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ScrollView Inside ScrollView

[英]ScrollView Inside ScrollView

我知道谷歌的人已經要求我們不要將Scrollable視圖放在另一個Scrollable視圖中,但他們是否有任何官方聲明指示我們不要這樣做?

試試這個吧

注意:這里parentScrollView表示外部ScrollView,而childScrollView表示childScrollView 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;
    }
});

Atul Bhardwaj上面的回答是正確的方法。 但是如果有人需要將它應用到你對父母的控制較少的ScrollView,我認為這足夠靈活,只是它應該工作的方式:

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();
    }
}

該函數的作用是向myScroll添加一個觸摸偵聽器,當觸摸在子節點中啟動時禁用父觸摸攔截,然后在觸摸實際結束時將其恢復。 您不需要對父ScrollView的引用,它不必是直接父級...它將在顯示列表中移動直到找到它。

在我看來,兩全其美。

這夠近了嗎?

你永遠不應該使用帶有ListView的Horizo​​ntalScrollView,因為ListView負責自己的滾動。 最重要的是,這樣做會使ListView中的所有重要優化都無法處理大型列表,因為它有效地強制ListView顯示其整個項目列表以填充Horizo​​ntalScrollView提供的無限容器。

http://developer.android.com/reference/android/widget/Horizo​​ntalScrollView.html

更新:

由於您可能被迫使用二維滾動視圖,您可以考慮使用此: blog.gorges.us/2010/06/android-two-dimensional-scrollview/的Internet存檔

我沒有用過這個,但這可能是一個合理的方法。

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。

這是一個可能的解決方案。 當到達子ScrollView的末尾時,它將控件傳遞給父ScrollView進行滾動。 它適用於ScrollView中的ScrollView和ListView。

第1步 - 設置父OnTouchListener

parentScroll.setOnTouchListener(new View.OnTouchListener() {
    public boolean onTouch(View v, MotionEvent event) {
        v.getParent().requestDisallowInterceptTouchEvent(false);
        return false;
    }
});

第2步 - 設置子項的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 - 這是正確功能所需的魔術方法

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;
}

我找到了一個很好的解決方案。 請使用此代碼。

    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;
        }
    });

這肯定會奏效。 如果不能正常工作,請嘗試告訴我。

[......]是否有任何官方聲明指示我們不要這樣做?

我想雖然我似乎無法在筆記中找到它。 我知道在嘗試在列表活動中使用滾動視圖時,我發現了這樣的聲明。 我認為Android UI系統處理嵌套滾動條的方式實際上存在一個邏輯焦點“bug”,可能應該更好地檢測並傳達給開發人員。 但我的建議是......

最后,為了用戶的利益,最好考慮單個可滾動視圖。 這就像在HTML頁面上的滾動條內有滾動條; 它可能是合法的,但卻是一種糟糕的用戶體驗。

實際上,有一個關於它的官方聲明,在一個名為“ ListView世界相當古老的視頻中。 他們說不要將任何可滾動視圖放在另一個視圖中(當兩者都在同一方向時)。

但是,現在我們有了一個新視圖,允許兩個視圖同時滾動,可能顯示一個很酷的效果:

https://developer.android.com/reference/android/support/v4/widget/NestedScrollView.html

我沒有找到任何這方面的例子,所以我寫的只是猜測它的作用和它的用途。

Android支持v4庫有一個名為NestedScrollView的類。

嘗試嵌套滾動視圖: http//ivankocijan.xyz/android-nestedscrollview/

您可以將ScrollView放在另一個ScrollView中。 只需擴展子ScrollView以覆蓋onTouchEvent方法。 像這樣

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);
    }
}

在這里,我在ScrollView中創建了一個與ScrollView相關的示例項目。 一種觀點是可滾動的兩種方式。 看看這個 :-

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(用於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"
/>

如果有人正在尋找答案,我的實現略有不同。 我擴展了ScrollView類並在子節點中實現了onTouchListener,並在構造函數中將其設置為self。

在onTouch回調中,如果運動事件對象帶有指針計數值為2,則返回true,否則返回false。 這樣,如果兩個手指在屏幕上移動,它會將其視為縮放的縮放,否則會將其視為正常滾動。 我沒有要求父母觸摸禁用等。

@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
    if(motionEvent.getPointerCount() == 2){
        mCallbacks.onPinchZoomAction(motionEvent);
        return true;
    }
    return false;
}

不僅谷歌說它的不良做法,它只是沒有多大意義。 假設您有兩個嵌套在另一個內部的垂直可滾動視圖。 當您將手指移動到滾動視圖上時,您要移動哪一個,內部還是外部?

你應該重新考慮你的UI設計不需要這個,有很多方法可以創建一個很棒的用戶界面,並且仍然保持簡單。

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