Restrictions of MapActivity

README

You SHOULD NOT run multiple MapActivities simultaneously.

** put your own demo key for map view @ res/layout/mapview.xml **

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2009 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
          http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<!-- Declare the contents of this Android application.  The namespace
     attribute brings in the Android platform namespace, and the package
     supplies a unique name for the application.  When writing your
     own application, the package name must be changed from "com.example.*"
     to come from a domain that you own or have control over. -->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android.google.apis">

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application android:label="@string/activity_sample_code"
            android:icon="@drawable/app_sample_code" >

        <uses-library android:name="com.google.android.maps" />

        <activity android:name="com.example.android.apis.view.MapViewDemo" android:label="MapView">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER"></category>
            </intent-filter>
        </activity>

   </application>
</manifest>

app_sample_code.png

mapview.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
          http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<!-- Demonstrates use of the com.google.android.maps.MapView.
     See corresponding Java code com.example.android.apis.view.MapViewDemo.java. -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/main"
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent">
    <com.google.android.maps.MapView
        android:id="@+id/map_view"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:enabled="true"
        android:clickable="true"
        android:apiKey="** use your own map demo key! **"
        />
</LinearLayout>

MapViewDemo.java

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import android.content.Intent;
import android.os.Bundle;

import com.example.android.google.apis.R;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;

/**
 * Example of why you should not create multiple MapActivities at the same time.
 * {@link com.google.android.maps.MapActivity}.
 * <h3>MapViewDemo</h3>
 */
public class MapViewDemo extends MapActivity {
    private static int sInstanceCount = 0;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        setContentView(R.layout.mapview);
        MapView mapView = (MapView) findViewById(R.id.map_view);
        mapView.setBuiltInZoomControls(true);
        if (++sInstanceCount == 1) {
            startActivity(
                new Intent(this, getClass())
                    .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
        }
    }
    
    @Override
    protected boolean isRouteDisplayed() { return false; }
}

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
          http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
    <string name="activity_sample_code">Maps API Demos</string>
</resources>