Android项目实战（五十二）：控制EditText输入内容大小写转换

EditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            @Override
            public void afterTextChanged(Editable s) {
             // 对输入后的内容进行二次处理              
        }
        });
    

EditText.setTransformationMethod(new ReplacementTransformationMethod() {
                @Override
                protected char[] getOriginal() {
                    char[] originalCharArr = { \'a\', \'b\', \'c\', \'d\', \'e\', \'f\', \'g\', \'h\', \'i\', \'j\',\'k\',\'l\',\'m\',\'n\',\'o\',\'p\',\'q\',\'r\',\'s\',\'t\',\'u\',\'v\',\'w\',\'x\',\'y\',\'z\' };
                    return originalCharArr;
                }

                @Override
                protected char[] getReplacement() {
                    char[] replacementCharArr = { \'A\', \'B\', \'C\', \'D\', \'E\', \'F\', \'G\', \'H\', \'I\', \'J\',\'K\',\'L\',\'M\',\'N\',\'O\',\'P\',\'Q\',\'R\',\'S\',\'T\',\'U\',\'V\',\'W\',\'X\',\'Y\',\'Z\' };
                    return replacementCharArr;
                }
            });