How to return a result (startActivityForResult) from a TabHost Activity?
android, android-activity, android-tabhost
Solution
Oh, god! After spending several hours and downloading the Android sources, I have finally come to a solution.
If you look at the Activity class, you will see, that `finish()` method only sends back the result if there is a `mParent` property set to `null`. Otherwise the result is lost.
public void finish() {
if (mParent == null) {
int resultCode;
Intent resultData;
synchronized (this) {
resultCode = mResultCode;
resultData = mResultData;
}
if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken);
try {
if (ActivityManagerNative.getDefault()
.finishActivity(mToken, resultCode, resultData)) {
mFinished = true;
}
} catch (RemoteException e) {
// Empty
}
} else {
mParent.finishFromChild(this);
}
}
So my solution is to set result to the parent activity if present, like that:
Intent data = new Intent();
[...]
if (getParent() == null) {
setResult(Activity.RESULT_OK, data);
} else {
getParent().setResult(Activity.RESULT_OK, data);
}
finish();
I hope that will be helpful if someone looks for this problem workaround again.
Problem
I have 3 classes in my example: Class A, the main activity. Class A calls a startActivityForResult: ``` Intent intent = new Intent(this, ClassB.class); startActivityForResult(intent, "STRING"); ``` Class B, this class is a TabActivity: ``` Intent intent = new Intent(this, ClassC.class); tabHost.addTab... ``` Class C, this class is a regular Activity: ``` Intent intent = this.getIntent(); intent.putExtra("SOMETHING", "EXTRAS"); this.setResult(RESULT_OK, intent); finish(); ``` onActivityResult is called in Class A, but the resultCode is `RESULT_CANCELED` instead of `RESULT_OK` and the returned intent is null. How do I return something from the Activity inside a TabHost? I realize that the problem is that my Class C is actually running inside of Class B, and Class B is what is returning the `RESULT_CANCELED` back to Class A. I just don't know a work around yet.