我知道谷歌的人已经要求我们不要将Scrollable视图放在另一个Scrollable视图中，但他们是否有任何官方声明指示我们不要这样做？
答案 0 :(得分：62)
试试这个
注意：此处parentScrollView表示外部ScrollView而childScrollView表示Innner ScrollView
parentScrollView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.v(TAG, "PARENT TOUCH");
findViewById(R.id.child_scroll).getParent()
.requestDisallowInterceptTouchEvent(false);
return false;
}
});
childScrollView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.v(TAG, "CHILD TOUCH");
// Disallow the touch request for parent scroll on touch of child view
v.getParent().requestDisallowInterceptTouchEvent(true);
return false;
}
});
答案 1 :(得分：16)
这足够接近吗？
你永远不应该使用 带有ListView的HorizontalScrollView， 因为ListView负责自己的 滚动。最重要的是，做 这打败了所有重要的 在ListView中进行优化以进行处理 有大型列表，因为它有效 强制ListView显示它 整个项目清单填写完整 无限容器供应 HorizontalScrollView。
http://developer.android.com/reference/android/widget/HorizontalScrollView.html
更新：
由于您可能被迫使用二维滚动视图，因此您可以考虑使用： Internet archive of blog.gorges.us/2010/06/android-two-dimensional-scrollview/
我没有用过它，但这可能是一种合理的方法。
答案 2 :(得分：16)
Atul Bhardwaj's answer above是正确的方法。但是如果有人需要将它应用到你对父母的控制较少的ScrollView，我认为这足够灵活，只是它应该的方式：
private void makeMyScrollSmart() {
myScroll.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View __v, MotionEvent __event) {
if (__event.getAction() == MotionEvent.ACTION_DOWN) {
// Disallow the touch request for parent scroll on touch of child view
requestDisallowParentInterceptTouchEvent(__v, true);
} else if (__event.getAction() == MotionEvent.ACTION_UP || __event.getAction() == MotionEvent.ACTION_CANCEL) {
// Re-allows parent events
requestDisallowParentInterceptTouchEvent(__v, false);
}
return false;
}
});
}
private void requestDisallowParentInterceptTouchEvent(View __v, Boolean __disallowIntercept) {
while (__v.getParent() != null && __v.getParent() instanceof View) {
if (__v.getParent() instanceof ScrollView) {
__v.getParent().requestDisallowInterceptTouchEvent(__disallowIntercept);
}
__v = (View) __v.getParent();
}
}
该功能的作用是向myScroll添加一个触摸监听器，当孩子触摸开始时禁用父母的触摸拦截，然后在触摸实际结束时将其恢复。您不需要对父ScrollView的引用，也不必是直接的父级...它将在显示列表中移动直到找到它。
在我看来，这两个世界中最好的。
答案 3 :(得分：7)
childScrollView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
// Disallow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_UP:
// Allow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
return false;
}
});
v.getParent（）=父scrollView。
答案 4 :(得分：3)
这是一个可能的解决方案。当到达子ScrollView的末尾时，它将控件传递给父ScrollView进行滚动。它适用于ScrollView中的ScrollView和ListView。
第1步 - 设置父OnTouchListener
parentScroll.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
v.getParent().requestDisallowInterceptTouchEvent(false);
return false;
}
});
第2步 - 设置子项的OnTouchListener（ScrollView或ListView）
aChildScrollView.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
v.getParent().requestDisallowInterceptTouchEvent(shouldRequestDisallowIntercept((ViewGroup) v, event));
return false;
}
});
aListView.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
v.getParent().requestDisallowInterceptTouchEvent(shouldRequestDisallowIntercept((ViewGroup) v, event));
return false;
}
});
第3步 - 这是正确功能所需的魔术方法
protected boolean shouldRequestDisallowIntercept(ViewGroup scrollView, MotionEvent event) {
boolean disallowIntercept = true;
float yOffset = getYOffset(event);
if (scrollView instanceof ListView) {
ListView listView = (ListView) scrollView;
if (yOffset < 0 && listView.getFirstVisiblePosition() == 0 && listView.getChildAt(0).getTop() >= 0) {
disallowIntercept = false;
}
else if (yOffset > 0 && listView.getLastVisiblePosition() == listView.getAdapter().getCount() - 1 && listView.getChildAt(listView.getChildCount() - 1).getBottom() <= listView.getHeight()) {
disallowIntercept = false;
}
}
else {
float scrollY = scrollView.getScrollY();
disallowIntercept = !((scrollY == 0 && yOffset < 0) || (scrollView.getHeight() + scrollY == scrollView.getChildAt(0).getHeight() && yOffset >= 0));
}
return disallowIntercept;
}
protected float getYOffset(MotionEvent ev) {
final int historySize = ev.getHistorySize();
final int pointerCount = ev.getPointerCount();
if (historySize > 0 && pointerCount > 0) {
float lastYOffset = ev.getHistoricalY(pointerCount - 1, historySize - 1);
float currentYOffset = ev.getY(pointerCount - 1);
float dY = lastYOffset - currentYOffset;
return dY;
}
return 0;
}
答案 5 :(得分：2)
[...]是否有任何官方声明指示我们不要这样做？
我认为虽然我似乎无法在笔记中找到它。我知道在尝试在列表活动中使用滚动视图时，我发现了这样的声明。我认为Android UI系统处理嵌套滚动条的方式实际上存在一个逻辑焦点“bug”，可能应该更好地检测并传达给开发人员。但我的建议是......
最后，为了用户的利益，最好考虑单个可滚动视图。这就像在HTML页面上的滚动条内有滚动条;它可能是合法的，但却是一种糟糕的用户体验。
答案 6 :(得分：2)
我找到了一个非常好的解决方案。请使用此代码。
parentScrollView.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
Utils.showLog("PARENT TOUCH");
findViewById(R.id.activity_mesh_child_scrollView).getParent().requestDisallowInterceptTouchEvent(false);
return false;
}
});
childScrollView.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
Utils.showLog("CHILD TOUCH");
// Disallow the touch request for parent scroll on touch of child view
v.getParent().requestDisallowInterceptTouchEvent(true);
return false;
}
});
这肯定有用。如果不能正常工作，请试着让我知道。
答案 7 :(得分：1)
实际上，关于它的官方声明，在一个名为“the world of ListView”的相当古老的视频中。他们说不要将任何可滚动视图放在另一个视图中（当两者都在同一方向时）。
但是，现在我们有了一个新视图，允许两个视图同时滚动，可能显示出很酷的效果：
https://developer.android.com/reference/android/support/v4/widget/NestedScrollView.html
我没有找到任何这方面的例子，所以我写的只是猜测它的作用以及它的用途。
答案 8 :(得分：1)
Android支持v4库有一个名为NestedScrollView的类。
答案 9 :(得分：0)
您可以将ScrollView放在另一个ScrollView中。只需扩展子ScrollView以覆盖onTouchEvent方法。像这样
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
public class ChildScrollView extends android.widget.ScrollView {
private int parent_id;
public ChildScrollView(Context context) {
super(context);
}
public ChildScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ChildScrollView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public boolean onTouchEvent(MotionEvent event){
requestDisallowInterceptTouchEvent(true);
return super.onTouchEvent(event);
}
}
答案 10 :(得分：0)
在这里，我在ScrollView中创建了一个与ScrollView相关的示例项目。一种观点是可滚动的两种方式。检查出来： -
MainActivity.java -
package com.example.dev_task_193_scrollview;
import com.example.dev_task_196_scrollview.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.Toast;
public class MainActivity extends Activity implements View.OnClickListener{
ImageView imageView1,imageView2,imageView3,IVimage1,IVimage2,IVimage3,IVimage4,IVimage5,IVimage6;
ListView listView1,listView2;
HorizontalScrollView horizontalScrollView1,horizontalScrollView2;
ScrollView parentScrollView, scrollView1;
RelativeLayout relativeLayout1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String[] values = new String[] { "Android", "iPhone", "WindowsMobile",
"Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
"Linux", "OS/2", "Ubuntu", "Windows7", "Max OS X", "Linux",
"OS/2", "Ubuntu", "Windows7", "Max OS X", "Linux", "OS/2",
"Android", "iPhone", "WindowsMobileWindowsMobileWindowsMobileWindowsMobile" };
relativeLayout1 = (RelativeLayout) findViewById(R.id.relativeLayout1);
imageView1 = (ImageView) findViewById(R.id.imageView1);
imageView1.setBackgroundResource(R.drawable.info);
imageView2 = (ImageView) findViewById(R.id.imageView2);
imageView2.setBackgroundResource(R.drawable.info);
imageView3 = (ImageView) findViewById(R.id.imageView3);
imageView3.setBackgroundResource(R.drawable.info);
listView1 = (ListView) findViewById(R.id.listView1);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.list_item, values);
listView1.setAdapter(adapter);
listView2 = (ListView) findViewById(R.id.listView2);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,
R.layout.list_item, values);
listView2.setAdapter(adapter1);
parentScrollView = (ScrollView) findViewById(R.id.parentScrollView);
scrollView1 = (ScrollView) findViewById(R.id.scrollView1);
horizontalScrollView1 = (HorizontalScrollView) findViewById(R.id.horizontalScrollView1);
horizontalScrollView2 = (HorizontalScrollView) findViewById(R.id.horizontalScrollView2);
IVimage1 = (ImageView) findViewById(R.id.IVimage1);
IVimage2 = (ImageView) findViewById(R.id.IVimage2);
IVimage3 = (ImageView) findViewById(R.id.IVimage3);
IVimage4 = (ImageView) findViewById(R.id.IVimage4);
IVimage5 = (ImageView) findViewById(R.id.IVimage5);
IVimage6 = (ImageView) findViewById(R.id.IVimage6);
scrollView1.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
return false;
}
});
horizontalScrollView1.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
return false;
}
});
listView1.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
return false;
}
});
listView1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(), "Clicked "+parent.getItemAtPosition(position).toString(), Toast.LENGTH_SHORT).show();
}
});
listView2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getApplicationContext(), "Clicked "+parent.getItemAtPosition(position).toString(), Toast.LENGTH_SHORT).show();
}
});
listView2.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
return false;
}
});
horizontalScrollView2.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
return false;
}
});
/*imageView1.setOnClickListener(this);
imageView2.setOnClickListener(this);
imageView3.setOnClickListener(this);*/
IVimage1.setOnClickListener(this);
IVimage2.setOnClickListener(this);
IVimage3.setOnClickListener(this);
IVimage4.setOnClickListener(this);
IVimage5.setOnClickListener(this);
IVimage6.setOnClickListener(this);
imageView1.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
return false;
}
});
imageView2.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
return false;
}
});
imageView3.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event)
{
// Disallow the touch request for parent scroll on touch of child view
parentScrollView.requestDisallowInterceptTouchEvent(true);
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
return false;
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.imageView1:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.imageView2:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.imageView3:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.IVimage1:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.IVimage2:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.IVimage3:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.IVimage4:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.IVimage5:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
case R.id.IVimage6:
Toast.makeText(getApplicationContext(), "Clicked "+v.getTag(), Toast.LENGTH_SHORT).show();
break;
}
// TODO Auto-generated method stub
}
}
activity_main.xml -
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/parentScrollView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
android:background="@drawable/login_bg" >
<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="300dp" >
<HorizontalScrollView
android:id="@+id/horizontalScrollView1"
android:layout_width="match_parent"
android:layout_height="300dp"
android:fillViewport="false" >
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="@drawable/bg" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="300dp"
android:layout_height="400dp"
android:tag="imageView1" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="300dp"
android:layout_height="400dp"
android:layout_toRightOf="@+id/imageView1"
android:tag="imageView2" />
<ImageView
android:id="@+id/imageView3"
android:layout_width="300dp"
android:layout_height="400dp"
android:layout_toRightOf="@+id/imageView2"
android:tag="imageView3" />
</RelativeLayout>
</HorizontalScrollView>
</ScrollView>
<ListView
android:id="@+id/listView1"
android:layout_width="500dp"
android:layout_height="400dp"
android:layout_below="@+id/scrollView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:background="@drawable/ic_launcherwrweq" >
</ListView>
<HorizontalScrollView
android:id="@+id/horizontalScrollView2"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_below="@+id/listView1"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:background="@drawable/claim_detail_header_bg"
android:fillViewport="true" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="@+id/IVimage1"
android:layout_width="125dp"
android:layout_height="125dp"
android:padding="15dp"
android:src="@drawable/a"
android:tag="a" >
</ImageView>
<ImageView
android:id="@+id/IVimage2"
android:layout_width="125dp"
android:layout_height="125dp"
android:padding="15dp"
android:src="@drawable/b"
android:tag="b" >
</ImageView>
<ImageView
android:id="@+id/IVimage3"
android:layout_width="125dp"
android:layout_height="125dp"
android:padding="15dp"
android:src="@drawable/c"
android:tag="c" >
</ImageView>
<ImageView
android:id="@+id/IVimage4"
android:layout_width="125dp"
android:layout_height="125dp"
android:padding="15dp"
android:src="@drawable/g"
android:tag="g" >
</ImageView>
<ImageView
android:id="@+id/IVimage5"
android:layout_width="125dp"
android:layout_height="125dp"
android:padding="15dp"
android:src="@drawable/e"
android:tag="e" >
</ImageView>
<ImageView
android:id="@+id/IVimage6"
android:layout_width="125dp"
android:layout_height="125dp"
android:padding="15dp"
android:src="@drawable/f"
android:tag="f" >
</ImageView>
</LinearLayout>
</HorizontalScrollView>
<ListView
android:id="@+id/listView2"
android:layout_width="500dp"
android:layout_height="400dp"
android:layout_below="@+id/horizontalScrollView2"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:background="@drawable/ic_launcherwrweq" >
</ListView>
</RelativeLayout>
</ScrollView>
list_item.xml（适用于ListView） -
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:textSize="25sp"
android:maxLines="1"
android:singleLine="true"
/>
答案 11 :(得分：0)
如果有人在寻找答案，我的实施方式略有不同。我扩展了ScrollView类并在子节点中实现了onTouchListener，并在构造函数中将其设置为self。
在onTouch回调中，如果motion事件对象的指针值为2，则返回true，否则返回false。这样，如果两个手指在屏幕上移动，它会将其视为缩放的缩放，否则会将其视为正常滚动。我没有要求父母禁用等等。
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if(motionEvent.getPointerCount() == 2){
mCallbacks.onPinchZoomAction(motionEvent);
return true;
}
return false;
}
答案 12 :(得分：-2)
不仅谷歌说它的不良做法，它只是没有多大意义。假设您有两个嵌套在另一个内部的垂直可滚动视图。当您将手指移动到滚动视图上时，您要移动哪一个，内部还是外部？
你应该重新考虑你的用户界面设计不需要这个，有很多方法可以创建一个很好的用户界面，并且仍然保持简单。