Android 6中的滚动条触控区域

Question

我观察到Android 6.0 Marshmallow中的新行为.滚动条的触摸区域比滚动条更干净.它在以下屏幕截图中可见.滚动条有20 dp(绿色区域),触摸区域可能是48 dp(蓝色和绿色区域).我想只在滚动条上方设置触摸区域:

我使用以下:

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style name="MyTheme.Dark" parent="android:Theme.Black">
        <item name="android:fastScrollStyle">@style/Widget.FastScroll</item>
        <item name="android:scrollbarThumbVertical">@drawable/dark_scrollbar_thumb</item>
        <item name="android:scrollbarTrackVertical">@drawable/dark_scrollbar_track</item>
        <item name="android:scrollbarSize">4dp</item>
        <item name="android:fastScrollThumbDrawable">@drawable/dark_scrollbar_fast_thumb</item>
        <item name="android:fastScrollTrackDrawable">@drawable/dark_scrollbar_fast_track</item>
    </style>

    <style name="Widget.FastScroll" parent="android:Widget.Material.FastScroll">
    </style>

</resources>

dark_scrollbar_fast_thumb.xml:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <item>
        <shape>
            <size
                android:height="30dp"
                android:width="20dp" />

            <solid android:color="@android:color/transparent" />
        </shape>
    </item>

    <item android:left="8dp" android:right="8dp">
        <shape>
            <size
                android:height="30dp"
                android:width="4dp" />

            <solid android:color="@color/dark_secondary" />
        </shape>
    </item>

</layer-list>

dark_scrollbar_fast_track.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <size android:width="@dimen/1dp" />
    <solid android:color="@color/dark_scrollbar_track" />

</shape>

dark_scrollbar_fast_thumb.xml:

<item>
    <shape>
        <size
            android:height="30dp"
            android:width="20dp" />

        <solid android:color="@android:color/transparent" />
    </shape>
</item>

<item android:left="8dp" android:right="8dp">
    <shape>
        <size
            android:height="30dp"
            android:width="4dp" />

        <solid android:color="@color/dark_secondary" />
    </shape>
</item>

dark_scrollbar_fast_track.xml:

<size android:width="@dimen/1dp" />
<solid android:color="@color/dark_scrollbar_track" />

快速滚动条始终可见,我在listviews中使用以下样式:

<item name="android:scrollbarStyle">outsideInset</item>

但结果看起来更像是outsideOverlay.我只能在Marshmallow设备上观察到这个问题.

我想找到导致它的属性,并将其从48dp更改为20dp.你能帮帮我吗？

Answer 1

我遇到了同样的问题并最终使用了解决方法。

诀窍是当用户不滚动时（或停止滚动后 1 秒）禁用快速滚动，并在用户再次开始滚动时重新激活它。为此，您需要像这样实现OnScrollListener并将侦听器设置为列表视图：

private int mCurrentState = 0;

@Override
public void onScrollStateChanged(AbsListView absListView, int state) {

    if (state == SCROLL_STATE_IDLE && mCurrentState != state && mListview.isFastScrollEnabled()){

        mListview.postDelayed(new Runnable() {
            @Override
            public void run() {
                mListview.setFastScrollEnabled(false);
            }
        },1000);

    }

    mCurrentState = state;
}

@Override
public void onScroll(AbsListView absListView, int i, int i1, int i2) {

    if (mCurrentState == SCROLL_STATE_TOUCH_SCROLL) {


        if (!mListview.isFastScrollEnabled())
            mListview.setFastScrollEnabled(true);
    }
}

希望这可以帮助你