functionintroduction.java

package com.sogouchat.ui;

import java.util.ArrayList;


import com.sogouchat.R;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class functionintroduction extends Activity{
	private ViewPager mViewPager;
	private ImageView mPage0;
	private ImageView mPage1;
	public Button mBtnIntroduction;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.functionintroduction );
		mBtnIntroduction=(Button)findViewById(R.id.function_back);
		mBtnIntroduction.setOnClickListener(new OnClickListener()
		{
			public void onClick(View v) 
			{
				Intent intent = new Intent();
				intent.setClass(functionintroduction.this, SgAbout.class);
				startActivity(intent);
			}
		});
		mViewPager = (ViewPager) findViewById(R.id.function_viewpager);
		mViewPager.setOnPageChangeListener(new MyOnPageChangeListener());
		mPage0 = (ImageView) findViewById(R.id.page0);
		mPage1 = (ImageView) findViewById(R.id.page1);
		
		LayoutInflater mLi = LayoutInflater.from(this);
		View view1 = mLi.inflate(R.layout.introduction1, null);
		View view2 = mLi.inflate(R.layout.introduction2, null);
		
		final ArrayList<View> views = new ArrayList<View>();
		views.add(view1);
		views.add(view2);
		
		// 填充ViewPager的数据适配器
		PagerAdapter mPagerAdapter = new PagerAdapter() {

			@Override
			public boolean isViewFromObject(View arg0, Object arg1) {
				return arg0 == arg1;
			}

			@Override
			public int getCount() {
				return views.size();
			}

			@Override
			public void destroyItem(View container, int position, Object object) {
				((ViewPager) container).removeView(views.get(position));
			}

			@Override
			public Object instantiateItem(View container, int position) {
				((ViewPager) container).addView(views.get(position));
				return views.get(position);
			}
		};

		mViewPager.setAdapter(mPagerAdapter);
	}
	public class MyOnPageChangeListener implements OnPageChangeListener {
		@Override
		public void onPageSelected(int arg0) {
			switch (arg0) {
			case 0:
				mPage0.setImageDrawable(getResources().getDrawable(
						R.drawable.page_now));
				mPage1.setImageDrawable(getResources().getDrawable(
						R.drawable.page));
				break;
			case 1:
				mPage1.setImageDrawable(getResources().getDrawable(
						R.drawable.page_now));
				mPage0.setImageDrawable(getResources().getDrawable(
						R.drawable.page));
				break;
			}
		}

		@Override
		public void onPageScrolled(int arg0, float arg1, int arg2) {
		}

		@Override
		public void onPageScrollStateChanged(int arg0) {
		}
	}
}