在Fragment中加一个嵌套了ListView的ScrollView（一）

首先介绍一下这个程序的功能：

1.顶部有两个可以切换Fragment的Button

2.在其中一个Fragment中里有个ScrollView，ScrollView中有ViewFlipper，ListView。（另一个Fragment中就随意了）

　随着listView的滚动，ViewFlipper中的内容也会滚动。

3.两个布局（主布局，一个Fragment的布局（另一个没写，其实都一样）），一个Fragment，一个主Activity，重写ListView（不重写的话，不会随着ViewFlipper滚动而滚动），至于为啥重写，咱们后面再细说哈（尴尬脸）。

布局---activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!--用于切换的Buuton-->
    <LinearLayout
        android:id="@+id/btn_linear"
        android:layout_width="match_parent"
        android:layout_height="55dp"
        android:background="#222222"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn1"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:background="#00000000"
            android:text="按钮1"
            android:textColor="#ffffff"
            android:textSize="18sp" />

        <Button
            android:id="@+id/btn2"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:background="#00000000"
            android:text="按钮2"
            android:textColor="#ffffff"
            android:textSize="18sp" />

    </LinearLayout>

    <!--内容部分，fragment的切换-->
    <LinearLayout
        android:id="@+id/content_fragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/btn_linear"
        android:orientation="vertical">
    </LinearLayout>

</RelativeLayout>

布局---but1_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <!-- android:fillViewport="true"可以显示多个Item-->
    <ScrollView
        android:id="@+id/scrollview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <!--里面的图片资源自己加哦-->
            <ViewFlipper
                android:id="@+id/viewflipper"
                android:layout_width="match_parent"
                android:layout_height="150dp"
                android:flipInterval="2000">

                <ImageView
                    android:id="@+id/img1"
                    android:layout_width="match_parent"
                    android:layout_height="150dp"
                    android:scaleType="fitXY"
                    android:src="@drawable/viewflipper_1" />

                <ImageView
                    android:id="@+id/img2"
                    android:layout_width="match_parent"
                    android:layout_height="150dp"
                    android:scaleType="fitXY"
                    android:src="@drawable/viewflipper_2" />

                <ImageView
                    android:id="@+id/img3"
                    android:layout_width="match_parent"
                    android:layout_height="150dp"
                    android:scaleType="fitXY"
                    android:src="@drawable/viewflipper_3" />
            </ViewFlipper>

            <!--my为App的名字-->
            <com.example.liang.my.NestedListView
                android:id="@+id/listview_1"
                android:layout_width="match_parent"
                android:layout_height="match_parent"/>
        </LinearLayout>
    </ScrollView>
</LinearLayout>

另一个布局里面啥也没写

主Activity---MainActivity

package com.example.liang.my;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.widget.Button;

public class MainActivity extends FragmentActivity implements View.OnClickListener{

    //按钮
    private Button btn1,btn2;
    //用于切换的fragment和记录当前的Fragment
    private Fragment btn1Fragment,btn2Fragment,currentFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initUI();
        initTab();
    }

    /**
     * 初始化UI
     */
    private void initUI(){
        btn1=(Button)findViewById(R.id.btn1);
        btn2=(Button)findViewById(R.id.btn2);

        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);

    }

    /**
     * 初始化顶部标签
     */
    private void initTab(){
        //如果碎片没有创建则先创建
        if(btn1Fragment==null){
            btn1Fragment=new Btn1iFragment();
        }
        getSupportFragmentManager().beginTransaction()
                .add(R.id.content_fragment,btn1Fragment).commit();

        //记录当前的Fragment
        currentFragment=btn1Fragment;
    }

    @Override
    public void onClick(View view) {
        switch(view.getId()){
            case R.id.btn1:
                clickTab1();
                break;
            case R.id.btn2:
                clickTab2();
                break;
        }
    }

    public void clickTab1(){
        if(btn1Fragment==null){
            btn1Fragment=new Btn1Fragment();
        }
        addOrShowFragment(getSupportFragmentManager().beginTransaction(),btn1Fragment);
    }
    public void clickTab2(){

        if(btn2Fragment==null){
            btn2Fragment=new Btn2Fragment();
        }
        addOrShowFragment(getSupportFragmentManager().beginTransaction(),btn2Fragment);
    }
    /**
     * 添加或显示碎片
     * @param transaction
     * @param fragment
     */
    private void addOrShowFragment(FragmentTransaction transaction, Fragment fragment) {

        if (currentFragment == fragment)
            return;
        // 如果当前fragment未被添加，则添加到Fragment管理器中
        if (!fragment.isAdded()) {
            transaction.hide(currentFragment)
                    .add(R.id.content_fragment, fragment).commit();
        } else {
            transaction.hide(currentFragment).show(fragment).commit();
        }

        currentFragment = fragment;
    }
}

Fragment---Bt1Fragment

package com.example.liang.my.fragment;

import android.os.Bundle;

import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ScrollView;
import android.widget.ViewFlipper;

import com.example.liang.my.R;
import com.example.liang.my.listview.NestedListView;

/**
 * Created by liang on 2016/8/18.
 */
public class Bt1Fragment extends Fragment implements AdapterView.OnItemClickListener {

    private NestedListView mListView;
    private ScrollView mScrollView;
    private ViewFlipper flipper;

    private ArrayAdapter<String> mAdapter;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.bt1_layout,container,false);
        mScrollView = (ScrollView) view.findViewById(R.id.scrollview);
        mListView = (NestedListView) view.findViewById(R.id.listview_1);
        flipper=(ViewFlipper)view.findViewById(R.id.viewflipper);
        //启动图片切换
        flipper.startFlipping();

        //数据部分
        String[] array = new String[] { "刘一 ", "陈二", "张三", "李四", "王五", "赵六",
                "孙七", "周八", "吴九", "郑十","刘一 ", "陈二", "张三", "李四", "王五", "赵六",
                "孙七", "周八", "吴九", "郑十" };
        mAdapter = new ArrayAdapter<>(getActivity(),
                android.R.layout.simple_list_item_1, array);

        mListView.setAdapter(mAdapter);

        //解决未滑动时聚焦listview的问题
        mListView.setFocusable(false);

        return view;
    }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

    }
}

Fragment---Btn1Fragment(啥也没写)

package com.example.liang.my.fragment;

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;
import android.widget.AdapterView;

/**
 * Created by liang on 2016/8/18.
 */
public class Btn2Fragment extends Fragment implements AdapterView.OnItemClickListener {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        return super.onCreateView(inflater, container, savedInstanceState);
    }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

    }
}

重写的ListView---NestedListView

package com.example.liang.my.listview;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListAdapter;
import android.widget.ListView;

public class NestedListView extends ListView implements OnTouchListener,
        OnScrollListener {

    private int listViewTouchAction;
    private static final int MAXIMUM_LIST_ITEMS_VIEWABLE = 99;

    public NestedListView(Context context, AttributeSet attrs) {
        super(context, attrs);
        listViewTouchAction = -1;
        setOnScrollListener(this);
        setOnTouchListener(this);
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
            int visibleItemCount, int totalItemCount) {
        if (getAdapter() != null
                && getAdapter().getCount() > MAXIMUM_LIST_ITEMS_VIEWABLE) {
            if (listViewTouchAction == MotionEvent.ACTION_MOVE) {
                scrollBy(0, -1);
            }
        }
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        int newHeight = 0;
        final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
        if (heightMode != MeasureSpec.EXACTLY) {
            ListAdapter listAdapter = getAdapter();
            if (listAdapter != null && !listAdapter.isEmpty()) {
                int listPosition = 0;
                for (listPosition = 0; listPosition < listAdapter.getCount()
                        && listPosition < MAXIMUM_LIST_ITEMS_VIEWABLE; listPosition++) {
                    View listItem = listAdapter.getView(listPosition, null,
                            this);
                    // now it will not throw a NPE if listItem is a ViewGroup
                    // instance
                    if (listItem instanceof ViewGroup) {
                        listItem.setLayoutParams(new LayoutParams(
                                LayoutParams.WRAP_CONTENT,
                                LayoutParams.WRAP_CONTENT));
                    }
                    listItem.measure(widthMeasureSpec, heightMeasureSpec);
                    newHeight += listItem.getMeasuredHeight();
                }
                newHeight += getDividerHeight() * listPosition;
            }
            if ((heightMode == MeasureSpec.AT_MOST) && (newHeight > heightSize)) {
                if (newHeight > heightSize) {
                    newHeight = heightSize;
                }
            }
        } else {
            newHeight = getMeasuredHeight();
        }
        setMeasuredDimension(getMeasuredWidth(), newHeight);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (getAdapter() != null
                && getAdapter().getCount() > MAXIMUM_LIST_ITEMS_VIEWABLE) {
            if (listViewTouchAction == MotionEvent.ACTION_MOVE) {
                scrollBy(0, 1);
            }
        }
        return false;
    }
}