Android 带下划线的EditText

带下划线的EditText

/**
 * ==============================================
 * author : carl
 * e-mail : 991579741@qq.com
 * time   : 2018/12/31
 * desc   : 带下划线的EditText
 * version: 1.0
 * ==============================================
 */
public class UnderLineEditText extends EditText {
    private Paint paint;

    public UnderLineEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        //设置画笔的属性
        paint = new Paint();
        paint.setStyle(Paint.Style.STROKE);
        //设置画笔颜色为红色
        paint.setColor(Color.parseColor("#CCFF98"));
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        /**canvas画直线，从左下角到右下角，this.getHeight()-2是获得父edittext的高度，但是必须要-2这样才能保证
         * 画的横线在edittext上面，和原来的下划线的重合
         */
        canvas.drawLine(0, this.getHeight() - 2, this.getWidth() - 2, this.getHeight() - 2, paint);
    }
}