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

Question

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);
}

}

Answer 1

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (isEnabled()) {
int progress = getProgress();
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_UP:
if (progress <= 0) {
View viewUp = focusSearch(View.FOCUS_UP);
if (viewUp != null) {
viewUp.requestFocus();
}
break;
}
setProgress(progress - 1);
onSizeChanged(getWidth(), getHeight(), 0, 0);
return true;
case KeyEvent.KEYCODE_DPAD_DOWN:
if (progress >= getMax()) {
View viewDown = focusSearch(View.FOCUS_DOWN);
if (viewDown != null) {
viewDown.requestFocus();
}
break;
}
setProgress(progress + 1);
onSizeChanged(getWidth(), getHeight(), 0, 0);
return true;
case KeyEvent.KEYCODE_DPAD_LEFT:
View viewLeft = focusSearch(View.FOCUS_LEFT);
if (viewLeft != null) {
viewLeft.requestFocus();
}
return true;
case KeyEvent.KEYCODE_DPAD_RIGHT:
View viewRight = focusSearch(View.FOCUS_RIGHT);
if (viewRight != null) {
viewRight.requestFocus();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}

    修改了一下key事件