关于程序实现修改开机Logo

做车机的朋友可能知道，一个项目可能会遇到这种需求：根据客户的车品牌设置开机Logo，比如说大众的车就选择大众的开机Logo图片，凯迪拉克的车就选择凯迪拉克的开机Logo图片，十分方便灵活可以适用所有车品牌，车主可以自己选择自己喜欢的开机Logo，一旦选择之后，重启时开机Logo就变成你之前选择的开机Logo，这并不是简单的替换系统代码misc/目录下的 boot_logo.bmp.gz文件那么简单；这种实现需要底层脚本文件来支持，流程是：将所有可能用到的开机Logo图片放到自己创建的apk中，通过打开这个apk的界面用ListView或者GridView去显示Logo图片，然后点击谁设置谁，点击之后通过代码把图片暂放到内部sdcard/根目录（这部分代码后面会贴出来，先把流程说完），然后调用chlogo.sh脚本服务去设置boot_logo.gz文件到misc分区，要确保chlogo.sh服务被启动调用，可到android\device\actions\s700_cb6\目录下的init.modules.rc文件中去添加如下代码即可：目录请以自己的系统代码目录为准！
service chlogo /system/bin/chlogo.sh
user root
    disabled

    oneshot

chlogo.sh脚本文件的内容如下：

#!/system/bin/sh
mount -o rw,remount /dev/block/MISC
#mkdir /storage/sdcard/bootlogo
#cp /storage/sdcard/boot_logo.bmp /storage/sdcard/bootlogo/boot_logo.bmp
gzip -9 /storage/sdcard/boot_logo.bmp
mv /storage/sdcard/boot_logo.bmp.gz /misc/boot_logo.bmp.gz
mount -o ro,remount /dev/block/MISC

点击列表中图片把图片暂放到内部sdcard/根目录的代码如下：

private void setBootLogo(int resId) {
		
		mBitLogo = ((BitmapDrawable) getResources().getDrawable(resId)).getBitmap();
		
		if(mBitLogo != null) {
			
			saveLogoPic(mBitLogo);
			SystemProperties.set("ctl.start", "chlogo");// �������ýű�chlogo
			//�ȴ�ű����
			int nCount = 0;
			final int nMaxCount = 60;
while("running".equalsIgnoreCase(SystemProperties.get("init.svc.chlogo","stopped")) 
					&& nCount < nMaxCount ){
				nCount++;
				SystemClock.sleep(50);
				String tmp2 =SystemProperties.get("init.svc.chlogo","stopped");
				
			}
			if (nCount> 0);
			buffer[3] = (byte) (size >> 8);
			buffer[4] = (byte) (size >> 16);
			buffer[5] = (byte) (size >> 24);
buffer[6] = 0x00;
			buffer[7] = 0x00;
			buffer[8] = 0x00;
			buffer[9] = 0x00;
			buffer[10] = 0x36;
			buffer[11] = 0x00;
			buffer[12] = 0x00;
			buffer[13] = 0x00;
			return buffer;
		}


private byte[] addBMP_RGB_888(int[] b, int w, int h) {
			int len = b.length;
			System.out.println(b.length);
			byte[] buffer = new byte[w * h * 3];
			int offset = 0;
			for (int i = len - 1; i >= w; i -= w) {
				// DIB�ļ���ʽ���һ��Ϊ��һ�У�ÿ�а�������˳��
				int end = i, start = i - w + 1;
for (int j = start; j <= end; j++) {
					buffer[offset] = (byte) (b[j] >> 0);
					buffer[offset + 1] = (byte) (b[j] >> 8);
					buffer[offset + 2] = (byte) (b[j] >> 16);
					offset += 3;
				}
			}
			return buffer;
		}

private static byte[] addBMPImageInfosHeader(int w, int h) {
			byte[] buffer = new byte[40];
			// ����ǹ̶��� BMP ��ϢͷҪ40���ֽ�
			buffer[0] = 0x28;
			buffer[1] = 0x00;
			buffer[2] = 0x00;
			buffer[3] = 0x00;
			// ��� ��λ�������ǰ��λ�� ��λ������ź��λ��
			buffer[4] = (byte) (w >> 0);
			buffer[5] = (byte) (w >> 8);
			buffer[6] = (byte) (w >> 16);
			buffer[7] = (byte) (w >> 24);
// ���� ͬ��
			buffer[8] = (byte) (h >> 0);
			buffer[9] = (byte) (h >> 8);
			buffer[10] = (byte) (h >> 16);
			buffer[11] = (byte) (h >> 24);
			// ���DZ�����Ϊ1
			buffer[12] = 0x01;
			buffer[13] = 0x00;
			// ������ ���� 32λ����һ������ �����ͬ�ķ�ʽ(ARGB 32λ RGB24λ��ͬ��!!!!)
			buffer[14] = 0x18;
			buffer[15] = 0x00;
			// 0-��ѹ�� 1-8bitλͼ
			// 2-4bitλͼ 3-16/32λͼ
			// 4 jpeg 5 png
buffer[16] = 0x00;
			buffer[17] = 0x00;
			buffer[18] = 0x00;
			buffer[19] = 0x00;
			// ˵��ͼ���С
			buffer[20] = 0x00;
			buffer[21] = 0x00;
			buffer[22] = 0x00;
			buffer[23] = 0x00;
			// ˮƽ�ֱ���
			buffer[24] = (byte) 0xc3;
			buffer[25] = 0x0e;
			buffer[26] = 0x00;
			buffer[27] = 0x00;
// ��ֱ�ֱ���
			buffer[28] = (byte) 0xc3;
			buffer[29] = 0x0e;
			buffer[30] = 0x00;
			buffer[31] = 0x00;
			// 0 ʹ�����еĵ�ɫ����
			buffer[32] = 0x00;
			buffer[33] = 0x00;
			buffer[34] = 0x00;
			buffer[35] = 0x00;
// ������ɫ����
			buffer[36] = 0x00;
			buffer[37] = 0x00;
			buffer[38] = 0x00;
			buffer[39] = 0x00;
			return buffer;
		}