如何在 Android 中制作垂直的 SeekBar？
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How to make a vertical SeekBar in Android?
提问by Chris
Can a SeekBarbe vertical? I am not very good at UI design, so how can I make the SeekBarmore beautiful, please give me some templates and examples.
aSeekBar可以是垂直的吗？我不是很擅长UI设计，所以怎么做 SeekBar更漂亮，请给我一些模板和例子。
采纳答案by Andro Selva
Here is a very good implementation of vertical seekbar. Have a look.
这是垂直搜索栏的一个很好的实现。看一看。
http://560b.sakura.ne.jp/android/VerticalSlidebarExample.zip
http://560b.sakura.ne.jp/android/VerticalSlidebarExample.zip
And Here is my own implementation for Vertical and Inverted Seekbar based on this
这是我自己的基于此的垂直和反向搜索栏的实现
https://github.com/AndroSelva/Vertical-SeekBar-Android
https://github.com/AndroSelva/Vertical-SeekBar-Android
protected void onDraw(Canvas c) {
c.rotate(-90);
c.translate(-getHeight(),0);
super.onDraw(c);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
int i=0;
i=getMax() - (int) (getMax() * event.getY() / getHeight());
setProgress(i);
Log.i("Progress",getProgress()+"");
onSizeChanged(getWidth(), getHeight(), 0, 0);
break;
case MotionEvent.ACTION_CANCEL:
break;
}
return true;
}
回答by Saturn
For API 11 and later, can use seekbar's XML attributes(android:rotation="270") for vertical effect.
<SeekBar android:id="@+id/seekBar1" android:layout_width="match_parent" android:layout_height="wrap_content" android:rotation="270"/>For older API level (ex API10), only use Selva's answer:
https://github.com/AndroSelva/Vertical-SeekBar-Android
对于 API 11 及更高版本，可以使用seekbar 的 XML 属性（android:rotation="270"）来实现垂直效果。
<SeekBar android:id="@+id/seekBar1" android:layout_width="match_parent" android:layout_height="wrap_content" android:rotation="270"/>对于较旧的 API 级别（例如 API10），仅使用 Selva 的答案：https:
//github.com/AndroSelva/Vertical-SeekBar-Android
回答by Jawad Zeb
Working example
工作示例
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
public class VerticalSeekBar extends SeekBar {
public VerticalSeekBar(Context context) {
super(context);
}
public VerticalSeekBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public VerticalSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(h, w, oldh, oldw);
}
@Override
public synchronized void setProgress(int progress) // it is necessary for calling setProgress on click of a button
{
super.setProgress(progress);
onSizeChanged(getWidth(), getHeight(), 0, 0);
}
@Override
protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}
protected void onDraw(Canvas c) {
c.rotate(-90);
c.translate(-getHeight(), 0);
super.onDraw(c);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
setProgress(getMax() - (int) (getMax() * event.getY() / getHeight()));
onSizeChanged(getWidth(), getHeight(), 0, 0);
break;
case MotionEvent.ACTION_CANCEL:
break;
}
return true;
}
}
There, paste the code and save it. Now use it in your XML layout:
在那里，粘贴代码并保存。现在在您的 XML 布局中使用它：
<android.widget.VerticalSeekBar
android:id="@+id/seekBar1"
android:layout_width="wrap_content"
android:layout_height="200dp"
/>
Make sure to create a package android.widgetand create VerticalSeekBar.javaunder this package
确保创建一个包android.widget并VerticalSeekBar.java在此包下创建
回答by Balaji Gunasekar
Try:
尝试：
<RelativeLayout 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" >
<SeekBar
android:id="@+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:rotation="270"
/>
</RelativeLayout>
回答by J?rg Eisfeld
I used Selva's solution but had two kinds of issues:
我使用了 Selva 的解决方案，但有两种问题：
- OnSeekbarChangeListener did not work properly
- Setting progress programmatically did not work properly.
- OnSeekbarChangeListener 无法正常工作
- 以编程方式设置进度无法正常工作。
I fixed these two issues. You can find the solution (within my own project package) at
我解决了这两个问题。您可以在以下位置找到解决方案（在我自己的项目包中）
回答by Maxim Mikhisor
We made a vertical SeekBar by using android:rotation="270":
我们使用android:rotation="270"以下方法制作了一个垂直的 SeekBar ：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SurfaceView
android:id="@+id/camera_sv_preview"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<LinearLayout
android:id="@+id/camera_lv_expose"
android:layout_width="32dp"
android:layout_height="200dp"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_marginRight="15dp"
android:orientation="vertical">
<TextView
android:id="@+id/camera_tv_expose"
android:layout_width="32dp"
android:layout_height="20dp"
android:textColor="#FFFFFF"
android:textSize="15sp"
android:gravity="center"/>
<FrameLayout
android:layout_width="32dp"
android:layout_height="180dp"
android:orientation="vertical">
<SeekBar
android:id="@+id/camera_sb_expose"
android:layout_width="180dp"
android:layout_height="32dp"
android:layout_gravity="center"
android:rotation="270"/>
</FrameLayout>
</LinearLayout>
<TextView
android:id="@+id/camera_tv_help"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:layout_marginBottom="20dp"
android:text="@string/camera_tv"
android:textColor="#FFFFFF" />
</RelativeLayout>
Screenshot for camera exposure compensation:
相机曝光补偿截图：
回答by Nick
This worked for me, just put it into any layout you want to.
这对我有用，只需将其放入您想要的任何布局即可。
<FrameLayout
android:layout_width="32dp"
android:layout_height="192dp">
<SeekBar
android:layout_width="192dp"
android:layout_height="32dp"
android:layout_gravity="center"
android:rotation="270" />
</FrameLayout>
回答by user602622
Note, it appears to me that if you change the width the thumb width does not change correctly. I didn't take the time to fix it right, i just fixed it for my case. Here is what i did. Couldn't figure out how to contact the original creator.
请注意，在我看来，如果您更改宽度，拇指宽度不会正确更改。我没有花时间正确修复它，我只是为我的情况修复了它。这是我所做的。不知道如何联系原作者。
public void setThumb(Drawable thumb) {
if (thumb != null) {
thumb.setCallback(this);
// Assuming the thumb drawable is symmetric, set the thumb offset
// such that the thumb will hang halfway off either edge of the
// progress bar.
//This was orginally divided by 2, seems you have to adjust here when you adjust width.
mThumbOffset = (int)thumb.getIntrinsicHeight();
}
回答by Guy West
When moving the thumbwith an EditText, the Vertical Seekbar setProgress may not work. The following code can help:
使用 EditText移动拇指时，垂直搜索栏 setProgress 可能不起作用。以下代码可以提供帮助：
@Override
public synchronized void setProgress(int progress) {
super.setProgress(progress);
updateThumb();
}
private void updateThumb() {
onSizeChanged(getWidth(), getHeight(), 0, 0);
}
This snippet code found here: https://stackoverflow.com/a/33064140/2447726
此代码段在这里找到：https: //stackoverflow.com/a/33064140/2447726
回答by Abhishek Sengupta
Wrap it inside a FrameLayout so that there is no Size issue.
将其包裹在 FrameLayout 中，这样就不会出现 Size 问题。
<FrameLayout
android:layout_width="@dimen/_20dp"
android:layout_marginStart="@dimen/_15dp"
android:layout_marginEnd="@dimen/_15dp"
android:layout_height="match_parent"
android:orientation="vertical">
<SeekBar
android:layout_width="150dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:rotation="270" />
</FrameLayout>
