Android 如何在 Edittext 中获取选中的单词？

Question

我正在开发一个像记事本这样的应用程序，我想在其中动态更改选定的文本格式(颜色、更改字体样式、粗体、斜体、下划线等)如何设置特定单词的格式？

Answer 1

您可以使用 getSelectionStart() 和 getSelectionEnd() 方法获取所选单词:

EditText etx=(EditText)findViewById(R.id.editext);

int startSelection=etx.getSelectionStart();
int endSelection=etx.getSelectionEnd();

String selectedText = etx.getText().substring(startSelection, endSelection);

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然后，您可以在单击按钮/其他事件时将此选定的子字符串 带到SpannableStringBuilder 之后，在完整字符串中应用您的特定格式:

格式化文本的代码:

  int startSelection=etx.getSelectionStart();
  int endSelection=etx.getSelectionEnd();

                  final SpannableStringBuilder sb = new SpannableStringBuilder(etx.getText().toString());

                        final StyleSpan bss = new StyleSpan(android.graphics.Typeface.BOLD); // Span to make text bold
                        final StyleSpan iss = new StyleSpan(android.graphics.Typeface.ITALIC); // Span to make text italic                                     
                        sb.setSpan(iss, startSelection, endSelection, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                        sb.setSpan(bss, startSelection, endSelection, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                        etx.setText(sb);    

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Reference .