android的clickable功能,android – 展开ClickableSpan的触控区域

CustomMovementMethod必须扩展ScrollingMovementMethod并覆盖onTouchEvent方法.为了增加一些额外空间,您必须在尺寸中定义它并在开始/结束范围中使用它.

@Override

public boolean onTouchEvent(TextView widget,Spannable buffer,MotionEvent event) {

int action = event.getAction();

if (action == MotionEvent.ACTION_UP ||

action == MotionEvent.ACTION_DOWN) {

int x = (int) event.getX();

int y = (int) event.getY();

x -= widget.getTotalPaddingLeft();

y -= widget.getTotalPaddingTop();

x += widget.getScrollX();

y += widget.getScrollY();

Layout layout = widget.getLayout();

int line = layout.getLineForVertical(y);

int off = layout.getOffsetForHorizontal(line,x);

int startSpan = off - context.getResources().getDimension(R.dimen.extra_space_start);

int endSpan = off + context.getResources().getDimension(R.dimen.extra_space_end);

ClickableSpan[] link = buffer.getSpans(startSpan,endSpan,ClickableSpan.class);

if (link.length != 0) {

if (action == MotionEvent.ACTION_UP) {

link[0].onClick(widget);

} else if (action == MotionEvent.ACTION_DOWN) {

Selection.setSelection(buffer,buffer.getSpanStart(link[0]),buffer.getSpanEnd(link[0]));

}

return true;

} else {

Selection.removeSelection(buffer);

}

}

return super.onTouchEvent(widget,buffer,event);

}

您可以像这样调用自定义链接移动：

textView.setMovementMethod(new CustomLinkMovementMethod(context));

textView.setLinksClickable(true);