Gallery图片滑动循环

package com.homer.gallery; import android.app.Activity; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.widget.AdapterView; import android.widget.Gallery; import android.widget.Toast; public class GalleryActivity extends Activity { private ImageAdapter imgAdapter = null; // 声明图片资源对象 private Gallery gallery = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); gallery = (Gallery) findViewById(R.id.gallery); imgAdapter = new ImageAdapter(this); gallery.setAdapter(imgAdapter); // 设置图片资源 gallery.setGravity(Gravity.CENTER_HORIZONTAL); // 设置水平居中显示 gallery.setSelection(imgAdapter.imgs.length * 100); // 设置起始图片显示位置（可以用来制作gallery循环显示效果） gallery.setOnItemClickListener(clickListener); // 设置点击图片的监听事件（需要用手点击才触发，滑动时不触发） gallery.setOnItemSelectedListener(selectedListener); // 设置选中图片的监听事件（当图片滑到屏幕正中，则视为自动选中） gallery.setUnselectedAlpha(0.3f); // 设置未选中图片的透明度 gallery.setSpacing(40); // 设置图片之间的间距 } // 点击图片的监听事件 AdapterView.OnItemClickListener clickListener = new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(GalleryActivity.this, "点击图片 " + (position + 1), 100).show(); } }; // 选中图片的监听事件 AdapterView.OnItemSelectedListener selectedListener = new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(GalleryActivity.this, "选中图片 " + (position + 1), 20).show(); } @Override public void onNothingSelected(AdapterView<?> arg0) { } }; }