我有一个TextView
,其中每个单词都是一个ClickableSpan
。单击时,单词变为粗体,并且单词的字典定义显示在另一个TextView中。该应用程序正常工作,直到我使TextView中的文本可选择。当文本变为可选时,定义会在单击时显示,但该单词仅在双击时才会显示为粗体。在双击或长按时选择文本(但长按不会使单词变为粗体)。
我的猜测是,问题与在动作处理过程中绘制状态更新时有关,但我无法找到解决方法。我尝试设置TextView
focusable="false"
但没有任何改变。相关代码如下。
curSpan = new WordSpan(index) {
@Override
public void onClick(View view) {
handleWordClick(index,this); // handles code to display definition
setMarking(true);
view.invalidate();
tvText.invalidate();
}
};
spannableStringBuilder.setSpan(curSpan, totalLength, totalLength + strWord, Spanned.SPAN_COMPOSING);
和 WordSpan 定义:
class WordSpan extends ClickableSpan
{
int id;
private boolean marking = false;
public WordSpan(int id) {
this.id = id;
}
@Override
public void updateDrawState(TextPaint ds) {
ds.setColor(Color.BLACK);
ds.setUnderlineText(false);
if (marking) {
ds.setTypeface(Typeface.create(myFont,Typeface.BOLD));
}
}
@Override
public void onClick(View v) {}
public void setMarking(boolean m) {
marking = m;
}
}
设置 TextView 的移动方式:
private MovementMethod createMovementMethod ( Context context ) {
final GestureDetector detector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp ( MotionEvent e ) {
return true;
}
@Override
public boolean onSingleTapConfirmed ( MotionEvent e ) {
return true;
}
});
return new ScrollingMovementMethod() {
@Override
public boolean canSelectArbitrarily () {
return true;
}
@Override
public void initialize(TextView widget, Spannable text) {
Selection.setSelection(text, text.length());
}
@Override
public void onTakeFocus(TextView view, Spannable text, int dir) {
if ((dir & (View.FOCUS_FORWARD | View.FOCUS_DOWN)) != 0) {
if (view.getLayout() == null) {
// This shouldn't be null, but do something sensible if it is.
Selection.setSelection(text, text.length());
}
} else {
Selection.setSelection(text, text.length());
}
}
@Override
public boolean onTouchEvent ( TextView widget, Spannable buffer, MotionEvent event ) {
// check if event is a single tab
boolean isClickEvent = detector.onTouchEvent(event);
// detect span that was clicked
if (isClickEvent) {
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);
WordSpan[] link = buffer.getSpans(off, off, WordSpan.class);
if (link.length != 0) {
// execute click only for first clickable span
// can be a for each loop to execute every one
if (event.getAction() == MotionEvent.ACTION_UP) {
link[0].onClick(widget);
} else if (event.getAction() == MotionEvent.ACTION_DOWN) {
Selection.setSelection(buffer,
buffer.getSpanStart(link[0]),
buffer.getSpanEnd(link[0]));
}
return true;
}
}
// let scroll movement handle the touch
return super.onTouchEvent(widget, buffer, event);
}
};
}
编辑:我刚刚发现了一个可能有助于解决的新怪癖。如果我双击但在单击之间更改单词(点击一个单词然后快速点击另一个单词),第一次点击显示该单词的定义,第二次点击第一个单词是粗体但选择了第二个单词(突出显示) 并且仍然显示第一个单词的定义。
例如,如果我双击“first”然后“second”,当我点击“first”时,将显示“first”的定义,当我点击“second”时,单词“first”是粗体,单词“ second" 突出显示,但定义没有改变(仍然显示“first”的定义)。