android5.1里面的user-app的默认权限设置

在 rameworks/base/services/core/java/com/android/server/AppOpsPolicy.java中：
public boolean isControlAllowed(int code, String packageName) {
      boolean isShow = true;
      int show = CONTROL_UNKNOWN;
      PolicyPkg pkg;
      String key;
      String type;

      if (mPolicy == null) {
         return isShow;
      }

      type = getAppType(packageName);
      if (type != null) {
         key = type;
         pkg = mPolicy.get(key);
         if (pkg != null && pkg.show != CONTROL_UNKNOWN) {
            show = pkg.show;
         }
      }
      key = packageName;
      if (type != null) {
         key = key + "." + type;
      }
      pkg = mPolicy.get(key);
      if (pkg != null) {
         if (pkg.show != CONTROL_UNKNOWN) {
            show = pkg.show;
         }
         PolicyOp op = pkg.get(code);
         if (op != null) {
            if (op.show != CONTROL_UNKNOWN) {
                  show = op.show;
            }
         }
      }else {
         if(code == AppOpsManager.OP_CAMERA)
         {
            show = CONTROL_NOSHOW;
         }
      }
      if (show == CONTROL_NOSHOW) {
         isShow = false;
      }
      return isShow;
}
public int getDefualtMode(int code, String packageName) {
      int mode = AppOpsManager.MODE_ERRORED;
      PolicyPkg pkg;
      String key;
      String type;

      if (mPolicy == null) {
         return mode;
      }
      if (DEBUG)
         Slog.d(TAG, "Default mode requested for op=" + code + " package="
                  + packageName);
      type = getAppType(packageName);
      if (type != null) {
         // Get value based on 'type'
         key = type;
         pkg = mPolicy.get(key);
         if (pkg != null && pkg.mode != AppOpsManager.MODE_ERRORED) {
            if (DEBUG)
                  Slog.d(TAG, "Setting value based on type: " + pkg);
            mode = pkg.mode;
         }
      }
      // Get value based on 'pkg'.
      key = packageName;
      if (type != null) {
         key = key + "." + type;
      }
      pkg = mPolicy.get(key);
      if (pkg != null) {
         if (pkg.mode != AppOpsManager.MODE_ERRORED) {
            if (DEBUG)
                  Slog.d(TAG, "Setting value based on packageName: " + pkg);
            mode = pkg.mode;
         }
         // Get value base on 'op'
         PolicyOp op = pkg.get(code);
         if (op != null) {
            if (op.mode != AppOpsManager.MODE_ERRORED) {
                  if (DEBUG)
                     Slog.d(TAG, "Setting value based on op: " + op);
                  mode = op.mode;
            }
         }
      }else {
         if(code == AppOpsManager.OP_CAMERA)
         {
            mode = AppOpsManager.MODE_ALLOWED;
         }
      }
      if (DEBUG)

      Slog.d(TAG, "Returning mode=" + mode);
      return mode;
}

可以设置所有的用户APP默认打开摄像头的权限。

如果是要设置为允许某个用户APP默认打开摄像头权限，请打开/device/qcom/common/appops/appops_policy.xml，