RecyclerView 中的滚动条颜色
Scrollbar color in RecyclerView
如何更改 recyclerView 中滚动条的颜色?
我有滚动条,但我想改变它的颜色。
我的 recyclerView 是这样的:
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/recyclerView"
android:layout_below="@id/my_toolbar"
android:layout_above="@+id/progressBar"
android:scrollbars="vertical"
/>
您可以通过在 Recyclerview 中包含以下代码行来做到这一点
android:scrollbarThumbVertical="@drawable/yoursdrawablefile
我的可绘制文件是:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient android:startColor="#000" android:endColor="#000"
android:angle="45"/>
<corners android:radius="6dp" />
</shape>
如果您想进一步设计滚动条的样式,请在您的可绘制文件夹中创建两个可绘制资源文件 1. scrollbar_track 和 2. scrollbar_thumb
scrollbar_track.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<gradient
android:angle="0"
android:endColor="#9BA3C5"
android:startColor="#8388A4" />
<corners android:radius="6dp" />
</shape>
scrollbar_thumb.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<gradient
android:angle="0"
android:endColor="#b20111"
android:startColor="#cf1d2d" />
<corners android:radius="6dp" />
</shape>
现在,在您的 styles.xml
文件中创建一个名为 scrollbar_style 的样式:
<style name="scrollbar_style">
<item name="android:scrollbarAlwaysDrawVerticalTrack">true</item>
<item name="android:scrollbarStyle">outsideOverlay</item>
<item name="android:scrollbars">vertical</item>
<item name="android:fadeScrollbars">true</item>
<item name="android:scrollbarThumbVertical">@drawable/scrollbar_thumb</item>
<item name="android:scrollbarTrackVertical">@drawable/scrollbar_track</item>
<item name="android:scrollbarSize">8dp</item>
<item name="android:scrollbarFadeDuration">800</item>
<item name="android:scrollbarDefaultDelayBeforeFade">500</item>
</style>
最后,要将此样式应用到您的回收视图中的滚动条,请添加
style="@style/scrollbar_style"
到您的回收者视图。
你的情况:
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/recyclerView"
style="@style/scrollbar_style"
android:layout_below="@id/my_toolbar"
android:layout_above="@+id/progressBar"
android:scrollbars="vertical"
/>
如果你需要在运行时改变颜色,就是这样。
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.support.annotation.ColorInt;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
/**
* Created on 22.3.2016.
*
* @author Bojan Kseneman
* @description A recycler view that will draw the scroll bar with a different color
*/
public class CustomScrollBarRecyclerView extends RecyclerView {
private int scrollBarColor = Color.RED;
public CustomScrollBarRecyclerView(Context context) {
super(context);
}
public CustomScrollBarRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomScrollBarRecyclerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void setScrollBarColor(@ColorInt int scrollBarColor) {
this.scrollBarColor = scrollBarColor;
}
/**
* Called by Android {@link android.view.View#onDrawScrollBars(Canvas)}
**/
protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, int l, int t, int r, int b) {
scrollBar.setColorFilter(scrollBarColor, PorterDuff.Mode.SRC_ATOP);
scrollBar.setBounds(l, t, r, b);
scrollBar.draw(canvas);
}
/**
* Called by Android {@link android.view.View#onDrawScrollBars(Canvas)}
**/
protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, int l, int t, int r, int b) {
scrollBar.setColorFilter(scrollBarColor, PorterDuff.Mode.SRC_ATOP);
scrollBar.setBounds(l, t, r, b);
scrollBar.draw(canvas);
}
}
这些方法是在 View class 中定义的,因此同样的原则也适用于其他视图,如 ScrollView 和 ListView。
如何更改 recyclerView 中滚动条的颜色?
我有滚动条,但我想改变它的颜色。 我的 recyclerView 是这样的:
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/recyclerView"
android:layout_below="@id/my_toolbar"
android:layout_above="@+id/progressBar"
android:scrollbars="vertical"
/>
您可以通过在 Recyclerview 中包含以下代码行来做到这一点
android:scrollbarThumbVertical="@drawable/yoursdrawablefile
我的可绘制文件是:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient android:startColor="#000" android:endColor="#000"
android:angle="45"/>
<corners android:radius="6dp" />
</shape>
如果您想进一步设计滚动条的样式,请在您的可绘制文件夹中创建两个可绘制资源文件 1. scrollbar_track 和 2. scrollbar_thumb
scrollbar_track.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<gradient
android:angle="0"
android:endColor="#9BA3C5"
android:startColor="#8388A4" />
<corners android:radius="6dp" />
</shape>
scrollbar_thumb.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<gradient
android:angle="0"
android:endColor="#b20111"
android:startColor="#cf1d2d" />
<corners android:radius="6dp" />
</shape>
现在,在您的 styles.xml
文件中创建一个名为 scrollbar_style 的样式:
<style name="scrollbar_style">
<item name="android:scrollbarAlwaysDrawVerticalTrack">true</item>
<item name="android:scrollbarStyle">outsideOverlay</item>
<item name="android:scrollbars">vertical</item>
<item name="android:fadeScrollbars">true</item>
<item name="android:scrollbarThumbVertical">@drawable/scrollbar_thumb</item>
<item name="android:scrollbarTrackVertical">@drawable/scrollbar_track</item>
<item name="android:scrollbarSize">8dp</item>
<item name="android:scrollbarFadeDuration">800</item>
<item name="android:scrollbarDefaultDelayBeforeFade">500</item>
</style>
最后,要将此样式应用到您的回收视图中的滚动条,请添加
style="@style/scrollbar_style"
到您的回收者视图。
你的情况:
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/recyclerView"
style="@style/scrollbar_style"
android:layout_below="@id/my_toolbar"
android:layout_above="@+id/progressBar"
android:scrollbars="vertical"
/>
如果你需要在运行时改变颜色,就是这样。
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.support.annotation.ColorInt;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
/**
* Created on 22.3.2016.
*
* @author Bojan Kseneman
* @description A recycler view that will draw the scroll bar with a different color
*/
public class CustomScrollBarRecyclerView extends RecyclerView {
private int scrollBarColor = Color.RED;
public CustomScrollBarRecyclerView(Context context) {
super(context);
}
public CustomScrollBarRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomScrollBarRecyclerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void setScrollBarColor(@ColorInt int scrollBarColor) {
this.scrollBarColor = scrollBarColor;
}
/**
* Called by Android {@link android.view.View#onDrawScrollBars(Canvas)}
**/
protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, int l, int t, int r, int b) {
scrollBar.setColorFilter(scrollBarColor, PorterDuff.Mode.SRC_ATOP);
scrollBar.setBounds(l, t, r, b);
scrollBar.draw(canvas);
}
/**
* Called by Android {@link android.view.View#onDrawScrollBars(Canvas)}
**/
protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, int l, int t, int r, int b) {
scrollBar.setColorFilter(scrollBarColor, PorterDuff.Mode.SRC_ATOP);
scrollBar.setBounds(l, t, r, b);
scrollBar.draw(canvas);
}
}
这些方法是在 View class 中定义的,因此同样的原则也适用于其他视图,如 ScrollView 和 ListView。