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invoke vittual method java.lang.string java. lang.toString ()' on Null object reference

Discussion in 'Android Development' started by Chaly, Aug 29, 2019.

  1. Chaly

    Chaly Lurker
    Thread Starter

    Bonjour à tous,

    Je suis nouveau dans le fabuleux monde de la création d'application android. Je débute avec SKETCHWARE et après avoir suivi un tuto pour créer une base de données avec firebase, en lançant l'application et en allant sur une des pages de mon Menu, cette erreur apparaît :

    " Attempt To invoke vittual method java.lang.string java. lang.toString ()' on Null object reference
    At
    Com.my.newProject.ProduitsActivity
    $listview1Adapter.getView(ProduitsActivity.java:293) "


    Je ne trouve pas mon erreur,

    Pourriez vous m'apporter vos lumières s'il vous plait . Je n'arrive plus à avancer dans mon projet.

    Merci d'avance.
    Charly.

    voici mon code :

    package com.my.newproject;

    import android.app.*;
    import android.os.*;
    import android.view.*;
    import android.view.View.*;
    import android.widget.*;
    import android.content.*;
    import android.graphics.*;
    import android.media.*;
    import android.net.*;
    import android.text.*;
    import android.util.*;
    import android.webkit.*;
    import android.animation.*;
    import android.view.animation.*;
    import java.util.*;
    import java.text.*;
    import android.support.v7.app.AppCompatActivity;
    import android.widget.LinearLayout;
    import android.widget.Button;
    import java.util.Timer;
    import java.util.TimerTask;
    import android.content.Intent;
    import android.net.Uri;
    import android.animation.ObjectAnimator;
    import android.view.animation.LinearInterpolator;
    import android.view.animation.AccelerateInterpolator;
    import android.view.animation.DecelerateInterpolator;
    import android.view.animation.AccelerateDecelerateInterpolator;
    import android.view.animation.BounceInterpolator;
    import android.view.View;

    public class MainActivity extends AppCompatActivity {

    private Timer _timer = new Timer();

    private double rotation = 0;
    private double click = 0;
    private double xbk = 0;

    private LinearLayout linear1;
    private LinearLayout linear2;
    private Button menu;
    private LinearLayout linear3;
    private LinearLayout linear4;
    private Button button8;
    private Button button2;
    private Button button3;
    private Button button4;
    private Button button5;
    private Button button6;

    private TimerTask timer;
    private Intent intent = new Intent();
    private ObjectAnimator ani = new ObjectAnimator();
    private Intent show = new Intent();
    @override
    protected void onCreate(Bundle _savedInstanceState) {
    super.onCreate(_savedInstanceState);
    setContentView(R.layout.main);
    initialize(_savedInstanceState);
    initializeLogic();
    }

    private void initialize(Bundle _savedInstanceState) {

    linear1 = (LinearLayout) findViewById(R.id.linear1);
    linear2 = (LinearLayout) findViewById(R.id.linear2);
    menu = (Button) findViewById(R.id.menu);
    linear3 = (LinearLayout) findViewById(R.id.linear3);
    linear4 = (LinearLayout) findViewById(R.id.linear4);
    button8 = (Button) findViewById(R.id.button8);
    button2 = (Button) findViewById(R.id.button2);
    button3 = (Button) findViewById(R.id.button3);
    button4 = (Button) findViewById(R.id.button4);
    button5 = (Button) findViewById(R.id.button5);
    button6 = (Button) findViewById(R.id.button6);

    menu.setOnClickListener(new View.OnClickListener() {
    @override
    public void onClick(View _view) {
    click++;
    if (click == 1) {
    ani.setTarget(linear4);
    ani.setPropertyName("translationX");
    ani.setFloatValues((float)(SketchwareUtil.getDip(getApplicationContext(), (int)(-200)) - SketchwareUtil.getDisplayWidthPixels(getApplicationContext())), (float)(0 - SketchwareUtil.getDisplayWidthPixels(getApplicationContext())));
    ani.setDuration((int)(500));
    ani.setRepeatMode(ValueAnimator.REVERSE);
    ani.setRepeatCount((int)(0));
    ani.setInterpolator(new AccelerateInterpolator());
    ani.start();
    }
    else {
    if (click == 2) {
    ani.setTarget(linear4);
    ani.setFloatValues((float)(0 - SketchwareUtil.getDisplayWidthPixels(getApplicationContext())), (float)(SketchwareUtil.getDip(getApplicationContext(), (int)(-200)) - SketchwareUtil.getDisplayWidthPixels(getApplicationContext())));
    ani.start();
    click = 0;
    }
    }
    }
    });

    button8.setOnClickListener(new View.OnClickListener() {
    @override
    public void onClick(View _view) {

    }
    });

    button2.setOnClickListener(new View.OnClickListener() {
    @override
    public void onClick(View _view) {
    intent.setClass(getApplicationContext(), DonneesActivity.class);
    startActivity(intent);
    }
    });

    button3.setOnClickListener(new View.OnClickListener() {
    @override
    public void onClick(View _view) {
    intent.setClass(getApplicationContext(), ClientsActivity.class);
    startActivity(intent);
    }
    });

    button4.setOnClickListener(new View.OnClickListener() {
    @override
    public void onClick(View _view) {
    intent.setClass(getApplicationContext(), ProduitsActivity.class);
    startActivity(intent);
    }
    });

    button5.setOnClickListener(new View.OnClickListener() {
    @override
    public void onClick(View _view) {
    intent.setClass(getApplicationContext(), EditionfactdevActivity.class);
    startActivity(intent);
    }
    });

    button6.setOnClickListener(new View.OnClickListener() {
    @override
    public void onClick(View _view) {
    intent.setClass(getApplicationContext(), VisuelfactdevActivity.class);
    startActivity(intent);
    }
    });
    }
    private void initializeLogic() {
    click = 0;
    }

    @override
    protected void onActivityResult(int _requestCode, int _resultCode, Intent _data) {
    super.onActivityResult(_requestCode, _resultCode, _data);

    switch (_requestCode) {

    default:
    break;
    }
    }

    @override
    public void onBackPressed() {
    xbk++;
    if (xbk == 2) {
    xbk = 2;
    finish();
    }
    else {
    SketchwareUtil.showMessage(getApplicationContext(), "Presser 2 fois pour quitter !");
    }
    }
    @Deprecated
    public void showMessage(String _s) {
    Toast.makeText(getApplicationContext(), _s, Toast.LENGTH_SHORT).show();
    }

    @Deprecated
    public int getLocationX(View _v) {
    int _location[] = new int[2];
    _v.getLocationInWindow(_location);
    return _location[0];
    }

    @Deprecated
    public int getLocationY(View _v) {
    int _location[] = new int[2];
    _v.getLocationInWindow(_location);
    return _location[1];
    }

    @Deprecated
    public int getRandom(int _min, int _max) {
    Random random = new Random();
    return random.nextInt(_max - _min + 1) + _min;
    }

    @Deprecated
    public ArrayList<Double> getCheckedItemPositionsToArray(ListView _list) {
    ArrayList<Double> _result = new ArrayList<Double>();
    SparseBooleanArray _arr = _list.getCheckedItemPositions();
    for (int _iIdx = 0; _iIdx < _arr.size(); _iIdx++) {
    if (_arr.valueAt(_iIdx))
    _result.add((double)_arr.keyAt(_iIdx));
    }
    return _result;
    }

    @Deprecated
    public float getDip(int _input){
    return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, _input, getResources().getDisplayMetrics());
    }

    @Deprecated
    public int getDisplayWidthPixels(){
    return getResources().getDisplayMetrics().widthPixels;
    }

    @Deprecated
    public int getDisplayHeightPixels(){
    return getResources().getDisplayMetrics().heightPixels;
    }

    }
     

    Attached Files:



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