Good afternoon, I have an error that arose after having edited a function to save data by DialogFragment, in logCat it presents the error that my ListView is null, but I can not get the null of the class because it will not recognize :
follows LogCat below:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.allsport.miyonic.allsport, PID: 2933
java.lang.RuntimeException: Unable to resume activity {com.allsport.miyonic.allsport/com.allsport.miyonic.allsport.ResultSimples}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3103)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2481)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
at com.allsport.miyonic.allsport.ResultSimples.onResume(ResultSimples.java:51)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1258)
at android.app.Activity.performResume(Activity.java:6312)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3092)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2481)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Activity result java code:
package com.allsport.miyonic.allsport;
import android.content.pm.ActivityInfo;
import android.os.PersistableBundle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import java.util.List;
import Base.DbHelper;
import Base.Esporte;
import static android.os.FileObserver.DELETE;
public class ResultSimples extends AppCompatActivity {
private ListView lista;
@Override
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
setContentView(R.layout.activity_result_simples);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
lista = (ListView) findViewById(R.id.ListaTimes);
/*apagar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DbHelper dd = new DbHelper(ResultSimples.this);
dd.delete(); // É necessário passar o parâmetro
}
});*/
}
@Override
public void onResume(){
super.onResume();
DbHelper dbhe = new DbHelper(this);
List<Esporte> listaResultPartida = dbhe.selectTodosResult();
ArrayAdapter<Esporte> adp = new ArrayAdapter<Esporte>(this, R.layout.resultado_modificado, android.R.id.text1, listaResultPartida);
lista.setAdapter(adp);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.resultado_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.deletar) {
}
return super.onOptionsItemSelected(item);
}
}
DialogFragment Code:
package com.allsport.miyonic.allsport;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import Base.Esporte;
public class DialogGol extends DialogFragment{
private EditText caixa;
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState){
View vi = LayoutInflater.from(getContext()).inflate(R.layout.caixa_jogador_dialog, null);
caixa = (EditText) vi.findViewById(R.id.caixa_dialog_1);
AlertDialog.Builder bir = new AlertDialog.Builder(getActivity());
bir.setMessage("Gol de ").setPositiveButton("Confirmar", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Esporte inseri = new Esporte();
inseri.setjogadores(caixa.getText().toString());
}
}).setNegativeButton("Cancelar", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//nulo
}
});
bir.setTitle("Gooolll!!!");
View view = LayoutInflater.from(getContext()).inflate(R.layout.caixa_jogador_dialog, null);
bir.setView(view);
AlertDialog dialog = bir.create();
return dialog;
}
}
XML Activity Result:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.allsport.miyonic.allsport.ResultSimples"
android:background="#003366">
<TextView
android:text="Resultado das Partidas"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:id="@+id/textView"
android:textColor="#fff"
android:textStyle="normal|italic"
android:textAlignment="center"
android:textSize="29dp" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginBottom="15px">
</LinearLayout>
<ListView
android:layout_width="match_parent"
android:id="@+id/ListaTimes"
android:textColor="@color/corList"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="150px"
android:layout_height="match_parent" />
</RelativeLayout>
Thank you ...