获得手机的全部权限

private void per() {
        StringBuffer appNameAndPermissions = new StringBuffer();
        PackageManager pm = getPackageManager();
        List<ApplicationInfo> packages = pm
                .getInstalledApplications(PackageManager.GET_META_DATA);
        for (ApplicationInfo applicationInfo : packages) {
            try {
                PackageInfo packageInfo = pm.getPackageInfo(
                        applicationInfo.packageName,
                        PackageManager.GET_PERMISSIONS);
                appNameAndPermissions.append(packageInfo.packageName + "*:
");
                // Get Permissions
                String[] requestedPermissions = packageInfo.requestedPermissions;
                if (requestedPermissions != null && requestedPermissions.toString().contains("haodf")) {
                    for (int i = 0; i < requestedPermissions.length; i++) {
                        Log.d("test", requestedPermissions[i]);
                        appNameAndPermissions.append(requestedPermissions[i]
                                + "
");
                    }
                    appNameAndPermissions.append("
");
                }
            } catch (NameNotFoundException e) {
                e.printStackTrace();
            }
        }
    }