击的图片 switcher.setImageResource(imageIDs[position % imageIDs.length]); } }); } }