Android Fire-base身份验证：IllegalArgumentException：给定String为空或为空

Question

我在我的Android应用程序中使用了fire-base身份验证，因此当我按下按钮登录时，文本字段的电子邮件和密码为空，我的应用程序崩溃。我使用了fire-base version 10.0.1，这是我的代码：

        button_login.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
              final String  email_et = mail_login_et.getText().toString();
              final String  password_et = pass_login_et.getText().toString();
        mAuth.signInWithEmailAndPassword(email_et, password_et)
         .addOnCompleteListener(LoginActivity.this, new OnCompleteListener<AuthResult>() {
             @Override
             public void onComplete(@NonNull Task<AuthResult> task) {
                 Log.d("LOGINACT", "signInWithEmail:onComplete:" + task.isSuccessful());
                 if (task.isSuccessful()) {

                     startActivity(new Intent(LoginActivity.this, MainActivity.class));

                 } else {
                     // startActivity(new Intent(LoginActivity.this, MainActivity.class));*
                     Log.w("LOGINACT", "signInWithEmail:failed", task.getException());
                 }
                 }
         });
            }
    });

这是错误日志：

            E/UncaughtException: java.lang.IllegalArgumentException: Given String is empty or null
                     at com.google.android.gms.common.internal.zzac.zzdv(Unknown Source)
                     at com.google.firebase.auth.FirebaseAuth.signInWithEmailAndPassword(Unknown Source)
                     at com.esprit.couverture4g.activities.LoginActivity$1.onClick(LoginActivity.java:83)
                     at android.view.View.performClick(View.java:5198)
                     at android.view.View$PerformClick.run(View.java:21147)
                     at android.os.Handler.handleCallback(Handler.java:739)
                     at android.os.Handler.dispatchMessage(Handler.java:95)
                     at android.os.Looper.loop(Looper.java:148)
                     at android.app.ActivityThread.main(ActivityThread.java:5417)
                     at java.lang.reflect.Method.invoke(Native Method)
                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
         W/art: Suspending all threads took: 25.358ms
         E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.esprit.couverture4g, PID: 3127
              java.lang.IllegalArgumentException: Given String is empty or null
                  at com.google.android.gms.common.internal.zzac.zzdv(Unknown Source)
                  at com.google.firebase.auth.FirebaseAuth.signInWithEmailAndPassword(Unknown Source)
                  at com.esprit.couverture4g.activities.LoginActivity$1.onClick(LoginActivity.java:83)
                  at android.view.View.performClick(View.java:5198)
                  at android.view.View$PerformClick.run(View.java:21147)
                  at android.os.Handler.handleCallback(Handler.java:739)
                  at android.os.Handler.dispatchMessage(Handler.java:95)
                  at android.os.Looper.loop(Looper.java:148)
                  at android.app.ActivityThread.main(ActivityThread.java:5417)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)