Is it possible to show pagelines in a EditText
?
I mean these lines:
@gideon's answer above works well but has an issue when you enter more text in the edittext
because more lines are not drawn accordingly. To solve this, I wrote an override for onMeasure()
and called invalidate()
. and more lines will be drawn when text increases.
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec,heightMeasureSpec);
invalidate();
}
The code now is:
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.EditText;
public class LinedEditText extends EditText
{
private Rect mRect;
private Paint mPaint;
public LinedEditText(Context context, AttributeSet attrs)
{
super(context, attrs);
mRect = new Rect();
mPaint = new Paint();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setColor(0xFF000000);
}
/**
* This is called to draw the LinedEditText object
* @param canvas The canvas on which the background is drawn.
*/
@Override
protected void onDraw(Canvas canvas)
{
int height = canvas.getHeight();
int curHeight = 0;
Rect r = mRect;
Paint paint = mPaint;
int baseline = getLineBounds(0, r);
for (curHeight = baseline + 1; curHeight < height;
curHeight += getLineHeight())
{
canvas.drawLine(r.left, curHeight, r.right, curHeight, paint);
}
super.onDraw(canvas);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec,heightMeasureSpec);
invalidate();
}
}