关于程序实现修改开机Logo

阳光穿透心脏的1/2处 2022-05-26 07:14 253阅读 0赞

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<nMaxCount) {
    				Toast.makeText(mContext, R.string.alert_set_success, Toast.LENGTH_LONG).show();
    				mContext.finish();
    			}
    else {
    				Toast.makeText(mContext, R.string.alert_set_fail, Toast.LENGTH_LONG).show();	
    			}
    			
    		}else {
    			
    			
    		}
    		
    	}
    
    
    public void saveLogoPic(Bitmap bitmap) {
    
    		if (bitmap != null) {
    			int w = bitmap.getWidth(), h = bitmap.getHeight();	
    			int[] pixels = new int[w * h];
    			bitmap.getPixels(pixels, 0, w, 0, 0, w, h);
    
    			byte[] rgb = addBMP_RGB_888(pixels, w, h);
    			byte[] header = addBMPImageHeader(rgb.length);
    			byte[] infos = addBMPImageInfosHeader(w, h);
    byte[] buffer = new byte[54 + rgb.length];
    			System.arraycopy(header, 0, buffer, 0, header.length);
    			System.arraycopy(infos, 0, buffer, 14, infos.length);
    			System.arraycopy(rgb, 0, buffer, 54, rgb.length);
    
    			File f = new File(LOGO_ROOT_PATH + LogoPicName_bmp);
    			if (f.exists()) {
    				f.delete();
    			}
    try {
    				FileOutputStream fos = new FileOutputStream(f);
    				fos.write(buffer);
    			} catch (FileNotFoundException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    			} catch (IOException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    			}
    		}
    		//util.runtimeCommand("gzip -9 " + LOGO_ROOT_PATH + LogoPicName);
    		//savePNG();//����png add by 66126
    		
    	}
    
    private static byte[] addBMPImageHeader(int size) {
    			byte[] buffer = new byte[14];
    			// magic number 'BM'
    			buffer[0] = 0x42;
    			buffer[1] = 0x4D;
    			// ��¼��С
    			buffer[2] = (byte) (size >> 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;
    		}