1，主布局文件
android:layout_width=”match_parent”
android:layout_height=”match_parent”
android:orientation=”vertical”
>
android:layout_width=”match_parent”
android:layout_height=”wrap_content”>
android:id=”@+id/activity_viewpager_tab1_tv”
android:layout_width=”0dp”
android:layout_weight=”1″
android:layout_height=”wrap_content”
android:textSize=”30dp”
android:gravity=”center”
android:text=”页签1″/>
android:id=”@+id/activity_viewpager_tab2_tv”
android:layout_width=”0dp”
android:layout_weight=”1″
android:layout_height=”wrap_content”
android:textSize=”30dp”
android:gravity=”center”
android:text=”页签2″/>
android:id=”@+id/activity_viewpager_tab3_tv”
android:layout_width=”0dp”
android:layout_weight=”1″
android:layout_height=”wrap_content”
android:textSize=”30dp”
android:gravity=”center”
android:text=”页签3″/>
android:id=”@+id/cursor”
android:layout_width=”fill_parent”
android:layout_height=”wrap_content”
android:scaleType=”matrix”
android:src=”@drawable/tab_scoll_bar”
/>
android:id=”@+id/activity_viewpager_vp”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:layout_gravity=”center”
android:layout_weight=”1.0″
android:flipInterval=”30″
android:persistentDrawingCache=”animation”>
2，子页面布局文件
android:layout_width=”match_parent”
android:layout_height=”match_parent”
android:orientation=”vertical”
android:background=”@android:color/holo_red_light”
>
页签对应的布局文件简单地以填满不同颜色来演示效果，一共3个布局文件。
3，activity
package com.sonar.android.push.demo.getui.activities;
import android.app.Activity;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.sonar.android.push.demo.getui.R;
import com.sonar.android.push.demo.getui.adapters.MyPagerAdapter;
import java.util.ArrayList;
import java.util.List;
/**
* 使用PullToRefresh库实现下拉刷新和上拉加载更多
* Created by Administrator on /10/26.
*/
public class ViewPagerActivity extends Activity implements View.OnClickListener{
ViewPager viewPager;
TextView tab1;
TextView tab2;
TextView tab3;
List pageList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_activity_viewpager);
setView();
initView();
setListener();
}
private void setView(){
this.viewPager = (ViewPager)findViewById(R.id.activity_viewpager_vp);
this.tab1 = (TextView)findViewById(R.id.activity_viewpager_tab1_tv);
this.tab2 = (TextView)findViewById(R.id.activity_viewpager_tab2_tv);
this.tab3 = (TextView)findViewById(R.id.activity_viewpager_tab3_tv);
}
private void initView(){
//设置
LayoutInflater layoutInflater = getLayoutInflater();
pageList.add(layoutInflater.inflate(R.layout.layout_viewpager_page1,null));
pageList.add(layoutInflater.inflate(R.layout.layout_viewpager_page2,null));
pageList.add(layoutInflater.inflate(R.layout.layout_viewpager_page3,null));
this.viewPager.setAdapter(new MyPagerAdapter(pageList));
this.viewPager.setCurrentItem(0);
InitImageView();
}
private void setListener() {
this.tab1.setOnClickListener(this);
this.tab2.setOnClickListener(this);
this.tab3.setOnClickListener(this);
this.viewPager.setOnPageChangeListener(new MyOnPageChangeListener());
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.activity_viewpager_tab1_tv:
changePage(0);
break;
case R.id.activity_viewpager_tab2_tv:
changePage(1);
break;
case R.id.activity_viewpager_tab3_tv:
changePage(2);
break;
default:
break;
}
}
private void changePage(int pageNo){
viewPager.setCurrentItem(pageNo);
}
private ImageView cursor;// 动画图片
private int offset = 0;// 动画图片偏移量
private int currIndex = 0;// 当前页卡编号
private int bmpW;// 动画图片宽度
/**
* 初始化动画
*/
private void InitImageView() {
cursor = (ImageView) findViewById(R.id.cursor);
bmpW = BitmapFactory.decodeResource(getResources(), R.drawable.alipay_icon)
.getWidth();// 获取图片宽度
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenW = dm.widthPixels;// 获取分辨率宽度
offset = (screenW / 3 – bmpW) / 2;// 计算偏移量
Matrix matrix = new Matrix();
matrix.postTranslate(offset, 0);
cursor.setImageMatrix(matrix);// 设置动画初始位置
}
/**
* 页卡切换监听
*/
class MyOnPageChangeListener implements ViewPager.OnPageChangeListener {
int one = offset * 2 + bmpW;// 页卡1 ->页卡2
偏移量
int two = one * 2;// 页卡1 ->页卡3
偏移量
@Override
public void onPageSelected(int arg0) {
Animation animation = null;
switch (arg0) {
case 0:
if (currIndex == 1) {
animation = new TranslateAnimation(one, 0, 0, 0);
} else if (currIndex == 2) {
animation = new TranslateAnimation(two, 0, 0, 0);
}
break;
case 1:
if (currIndex == 0) {
animation = new TranslateAnimation(offset, one, 0, 0);
} else if (currIndex == 2) {
animation = new TranslateAnimation(two, one, 0, 0);
}
break;
case 2:
if (currIndex == 0) {
animation = new TranslateAnimation(offset, two, 0, 0);
} else if (currIndex == 1) {
animation = new TranslateAnimation(one, two, 0, 0);
}
break;
}
currIndex = arg0;
animation.setFillAfter(true);// True:图片停在动画结束位置
animation.setDuration(300);
cursor.startAnimation(animation);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
}
}
4，viewPager适配器
package com.sonar.android.push.demo.getui.adapters;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import java.util.List;
/**
* Created by Administrator on /10/26.
*/
public class MyPagerAdapter extends PagerAdapter{
List pageList;
public MyPagerAdapter(List pageList) {
this.pageList = pageList;
}
@Override
public void startUpdate(ViewGroup container) {
}
@Override
public void destroyItem(View container, int position, Object object) {
((ViewPager)container).removeView(pageList.get(position));
}
@Override
public Object instantiateItem(View container, int position) {
((ViewPager) container).addView(pageList.get(position), 0);
return pageList.get(position);
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
@Override
public int getCount() {
return pageList.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
}
5，效果图
