Question

I have two Applications, A and B, both applications are made by me but they are in different packages. I want to extract some data from my Activity B to my Activity A.

For this I use ActivityA.startactivityforresult(ActivityB).

This works ok, up until I need to retrive my data from ActivityB, then I start getting NullpointerExceptions for my getExtra() calls.

ActivityA:

protected void someMethod()
{
    Intent intent = getPackageManager().getLaunchIntentForPackage("some.package.app");
    intent.putExtra("action", "retrieveData");
    startActivityForResult(intent, 7854);
}

protected void onActivityResult (int requestCode, int resultCode, Intent intent)
{
    Log.d(TAG, "test: " + intent.getExtras().getString("test"));
}

ActivityB:

protected void onResume ()
{
    if (getIntent().getExtras() != null && getIntent().getExtras().getString("action").equals("retrieveData"))
    {
        Intent intent = getIntent();
        intent.putExtra("test", "This is a test response");

        setResult(7854, intent);
        finish();
    }
}

---

OUTPUT: test: null

Am I doing something wrong, or is this simply not allowed?

UPDATE

04-18 18:28:34.908: E/AndroidRuntime(15711): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=7854, result=0, data=null} to activity {dk.rasive.testA/dk.rasive.testA.TestActivity}: java.lang.NullPointerException
04-18 18:32:48.892: E/AndroidRuntime(15801):    at dk.rasive.testA.TestActivity.onActivityResult(TestActivity.java:245)

Line 245 contains this code

Log.d(TAG, "test: " + intent.getExtras().getString("test"));

Answer 1

I haven’t tried with Activities in different Applications but Activity A needs to override

onActivityResult(int requestCode, int resultCode, Intent data)

Also

setResult

takes a ResultCode not a RequestCode although that won’t make a difference in the snippet you posted.

EDIT:

androidmanifest.xml

    <activity
        android:name="ActivityB"
        <intent-filter>
            <action android:name='retrieveData'/>
        </intent-filter>
    </activity>