Android 自定义 SeekBar

Posted 2023-03-24

参考技术A ps ： seekBar 两边设置的有外边距间距，
android:layout_marginHorizontal="@dimen/dp_16"

seekbar.xml

android关于自定义seekbar控件的问题（将横向seekbar改成竖向seekbar）

自定义了个seekbar，将横向的seekbar改为了竖向的seekbar，目前只支持触摸，但是用遥控器控制时候按上下按钮没响应，按下左右按钮seekbar才会被拖动 追了下代码seekbar继承自AbsSeekbar,AbsSeekBar继承自progressBar,ProgressBar继承自View，我该如何实现将按下左右键seekbar的progress值发生改变改为按下上下键seekbar的progress值发生改变？以下是我写的自定义seekbar的代码：

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.SeekBar;

public class VerticalSeekBarTwo extends SeekBar

public VerticalSeekBarTwo(Context context, AttributeSet attrs, int defStyle)
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub


public VerticalSeekBarTwo(Context context, AttributeSet attrs)
super(context, attrs);
// TODO Auto-generated constructor stub


public VerticalSeekBarTwo(Context context)
super(context);
// TODO Auto-generated constructor stub


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);


@Override
public synchronized void setProgress(int progress)
super.setProgress(progress);
onSizeChanged(getWidth(), getHeight(), 0, 0);


@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;


@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
if (isEnabled())
int progress = getProgress();
switch (keyCode)
case KeyEvent.KEYCODE_DPAD_UP:
if (progress <= 0) break;
setProgress(progress - 1);
return true;
case KeyEvent.KEYCODE_DPAD_DOWN:
if (progress >= getMax()) break;
setProgress(progress + 1);
return true;
case KeyEvent.KEYCODE_DPAD_LEFT:
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
break;


return super.onKeyDown(keyCode, event);

参考技术A 是不是按键值出错了，你在onKeyDown里每次按键都打印出来按键值System.out.println("键值："+keyCode);
然后看看按键值是不是跟你写的对应追问

谢谢你了，自己搞反了，已经解决了，话说现在这百度知道的效果不行啊，这问题上周发出去的。

追答

我没注意时间。。。