How to change TextView in fragment in on create or when a button is called - onclick

Question

Almost 10 hours am I searching for an answer. Why my app crashes when i launch it.
What I realy want is a function that when I click OK on Edittext, text will be written on Text view. But first just hat to set text in on create in class that extence fragment.
package youtube.demo.youtubedemo.Fragments.Calculator_list;
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import youtube.demo.youtubedemo.R;
public class Calculator_list extends Fragment {
View view;
FragmentManager fragmentManager;
public Calculator_list() {
}
TextView Damage1pise;
EditText Damage1beri;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_calculator_list, container, false);
Damage1beri = (EditText) view.findViewById(R.id.Game1_read_dmg_list_Player1);
Damage1pise = (TextView)view.findViewById(R.id.Game1_writen_dmg_list_Player1);
Damage1pise.setText("123");
return view;
}
public TextView Returnelement ()
{
return Damage1pise;
}
#Override
public void onCreate(Bundle savedInstanceState) {
Damage1pise = (TextView)getView().findViewById(R.id.Game1_writen_dmg_list_Player1);
Damage1pise.setText("1234");
super.onCreate(savedInstanceState);
}
}
What I realy want is a funcction that when I click OK on Edittext, text will be written on Text view
public void OnButton1click(View v)
{
Damage1.settext(v.text)
// This is hard coded, First I want to set text on create then go on whit the code
}
Here are the errors.
E/AndroidRuntime: FATAL EXCEPTION: main
Process: youtube.demo.youtubedemo, PID: 2736
java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
at youtube.demo.youtubedemo.Fragments.Calculator_list.Calculator_list.onCreate(Calculator_list.java:47)
at android.app.Fragment.performCreate(Fragment.java:2335)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:949)
at android.app.BackStackRecord.setLastIn(BackStackRecord.java:857)
at android.app.BackStackRecord.calculateFragments(BackStackRecord.java:897)
at android.app.BackStackRecord.run(BackStackRecord.java:727)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1578)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:483)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Answer 1

On this line of your showed code, both methods, certify yourself you have a blank space between (TextView) and the end of the sentence, like below:
Damage1pise = (TextView) getView().findViewById(R.id.Game1_writen_dmg_list_Player1);
Also, certify yourself you have a textview on your invoked layout file xml with name Game1_writen_dmg_list_Player1, because the error is been raised by a null reference, i.e.: you're invoking a not found element (maybe written with two ts?).