Android基于ViewPager实现类似微信页面切换效果

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package com.rui.viewpagerdemo; 
 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
 
/** 
 * Created by qqazl001 on 2018/3/26. 
 */ 
 
public class MyFragment1 extends Fragment{ 
 @Nullable 
 @Override 
 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
  //布局文件转成View 
  //参数1：Fragment需要加载的布局文件 
  //参数2：加载layout的父ViewGroup 
  //参数1：是否返回父ViewGroup对象，false为不 
  View view = inflater.inflate(R.layout.view1,container,false); 
  return view; 
 } 
} 

package com.rui.viewpagerdemo; 
 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
 
/** 
 * Created by qqazl001 on 2018/3/26. 
 */ 
 
public class MyFragment2 extends Fragment{ 
 @Nullable 
 @Override 
 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
  //布局文件转成View 
  //参数1：Fragment需要加载的布局文件 
  //参数2：加载layout的父ViewGroup 
  //参数1：是否返回父ViewGroup对象，false为不 
  View view = inflater.inflate(R.layout.view2,container,false); 
  return view; 
 } 
} 

package com.rui.viewpagerdemo; 
 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
 
/** 
 * Created by qqazl001 on 2018/3/26. 
 */ 
 
public class MyFragment3 extends Fragment{ 
 @Nullable 
 @Override 
 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
  //布局文件转成View 
  //参数1：Fragment需要加载的布局文件 
  //参数2：加载layout的父ViewGroup 
  //参数1：是否返回父ViewGroup对象，false为不 
  View view = inflater.inflate(R.layout.view3,container,false); 
  return view; 
 } 
} 

package com.rui.viewpagerdemo; 
 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.PagerAdapter; 
import android.view.View; 
import android.view.ViewGroup; 
 
import java.util.ArrayList; 
import java.util.List; 
 
/** 
 * Created by qqazl001 on 2018/3/26. 
 */ 
 
public class MyAdapter extends FragmentPagerAdapter{ 
 List listFragment; 
 List listTab = new ArrayList(); 
 
 public MyAdapter(FragmentManager fm,List listFragment,ListlistTab) { 
  super(fm); 
  this.listFragment=listFragment; 
  this.listTab=listTab; 
 } 
 
 
 @Override 
 public CharSequence getPageTitle(int position) { 
  //返回标题名称 
  return listTab.get(position); 
 } 
 
 @Override 
 public Fragment getItem(int position) { 
  //返回页面内容 
  return listFragment.get(position); 
 } 
 
 @Override 
 public int getCount() { 
  //一共多少个页面 
  return listFragment.size(); 
 } 
} 

package com.rui.viewpagerdemo; 
 
import android.annotation.SuppressLint; 
import android.graphics.Color; 
import android.support.v4.app.Fragment; 
import android.support.v4.view.PagerTabStrip; 
import android.support.v4.view.ViewPager; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Toast; 
 
import java.util.ArrayList; 
import java.util.List; 
//调用接口监听，并实现方法 
public class MainActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener{ 
 private List listFragment;//声明List，存放Fagment 
 private ViewPager viewPager;//声明ViewPager 
 private PagerTabStrip pagerTabStrip;//声明PagerTabStrip 
 private List listTab;//声明List,存放标题 
 
 @SuppressLint("ResourceType") 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  //实例化List 
  listFragment = new ArrayList(); 
  //view加入list 
  listFragment.add(new MyFragment1()); 
  listFragment.add(new MyFragment2()); 
  listFragment.add(new MyFragment3()); 
  //标题加入list 
  listTab = new ArrayList(); 
  listTab.add("第一页"); 
  listTab.add("第二页"); 
  listTab.add("第三页"); 
 
  //为PagerTabStrip设置属性 
  pagerTabStrip = (PagerTabStrip)findViewById(R.id.pagerTabStrip); 
  //pagerTabStrip.setBackgroundColor(color.white); 设置背景色 
  pagerTabStrip.setTextColor(Color.RED); //设置标题文字颜色 
  pagerTabStrip.setDrawFullUnderline(false);//是否显示一条横线 
  pagerTabStrip.setTabIndicatorColor(Color.GREEN);//标题下的短粗线颜色 
 
  //实例化适配器 
  MyAdapter myAdapter = new MyAdapter(getSupportFragmentManager(),listFragment,listTab); 
  //实例化ViewPager 
  viewPager = (ViewPager) findViewById(R.id.view1); 
  //为viewPager加载适配器 
  viewPager.setAdapter(myAdapter); 
  //加载监听事件 
  viewPager.addOnPageChangeListener(this); 
 } 
 
 
 @Override 
 public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 
  // position-点击滑动的界面的位置 
 
  // positionOffset-点击页面占整个屏幕的百分比 
 
  // positionOffsetPixels-屏幕像素的位置 
 } 
 
 @Override 
 public void onPageSelected(int position) { 
  //滑动到第几页 
  Toast.makeText(MainActivity.this,"第"+(position+1)+"页",Toast.LENGTH_SHORT).show(); 
 } 
 
 @Override 
 public void onPageScrollStateChanged(int state) { 
  //state:滑动状态 
 
  //当页面停止的时候该参数为0，页面开始滑动的时候变成了1， 
 
  //当手指从屏幕上抬起变为了2（无论页面是否从1跳到了2），当页面静止后又变成了0 
 
  //只在0，1，2三个数字之间切换. 
 } 
}