Intent of ListView onClick

Question

Hello i want to go to another activity when i click a element of a listview but i want to pass the data of that listview to the other activity. I have search but always crash when it goes to the other activity. If i print the string it works correct, here is my code

 listaEmpresas.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            Object x = arrayadapter.getItem(position);
            String titulo  = (String) x;
            Log.i("info", titulo);


            Intent i = new Intent(Display.this, MasInfo.class);
            i.putExtra("titulo", x.toString());
            startActivity(i);
        }
    });

And in the other side i have

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_mas_info);

    Bundle bundle = getIntent().getExtras();
    String titulo = bundle.getString("titulo");
}

here is the error

 FATAL EXCEPTION: main
                                                                          Process: juanjoserodrigo.chilereclama, PID: 22293
                                                                          java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{juanjoserodrigo.chilereclama/juanjoserodrigo.chilereclama.MasInfo}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
                                                                              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2371)
                                                                              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2522)
                                                                              at android.app.ActivityThread.access$800(ActivityThread.java:167)
                                                                              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1417)
                                                                              at android.os.Handler.dispatchMessage(Handler.java:111)
                                                                              at android.os.Looper.loop(Looper.java:179)
                                                                              at android.app.ActivityThread.main(ActivityThread.java:5537)
                                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                                              at java.lang.reflect.Method.invoke(Method.java:372)
                                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:956)
                                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:751)
                                                                           Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
                                                                              at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:120)
                                                                              at android.support.v7.app.AppCompatDelegateImplV9.<init>(AppCompatDelegateImplV9.java:151)
                                                                              at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:31)
                                                                              at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:55)
                                                                              at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:205)
                                                                              at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:185)
                                                                              at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:519)
                                                                              at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:190)
                                                                              at juanjoserodrigo.chilereclama.MasInfo.<init>(MasInfo.java:15)
                                                                              at java.lang.reflect.Constructor.newInstance(Native Method)
                                                                              at java.lang.Class.newInstance(Class.java:1572)
                                                                              at android.app.Instrumentation.newActivity(Instrumentation.java:1070)
                                                                              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2361)
                                                                              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2522) 
                                                                              at android.app.ActivityThread.access$800(ActivityThread.java:167) 
                                                                              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1417) 
                                                                              at android.os.Handler.dispatchMessage(Handler.java:111) 
                                                                              at android.os.Looper.loop(Looper.java:179) 
                                                                              at android.app.ActivityThread.main(ActivityThread.java:5537) 
                                                                              at java.lang.reflect.Method.invoke(Native Method) 
                                                                              at java.lang.reflect.Method.invoke(Method.java:372)

It is the error message shown when the app crashes (found in the android monitor). — Sam Yuyitung, Mar 16 '17 at 01:55
Can you please add the whole stack trace (all the red text) to your post above. This can better help us diagnose your problem — Sam Yuyitung, Mar 16 '17 at 01:58
Possible duplicate of [What is a NullPointerException, and how do I fix it?](http://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it) — NewBie1234, Mar 16 '17 at 02:23

score 0 · Answer 1 · answered Mar 16 '17 at 01:46

0

Since the getItem returns an int, your error is probably telling you that you cannot cast an integer to string. That should be your problem.

answered Mar 16 '17 at 01:46

im not converting a int to string im getting the value of the list view and send it to the other activity – Antonia Bravo Mar 16 '17 at 01:50
Are you using Android Studio? – Mar 16 '17 at 01:57

Intent of ListView onClick

1 Answers1