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Android

MapFragment

I have a fragment. Inside of this one I have:

fragment  android:id="@+id/map_branch" android:layout_width="match_parent"  android:layout_height="match_parent"          android:layout_above="@+id/layout_bottom" class="com.google.android.gms.maps.MapFragment" />

In

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_stores, container);

It gives me the next bug:

Caused by: java.lang.ClassCastException: com.google.android.gms.maps.MapFragment cannot be cast to android.support.v4.app.Fragment

I found many answer using SupportFragment, but I want to use MapFragment.

Thanks.

2 Answers

Ben Jakuben
STAFF
Ben Jakuben
Treehouse Teacher

Can you paste in all your code, including the import statements?

Sorry for answer you so late. I would like to describe my target in the application. I need to implement a listview vertical or horizontal with many google maps controls. This listview will be customize with an ArrayAdapter and a specific layout.

MainActivity.java

package com.maps123;

import java.util.ArrayList;
import java.util.List;
import com.maps123.HorizontalListView;

import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

public class MainActivity extends ActionBarActivity {

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

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction().add(R.id.container, new PlaceholderFragment()).commit();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {
        GMapV2Direction mapDirection;
        private HorizontalListView hlvMapList;

        public PlaceholderFragment() { }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);

            hlvMapList = (HorizontalListView) rootView.findViewById(R.id.hlvMapList);

            List<Direction> list = new ArrayList<Direction>();
            list.add(new Direction("45.496290400000", "-73.555660200000"));
            list.add(new Direction("47.509036000000", "-67.639025500000"));

            MapListAdapter adapterMapBraches = new MapListAdapter(getActivity(), R.layout.row_maps_hlist, list);
            hlvMapList.setAdapter(adapterMapBraches);

            return rootView;
        }

        public class Direction {
            String latitude, longitude;

            public Direction() { }

            public Direction(String latitude, String longitude) {
                this.latitude = latitude;
                this.longitude = longitude;
            }

            public String getLongitude() {
                return longitude;
            }

            public void setLongitude(String longitude) {
                this.longitude = longitude;
            }

            public String getLatitude() {
                return latitude;
            }

            public void setLatitude(String latitude) {
                this.latitude = latitude;
            }
        }
    }
}

activity_main.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.maps123.MainActivity"
    tools:ignore="MergeRootFrame" />

fragment_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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.maps123.MainActivity$PlaceholderFragment" >

    <com.maps123.HorizontalListView
        android:id="@+id/hlvMapList"
        android:layout_width="match_parent"
        android:layout_height="160dp"
        android:layout_marginTop="4dp"
        android:layout_marginLeft="6dp"
        android:layout_marginRight="6dp" />
</RelativeLayout>

row_maps_hlist.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="170dp"
    android:layout_height="160dp" >

    <fragment
        android:id="@+id/map_branches"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="1dp"
        class="com.google.android.gms.maps.MapFragment" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="vertical"
        android:visibility="invisible" >

        <TextView
            android:id="@+id/tvTitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal"
            android:text="Simple String List"
            android:textStyle="bold"
            android:textSize="13sp" />

        <TextView
            android:id="@+id/tvDescription"
            android:layout_width="match_parent"
            android:layout_height="25dp"
            android:gravity="center_horizontal"
            android:text="Simple String List /n asdkfjasdkfjaskdfj"
            android:ellipsize="end"
            android:textSize="10sp" />

    </LinearLayout>
</RelativeLayout>

Thanks for your help.

Ben Jakuben
Ben Jakuben
Treehouse Teacher

It looks like you're using PlaceholderFragment, which extends the Fragment class, but your layout is expecting a MapFragment instead. What happens if you change PlaceholderFragment to extend MapFragment instead?