问题
I have the text \"Android is a Software stack\". In this text i want to set the \"stack\" text is clickable. in the sense if you click on that it will redirected to a new activity(not in the browser).
I tried but i am not getting.
回答1:
android.text.style.ClickableSpan can solve your problem.
SpannableString ss = new SpannableString("Android is a Software stack");
ClickableSpan clickableSpan = new ClickableSpan() {
@Override
public void onClick(View textView) {
startActivity(new Intent(MyActivity.this, NextActivity.class));
}
@Override
public void updateDrawState(TextPaint ds) {
super.updateDrawState(ds);
ds.setUnderlineText(false);
}
};
ss.setSpan(clickableSpan, 22, 27, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
TextView textView = (TextView) findViewById(R.id.hello);
textView.setText(ss);
textView.setMovementMethod(LinkMovementMethod.getInstance());
textView.setHighlightColor(Color.TRANSPARENT);
In XML:
<TextView
...
android:textColorLink="@drawable/your_selector"
/>
回答2:
My function for make multiple links inside TextView
fun TextView.makeLinks(vararg links: Pair<String, View.OnClickListener>) {
val spannableString = SpannableString(this.text)
for (link in links) {
val clickableSpan = object : ClickableSpan() {
override fun onClick(view: View) {
Selection.setSelection((view as TextView).text as Spannable, 0)
view.invalidate()
link.second.onClick(view)
}
}
val startIndexOfLink = this.text.toString().indexOf(link.first)
spannableString.setSpan(clickableSpan, startIndexOfLink, startIndexOfLink + link.first.length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
}
this.movementMethod = LinkMovementMethod.getInstance() // without LinkMovementMethod, link can not click
this.setText(spannableString, TextView.BufferType.SPANNABLE)
}
USING
my_text_view.makeLinks(
Pair("Terms of Service", View.OnClickListener {
Toast.makeText(applicationContext, "Terms of Service Clicked", Toast.LENGTH_SHORT).show()
}),
Pair("Privacy Policy", View.OnClickListener {
Toast.makeText(applicationContext, "Privacy Policy Clicked", Toast.LENGTH_SHORT).show()
}))
XML
<TextView
android:id="@+id/my_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Please accept Terms of Service and Privacy Policy"
android:textColorHighlight="#f00" // background color when pressed
android:textColorLink="#0f0"
android:textSize="20sp" />
DEMO
Reference
Solution for clear the link highlight selection follow https://stackoverflow.com/a/19445108/5381331
回答3:
You can use ClickableSpan as described in this post
Sample code:
TextView myTextView = new TextView(this);
String myString = "Some text [clickable]";
int i1 = myString.indexOf("[");
int i2 = myString.indexOf("]");
myTextView.setMovementMethod(LinkMovementMethod.getInstance());
myTextView.setText(myString, BufferType.SPANNABLE);
Spannable mySpannable = (Spannable)myTextView.getText();
ClickableSpan myClickableSpan = new ClickableSpan() {
@Override
public void onClick(View widget) { /* do something */ }
};
mySpannable.setSpan(myClickableSpan, i1, i2 + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
Reference
回答4:
You can use sample code. You want to learn detail about ClickableSpan. Please check this documentaion
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());
回答5:
I made this helper method in case someone need start and end position from a String.
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;
}
And here is how you use it
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);
}
});
}
回答6:
t= (TextView) findViewById(R.id.PP1);
t.setText(Html.fromHtml("<bThis is normal text </b>" +
"<a href=\"http://www.xyz-zyyx.com\">This is cliclable text</a> "));
t.setMovementMethod(LinkMovementMethod.getInstance());
回答7:
Kotlin Version of Phan Van Linh's answer.
Please note it has some minor modifications.
fun makeLinks(textView: TextView, links: Array<String>, clickableSpans: Array<ClickableSpan>) {
val spannableString = SpannableString(textView.text)
for (i in links.indices) {
val clickableSpan = clickableSpans[i]
val link = links[i]
val startIndexOfLink = textView.text.indexOf(link)
spannableString.setSpan(clickableSpan, startIndexOfLink, startIndexOfLink + link.length,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
}
textView.movementMethod = LinkMovementMethod.getInstance()
textView.setText(spannableString, TextView.BufferType.SPANNABLE)
}
fun setupClickableTextView() {
val termsOfServicesClick = object : ClickableSpan() {
override fun onClick(p0: View?) {
Toast.makeText(applicationContext, "ToS clicked", Toast.LENGTH_SHORT).show()
}
}
val privacyPolicyClick = object : ClickableSpan() {
override fun onClick(p0: View?) {
Toast.makeText(applicationContext, "PP clicked", Toast.LENGTH_SHORT).show()
}
}
makeLinks(termsTextView, arrayOf("terms", "privacy policy"), arrayOf(termsOfServicesClick, privacyPolicyClick))
}
回答8:
Here is a Kotlin method to make parts of a TextView clickable:
private fun makeTextLink(textView: TextView, str: String, underlined: Boolean, color: Int?, action: (() -> Unit)? = null) {
val spannableString = SpannableString(textView.text)
val textColor = color ?: textView.currentTextColor
val clickableSpan = object : ClickableSpan() {
override fun onClick(textView: View) {
action?.invoke()
}
override fun updateDrawState(drawState: TextPaint) {
super.updateDrawState(drawState)
drawState.isUnderlineText = underlined
drawState.color = textColor
}
}
val index = spannableString.indexOf(str)
spannableString.setSpan(clickableSpan, index, index + str.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
textView.text = spannableString
textView.movementMethod = LinkMovementMethod.getInstance()
textView.highlightColor = Color.TRANSPARENT
}
It can be called multiple times to create several links within a TextView:
makeTextLink(myTextView, str, false, Color.RED, action = { Log.d("onClick", "link") })
makeTextLink(myTextView, str1, true, null, action = { Log.d("onClick", "link1") })
回答9:
For bold,
mySpannable.setSpan(new StyleSpan(Typeface.BOLD),termStart,termStop,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
回答10:
I would suggest a different approach that I think requires less code and is more "localization-friendly".
Supposing that your destination activity is called "ActivityStack", define in the manifest an intent filter for it with a custom scheme (e.g. "myappscheme") in AndroidManifest.xml:
<activity
android:name=".ActivityStack">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:host="stack"/>
<data android:scheme="myappscheme" />
</intent-filter>
</activity>
Define the TextView without any special tag (it is important to NOT use the "android:autoLink" tag, see: https://stackoverflow.com/a/20647011/1699702):
<TextView
android:id="@+id/stackView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/stack_string" />
then use a link with custom scheme and host in the text of the TextView as (in String.xml):
<string name="stack_string">Android is a Software <a href="myappscheme://stack">stack</a></string>
and "activate" the link with setMovementMethod() (in onCreate() for activities or onCreateView() for fragments):
TextView stack = findViewById(R.id.stackView);
stack.setMovementMethod(LinkMovementMethod.getInstance());
This will open the stack activity with a tap on the "stack" word.
回答11:
You can you this method to set the clickable value
public void setClickableString(String clickableValue, String wholeValue, TextView yourTextView){
String value = wholeValue;
SpannableString spannableString = new SpannableString(value);
int startIndex = value.indexOf(clickableValue);
int endIndex = startIndex + clickableValue.length();
spannableString.setSpan(new ClickableSpan() {
@Override
public void updateDrawState(TextPaint ds) {
super.updateDrawState(ds);
ds.setUnderlineText(false); // <-- this will remove automatic underline in set span
}
@Override
public void onClick(View widget) {
// do what you want with clickable value
}
}, startIndex, endIndex, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
yourTextView.setText(spannableString);
yourTextView.setMovementMethod(LinkMovementMethod.getInstance()); // <-- important, onClick in ClickableSpan won't work without this
}
This is how to use it:
TextView myTextView = findViewById(R.id.myTextView);
setClickableString("stack", "Android is a Software stack", myTextView);
回答12:
This is my MovementMethod for detecting link/text/image clicks. It is modified LinkMovementMethod.
import android.text.Layout;
import android.text.NoCopySpan;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.ScrollingMovementMethod;
import android.text.style.ClickableSpan;
import android.text.style.ImageSpan;
import android.text.style.URLSpan;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;
public class ClickMovementMethod extends ScrollingMovementMethod {
private Object FROM_BELOW = new NoCopySpan.Concrete();
private static final int CLICK = 1;
private static final int UP = 2;
private static final int DOWN = 3;
private Listener listener;
public void setListener(Listener listener) {
this.listener = listener;
}
@Override
public boolean canSelectArbitrarily() {
return true;
}
@Override
protected boolean handleMovementKey(TextView widget, Spannable buffer, int keyCode,
int movementMetaState, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
case KeyEvent.KEYCODE_ENTER:
if (KeyEvent.metaStateHasNoModifiers(movementMetaState)) {
if (event.getAction() == KeyEvent.ACTION_DOWN &&
event.getRepeatCount() == 0 && action(CLICK, widget, buffer)) {
return true;
}
}
break;
}
return super.handleMovementKey(widget, buffer, keyCode, movementMetaState, event);
}
@Override
protected boolean up(TextView widget, Spannable buffer) {
if (action(UP, widget, buffer)) {
return true;
}
return super.up(widget, buffer);
}
@Override
protected boolean down(TextView widget, Spannable buffer) {
if (action(DOWN, widget, buffer)) {
return true;
}
return super.down(widget, buffer);
}
@Override
protected boolean left(TextView widget, Spannable buffer) {
if (action(UP, widget, buffer)) {
return true;
}
return super.left(widget, buffer);
}
@Override
protected boolean right(TextView widget, Spannable buffer) {
if (action(DOWN, widget, buffer)) {
return true;
}
return super.right(widget, buffer);
}
private boolean action(int what, TextView widget, Spannable buffer) {
Layout layout = widget.getLayout();
int padding = widget.getTotalPaddingTop() +
widget.getTotalPaddingBottom();
int areatop = widget.getScrollY();
int areabot = areatop + widget.getHeight() - padding;
int linetop = layout.getLineForVertical(areatop);
int linebot = layout.getLineForVertical(areabot);
int first = layout.getLineStart(linetop);
int last = layout.getLineEnd(linebot);
ClickableSpan[] candidates = buffer.getSpans(first, last, URLSpan.class);
int a = Selection.getSelectionStart(buffer);
int b = Selection.getSelectionEnd(buffer);
int selStart = Math.min(a, b);
int selEnd = Math.max(a, b);
if (selStart < 0) {
if (buffer.getSpanStart(FROM_BELOW) >= 0) {
selStart = selEnd = buffer.length();
}
}
if (selStart > last)
selStart = selEnd = Integer.MAX_VALUE;
if (selEnd < first)
selStart = selEnd = -1;
switch (what) {
case CLICK:
if (selStart == selEnd) {
return false;
}
if (listener != null) {
URLSpan[] link = buffer.getSpans(selStart, selEnd, URLSpan.class);
if (link.length >= 1) {
listener.onClick(link[0].getURL());
} else {
ImageSpan[] image = buffer.getSpans(selStart, selEnd, ImageSpan.class);
if (image.length >= 1) {
listener.onImageClicked(image[0].getSource());
} else {
listener.onTextClicked();
}
}
}
break;
case UP:
int beststart, bestend;
beststart = -1;
bestend = -1;
for (int i = 0; i < candidates.length; i++) {
int end = buffer.getSpanEnd(candidates[i]);
if (end < selEnd || selStart == selEnd) {
if (end > bestend) {
beststart = buffer.getSpanStart(candidates[i]);
bestend = end;
}
}
}
if (beststart >= 0) {
Selection.setSelection(buffer, bestend, beststart);
return true;
}
break;
case DOWN:
beststart = Integer.MAX_VALUE;
bestend = Integer.MAX_VALUE;
for (int i = 0; i < candidates.length; i++) {
int start = buffer.getSpanStart(candidates[i]);
if (start > selStart || selStart == selEnd) {
if (start < beststart) {
beststart = start;
bestend = buffer.getSpanEnd(candidates[i]);
}
}
}
if (bestend < Integer.MAX_VALUE) {
Selection.setSelection(buffer, beststart, bestend);
return true;
}
break;
}
return false;
}
@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);
URLSpan[] link = buffer.getSpans(off, off, URLSpan.class);
if (action == MotionEvent.ACTION_UP) {
if (listener != null) {
if (link.length >= 1) {
listener.onClick(link[0].getURL());
} else {
ImageSpan[] image = buffer.getSpans(off, off, ImageSpan.class);
if (image.length >= 1) {
listener.onImageClicked(image[0].getSource());
} else if (Selection.getSelectionStart(buffer) == Selection.getSelectionEnd(buffer)) {
listener.onTextClicked();
}
}
}
}
if (action == MotionEvent.ACTION_DOWN && link.length != 0) {
Selection.setSelection(buffer,
buffer.getSpanStart(link[0]),
buffer.getSpanEnd(link[0]));
return true;
}
if (link.length == 0) {
Selection.removeSelection(buffer);
}
}
return super.onTouchEvent(widget, buffer, event);
}
@Override
public void initialize(TextView widget, Spannable text) {
Selection.removeSelection(text);
text.removeSpan(FROM_BELOW);
}
@Override
public void onTakeFocus(TextView view, Spannable text, int dir) {
Selection.removeSelection(text);
if ((dir & View.FOCUS_BACKWARD) != 0) {
text.setSpan(FROM_BELOW, 0, 0, Spannable.SPAN_POINT_POINT);
} else {
text.removeSpan(FROM_BELOW);
}
}
public interface Listener {
void onClick(String clicked);
void onTextClicked();
void onImageClicked(String source);
}
}
回答13:
It really helpful for the clickable part for some portion of the text.
The dot is a special character in the regular expression. If you want to spanable the dot need to escape dot as \\. instead of just passing "." to the spanable text method. Alternatively, you can also use the regular expression [.] to spanable the String by a dot in Java.
来源：https://stackoverflow.com/questions/10696986/how-to-set-the-part-of-the-text-view-is-clickable