Discussion :

[oussama7373]

Mon fichier java

Code :

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import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
 
public class MainActivity extends AppCompatActivity {
 
 
    TextView T;
    Button b1;
    Button b2;
    Context c = this;
 
    protected void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        b2 = (Button) findViewById(R.id.b2);
        T = (TextView) findViewById(R.id.T);
 
        b1 = (Button) findViewById(R.id.b1);
 
 
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
 
 
                Toast.makeText(MainActivity.this, "Welcome to Our application", Toast.LENGTH_SHORT).show();
 
                //Intent i = new Intent(MainActivity.this, authentification.class);
 
                //startActivity(i);
            }
        })
        ;
        b2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder alert = new AlertDialog.Builder(c);
                alert.setTitle("Alert");
                alert.setMessage("Voulez Vous Quitter");
                alert.setPositiveButton("oui", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
 
 
                        finish();
                    }
                });
                alert.setNegativeButton("non", new DialogInterface.OnClickListener() {
 
 
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
 
                });
                alert.show();
            }
        });}
}

Mon fichier Xml

Code :

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<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"
    android:background="@mipmap/deux"
    tools:context=".MainActivity">
 
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="welcome"
        android:id="@+id/T"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:textColor="#ff0008"
        android:textSize="80sp"
        android:textStyle="bold|italic"
        android:layout_alignParentStart="true"
        android:allowUndo="false"
        android:autoText="false"
        android:clickable="false"
        android:contextClickable="false"
        android:drawableTint="#774545"
        android:elegantTextHeight="false"
        android:textIsSelectable="false"
        android:textColorHint="#ffffff"
        android:theme="@style/Base.Animation.AppCompat.DropDownUp"
        android:visibility="visible" />
 
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/b1"
 
        android:width="120dp"
        android:layout_alignParentBottom="true"
        android:layout_toEndOf="@+id/T"
        android:layout_marginLeft="-340dp"
        android:layout_marginBottom="42dp"
        android:visibility="invisible" />
 
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
 
 
        android:id="@+id/b2"
 
        android:clickable="false"
        android:width="100dp"
        android:layout_marginRight="0dp"
        android:layout_marginLeft="10dp"
        android:layout_alignTop="@+id/b1"
        android:layout_toStartOf="@+id/b1"
        android:visibility="invisible" />
 
 
</RelativeLayout>

le message d'erreur c'est java.lang.reflect.Method.invokeNative(Native Method)