我正在尝试使用模拟器进行垂直搜索栏,但我是 有点卡住了。我可以让搜索栏显示我想要的方式, 我可以得到我想要的进展,我可以修改 onTouchEvent让拇指垂直移动而不是 水平。我不能做的是让拇指移动到外面 默认29个水平像素,不使用setThumbOffset()。这个 本身不是问题。问题来自于我 根本不理解thumbOffset - 我猜。我想我可以(正确地)调整大小 小部件,我很确定我做得不对。或许我可以 如果我能搞清楚的话,只需使用thumbOffset即可。既然我可以 正确计算进度我认为我只会使用线性 小部件的进度函数*(getTop() - getBottom())但是 似乎没有这样做。但我无法弄清楚偏移是什么 以...为中心。
稍微偏离一点,我真的不确定我在做什么 onSizeChanged()是理智的,或者它是否会在以后咬我的屁股 上。
这是main.xml布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.mobilsemantic.mobipoll.SlideBar
android:id="@+id/slide"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:max="100"
android:progress="0"
android:secondaryProgress="25" />
<Button android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="Hello, I am a Button" />
<TextView android:id="@+id/tracking"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
和类(忽略调试垃圾):
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.SeekBar;
public class SlideBar extends SeekBar {
private int oHeight = 320, oWidth = 29;
private int oProgress = -1, oOffset = -1;;
private float xPos = -1, yPos = -1;
private int top = -1, bottom = -1, left = -1, right = -1;
public SlideBar(Context context) {
super(context);
}
public SlideBar(Context context, AttributeSet attrs)
{
super(context, attrs);
oOffset = this.getThumbOffset();
oProgress = this.getProgress();
}
public SlideBar(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}
protected synchronized void onMeasure(int widthMeasureSpec, intheightMeasureSpec)
{
int height = View.MeasureSpec.getSize(heightMeasureSpec);
oHeight = height;
this.setMeasuredDimension(oWidth, oHeight);
}
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(h, w, oldw, oldh);
}
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
super.onLayout(changed, l, t, r, b);
left = l;
right = r;
top = t;
bottom = b;
}
protected void onDraw(Canvas c)
{
c.rotate(90);
c.translate(0,-29);
super.onDraw(c);
}
public boolean onTouchEvent(MotionEvent event)
{
xPos = event.getX();
yPos = event.getY();
float progress = (yPos-this.getTop())/(this.getBottom()-this.getTop());
oOffset = this.getThumbOffset();
oProgress = this.getProgress();
Log.d("offset" + System.nanoTime(), new Integer(oOffset).toString());
Log.d("progress" + System.nanoTime(), new Integer(oProgress).toString());
float offset;
offset = progress * (this.getBottom()-this.getTop());
this.setThumbOffset((int)offset);
Log.d("offset_postsetprogress" + System.nanoTime(), new Integer(oOffset).toString());
Log.d("progress_postsetprogress" + System.nanoTime(), new Integer(oProgress).toString());
this.setProgress((int)(100*event.getY()/this.getBottom()));
return true;
}
}
答案 0 :(得分:17)
我已经创建了一个有效的解决方案(至少对我而言)并创建了一个垂直的SeekBar。 http://hackskrieg.wordpress.com/2012/04/20/working-vertical-seekbar-for-android/
此代码将正确选择/取消选择拇指,正确移动,正确更新监听器(仅当进度发生变化时!),正确更新/绘制进度等等。我希望它对您有帮助。
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
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);
}
private OnSeekBarChangeListener onChangeListener;
@Override
public void setOnSeekBarChangeListener(OnSeekBarChangeListener onChangeListener){
this.onChangeListener = onChangeListener;
}
private int lastProgress = 0;
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
onChangeListener.onStartTrackingTouch(this);
setPressed(true);
setSelected(true);
break;
case MotionEvent.ACTION_MOVE:
// Calling the super seems to help fix drawing problems
super.onTouchEvent(event);
int progress = getMax() - (int) (getMax() * event.getY() / getHeight());
// Ensure progress stays within boundaries of the seekbar
if(progress < 0) {progress = 0;}
if(progress > getMax()) {progress = getMax();}
// Draw progress
setProgress(progress);
// Only enact listener if the progress has actually changed
// Otherwise the listener gets called ~5 times per change
if(progress != lastProgress) {
lastProgress = progress;
onChangeListener.onProgressChanged(this, progress, true);
}
onSizeChanged(getWidth(), getHeight() , 0, 0);
onChangeListener.onProgressChanged(this, getMax() - (int) (getMax() * event.getY() / getHeight()), true);
setPressed(true);
setSelected(true);
break;
case MotionEvent.ACTION_UP:
onChangeListener.onStopTrackingTouch(this);
setPressed(false);
setSelected(false);
break;
case MotionEvent.ACTION_CANCEL:
super.onTouchEvent(event);
setPressed(false);
setSelected(false);
break;
}
return true;
}
public synchronized void setProgressAndThumb(int progress) {
setProgress(getMax() - (getMax()- progress));
onSizeChanged(getWidth(), getHeight() , 0, 0);
}
public synchronized void setMaximum(int maximum) {
setMax(maximum);
}
public synchronized int getMaximum() {
return getMax();
}
}
我刚把这个垂直的SeekBar放在一个LinearLayout中,layout_height设置为FILL_PARENT,layout_width设置为WRAP_CONTENT。
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="vertical" >
<com.safetyculture.jsadroidtablet.VerticalSeekBar
android:id="@+id/calculatorVerticalSeekBar"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_gravity="bottom"
android:max="4"
android:progress="2" />
</LinearLayout>
注意:您必须设置OnSeekBarChangeListener,否则与SeekBar交互将产生NullPointerException。
答案 1 :(得分:11)
您可以在http://560b.sakura.ne.jp/android/VerticalSlidebarExample.zip下载,我希望这可以帮助您
答案 2 :(得分:9)
对于API 11 and later
,可以使用seekbar's XML
属性(android:rotation="270")
进行垂直效果。
<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),请使用:https://github.com/AndroSelva/Vertical-SeekBar-Android或查看此sample here
您还需要更新它的身高和数量。 iftikhar建议的宽度
按顺序
seekBar.setLayoutParams(
new ViewGroup.LayoutParams(convertDpToPixels(1.0f,mContext), ViewGroup.LayoutParams.WRAP_CONTENT));
//没有经过测试..
其中
public static int convertDpToPixels(float dp, Context context){
Resources resources = context.getResources();
return (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp,
resources.getDisplayMetrics()
);
}
答案 3 :(得分:2)
看看android source。我认为您至少需要更改trackTouchEvent,并且可能还有一些其他地方需要交换x,y坐标以考虑控件的旋转。
答案 4 :(得分:0)
您可以将搜索栏保留为水平,将其置于框架布局中,然后在Java中将布局旋转90度?听起来很可行......