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création d'une application


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Bonjour,
je doit faire une application pour mon club afin de gérer les consommations de boissons sur une tablette. Je débute sur android.
Il faudrait indiquer la date (si possible afficher un calendrier en cliquant dessus)
cliquer sur le nom de la personne
cliquer sur un champ quantité consommée
et un champ quantité payée
avoir un bouton qui lorsque l'on clique dessus, les résultats s'enregistre dans un fichier
Voici le code que j'ai déjà réaliser :
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context="com.conso.MainActivity"
android:weightSum="1">

<TextView

android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="32dp"
android:gravity="center"
android:text="Date : "
android:textColor="#FF0000"
android:textStyle="bold"
tools:ignore="HardcodedText,MissingConstraints,NestedWeights"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />

<EditText

android:id="@+id/date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="date"
android:inputType="datetime"
tools:ignore="HardcodedText,MissingConstraints"
tools:layout_editor_absoluteX="67dp"
tools:layout_editor_absoluteY="-5dp" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="horizontal"
android:weightSum="1"
tools:ignore="InefficientWeight,MissingConstraints"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="24dp">
<TextView

android:layout_width="252dp"
android:layout_height="32dp"
android:gravity="center"
android:text="Joueur : "
android:textColor="#FF0000"
android:textStyle="bold"
tools:ignore="HardcodedText,MissingConstraints,NestedWeights"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />

<Spinner
android:id="@+id/joueur"
android:layout_width="fill_parent"
android:layout_height="39dp"
android:hint="@string/joueur" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="horizontal"
android:weightSum="1"
tools:ignore="InefficientWeight,MissingConstraints"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="24dp">
<TextView

android:layout_width="252dp"
android:layout_height="32dp"
android:gravity="center"
android:text="Quantité dûe: "
android:textColor="#FF0000"
android:textStyle="bold"
tools:ignore="HardcodedText,MissingConstraints,NestedWeights"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />

<Spinner
android:id="@+id/qtedue"
android:layout_width="match_parent"
android:layout_height="39dp"
android:hint="@string/qtedue"/>
</LinearLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="horizontal"
android:weightSum="1"
tools:ignore="InefficientWeight,MissingConstraints"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="24dp">
<TextView

android:layout_width="252dp"
android:layout_height="32dp"
android:gravity="center"
android:text="Quantité payée : "
android:textColor="#FF0000"
android:textStyle="bold"
tools:ignore="HardcodedText,MissingConstraints,NestedWeights"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />

<Spinner
android:id="@+id/qtepayee"
android:layout_width="match_parent"
android:layout_height="39dp"
android:hint="@string/qtepayee" />
</LinearLayout>
<!--<Button
android:id="@+id/Valider"
android:layout_width="fill_parent"
android:layout_height="36dp"
android:text="@string/valider" />

<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="0.81">-->

<TextView
android:id="@+id/information"
android:layout_width="105dp"
android:layout_height="31dp"
android:layout_gravity="center"
android:layout_marginTop="12dp"
android:text="@string/en_attente" />
<!--</RelativeLayout>-->


</LinearLayout>

et MainActivity.java

package com.conso;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;

import static android.R.layout.simple_spinner_item;

public class MainActivity extends AppCompatActivity {

private Button active;
private Spinner list = null;
private Spinner list1 = null;
private Spinner list2;
private TextView text;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

final Spinner list = (Spinner) findViewById(R.id.joueur);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, simple_spinner_item, JR);

adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

list.setAdapter(adapter);
list.setSelection(0);

final Spinner list1 = (Spinner) findViewById(R.id.qtedue);
ArrayAdapter<String> adapter1;
adapter1 = new ArrayAdapter<String>(this, simple_spinner_item, DD);

adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

list1.setAdapter(adapter1);

/*final Spinner list2 = (Spinner) findViewById(R.id.qtepayee);
ArrayAdapter<String> adapter2;
adapter2 = new ArrayAdapter<String>(this, simple_spinner_item, DP);

adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

list.setAdapter(adapter2);*/


/*final Button active = (Button) findViewById(R.id.valider);
active.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
Option();
}
});*/

}

static final String[] JR = new String[]{"alphonse","didier","rené"
};

static final String[] DD = new String[]{"1","2","3","4","5"
};

/*static final String[] DP = new String[]{"1","2","3","4","5"
};*/

/*private void Option() {
Button active = (Button) findViewById(R.id.valider);
if (active != null) {
Spinner list = (Spinner) findViewById(R.id.joueur);
TextView text = (TextView) findViewById(R.id.information);
if ((list != null) || list.isEnabled()) {
list.setEnabled(true);
active.setText("Valider");
text.setText("En attente");
} else {
switch (list.getSelectedItemPosition()) {
case 0:
text.setText("Android");
break;
case 1:
text.setText("BlackBerry");
break;
case 2:
text.setText("Firefox");
break;
case 3:
text.setText("iOS");
break;
case 4:
text.setText("Ubuntu");
break;
case 5:
text.setText("Windows");
break;
}
list.setEnabled(false);
active.setText(R.string.OK);


}
}

}*/
}

Mes problèmes sont les suivants:
si j'active les 3 listes, lorsque je lance l'émulateur, la deuxième liste s'affiche dans la première et la 3ème dans la deuxième et il n'y a rien dans la 3ème.
si j'active le bouton, l'application plante

Quelqu'un pourrait-il m'aider svp?

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