PrintPicture.java

package printer;

import android.graphics.Bitmap;

public class PrintPicture {

    /**
     * 打印位图函数
     * 此函数是将一行作为一个图片打印，这样处理不容易出错
     * @param mBitmap
     * @param nWidth
     * @param nMode
     * @return
     */
    public static byte[] POS_PrintBMP(Bitmap mBitmap, int nWidth, int nMode) {
        // 先转黑白，再调用函数缩放位图
        int width = ((nWidth + 7) / 8) * 8;
        int height = mBitmap.getHeight() * width / mBitmap.getWidth();
        height = ((height + 7) / 8) * 8;

        Bitmap rszBitmap = mBitmap;
        if (mBitmap.getWidth() != width){
            rszBitmap = Other.resizeImage(mBitmap, width, height);
        }

        Bitmap grayBitmap = Other.toGrayscale(rszBitmap);

        byte[] dithered = Other.thresholdToBWPic(grayBitmap);

        byte[] data = Other.eachLinePixToCmd(dithered, width, nMode);

        return data;
    }

    /**
     * 使用下传位图打印图片
     * 先收完再打印
     * @param bmp
     * @return
     */
    public static byte[] Print_1D2A(Bitmap bmp){

			/*
			 * 使用下传位图打印图片
			 * 先收完再打印
			 */
        int width = bmp.getWidth();
        int height = bmp.getHeight();
        byte data[]=new byte[1024*10];
        data[0] = 0x1D;
        data[1] = 0x2A;
        data[2] =(byte)( (width - 1)/ 8 + 1);
        data[3] =(byte)( (height - 1)/ 8 + 1);
        byte k = 0;
        int position = 4;
        int i;
        int j;
        byte temp = 0;
        for(i = 0; i <width;  i++){

            System.out.println("进来了...I");
            for(j = 0; j < height; j++){
                System.out.println("进来了...J");
                if(bmp.getPixel(i, j) != -1){
                    temp |= (0x80 >> k);
                } // end if
                k++;
                if(k == 8){
                    data[position++] = temp;
                    temp = 0;
                    k = 0;
                } // end if k
            }// end for j
            if(k % 8 != 0){
                data[position ++] = temp;
                temp = 0;
                k = 0;
            }

        }
        System.out.println("data"+data);

        if( width% 8 != 0){
            i =   height/ 8;
            if(height % 8 != 0) i++;
            j = 8 - (width % 8);
            for(k = 0; k < i*j; k++){
                data[position++] = 0;
            }
        }
        return data;
    }

}