android-studio tag

159 questions


1 answers
44 views
0
Did I not set the method? Where should I connect the error code?

public class MainActivity extends AppCompatActivity { Button button1; EditText edittext1;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVie...

2 years ago

1 answers
45 views
0
Bulletin board error using firebase

public class MainActivity extends AppCompatActivity { Button button1; EditText edittext1; EditText edittext2; RecyclerView listview1; @Override protected void onCreate(Bundle savedInstanceState) { su...

2 years ago

1 answers
91 views
0
This is an Android Studio Java code question.

Hello, I'm a beginner who just started studying development.I'm making a random drawing app for practice, and I'm practicing applying the code I studied in Java for the first time. But I'm confused be...


1 answers
37 views
0
Verify Android Current IP Address

Using the socket class, I want to check the ip address that is currently connected regardless of Wi-Fi or LTE. try { Socket mysocket = new Socket(www.google.com, 80); String Addr = mysocket.getL...

2 years ago

2 answers
115 views
0
This is a question related to the production of the Android app.

Hello, brothers. Even if I make an app and release it, you can see itThe purple frame (?) that displays the name of the app file is continuously visible, so the completeness of the app is reduced due ...


1 answers
81 views
0
Forward Android spinner value

String[] items = { less than 4 months, 4 to 6 months, 7 to 12 months, neutralized grave, General grave, Exercise grave, Roh grave, Obese grave};@Overrideprotected void onCreate(Bundle savedInstanceSt...

2 years ago

1 answers
135 views
0
Spinner value forwarding question.

I'm making an application to calculate the amount of cat food. I'm having a hard time with a spinner.Build it, run the emulator, and it's just stored in the spinner as the value of the first arrayAfte...

2 years ago

1 answers
44 views
0
If you run Android, it keeps shutting down android.widget.Button cannot be cast to android.view.ViewGroup

It keeps shutting down... Why is this happening?You can't change the code againㅠ


1 answers
113 views
0
Android will be forced to shut down. NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference

When you run Android and log in, the map screen appears, and it is forced to end immediately after the screen appears. Can anyone tell me what the problem is because I don't know how to watch logcat?0...


1 answers
92 views
0
Android studio is forced to shut down 'java.lang.Stringjava.lang.Object.toString()' on a null object reference

When you press a button on a map map, an error occurs.I used the threadI don't know which part is wrong.I'm just copying what someone else didPlease help me because I am not good at interpreting logca...

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