public class EditTextExt extends EditText {

 public EditTextExt(Context context, AttributeSet attrs, int defStyle) {   super(context, attrs, defStyle);  }

 public EditTextExt(Context context, AttributeSet attrs) {

  super(context, attrs);  }

 public EditTextExt(Context context) {

  super(context);  }

 @Override

 protected void onDraw(Canvas canvas) {   super.onDraw(canvas);   Paint p = new Paint();  p.setTextSize(25);  p.setColor(Color.GRAY);  canvas.drawText("输入提示文本", 2, getHeight() / 2 + 5, p);  }

}

xml布局文件

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=""     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >

    <Button

        android:id="@+id/btn"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="点击截屏" />

    <com.a.at.EditTextExt

        android:layout_width="match_parent"         android:layout_height="wrap_content"         android:paddingLeft="100dp" />

</LinearLayout>