I want to pass data in between two activity using Intent but why it is not working?

Question

I already tried this code in my activity ..

In my First Activity this is my code to pass data :

Intent intent = new Intent(getApplicationContext(), TeacherSideQuestion2.class);
    Bundle bundle = new Bundle();
    bundle.putInt("score", finalScore);
    intent.putExtras(bundle);
    startActivityForResult(intent,0);

and in my Second Activity , here's the code to retrieve my data .

public void onClick() {
    Bundle bundle = getIntent().getExtras();
    // int temp = extras.getInt("score", 0);
    // int temp = i.getExtras().getInt("score", 0);
    if (bundle != null) {
        int temp = bundle.getInt("score", 0);
        if (temp >= 1) {
            Intent intent = new Intent(TeacherSideQuestion2.this,
                    CongratsEnglish.class);
            startActivity(intent);
        } else {
            Intent intent1 = new Intent(TeacherSideQuestion2.this,
                    FailedEnglish.class);
            startActivity(intent1);
        }
    }
}

but when I try to click the onClick event , my application will crash .

can anyone fix this ?

Thank you for your answers .

Here's the LogCat says :

  12-20 03:51:38.973: E/AndroidRuntime(3051): FATAL EXCEPTION: main
12-20 03:51:38.973: E/AndroidRuntime(3051): java.lang.RuntimeException: Unable to instantiate application android.app.Application: java.lang.NullPointerException
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.LoadedApk.makeApplication(LoadedApk.java:504)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4364)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.ActivityThread.access$1300(ActivityThread.java:141)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1294)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.os.Looper.loop(Looper.java:137)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.ActivityThread.main(ActivityThread.java:5039)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at java.lang.reflect.Method.invokeNative(Native Method)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at java.lang.reflect.Method.invoke(Method.java:511)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at dalvik.system.NativeStart.main(Native Method)
12-20 03:51:38.973: E/AndroidRuntime(3051): Caused by: java.lang.NullPointerException
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:379)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.LoadedApk.getClassLoader(LoadedApk.java:322)
12-20 03:51:38.973: E/AndroidRuntime(3051):     at android.app.LoadedApk.makeApplication(LoadedApk.java:496)
12-20 03:51:38.973: E/AndroidRuntime(3051):     ... 11 more
12-20 03:51:40.223: E/Trace(3085): error opening trace file: No such file or directory (2)

I will third "Post the logcat". But in the meantime, its likely that the other `Activities` aren't declared in the `manifest.xml`. Also, why are you using `startActivityForResult()` if you are starting different `Activities` and not returning a result? — codeMagic, Dec 20 '13 at 04:12
you getting error at line 379 in LoadedApk.java:. what is at this line? — Niranj Patel, Dec 20 '13 at 04:22
check this [link](http://stackoverflow.com/a/10397249/1265724) — Ram kiran Pachigolla, Dec 20 '13 at 04:25
@Cap droid how can I view the corresponding number of lines ? sorry for many questions because I'm just new to android . — kyo, Dec 20 '13 at 04:37
@codeMagic Yes . I already declared everything in manefest . and I also change it to startActivity(). — kyo, Dec 20 '13 at 04:41
http://www.mkyong.com/eclipse/how-to-display-line-numbers-in-eclipse/ — Niranj Patel, Dec 20 '13 at 04:42
After using Google, this link maybe solves your problem http://stackoverflow.com/questions/10399789/java-lang-runtimeexception-unable-to-instantiate-application-android-app-applic — Cuong Huynh, Dec 20 '13 at 05:07
@kyo you are missing some of your logcat, I believe, make sure you have posted all of it from the crash. These lines don't reference your project but the Android framework instead — codeMagic, Dec 20 '13 at 12:10

score 3 · Answer 1 · answered Dec 20 '13 at 04:12

Try this :

Intent intent = new Intent(MyActivity.this,YourClass.class);
intent.putInt("score",finalScore);
startActivity(intent);

and in receiving class receive it like this in your onCreate()

int defValue = -999;
Intent intent = getIntent();
int score = intent.getIntExtra("score",defValue);  // defalut value can be anything if score not get recieved

Rakeeb Rajbhandari · Answer 2 · 2013-12-20T05:06:56.720

0

In your First Activity this is my code to pass data :

Intent intent = new Intent(getApplicationContext(), TeacherSideQuestion2.class);
Bundle bundle = new Bundle();
bundle.putInt("score", finalScore);
intent.putExtras(bundle);
startActivity(intent);

In Second Activity:

Declare int i as a global variable.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    i  = getIntent().getIntExtra("", 0);
}

and on your button.setOnClick {
    if (i >= 1) {
            Intent intent = new Intent(TeacherSideQuestion2.this,
                    CongratsEnglish.class);
            startActivity(intent);
        } else {
            Intent intent1 = new Intent(TeacherSideQuestion2.this,
                    FailedEnglish.class);
            startActivity(intent1);
        }
}

edited Dec 20 '13 at 05:06

answered Dec 20 '13 at 04:14

Rakeeb Rajbhandari

5,043
6
43
74

stiLL . it gets crashing . – kyo Dec 20 '13 at 04:21
@kyo could you post these lines : `at android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:379)` `at android.app.LoadedApk.getClassLoader(LoadedApk.java:322)` – Rakeeb Rajbhandari Dec 20 '13 at 04:24
how can I view the corresponding number of lines ? – kyo Dec 20 '13 at 04:35
so that I can post it . – kyo Dec 20 '13 at 04:35
are you using eclipse ? – Rakeeb Rajbhandari Dec 20 '13 at 04:37
at the edge of your editor ... where you see the error icons, etc right click on the left edge. you should see an option called `Show Line Numbers` – Rakeeb Rajbhandari Dec 20 '13 at 04:45

score 0 · Answer 3 · answered Dec 20 '13 at 04:26

0

Check your manifest file and see if you have entries for all the activities. Check your min sdk and target sdk in manifest file and android properties.

answered Dec 20 '13 at 04:26

sachin garg

1,316
15
27

in your second activity, try to instantiate Bundle object in onCreate and pass it as parameter to onClick. – sachin garg Dec 20 '13 at 04:32

score 0 · Answer 4 · answered Jan 12 '14 at 22:56

Change startActivityForResult(intent,0); to startActivity(intent); because you don't need to start it for a result just to pass a value to another activity.

I'm not sure if this would be a problem, but you may need to change getApplicationContext() to YourActivityName.this.

Last thing, you don't need to create a bundle to send a value to another activity. You can just do it like this:

Intent intent = new Intent(YourActivityName.this, TeacherSideQuestion2.class);
intent.putExtra("score",finalscore);
startActivity(intent);

I want to pass data in between two activity using Intent but why it is not working?

4 Answers4