我有文本“Android是一个软件堆栈”。在这个文本中,我想设置“堆栈”文本为可点击。所以,如果你点击它,它将重定向到一个新的活动(不在浏览器中)。
我试过了,但没有找到解决办法。
我有文本“Android是一个软件堆栈”。在这个文本中,我想设置“堆栈”文本为可点击。所以,如果你点击它,它将重定向到一个新的活动(不在浏览器中)。
我试过了,但没有找到解决办法。
当前回答
我做了这个helper方法,以防有人需要从字符串中开始和结束位置。
public static TextView createLink(TextView targetTextView, String completeString,
String partToClick, ClickableSpan clickableAction) {
SpannableString spannableString = new SpannableString(completeString);
// make sure the String is exist, if it doesn't exist
// it will throw IndexOutOfBoundException
int startPosition = completeString.indexOf(partToClick);
int endPosition = completeString.lastIndexOf(partToClick) + partToClick.length();
spannableString.setSpan(clickableAction, startPosition, endPosition,
Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
targetTextView.setText(spannableString);
targetTextView.setMovementMethod(LinkMovementMethod.getInstance());
return targetTextView;
}
下面是你如何使用它
private void initSignUp() {
String completeString = "New to Reddit? Sign up here.";
String partToClick = "Sign up";
ClickableTextUtil
.createLink(signUpEditText, completeString, partToClick,
new ClickableSpan() {
@Override
public void onClick(View widget) {
// your action
Toast.makeText(activity, "Start Sign up activity",
Toast.LENGTH_SHORT).show();
}
@Override
public void updateDrawState(TextPaint ds) {
super.updateDrawState(ds);
// this is where you set link color, underline, typeface etc.
int linkColor = ContextCompat.getColor(activity, R.color.blumine);
ds.setColor(linkColor);
ds.setUnderlineText(false);
}
});
}
其他回答
我编写了一个例子来解决你的问题在Kotlin。
这是准则:
val completeText = getString(R.string.terms_description)
val textToFind = getString(R.string.show_terms)
val spannableString: Spannable = SpannableString(completeText)
val startFocus = completeText.indexOf(textToFind)
val endFocus = startFocus + textToFind.length
spannableString.setSpan(object: ClickableSpan() {
override fun onClick(p0: View) {
showMessage()
}
}, startFocus, endFocus, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
show_terms.text = spannableString
show_terms.movementMethod = LinkMovementMethod.getInstance();
show_terms.highlightColor = Color.TRANSPARENT;
这是XML
<CheckBox
android:id="@+id/check_agree_terms"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/show_terms"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColorLink="@color/colorPrimary"
android:layout_toEndOf="@id/check_agree_terms"/>
这就是它的样子
在这里输入图像描述
创建优雅的Kotlin方式与扩展:
fun TextView.setClickableText(text: Spanned,
clickableText: String,
@ColorInt clickableColor: Int,
clickListener: () -> Unit) {
val spannableString = SpannableString(text)
val startingPosition: Int = text.indexOf(clickableText)
if (startingPosition > -1) {
val clickableSpan: ClickableSpan = object : ClickableSpan() {
override fun onClick(textView: View) {
clickListener()
}
override fun updateDrawState(textPaint: TextPaint) {
super.updateDrawState(textPaint)
textPaint.isUnderlineText = false
}
}
val endingPosition: Int = startingPosition + clickableText.length
spannableString.setSpan(clickableSpan, startingPosition,
endingPosition, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
spannableString.setSpan(ForegroundColorSpan(clickableColor), startingPosition,
endingPosition, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
movementMethod = LinkMovementMethod.getInstance()
highlightColor = Color.TRANSPARENT
}
setText(spannableString)
}
我做了这个helper方法,以防有人需要从字符串中开始和结束位置。
public static TextView createLink(TextView targetTextView, String completeString,
String partToClick, ClickableSpan clickableAction) {
SpannableString spannableString = new SpannableString(completeString);
// make sure the String is exist, if it doesn't exist
// it will throw IndexOutOfBoundException
int startPosition = completeString.indexOf(partToClick);
int endPosition = completeString.lastIndexOf(partToClick) + partToClick.length();
spannableString.setSpan(clickableAction, startPosition, endPosition,
Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
targetTextView.setText(spannableString);
targetTextView.setMovementMethod(LinkMovementMethod.getInstance());
return targetTextView;
}
下面是你如何使用它
private void initSignUp() {
String completeString = "New to Reddit? Sign up here.";
String partToClick = "Sign up";
ClickableTextUtil
.createLink(signUpEditText, completeString, partToClick,
new ClickableSpan() {
@Override
public void onClick(View widget) {
// your action
Toast.makeText(activity, "Start Sign up activity",
Toast.LENGTH_SHORT).show();
}
@Override
public void updateDrawState(TextPaint ds) {
super.updateDrawState(ds);
// this is where you set link color, underline, typeface etc.
int linkColor = ContextCompat.getColor(activity, R.color.blumine);
ds.setColor(linkColor);
ds.setUnderlineText(false);
}
});
}
您可以使用示例代码。您希望了解关于ClickableSpan的详细信息。请检查这份文件
SpannableString myString = new SpannableString("This is example");
ClickableSpan clickableSpan = new ClickableSpan() {
@Override
public void onClick(View textView) {
ToastUtil.show(getContext(),"Clicked Smile ");
}
};
//For Click
myString.setSpan(clickableSpan,startIndex,lastIndex,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
//For UnderLine
myString.setSpan(new UnderlineSpan(),startIndex,lastIndex,0);
//For Bold
myString.setSpan(new StyleSpan(Typeface.BOLD),startIndex,lastIndex,0);
//Finally you can set to textView.
TextView textView = (TextView) findViewById(R.id.txtSpan);
textView.setText(myString);
textView.setMovementMethod(LinkMovementMethod.getInstance());
它对文本的某些部分的可点击部分非常有帮助。
点是正则表达式中的一个特殊字符。如果你想要分隔圆点,需要将圆点转义为\\。而不是仅仅将"."传递给可扩展的文本方法。或者,也可以使用正则表达式[。在Java中通过一个点来分隔字符串。