java.lang.NullPointerException: Tentative d'invoquer la méthode virtuelle 'boolean java.lang.Chaîne de caractères.equals(java.lang.Objet) " sur une référence d'objet nul

J'obtiens une erreur lors de l'exécution de mon projet.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.olympic/com.prima.olympic.ProductDetail}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference

C'est log complet :

06-06 23:12:45.561: E/AndroidRuntime(17135): FATAL EXCEPTION: main
06-06 23:12:45.561: E/AndroidRuntime(17135): Process: com.example.olympic, PID: 17135
06-06 23:12:45.561: E/AndroidRuntime(17135): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.olympic/com.prima.olympic.ProductDetail}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2693)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2758)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.ActivityThread.access$900(ActivityThread.java:177)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.os.Handler.dispatchMessage(Handler.java:102)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.os.Looper.loop(Looper.java:145)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.ActivityThread.main(ActivityThread.java:5942)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at java.lang.reflect.Method.invoke(Native Method)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at java.lang.reflect.Method.invoke(Method.java:372)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)
06-06 23:12:45.561: E/AndroidRuntime(17135): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
06-06 23:12:45.561: E/AndroidRuntime(17135):    at com.prima.olympic.ProductDetail.onCreate(ProductDetail.java:85)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.Activity.performCreate(Activity.java:6289)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
06-06 23:12:45.561: E/AndroidRuntime(17135):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)

C'est mon ProductDetail.java

public class ProductDetail extends Activity {
Button btnAddtoShoppingList;
Button btnDeleteShoppingList;
TextView detail_productType;
TextView detail_wdh;
TextView detail_volume;
TextView detail_weight;
TextView detail_cont20;
TextView detail_cont40;
TextView detail_pack;
TextView detail_quantity;
TextView detail_colour;
TextView detail_cetegories;
TextView detail_series;
TextView detail_price;
ImageView detail_imageView;
String shown_id, shown_type, shown_wdh, shown_volume, shown_weight, shown_cont20, shown_cont40, shown_pack, shown_quantity, shown_colour, shown_categories, shown_series, shown_price;
String customer_id, error_message ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_product_detail);
btnAddtoShoppingList = (Button)findViewById(R.id.btnAddtoShoppingList);
btnDeleteShoppingList = (Button)findViewById(R.id.btnDeleteShoppingList);
SharedPreferences userInformation = getApplicationContext().getSharedPreferences("userinfo", 0);
customer_id = userInformation.getString("customer_id", "none");
detail_productType = (TextView)findViewById(R.id.detail_productType);
detail_wdh = (TextView)findViewById(R.id.detail_wdh);
detail_volume = (TextView)findViewById(R.id.detail_volume);
detail_weight = (TextView)findViewById(R.id.detail_weight);
detail_cont20 = (TextView)findViewById(R.id.detail_cont20);
detail_cont40 = (TextView)findViewById(R.id.detail_cont40);
detail_pack = (TextView)findViewById(R.id.detail_pack);
detail_quantity = (TextView)findViewById(R.id.detail_quantity);
detail_colour = (TextView)findViewById(R.id.detail_colour);
detail_cetegories = (TextView)findViewById(R.id.detail_categories);
detail_series = (TextView)findViewById(R.id.detail_series);
detail_price = (TextView)findViewById(R.id.detail_price);
detail_imageView = (ImageView)findViewById(R.id.detail_imageView);
//Get Value from previous activity
Intent i = getIntent();
shown_id = i.getStringExtra("shown_id");
shown_type = i.getStringExtra("shown_type");
shown_wdh = i.getStringExtra("shown_wdh");
shown_volume = i.getStringExtra("shown_volume");
shown_weight = i.getStringExtra("shown_weight");
shown_cont20 = i.getStringExtra("shown_cont20");
shown_cont40 = i.getStringExtra("shown_cont40");
shown_pack = i.getStringExtra("shown_pack");
shown_quantity = i.getStringExtra("shown_quantity");
shown_colour = i.getStringExtra("shown_colour");
shown_categories = i.getStringExtra("shown_categories");
shown_series = i.getStringExtra("shown_series");
shown_price = i.getStringExtra("shown_price");
String checkOrigin = i.getStringExtra("from_activity");
if(checkOrigin.equals("shoppinglist")){
btnAddtoShoppingList.setVisibility(View.GONE);
btnDeleteShoppingList.setVisibility(View.VISIBLE);
}
Bitmap bitmap = (Bitmap) i.getParcelableExtra("shown_bitmap");
detail_productType.setText("PRODUCT TYPE        : "+shown_type);
detail_wdh.setText("W x D x H                                   : "+shown_wdh);
detail_volume.setText("VOLUME                                   : "+shown_volume);
detail_weight.setText("WEIGHT                                       : "+shown_weight);
detail_cont20.setText("CONT20                                   : "+shown_cont20);
detail_cont40.setText("CONT40                                   : "+shown_cont40);
detail_pack.setText("PACK                                               : "+shown_pack);
detail_quantity.setText("QUANTITY                           : "+shown_quantity);
detail_colour.setText("COLOUR                                   : "+shown_colour);
detail_cetegories.setText("CATEGORIES                   : "+shown_categories);
detail_series.setText("SERIES                                           : "+shown_series);
detail_price.setText("PRICE                                             : Rp "+shown_price);
detail_imageView.setImageBitmap(bitmap);
btnAddtoShoppingList.setOnClickListener(new View.OnClickListener() 
{
@Override
public void onClick(View v)
{
addtoShoppingListTask addtoShoppingList = new addtoShoppingListTask();
addtoShoppingList.execute((Void) null);
}
});
btnDeleteShoppingList.setOnClickListener(new View.OnClickListener() 
{
@Override
public void onClick(View v)
{
deleteShoppingListTask deletetoShoppingList = new deleteShoppingListTask();
deletetoShoppingList.execute((Void) null);
}
});
}

quelqu'un peut me dire où est l'erreur et comment y remédier s'il vous plaît? si quelqu'un peut aider je serai reconnaissante.

  • L'erreur deviennent évidentes quand vous comprenez ce qu'est un NullPointerException est. Aussi s'il vous plaît utiliser la bonne mise en forme Java pour votre code.
  • Veuillez éviter de simplement copier et coller votre code. Aussi, faire un peu de recherche avant de poser une question. Par exemple, cette question pourrait aider à résoudre votre problème.
InformationsquelleAutor Blue Venrir | 2015-06-06