安卓自定义seekbar FromUser始终为false

Question

public class VerticalSeekBar extends SeekBar {
public VerticalSeekBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}

public VerticalSeekBar(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public VerticalSeekBar(Context context) {
    super(context);
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(h, w, oldh, oldw);
}

@Override
protected synchronized void onDraw(Canvas canvas) {
    canvas.rotate(-90);
    canvas.translate(-getHeight(), 0);
    super.onDraw(canvas);
}

@Override
protected synchronized void onMeasure(int widthMeasureSpec,
        int heightMeasureSpec) {
    super.onMeasure(heightMeasureSpec, widthMeasureSpec);
    setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth() + 100);
}

@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;
}

// 解决调用setProgress（）方法时滑块不跟随的bug
@Override
public synchronized void setProgress(int progress) {
    super.setProgress(progress);
    onSizeChanged(getWidth(), getHeight(), 0, 0);
}

Answer 1

你可以看看一下setProgress()这个方法是怎么实现，它的调用了setProgressInternal()方法，其中第二个参数就是fromuser，你在滑动时简单调用了setProgress(),所有一直返回false