ViewPager嵌套ViewPager,的事件分发机制!

//外层ViewPager的xml，不用做处理。在里层的自定义viewpager,onTouchEvent中判断是否拦截，如果点到自定义viewpager上面，就不要拦截，如果没有点到自定义viewpager就请求拦截掉改事件。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="bawei.ontouchevent.MainActivity">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/vp_out"
></android.support.v4.view.ViewPager>
</LinearLayout>

//fragment 的xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<view.InViewPager
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="@+id/vp_in"
></view.InViewPager>
<ListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="wrap_content"></ListView>
</LinearLayout>
//如果点击或者触摸到(down或者move)自定义viewpager,告诉父类不要拦截，在子类的onTouchEvent方法中消费掉该事件。如果没有点击到，告诉父类拦截掉（cancle或者up），在父类中消费掉该事件
package view;

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;

/**
* 1.类的用途
* 2.@author:Sunyubo
* 3.@ 2016/11/28.
*/
public class InViewPager extends ViewPager{
public InViewPager(Context context) {
super(context);
}

public InViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
if(this.getChildCount()<=1){
return super.onTouchEvent(ev);
}
switch (ev.getAction()){
case MotionEvent.ACTION_DOWN:
//告诉父类不要拦截
getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_MOVE:
getParent().requestDisallowInterceptTouchEvent(true);
break;
//告诉父类拦截
case MotionEvent.ACTION_UP:
getParent().requestDisallowInterceptTouchEvent(false);
break;
case MotionEvent.ACTION_CANCEL:
getParent().requestDisallowInterceptTouchEvent(false);
break;
}
//执行父类原来的逻辑
super.onTouchEvent(ev);
return true;
}
}
//其他的都和原来的一样
fragment1中的代码
package fragment;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;

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

import bawei.ontouchevent.R;

/**
* 1.类的用途
* 2.@author:Sunyubo
* 3.@ 2016/11/28.
*/
public class Fragment1 extends android.support.v4.app.Fragment{

private View view;
private ViewPager vp;
private ListView lv;
List<Integer> list=new ArrayList<>();
List<String> list1=new ArrayList<>();
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

//   view = inflater.inflate(R.layout.f1,null);
view=View.inflate(getActivity(),R.layout.f1,null);
vp =(ViewPager)view.findViewById(R.id.vp_in);
lv =(ListView)view.findViewById(R.id.lv);
return view;
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
initdata();
lv.setAdapter(new ArrayAdapter(getActivity(),android.R.layout.simple_list_item_1,list1));
vp.setAdapter(new PagerAdapter() {
@Override
public int getCount() {
return list.size();
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view==object;
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView i=new ImageView(getActivity());
i.setImageResource(list.get(position));
container.addView(i);
return i;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
//  super.destroyItem(container, position, object);
container.removeView((View) object);
}
});
}

private void initdata() {
list.clear();
list.add(R.drawable.a1);
list.add(R.drawable.a2);
list.add(R.drawable.a3);
list.add(R.drawable.a4);
for(int i=0;i<20;i++){
list1.add("这是第"+i+"条数据");

}

}
}
//fragment2和fragment3代码一样
package fragment;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
* 1.类的用途
* 2.@author:Sunyubo
* 3.@ 2016/11/28.
*/
public class Fragment2 extends android.support.v4.app.Fragment{
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
TextView tv=new TextView(getActivity());
tv.setText("Fragment2");
return tv;
}
}

//mainActivity
package bawei.ontouchevent;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;

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

import fragment.Fragment1;
import fragment.Fragment2;
import fragment.Fragment3;

public class MainActivity extends AppCompatActivity {

private ViewPager vp;
List<Fragment> list=new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
vp =(ViewPager)findViewById(R.id.vp_out);
initFragment();
vp.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
@Override
public Fragment getItem(int position) {
return  list.get(position);
}

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

});
}

private void initFragment() {
Fragment  fragment1=new Fragment1();
Fragment  fragment2=new Fragment2();
Fragment  fragment3=new Fragment3();
list.add(fragment1);
list.add(fragment2);
list.add(fragment3);

}
}