我正在开发一个简单的文本编辑器,在android中有一些基本选项,如粗体,斜体,粗体+斜体,下划线。以下是我在单击相应按钮时将效果应用于所选文本的代码。
public void buttonClick(View target){
Log.i("Information ", "In click");
View parentView = (View) target.getParent();
final EditText editorField = (EditText) parentView.findViewById(R.id.editor_field);
int startSelection = editorField.getSelectionStart();
int endSelection = editorField.getSelectionEnd();
Spannable textEdit = editorField.getText();
if(target.getId() == R.id.boldButton){
textEdit.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), startSelection, endSelection, 0);
} else if(target.getId() == R.id.italicButton){
textEdit.setSpan(new StyleSpan(android.graphics.Typeface.ITALIC), startSelection, endSelection, 0);
} else if(target.getId() == R.id.underlineButton){
textEdit.setSpan(new UnderlineSpan(), startSelection, endSelection, Spannable.SPAN_MARK_MARK);
} else if(target.getId() == R.id.strikeButton){
textEdit.setSpan(new StrikethroughSpan(), startSelection, endSelection, Spannable.SPAN_MARK_MARK);
} else if(target.getId() == R.id.boldItalicButton){
textEdit.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), startSelection, endSelection, 0);
}
}
但是在应用文本效果之前,我必须检查所选文本是否已经具有任何文本效果。即最初所选文本以粗体显示,因此当单击粗体按钮时,必须删除该文本效果。我不明白该怎么做。任何人都可以帮助我。
问候。
答案 0 :(得分:1)
您可以获取调用getSpans()方法的样式列表:
StyleSpan[] styleSpans = textEdit.getSpans(startSelection, endSelection, StyleSpan.class);
然后使用StyleSpan类的方法:
if (styleSpans[i].getStyle() == android.graphics.Typeface.BOLD){
...
}