E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.venicehost.jaziresakhtafzar, PID: 10782
    java.lang.IllegalStateException: Could not execute method for android:onClick
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:402)
        at android.view.View.performClick(View.java:7346)
        at android.widget.TextView.performClick(TextView.java:14221)
        at android.view.View.performClickInternal(View.java:7312)
        at android.view.View.access$3200(View.java:846)
        at android.view.View$PerformClick.run(View.java:27794)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7099)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397)
        at android.view.View.performClick(View.java:7346)
        at android.widget.TextView.performClick(TextView.java:14221)
        at android.view.View.performClickInternal(View.java:7312)
        at android.view.View.access$3200(View.java:846)
        at android.view.View$PerformClick.run(View.java:27794)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7099)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean com.venicehost.jaziresakhtafzar.Socket.send(java.lang.String)' on a null object reference
        at com.venicehost.jaziresakhtafzar.Singleton.send(Singleton.java:23)
        at com.venicehost.jaziresakhtafzar.LoginActivity.doLogin(LoginActivity.java:114)
        at java.lang.reflect.Method.invoke(Native Method)
        at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397)
        at android.view.View.performClick(View.java:7346)
        at android.widget.TextView.performClick(TextView.java:14221)
        at android.view.View.performClickInternal(View.java:7312)
        at android.view.View.access$3200(View.java:846)
        at android.view.View$PerformClick.run(View.java:27794)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7099)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)