I hope it will inspire you guy to program much better application, and enjoy it, just we togother make progress.

/**the view width as 9 weights*/
private static final int WIDTH_TOTAL_WEIGHTS = 9;
/**the view height as 9 weights*/
private static final int HEIGHT_TOTAL_WEIGHTS = 9;


//The peak point, all of numbers are weight, such as (4/total_width_weight)*width, (0/total_height_weight)*height
//(8,7) to (6,0)

//need to draw line by other software

//draw the wave peak when the valid heartrate is gotten.
//LLL 0  1 2 3 4 5 6 7 8 9
//0                    (7,0)[2]
//1				  				
//2							
//3								
//4							
//5							
//6			   				
//7	  (0, 6)[5]	 (4,6)[4]	
//8	
//9				          (8,6)[1]  	 
//10				(5,9)[3]
			

//here you can change the weight to make difference shape of wave
private static final int[][] m_WavePeak_Weight = new int[][]{
        new int[]{4, 0, 6, 6},
        new int[]{5, 4, HEIGHT_TOTAL_WEIGHTS, 6},
        new int[]{7, 5, 0, HEIGHT_TOTAL_WEIGHTS},
        new int[]{WIDTH_TOTAL_WEIGHTS, 7, 6, 0}
};

//draw the line when the heartrate is not gotten.

//LLL 0  1 2 3 4 5 6 7 8 9
//0                       
//1				  				
//2			
//3			
//4			
//5			
//6			   
//7	 (0, 6)[2]<<<<<<<<<<<<(8, 6)[1]	
//8	
//9				          	 
//10				
private static final int[] m_WaveLine_Weight = new int[]{WIDTH_TOTAL_WEIGHTS, 0, 6, 6};