ViewPager滑动页面的制作

一时失言乱红尘 2022-08-07 14:59 191阅读 0赞

1、主界面：

![Image 1][]

直接看代码：

package com.test.guideactivity;
    
    import java.util.ArrayList;
    
    import android.app.Activity;
    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.util.Log;
    import android.view.LayoutInflater;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ImageView;
    import android.widget.LinearLayout;
    
    public class MainActivity extends Activity implements OnPageChangeListener {
    	private ViewPager viewPager;
    	private ViewPagerAdapter adapter;
    	
    	private int currentIndex;
    	private ArrayList<View> list;
    	private ImageView[] dots;
    	private LinearLayout linear;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		initViews();
    		initDot();
    		
    	}
    	
    	
    	private void initViews(){
    		viewPager = (ViewPager) this.findViewById(R.id.viewpager);
    		linear = (LinearLayout) this.findViewById(R.id.linearlayout);
    		//构造显示的对象
    		LayoutInflater inflater = LayoutInflater.from(this);
    		list = new ArrayList<View>();
    		list.add(inflater.inflate(R.layout.guide1, null));
    		list.add(inflater.inflate(R.layout.guide2, null));
    		list.add(inflater.inflate(R.layout.guide3, null));
    		adapter = new ViewPagerAdapter(list);
    		//绑定显示的数据
    		viewPager.setAdapter(adapter);
    		//设定监听器，当滑动时候进行处理点点的改变
    		viewPager.setOnPageChangeListener(this);
    	}
    	
    <span style="color:#003333;">	private void initDot(){
    		if(linear == null){
    			Log.e("LinearLayout", "linear == null");
    			return;
    		}
    		dots = new ImageView[list.size()];
    		for(int i=0;i<list.size();i++){
    			dots[i] = (ImageView) linear.getChildAt(i);
    			//首先初始化，全部设为不可用时
    			dots[i].setEnabled(false);
    		}
    		//设置当前第一个可用
    		currentIndex = 0;
    		dots[currentIndex].setEnabled(true);
    	}</span>
    	
    	/**
    	 * ViewPager的构造器，继承PagerAdapter
    	 * @author dsw
    	 *
    	 */
    	class ViewPagerAdapter extends PagerAdapter{
    		private ArrayList<View> views;
    		
    		public ViewPagerAdapter(ArrayList<View> views){
    			this.views = views;
    		}
    		
    		@Override
    		public int getCount() {
    			return views == null ? 0 :views.size();
    		}
    
    		@Override
    		public boolean isViewFromObject(View arg0, Object arg1) {
    			return arg0 == arg1;
    		}
    
    		@Override
    		public void destroyItem(ViewGroup container, int position, Object object) {
    			if(views != null){
    				container.removeView(views.get(position));
    			}
    		}
    
    		@Override
    		public Object instantiateItem(ViewGroup container, int position) {
    			if(views != null){
    				container.addView(views.get(position));
    				return views.get(position);
    			}
    			return super.instantiateItem(container, position);
    		}
    		
    		
    	}
    	
    	
    	@Override
    	public void onPageScrollStateChanged(int arg0) {
    		// 页面状态改变的时候
    		Log.v("onPageScrollStateChanged", "arg0:" + arg0);
    		
    	}
    
    
    	@Override
    	public void onPageScrolled(int arg0, float arg1, int arg2) {
    		// 页面滑动的时候
    		Log.v("onPageScrolled", "arg0:" + arg0 + "arg1:" + arg1 + "arg2:" + arg2 );
    		
    	}
    
    
    	@Override
    <span style="color:#003300;">	public void onPageSelected(int arg0) {
    		// 当页面选中的时候
    		Log.v("onPageSelected", "arg0:" + arg0);
    		if (arg0 < 0 || arg0 > list.size() - 1
    				|| currentIndex == arg0)
    		{
    			return;
    		}
    		
    		dots[arg0].setEnabled(true);  //设置选中可用
    		dots[currentIndex].setEnabled(false);	//设置上一个不可用
    		currentIndex= arg0;
    	}</span>
    }

源码地址： [点击打开链接][Link 1]

[Image 1]: 
[Link 1]: http://download.csdn.net/detail/anlidengshiwei/8604253