我有一个具有ClickableSpan的SpannableString，如下所示
for (int i = 0; i < items.size(); i++) {
final SpannableString span = new SpannableString(items.get(i));
final int index=i;
span.setSpan(new ClickableSpan() {
@Override
public void onClick(View widget) {
}
@Override
public void updateDrawState(TextPaint ds) {
ds.setColor(Color.LTGRAY);
ds.setUnderlineText(false);
}
}, 0, span.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
builder.append(span);
}
//my text view
txt.setText(builder);
txt.setMovementMethod(LinkMovementMethod.getInstance());
我想做的是单击时更改跨度的前景色。
我怎样才能做到这一点 ？
最佳答案
我扩展了clickableSpan类，并为其传递了一个标志，让我知道我应该突出显示它。
SpannableStringBuilder tag;
.... tag.setSpan(new WordSpan(i, tokens[i], wordtohighlitedID) {
.....
import android.graphics.Color;
import android.text.TextPaint;
import android.text.style.ClickableSpan;
import android.view.View;
public class WordSpan extends ClickableSpan
{
private int id;
private TextPaint textpaint;
public boolean shouldHilightWord = false;
public WordSpan(int anID, String txt, int selected) {
id =anID;
// if the word selected is the same as the ID set the highlight flag
if(selected == id) {
shouldHilightWord = true;
}
}
@Override
public void updateDrawState(TextPaint ds) {
textpaint = ds;
ds.setColor(ds.linkColor);
if(shouldHilightWord){
textpaint.bgColor = Color.GRAY;
textpaint.setARGB(255, 255, 255, 255);
}
//Remove default underline associated with spans
ds.setUnderlineText(false);
}
public void changeSpanBgColor(View widget){
shouldHilightWord = true;
updateDrawState(textpaint);
widget.invalidate();
}
@Override
public void onClick(View widget) {
// TODO Auto-generated method stub
}
/**
* This function sets the span to record the word number, as the span ID
* @param spanID
*/
public void setSpanTextID(int spanID){
id = spanID;
}
/**
* Return the wordId of this span
* @return id
*/
public int getSpanTextID(){
return id;
}
}
关于android - Android:点击时更改ClickableSpan的背景颜色，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15851655/