DrawView.java

package com.example.vidhi.reminderr;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Bitmap.Config;
import android.util.DisplayMetrics;
import android.widget.ImageView;
import android.app.Activity;

/**
 * Created by vidhi on 07-05-2017.
 */

public class DrawView extends ImageView
{
    public Path path=new Path();
    public float preX,preY;
    private int width,height;
    private Paint paint=new Paint();
    public DrawView(Context context)
    {
        super(context);
        paint.setColor(Color.GREEN);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(10);
        paint.setDither(true);
        paint.setAntiAlias(true);
        DisplayMetrics dm=new DisplayMetrics();
        ((Activity)this.getContext()).getWindowManager().getDefaultDisplay().getMetrics(dm);
        width=dm.widthPixels;
        height=dm.heightPixels;
        Paths.reset();
    }
    @Override
    public void onDraw(Canvas canvas)
    {
        Bitmap bm=Bitmap.createBitmap(width,height,Config.ARGB_8888);
        canvas.drawBitmap(bm,0,0,null);
        canvas.drawPath(path,paint);
    }
    public void resetPath()
    {
        path.reset();
    }
}