"Activity not found" in Android

Question

I am using the navigation-drawer template in eclipse to do a simple Android application. I have some trouble with fragment. I declared a fragment called PresenceLog Fragment in manifest but when I called it in MainActivity, the log still says that

03-23 13:54:50.817: E/AndroidRuntime(16750): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.singtel.ricecooker/com.singtel.ricecooker.PresenceLogFragment}; have you declared this activity in your AndroidManifest.xml?

Here is my manifest

Here is my fragment class

public class PresenceLogFragment extends Fragment{
private TextView myText = null;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    return inflater.inflate(R.layout.presence_log, null);
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);

    ArrayList<String> userList = null;
    RiceServerRequest newRequest = new RiceServerRequest();
    //newRequest.getRequestInfo(this);

}

public void updateUserList(ArrayList<String> userList){
    LinearLayout lView = (LinearLayout) getView().findViewById (R.layout.presence_log);
    //LinearLayout ll = (LinearLayout)fragment.getView().findViewById(R.id.commentFragmentLayout);

    for (int i = 0; i < userList.size();i++){
        myText = new TextView(getActivity());
        myText.setText(userList.get(i));
        lView.addView(myText);
    }
    //setContentView(lView);
}

Here is my MainActivity

private void launchPresenceLog(){
    Intent intent = new Intent(this,PresenceLogFragment.class);
    startActivity(intent);
}

It would be great if you know what is wrong with my code. Also, since I am new to Android programming, I would appreciate it if you could suggest some online courses.

@ashutiwari4 He is trying to start a FRAGMENT using an INTENT as an ACTIVITY. This is completely wrong, refer to https://developer.android.com/training/basics/fragments/creating.html — EpicPandaForce, Mar 23 '15 at 12:53
@EpicPandaForce Yup, I just realized that. I want to change a previously written Activity into Fragment and forgot to change this part. Also, do you know what is the equivalent of setContentView for Fragment (I want to update the page as I request information from server)? — Haribo, Mar 23 '15 at 14:43
Activity `setContentView(R.layout.something)` becomes Fragment `public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle saveInstanceState) { View view = inflater.inflate(R.layout.something, container, false); return view; }` — EpicPandaForce, Mar 23 '15 at 14:45

score 2 · Accepted Answer · answered Mar 23 '15 at 12:46

You have created a Fragment so you could not call it like a Activity. You need to replace a container view, properly an FrameLayout with your Fragment.

getSupportFragmentManager()
  .beginTransaction()
  .replace(R.id.content_frame, new PresenceLogFragment())
  .commit();

score 1 · Answer 2 · answered Mar 23 '15 at 12:50

You can't load a fragment through Intent. You have to do it using fragment manager in this way:

Fragment fragment = new PresenceLogFragment(MainActivity.this);
FragmentManager fragmentManager = getFragmentManager();
            FragmentTransaction ft = fragmentManager.beginTransaction();                
            ft.replace(R.id.yourFragmentContainer, fragment).commit();

score 0 · Answer 3 · answered Mar 23 '15 at 12:34

 have you declared this activity in your AndroidManifest.xml?

Look in your manifest and see if you have an <activity> element that has your activity registered. If not, add one.

Have a look here: http://developer.android.com/guide/topics/manifest/activity-element.html

score 0 · Answer 4 · edited May 23 '17 at 12:10

0

it is clear.

"have you declared this activity in your AndroidManifest.xml?"

you should check is there a tag。

see this or maybe this

edited May 23 '17 at 12:10

Community

1
1

answered Mar 23 '15 at 12:43

Evan

266
4
5

score 0 · Answer 5 · answered Mar 23 '15 at 12:48

Please open the manifest file and declare like this:

<activity
        android:name=".MainActivity" //your activity name
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

if this is your lauch activity then do this otherwise do this

<activity
        android:name=".MainActivity"//your activity name
        android:label="@string/app_name" >
    </activity>

type the name of your java file which extends Activity not the Fargment. Means the Fragment which creates from that Activity java file.

score 0 · Answer 6 · answered Mar 23 '15 at 12:49

 <activity
        android:name="com.singtel.ricecooker.PresenceLogFragment"
        android:label="@string/app_name" >
    </activity>

add this in your manifest file if com.singtel.ricecooker.PresenceLogFragment represents an activity and if it is a fragment then you are doing it wrong. in second case use below code,

getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, new PresenceLogFragment())
.commit();

score 0 · Answer 7 · edited May 23 '17 at 12:17

0

You are trying to use a fragment as an activity. You can either rename PresenceLogFragment to PresenceLogActivity and have it extend Activity instead of Fragment or you can try and use your fragment as a fragment.

Also, any activity you try to use in your app needs to be declared in the manifest (link)

More about fragments and how to use them here

edited May 23 '17 at 12:17

Community

1
1

answered Mar 23 '15 at 12:54

Andrei Tudor Diaconu

2,157
21
26

score -1 · Answer 8 · edited Dec 22 '21 at 21:09

-1

Navigation.findNavController(view).navigate(R.id.youAc)

edited Dec 22 '21 at 21:09

ata

1,254
1
9
30

answered Dec 22 '21 at 15:23

Elbek Azimjonov

1
1

"Activity not found" in Android

8 Answers8

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