Android -下拉重新整理，ViewPager和ScrollView巢狀滾動問題解決方案

》ViewPager和ScrollView巢狀滾動問題解決方案，即View衝突，重繪衝突的那部分的View的大小，寬度和高度，根據具體情況而定。

View檢視和圖層。。

下面的情況是重繪了ViewPager的高度：resetViewPagerHeight(int position)

-------------Java程式碼如下：

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
public class Solution3Activity extends FragmentActivity {
private ViewPager viewPager;
private ViewPagerFragmentAdapter adapter;
private MyListener listener = new MyListener();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_solution3);

viewPager = (ViewPager) findViewById(R.id.viewPager);
adapter = new ViewPagerFragmentAdapter(getSupportFragmentManager());
adapter.addFragment(new Content1Fragment());
adapter.addFragment(new Content2Fragment());
adapter.addFragment(new Content3Fragment());
viewPager.setOffscreenPageLimit(3);
viewPager.setOnPageChangeListener(listener);
viewPager.setAdapter(adapter);

// 模擬網路請求完成之後重置ViewPager高度
new myAsyncTask().execute();
}
/**
* 重新設定viewPager高度
* 
* @param position
*/
public void resetViewPagerHeight(int position) {
View child = viewPager.getChildAt(position);
if (child != null) {
child.measure(0, 0);
int h = child.getMeasuredHeight();
LinearLayout.LayoutParams params = (LayoutParams) viewPager
.getLayoutParams();
params.height = h + 50;
viewPager.setLayoutParams(params);
}
}
public class MyListener implements OnPageChangeListener {

@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
// 頁面切換後重置ViewPager高度
resetViewPagerHeight(position);
switch (position) {
case 0:
break;
case 1:
break;
case 2:
break;
}
}
}
public class myAsyncTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
resetViewPagerHeight(0);
}
}
}

---- XML佈局檔案

<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" >


    <com.hellsam.scrollviewwithviewpager.CustomScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >


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


            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="350dp"
                android:background="#0000FF" >


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerInParent="true"
                    android:text="很大一塊內容 H:350dp"
                    android:textColor="#FFFFFF" />
            </RelativeLayout>


            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="30dp"
                android:orientation="horizontal" >


                <TextView
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:gravity="center"
                    android:text="內容1 H:300dp" />


                <TextView
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:gravity="center"
                    android:text="內容2 H:500dp" />


                <TextView
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:gravity="center"
                    android:text="內容3 H:800dp" />
            </LinearLayout>


            <android.support.v4.view.ViewPager
                android:id="@+id/viewPager"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
        </LinearLayout>
    </com.hellsam.scrollviewwithviewpager.CustomScrollView>


</LinearLayout>