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1.获取光标位置
int index = editText.getSelectionStart();
2.在光标处插入字符
int index = editText.getSelectionStart(); Editable editable = editText.getText(); editable.insert(index, "aaaa");
3.删除光标前字符
int index = editText.getSelectionStart(); Editable editable = editText.getText(); editable.delete(index-1, index);
Android EditText获取光标位置并插入字符删除字符
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原文地址：http://www.cnblogs.com/zhujiabin/p/4272783.html
