GuideActivity.java

package com.partynetwork.iparty.app.ui;

import java.util.ArrayList;
import java.util.List;

import com.partynetwork.iparty.R;


import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;

/**
 * 引导界面
 *
 */
public class GuideActivity extends Activity implements OnPageChangeListener {

	private ViewPager vp;
	private ViewPagerAdapter vpAdapter;
	private List<View> views;

	// 记录当前选中位置
	private int currentIndex;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.guide);

		// 初始化页面
		initViews();

		// 初始化底部小点
		initDots();
	}

	private void initViews() {
		LayoutInflater inflater = LayoutInflater.from(this);

		views = new ArrayList<View>();
		// 初始化引导图片列表
		views.add(inflater.inflate(R.layout.what_new_one, null));
		views.add(inflater.inflate(R.layout.what_new_two, null));
		views.add(inflater.inflate(R.layout.what_new_three, null));
		views.add(inflater.inflate(R.layout.what_new_four, null));
		views.add(inflater.inflate(R.layout.what_new_five, null));
		// 初始化Adapter
		vpAdapter = new ViewPagerAdapter(views, this);
		
		vp = (ViewPager) findViewById(R.id.viewpager);
		vp.setAdapter(vpAdapter);
		// 绑定回调
		vp.setOnPageChangeListener(this);
	}

	private void initDots() {
		currentIndex = 0;
	}

	private void setCurrentDot(int position) {
		if (position < 0 || position > views.size() - 1
				|| currentIndex == position) {
			return;
		}
		currentIndex = position;
	}

	// 当滑动状态改变时调用
	@Override
	public void onPageScrollStateChanged(int arg0) {
	}

	// 当当前页面被滑动时调用
	@Override
	public void onPageScrolled(int arg0, float arg1, int arg2) {
	}

	// 当新的页面被选中时调用
	@Override
	public void onPageSelected(int arg0) {
		setCurrentDot(arg0);
	}

}