[英]Redirect touch event on TextView with ClickableSpan to parent view
我有一個帶有TextViews的RecyclerView,其中可能包含應該可單擊的自定義主題標簽。 因此,我創建了TextView的子類,其中使用模式創建了ClickableSpan。 為了使ClickableSpan處於活動狀態,我添加了
setMovementMethod(LinkMovementMethod.getInstance())
此方法更改TextView的屬性:
setFocusable(true);
setClickable(true);
setLongClickable(true);
單擊鏈接有效,但是它阻止了可繪制的漣漪圖顯示在列表項上,而單擊井號之外的TextView將被忽略。
因此,我很感興趣如何將對TextView的觸摸(除hashtag之外的所有觸摸)重定向到其父級?
所以我沒有在互聯網上找到解決方案,所以我最終自己實現了它。
因此,我沒有將簡單的TextView與MovementMethod一起使用,而是創建了一個新類,該類使用onTouchEvent擴展文本視圖。
public class MyTextView extends TextView {
@Override
public boolean onTouchEvent(@NonNull MotionEvent event) {
if (linksActive) {
Layout layout = this.getLayout();
if (layout != null) {
int line = layout.getLineForVertical((int) event.getY());
int offset = layout.getOffsetForHorizontal(line, event.getX());
if (getText() != null && getText() instanceof Spanned) {
Spanned spanned = (Spanned) getText();
ClickableSpan[] links = spanned.getSpans(offset, offset, ClickableSpan.class);
if (links.length > 0) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
return true;
} else if (event.getAction() == MotionEvent.ACTION_UP) {
links[0].onClick(this);
} else {
return super.onTouchEvent(event);
}
}
}
}
}
return super.onTouchEvent(event);
}
}
我還創建了一個擴展ClickableSpan的類來處理點擊:
public class URLSpan extends ClickableSpan {
private String url;
private int spanType;
public URLSpan(String url, int spanType) {
this.url = url;
this.spanType = spanType;
}
public int getType() {
return spanType;
}
@Override
public void onClick(@NonNull View widget) {
if (widget instanceof OnSpanClickListener) {
((OnSpanClickListener) widget).onSpanClicked(url, type);
} else {
// ignored
}
}
}
在這種情況下,我必須自己管理跨區(在setText()
方法中)
public static void formatPhoneNumbers(@NonNull Spannable spannable, @ColorInt int color) {
Matcher matcher = MY_Patterns.PHONE_NO.matcher(spannable);
while (matcher.find()) {
if (!Linkify.sPhoneNumberMatchFilter.acceptMatch(spannable, matcher.start(), matcher.end())) {
continue;
}
removeSpans(spannable, SpanType.PHONE_NO, matcher.start(), matcher.end());
if (hasClickableSpans(spannable, matcher.start(), matcher.end())) {
// ignore different clickable spans overlap
continue;
}
final ForegroundColorSpan span = new ForegroundColorSpan(color);
final ClickableSpan urlSpan = new URLSpan(matcher.group(), SpanType.PHONE_NO);
spannable.setSpan(urlSpan, matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan(span, matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
private static void removeSpans(@NonNull Spannable spannable, int type, int start, int end) {
URLSpan[] arr = spannable.getSpans(start, end, URLSpan.class);
for (URLSpan span : arr) {
if (span.getType() == type) {
spannable.removeSpan(span);
}
}
}
private static boolean hasClickableSpans(@NonNull Spannable spannable, int start, int end) {
ClickableSpan[] arr = spannable.getSpans(start, end, ClickableSpan.class);
return arr.length > 0;
}
感謝Viktor-
我用它來允許不在可點擊范圍內的觸摸事件傳遞給父級
override fun dispatchTouchEvent(event: MotionEvent?): Boolean {
if (hasOnClickListeners() == false && linksClickable == false) {
// Avoid all touches
return false
}
// Handle avoiding touch events, if not on a clickable span
if (event != null && hasOnClickListeners() == false) {
if (layout != null) {
val line = layout.getLineForVertical(event.y.toInt())
val offset = layout.getOffsetForHorizontal(line, event.x)
if (text != null && text is Spanned) {
val spanned = text as Spanned
val spansAtPoint = spanned.getSpans(offset, offset, ClickableSpan::class.java)
if (spansAtPoint.size == 0) {
// No clickable span at event -- abort touch
return false
}
}
}
}
return super.dispatchTouchEvent(event)
}
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