Convert an Activity into Fragment for another activity (android)

Question

So I'm having difficulties in understanding how these things work. I have an activity called MapsActivity. Its signature is:

package com.ap2.demoapp;

import android.app.ActivityManager;

import android.location.Location;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MapsActivity extends FragmentActivity implements GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener,
        LocationListener {

    private GoogleMap mMap; // Might be null if Google Play services APK is not available.
    private LocationRequest mLocationRequest;
    GoogleApiClient mGoogleApiClient;
    private boolean enter = false;
    // define :
    private static final int SECONDS = 1000;
    private static final long INTERVAL = 10 * SECONDS;
    private static final long FASTEST_INTERVAL = 5 * SECONDS;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        setUpMapIfNeeded();

        if (!isGooglePlayServicesAvailable()) {
            finish();
        }
        createLocationRequest();

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

    }
    @Override
    public void onStart() {
        super.onStart();
        mGoogleApiClient.connect();

    }

    @Override
    protected void onResume() {
        super.onResume();
        if (!enter && mGoogleApiClient.isConnected()) {
            enter = true;
            startLocationUpdates();
        }
        setUpMapIfNeeded();
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (enter && mGoogleApiClient.isConnected()) {
            stopLocationUpdates();
            enter = false;
        }

    }
    @Override
    public void onStop() {
        super.onStop();
        mGoogleApiClient.disconnect();
    }

    private void setUpMapIfNeeded() {
        // Do a null check to confirm that we have not already instantiated the map.
        if (mMap == null) {
            // Try to obtain the map from the SupportMapFragment.
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();
            // Check if we were successful in obtaining the map.
            if (mMap != null) {
                setUpMap();
                //animation

                Thread t = new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            Thread.sleep(5000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                });
                t.start();
            }
        }
    }


    private void setUpMap() {
        mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("My Location"));
    }

    @Override
    public void onConnected(Bundle bundle) {
        Toast.makeText(this,"Starting location updates",Toast.LENGTH_SHORT).show();
        startLocationUpdates();
    }
    protected void startLocationUpdates() {
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
                mLocationRequest, (com.google.android.gms.location.LocationListener) this);
    }
    protected void stopLocationUpdates() {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient,
                (com.google.android.gms.location.LocationListener) this);
    }
    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Toast.makeText(this,"Failed to connect location updates",Toast.LENGTH_SHORT).show();
    }
    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onLocationChanged(final Location location) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                CameraPosition cameraPosition = new CameraPosition.Builder()
                        .target(new LatLng(location.getLatitude(),location.getLongitude())) // Sets the center of the map
                        .zoom(17) // Sets the zoom
                        .bearing(90) // Sets the orientation of the camera to east
                        .tilt(30) // Sets the tilt of the camera to 30 degrees
                        .build(); // Creates a CameraPosition from the builder

                mMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
            }
        });
    }


    private boolean isGooglePlayServicesAvailable() {
        int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
        if (status == ConnectionResult.SUCCESS) {
            return true;
        } else {
            GooglePlayServicesUtil.getErrorDialog(status, this,0).show();
            return false;
        }
    }
    protected void createLocationRequest() {
        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(INTERVAL);
        mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    }


}

XML:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:id="@+id/map"
    tools:context="com.ap2.demoapp.MapsActivity"
    android:name="com.google.android.gms.maps.SupportMapFragment" />

Now i have a main activity that looks like that:

package com.ap2.demoapp;

import android.content.res.Configuration;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {
                Fragment newFragment   = new MainFragment();
                FragmentManager fm     = getSupportFragmentManager();
                FragmentTransaction ft = fm.beginTransaction();

                if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
                    ft.add(R.id.menuFragment, new MenuFragment());
                }
                // adding the fragment:


                ft.add(R.id.mainFragment, getSupportFragmentManager().findFragmentById(R.id.map)); // always NULL


                ft.commit();
            }
        });
        t.start();
    }


}

XML:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#001122"
    tools:context="com.ap2.demoapp.MainActivity">

    <RelativeLayout
        android:id="@+id/mainFragment"
        android:background="#ffffff"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="2"
        ></RelativeLayout>



</RelativeLayout>

Does anyone have a clue as to what I'm doing wrong? I would like to activate my MapsActivity as a fragment in the MainActivity.

Does anyone know what I should do?

Thanks in advance.

I posted an answer. Is that what you are trying to do? – Eugene H May 22 '15 at 15:51 — Eugene H, May 22 '15 at 15:51

Eugene H · Accepted Answer · 2015-05-22T16:07:53.253

You cannot use a class that extends any "Activity" as a fragment. It needs to extend Fragment. In this case I would just place the maps fragment within activity layout.

First Solution

Adding The Maps Fragment within the Activity layout

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#001122"
    tools:context="com.ap2.demoapp.MainActivity">

    <fragment 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment" />

</RelativeLayout>

Activity

public class MainActivity extends ActionBarActivity {
    GoogleMap mMap;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mMap == null) {
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        }
    }
}

Call all of your implements within the MainActivity class.

public class MainActivity extends ActionBarActivity implements GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener,
    LocationListener

Run this, and tell me if it shows the map.

Second Solution

MainActivity

public class MainActivity extends ActionBarActivity {
    GoogleMap mMap;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         getSupportFragmentManager().beginTransaction().replace(R.id.mainFragment, new MapsActivity()).commit();
    }
}

activity_main.xml

<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#001122"
    tools:context="com.ap2.demoapp.MainActivity">

    <RelativeLayout
        android:id="@+id/mainFragment"
        android:background="#ffffff"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="2" />

</RelativeLayout>

Fragment

public class MapsActivity extends Fragment {
    View v;
    GoogleMap mMap;
    public MapsActivity() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        v = inflater.inflate(R.layout.activity_mapsactivity, container, false);
        if (mMap == null) {
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        }
        return v;
    }

Fragment Layout

<fragment
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:id="@+id/map"
    tools:context="com.ap2.demoapp.MapsActivity"
    android:name="com.google.android.gms.maps.SupportMapFragment" />

Hi i forgot to add my MapsCode: i've uploaded it again. i just couldn't figure your soultion..can you take another look?:) — dan, May 22 '15 at 17:18
@dan Have you looked at the code I posted about adding the fragment to the activity? What is it that you are exactly looking to do? — Eugene H, May 22 '15 at 17:28
@dan I am in a bit of a hurry rite now, can you try and get back to me fast — Eugene H, May 22 '15 at 17:34
I mean i'm trying to build an activity that will have a title (MainActivity for now), and underneath a map with my current location will take place — dan, May 22 '15 at 17:37
@dan Your question says "Convert an Activity into Fragment for another activity (android)" I posted the code to do that. You can add the rest of the location data code after you implement the two examples I gave you — Eugene H, May 22 '15 at 17:38
@dan I just need you to be more specific. You want a TextView under the map with the location? — Eugene H, May 22 '15 at 17:39
and under the title the map will appear (as a fragment of MainActiviy — dan, May 22 '15 at 17:41
Put a map under the Actionbar or Toolbar that contains the title, "Main Activity" ? — Eugene H, May 22 '15 at 17:43
We will be able to take this into a private conversation to solve this issue and get you moving with the rest of your code — Eugene H, May 22 '15 at 17:45

Convert an Activity into Fragment for another activity (android)

1 Answers1