Android 如何在没有这个Lint错误的情况下通过静态工厂方法传递上下文？

我正在尝试为

GoogleSignIn

创建一个静态类，以便可以在多个片段中重用它。由于

GoogleSignIn

方法需要一个上下文，因此我将其传递给构造函数。 但是，它会抛出此

lint

错误。我应该关心通过这个构造函数传递上下文吗

---

Singleton类的意思是将一个类作为Singleton

由于只有一个

AuthStateManager

实例，并且所有变量都是

private

，因此可以从变量中删除

static

更新

public class AuthStateManager {

    private static final String TAG = "AuthStateManager";

    private static AuthStateManager authStateManager;
    private GoogleSignInClient googleSignInClient;
    private GoogleSignInAccount googleSignInAccount;
    private GoogleSignInOptions googleSignInOptions;

    private AuthStateManager() {
        googleSignInOptions = new GoogleSignInOptions
                .Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(context.getString(R.string.idclient))
                .requestEmail()
                .build();

        googleSignInClient = GoogleSignIn.getClient(context, googleSignInOptions);
        googleSignInAccount = GoogleSignIn.getLastSignedInAccount(context);
    }

    public static AuthStateManager getInstance(Context context) {
        if(authStateManager == null){
            authStateManager = new AuthStateManager();
        }

        return authStateManager;
    }


    public String getIdToken() {
        if (googleSignInAccount != null) {
            return googleSignInAccount.getIdToken();
        }
        return null;
    }

    public boolean isUserSignedIn() {
        if (googleSignInAccount != null) {
            return true;
        }
        return false;
    }

---

除了

标记

，为什么这些字段的其余部分是静态的？它们似乎不需要是静态的。如果我将其设置为非静态，我将无法在片段中访问它，如果我将AuthStateManager工厂方法设置为静态，那么我将不得不将该类的变量设置为静态，这将导致

lint

错误@DIRTYDAVE，我错了，只有

AuthStateManager

应该是静止的static@DIRTYDAVE我已经更新了我的答案，我没有想到将

googlesign

方法放在私有构造函数中。我还在私有构造函数中添加了上下文。这里是最后一段不会抛出任何错误的代码：谢谢你的帮助。我为此挣扎了一段时间。

public class AuthStateManager {

    private static final String TAG = "AuthStateManager";

    private static AuthStateManager authStateManager;
    private GoogleSignInClient googleSignInClient;
    private GoogleSignInAccount googleSignInAccount;
    private GoogleSignInOptions googleSignInOptions;

    private AuthStateManager() {
        googleSignInOptions = new GoogleSignInOptions
                .Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestIdToken(context.getString(R.string.idclient))
                .requestEmail()
                .build();

        googleSignInClient = GoogleSignIn.getClient(context, googleSignInOptions);
        googleSignInAccount = GoogleSignIn.getLastSignedInAccount(context);
    }

    public static AuthStateManager getInstance(Context context) {
        if(authStateManager == null){
            authStateManager = new AuthStateManager();
        }

        return authStateManager;
    }


    public String getIdToken() {
        if (googleSignInAccount != null) {
            return googleSignInAccount.getIdToken();
        }
        return null;
    }

    public boolean isUserSignedIn() {
        if (googleSignInAccount != null) {
            return true;
        }
        return false;
    }