健康栏目实现

一、运行效果图

二、核心代码

activity_main.xml

healty_layout_titlebar.xml

pagerofhealthy.xml

MainActivity.java

package com.example.health;

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

import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity
{

	private int currIndex;
	private TextView tvCursor;
	private TextView tvHealthNews;
	private TextView tvIllnessDefense;
	private ViewPager vpHealth;
	private ImageView ivHealthBack;
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initViews();
		initCursor();
		initViewPager();
		setListeners();
	}
	private void initViews()
	{
		ivHealthBack=(ImageView) findViewById(R.id.icon_health_back);
		tvCursor=(TextView) findViewById(R.id.cursor);
		tvHealthNews=(TextView) findViewById(R.id.tv_healthnews);
		tvIllnessDefense=(TextView) findViewById(R.id.tv_healthill);
		vpHealth=(ViewPager) findViewById(R.id.viewpager);
		
	}
	private void initCursor()
	{
		Display display=getWindow().getWindowManager().getDefaultDisplay();
		DisplayMetrics metrics=new DisplayMetrics();
		display.getMetrics(metrics);
		int tabLineLength=metrics.widthPixels/2;
		LayoutParams lp=(LayoutParams) tvCursor.getLayoutParams();
		lp.width=tabLineLength;
		tvCursor.setLayoutParams(lp);
	}
	private void initViewPager()
	{
		vpHealth=(ViewPager) findViewById(R.id.viewpager);
		Listviews=new ArrayList();
		views.add(new HealthWebView(this).getView("http://cms.hxky.cn/wap/jkxz"));
		views.add(new HealthWebView(this).getView("http://cms.hxky.cn/wap/jbfz"));
		vpHealth.setAdapter(new HealthViewPagerAdapter(views));
		vpHealth.setCurrentItem(0);
	}

	private void setListeners()
	{
		ivHealthBack.setOnClickListener(new OnClickListener(){
		public void onClick(View arg0){
			finish();
		}
		});
		tvHealthNews.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View view) {
				vpHealth.setCurrentItem(0);
			}
			
		});
		tvIllnessDefense.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View view) {
				// TODO Auto-generated method stub
				vpHealth.setCurrentItem(1);
			}
		
		});
		vpHealth.setOnPageChangeListener(new OnPageChangeListener(){
		public void onPageSelected(int position){
			currIndex=position;
		}
		public void onPageScrolled(int position,float percent,int ag2){
			LinearLayout.LayoutParams ll=(android.widget.LinearLayout.LayoutParams)tvCursor.getLayoutParams();
			if(currIndex==position){
				ll.leftMargin=(int)(currIndex*tvCursor.getWidth()+
						percent*tvCursor.getWidth());
				
			}else if(currIndex>position){
				ll.leftMargin=(int)(currIndex*tvCursor.getWidth()-
						(1-percent)*tvCursor.getWidth());
				
			}
			tvCursor.setLayoutParams(ll);
		}
		public void onPageScrollStateChanged(int position){
			
		}
	});
		
	}

	

	

	

	

}

HealthWebView.java

package com.example.health;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class HealthWebView
{
private Context context;
public HealthWebView(Context context){
	this.context=context;
	
}
public View getView(String url){
	View view=LayoutInflater.from(context).inflate(
			R.layout.pagerofhealth, null);
	WebView webView=(WebView) view.findViewById(R.id.wvHealth);
	webView.loadUrl(url);
	webView.getSettings().setJavaScriptEnabled(true);
	webView.setWebViewClient(new WebViewClient(){
		public boolean shouldOverrideUrlLoading(WebView view,String url){
			view.loadUrl(url);
			return true;
		}
	});
	return view;
}
}

HealthViewPagerAdapter.java

package com.example.health;

import java.util.List;

import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

public class HealthViewPagerAdapter extends PagerAdapter
{
private ListviewList;
public HealthViewPagerAdapter(ListviewList){
	this.viewList=viewList;
}
@Override
public int getCount()
{
	// TODO Auto-generated method stub
	return viewList.size();
}
@Override
public boolean isViewFromObject(View view, Object object)
{
	// TODO Auto-generated method stub
	return view==object;
}
@Override
public Object instantiateItem(ViewGroup container, int position)
{
	container.addView(viewList.get(position));
	return viewList.get(position);
}
public void destroyItem(ViewGroup container, int position, Object object)
{
	container.removeView(viewList.get(position));
}



}

三、运行中出现的问题

运行过程中出现一中截图问题，百度了好多经验但还是没有解决，找不到问题所在，希望老师帮助解决。