一个 SeekBar
可以垂直吗?由于我不是很擅长UI设计,你能否提供一些模板和示例来帮助���让 SeekBar
更美观。
一个 SeekBar
可以垂直吗?由于我不是很擅长UI设计,你能否提供一些模板和示例来帮助���让 SeekBar
更美观。
对于API 11及以上,可以使用seekbar的XML属性(android:rotation="270")实现垂直效果。
<SeekBar
android:id="@+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:rotation="270"/>
对于旧的API等级(例如API10),只需使用Selva的答案:
https://github.com/AndroSelva/Vertical-SeekBar-Android
这是一个非常好的垂直滑动条的实现方式。看一下。
http://560b.sakura.ne.jp/android/VerticalSlidebarExample.zip
这是我基于this实现的垂直和倒置SeekBar。
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()-getMin()) * event.getY() / getHeight());
setProgress(i);
Log.i("Progress",getProgress()+"");
onSizeChanged(getWidth(), getHeight(), 0, 0);
break;
case MotionEvent.ACTION_CANCEL:
break;
}
return true;
}
Math.max(0, Math.min(getMax(), i)
。 - Matthias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;
}
}
将代码粘贴并保存。现在可以在您的XML布局中使用它:
<android.widget.VerticalSeekBar
android:id="@+id/seekBar1"
android:layout_width="wrap_content"
android:layout_height="200dp"
/>
请确保创建一个名为android.widget
的包,并在该包下创建VerticalSeekBar.java
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>
我使用了Selva的解决方案,但出现了两个问题:
我解决了这两个问题。你可以在我的项目包内找到解决方案:
阿拉伯语
吗?因为这个垂直SeekBar
变成了上下颠倒,滑块给出了错误的进度方向。 - bluewarec.rotate(-90);
和c.translate(-getHeight(),0);
这两行代码进行操作 - 第二行代码会使其垂直翻转。可以尝试将旋转角度改为+90或270,而不是-90等,并且去掉翻转的平移操作。 - hippietrailandroid:rotation="270"
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>
相机曝光补偿的截图:
<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>
注意,据我观察,如果您更改宽度,则滑块宽度不会正确更改。 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。 无法联系原始创建者。
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();
}
<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>
试试这个
import android.content.Context;
import android.graphics.Canvas;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.SeekBar;
/**
* Implementation of an easy vertical SeekBar, based on the normal SeekBar.
*/
public class VerticalSeekBar extends SeekBar {
/**
* The angle by which the SeekBar view should be rotated.
*/
private static final int ROTATION_ANGLE = -90;
/**
* A change listener registrating start and stop of tracking. Need an own listener because the listener in SeekBar
* is private.
*/
private OnSeekBarChangeListener mOnSeekBarChangeListener;
/**
* Standard constructor to be implemented for all views.
*
* @param context The Context the view is running in, through which it can access the current theme, resources, etc.
* @see android.view.View#View(Context)
*/
public VerticalSeekBar(final Context context) {
super(context);
}
/**
* Standard constructor to be implemented for all views.
*
* @param context The Context the view is running in, through which it can access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @see android.view.View#View(Context, AttributeSet)
*/
public VerticalSeekBar(final Context context, final AttributeSet attrs) {
super(context, attrs);
}
/**
* Standard constructor to be implemented for all views.
*
* @param context The Context the view is running in, through which it can access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @param defStyle An attribute in the current theme that contains a reference to a style resource that supplies default
* values for the view. Can be 0 to not look for defaults.
* @see android.view.View#View(Context, AttributeSet, int)
*/
public VerticalSeekBar(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
protected final void onSizeChanged(final int width, final int height, final int oldWidth, final int oldHeight) {
super.onSizeChanged(height, width, oldHeight, oldWidth);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
protected final synchronized void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
protected final void onDraw(@NonNull final Canvas c) {
c.rotate(ROTATION_ANGLE);
c.translate(-getHeight(), 0);
super.onDraw(c);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
public final void setOnSeekBarChangeListener(final OnSeekBarChangeListener listener) {
// Do not use super for the listener, as this would not set the fromUser flag properly
mOnSeekBarChangeListener = listener;
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
public final boolean onTouchEvent(@NonNull final MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStartTrackingTouch(this);
}
break;
case MotionEvent.ACTION_MOVE:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
break;
case MotionEvent.ACTION_UP:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStopTrackingTouch(this);
}
break;
case MotionEvent.ACTION_CANCEL:
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStopTrackingTouch(this);
}
break;
default:
break;
}
return true;
}
/**
* Set the progress by the user. (Unfortunately, Seekbar.setProgressInternally(int, boolean) is not accessible.)
*
* @param progress the progress.
* @param fromUser flag indicating if the change was done by the user.
*/
public final void setProgressInternally(final int progress, final boolean fromUser) {
if (progress != getProgress()) {
super.setProgress(progress);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onProgressChanged(this, progress, fromUser);
}
}
onSizeChanged(getWidth(), getHeight(), 0, 0);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
public final void setProgress(final int progress) {
setProgressInternally(progress, false);
}
}