Simple map app on Android(google api v2). Doesnt work. Error

Question

I try to program an easy map app on Android but the only outcome are errors. I tried to program it the way it should be but it still doesn\'t work.

mainactivity<

Answer 1

you need to extend with FragmentActivity instead of Activity

Answer 2

Check my answer below :

In your xml file change this class="com.google.android.gms.maps.MapFragment" to android:name="com.google.android.gms.maps.SupportMapFragment"

Extend your activity to FragmentActivty and change

map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)) .getMap(); to
map= ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap();

Also check if (map== null) { map= ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap();}

Check your manifest file :

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.googlemapsv2"
android:versionCode="1"
android:versionName="1.0" >

<permission
    android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE"
    android:protectionLevel="signature" />

<uses-permission android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE" />

<uses-sdk
    android:minSdkVersion="12"
    android:targetSdkVersion="17" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true" />

<!-- Requires OpenGL ES version 2 -->
<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:name="com.example.googlemapsv2.MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppBaseTheme" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

    <!-- Google API Key -->
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
    <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="your Google map API key" />
</application>

Hope this helps.

Answer 3

In your layout XML try to use

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

    </com.google.android.gms.maps.MapView>

instead this

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

And import google play services on your project. Here I've explained how to do it