Android覆盖ondraw int EditText

Question

我试图在EditText中覆盖ondraw，使用canvas在EditText上写单词。 但是当我在EditText中设置setInputType时，它无法显示任何单词。 我不知道它是如何运作的。

    public class Input extends EditText{

        private static int paddingHintText = 30;
        private static int paddingInput = 200;
        private static int hintTextSize = 40;
        private String textString = "test";

        Paint paint;
        public Input(Context context, AttributeSet attrs) {
            super(context, attrs);
            // TODO Auto-generated constructor stub
            setBackgroundResource(R.drawable.editseletor);
            setPadding(paddingInput, 0, 0, 0);
            setGravity(Gravity.CENTER);
//if I use it,it can't display any words
        //setInputType(InputType.TYPE_CLASS_TEXT|InputType.TYPE_TEXT_VARIATION_PASSWORD);
            paint = new Paint();
        }

        @Override
        protected void onDraw(Canvas canvas) {
            // TODO Auto-generated method stub

            paint.setColor(Color.rgb(50, 50, 50));
            paint.setTextSize(hintTextSize);
            canvas.drawText(textString, paddingHintText, this.getHeight()/2+hintTextSize/2-5, paint);
            canvas.drawLine(0, 50, 200, 50, paint);


            super.onDraw(canvas);

        }

        public void setLeftText(String textString){
            this.textString = textString;
        }

    }