Android截屏（fb0）

来源：互联网发布：sql随机生成6位数字编辑：程序博客网时间：2024/05/22 06:58

1.申请获取root权限，这一步很重要，不然会没有作用

private void getPermession() {    try {        Process process = Runtime.getRuntime().exec("su");        // 获取输出流        OutputStream outputStream = process.getOutputStream();        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);        String cmd = "su \nchmod 777 /dev/graphics/fb0 \n";        dataOutputStream.writeBytes(cmd);        dataOutputStream.flush();        dataOutputStream.close();        outputStream.close();    } catch (IOException e) {        e.printStackTrace();    }}

2.手机分辨率

private void getPhoneProfile() {    DisplayMetrics dm = new DisplayMetrics();    Display display = this.getWindowManager().getDefaultDisplay();    display.getMetrics(dm);    screenWidth = dm.widthPixels; // 屏幕宽（像素，如：480px）    screenHeight = dm.heightPixels; // 屏幕高（像素，如：800p）    int pixelformat = display.getPixelFormat();    PixelFormat localPixelFormat1 = new PixelFormat();    PixelFormat.getPixelFormatInfo(pixelformat, localPixelFormat1);    deepth = localPixelFormat1.bytesPerPixel;// 位深    Log.e(TAG, "getFB0: "+ deepth);    piex = new byte[screenHeight * screenWidth*deepth] ;// 像素    colors = new int[screenHeight * screenWidth];}

3.读取文件内容

private Bitmap getFB0() {    Bitmap bitmap = null;    try {        FileInputStream buf = null;        fbFile = new File(FB0FILE1);        buf = new FileInputStream(fbFile);// 读取文件内容        dStream=new DataInputStream(buf);        dStream.readFully(piex);        dStream.close();        // 将rgb转为色值,解析fb0        for (int m = 0; m < colors.length; m++) {            int b = (piex[m * 4] & 0xFF);            int g = (piex[m * 4 + 1] & 0xFF);            int r = (piex[m * 4 + 2] & 0xFF);            int a = (piex[m * 4 + 3] & 0xFF);            colors[m] = (a << 24) + (r << 16) + (g << 8) + b;            if (m < 10) {                Log.e(TAG, "getFB0: " + piex[m * 4]);                Log.e(TAG, "getFB0: " + piex[m * 4+ 1]);                Log.e(TAG, "getFB0: " + piex[m * 4+ 2]);                Log.e(TAG, "getFB0: " + piex[m * 4+ 3]);                Log.e(TAG, "getFB0: " + b);                Log.e(TAG, "getFB0: " + g);                Log.e(TAG, "getFB0: " + r);                Log.e(TAG, "getFB0: " + a);            }        }        // 得到屏幕bitmap        bitmap = Bitmap.createBitmap(colors, screenWidth, screenHeight,                Bitmap.Config.RGB_565);    } catch (IOException e) {        e.printStackTrace();    }    return bitmap;}

4.保存截图

public static void savePic(Bitmap b,String strFileName){    FileOutputStream fos = null;    try {        fos = new FileOutputStream(strFileName);        if (null != fos)        {            b.compress(Bitmap.CompressFormat.PNG, 50, fos);            fos.flush();            fos.close();        }    } catch (FileNotFoundException e) {    } catch (IOException e) {    }}

遗留问题
fdb0解析成bitmap不满足需求，需要对手机的系统配置分析之后对应解析fdb0

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