private final Context mContext;
public PermissionsCheckerUtil(Context mContext) {
 this.mContext = mContext;
}

 // 判斷權限集合
public boolean lacksPermissions(String... permissions) {
 for (String permission : permissions) {
  if (lacksPermission(permission)) {
   return true;
  }
 }
 return false;
}

 // 判斷是否缺少權限
private boolean lacksPermission(String permission) {
return ContextCompat.checkSelfPermission(mContext, permission) ==
PackageManager.PERMISSION_DENIED;
}

//添加你所需權限進集合
private static final String[] PERMISSIONS = new String[]{
Manifest.permission.BLUETOOTH,
Manifest.permission.BLUETOOTH_ADMIN,
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION
};
public Context mContext;
public static final int PERMISSION_REQUEST_CODE = 10001;
private PermissionsCheckerUtil mPermissionsCheckerUtil; //權限檢測器

mContext = getApplicationContext();
mPermissionsCheckerUtil = new PermissionsCheckerUtil(mContext);
initPermission();

 private void initPermission() {
 if (mPermissionsCheckerUtil.lacksPermissions(PERMISSIONS)) {
  ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_REQUEST_CODE);
 }
}