android - 在 TextView/EditText 中点击一个单词

Question

如何在 android 的 TextView/EditText 中点击一个单词。我在 TextView/EditText 中有一些文本，当用户点击一个单词时，我希望选择该单词，然后当我调用 getSelectedText() 之类的方法时，它应该返回我选择的单词。 任何帮助将不胜感激。

我的目标是在用户点击 TextView/EditText 中的特定单词时执行一些操作。

Answer 1

更新:另一个更好的方法是使用 BreakIterator:

private void init() {
    String definition = "Clickable words in text view ".trim();
    TextView definitionView = (TextView) findViewById(R.id.text);
    definitionView.setMovementMethod(LinkMovementMethod.getInstance());
    definitionView.setText(definition, BufferType.SPANNABLE);
    Spannable spans = (Spannable) definitionView.getText();
    BreakIterator iterator = BreakIterator.getWordInstance(Locale.US);
    iterator.setText(definition);
    int start = iterator.first();
    for (int end = iterator.next(); end != BreakIterator.DONE; start = end, end = iterator
            .next()) {
        String possibleWord = definition.substring(start, end);
        if (Character.isLetterOrDigit(possibleWord.charAt(0))) {
            ClickableSpan clickSpan = getClickableSpan(possibleWord);
            spans.setSpan(clickSpan, start, end,
                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }
}

private ClickableSpan getClickableSpan(final String word) {
    return new ClickableSpan() {
        final String mWord;
        {
            mWord = word;
        }

        @Override
        public void onClick(View widget) {
            Log.d("tapped on:", mWord);
            Toast.makeText(widget.getContext(), mWord, Toast.LENGTH_SHORT)
                    .show();
        }

        public void updateDrawState(TextPaint ds) {
            super.updateDrawState(ds);
        }
    };
}

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老答案

我想在自己的 Activity 中处理点击。我通过以下代码解决了它:

private void init(){
    String definition = "Clickable words in text view ".trim();
    TextView definitionView = (TextView) findViewById(R.id.definition);
    definitionView.setMovementMethod(LinkMovementMethod.getInstance());
    definitionView.setText(definition, BufferType.SPANNABLE);

    Spannable spans = (Spannable) definitionView.getText();
    Integer[] indices = getIndices(
            definitionView.getText().toString(), ' ');
    int start = 0;
    int end = 0;
      // to cater last/only word loop will run equal to the length of indices.length
    for (int i = 0; i <= indices.length; i++) {
        ClickableSpan clickSpan = getClickableSpan();
       // to cater last/only word
        end = (i < indices.length ? indices[i] : spans.length());
        spans.setSpan(clickSpan, start, end,
                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        start = end + 1;
    }
}
private ClickableSpan getClickableSpan(){
     return new ClickableSpan() {
            @Override
            public void onClick(View widget) {
                TextView tv = (TextView) widget;
                String s = tv
                        .getText()
                        .subSequence(tv.getSelectionStart(),
                                tv.getSelectionEnd()).toString();
                Log.d("tapped on:", s);
            }

            public void updateDrawState(TextPaint ds) {
                 super.updateDrawState(ds);
            }
        };
}
public static Integer[] getIndices(String s, char c) {
    int pos = s.indexOf(c, 0);
    List<Integer> indices = new ArrayList<Integer>();
    while (pos != -1) {
        indices.add(pos);
        pos = s.indexOf(c, pos + 1);
    }
    return (Integer[]) indices.toArray(new Integer[0]);
}