小编Kha*_*rak的帖子

在使用firebase UI时,我无法找到显式活动类com.firebase.ui.auth.KickoffActivity

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FirebaseApp.initializeApp(this);
    setContentView(R.layout.activity_main);
    FirebaseApp.initializeApp(this);
    mAuth=FirebaseAuth.getInstance();
    mAuthListner=new FirebaseAuth.AuthStateListener() {
        @Override
        public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
            FirebaseUser user=firebaseAuth.getCurrentUser();
            if(user!=null){
                Toast.makeText(getApplicationContext(),"Sign in success",Toast.LENGTH_SHORT).show();

            }
            else {
                startActivityForResult(AuthUI.getInstance()
                        .createSignInIntentBuilder()
                        .setIsSmartLockEnabled(false)
                        .setProviders(AuthUI.EMAIL_PROVIDER,AuthUI.GOOGLE_PROVIDER).build(),
                        RC_SIGN_IN);
            }
        }
    };
}

完整的错误消息

android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.flamanco.trackme/com.firebase.ui.auth.KickoffActivity}; have you declared this activity in your AndroidManifest.xml? at android.app.Instrumentation.checkStartActivityResult

添加了app/.gradle文件的依赖项

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.google.firebase:firebase-core:10.0.1'
    compile 'com.google.firebase:firebase-auth:10.0.1'
    compile 'com.firebaseui:firebase-ui-auth:1.1.1'
}

apply plugin: …

我正在尝试将简单数据从 Flask 传递到 javascript 文件我正在关注这个答案 将 JSON 对象从 Flask 传递到 JavaScript

但是我得到了 Uncaught SyntaxError: Unexpected token { in JSON at position 1 at JSON.parse ()

var user = JSON.parse('{{ data | tojson}}');      
 var grade=user.grade;
 console.log(grade);

我的python文件有代码

@app.route("/quiz/0")
def quizFirst():
    data={"grade":"0"}
    return render_template('quiz.html',data=data)

js 文件中的 javascript 无法识别令牌 {，不知道我错过了什么。