使用Google Maps API android无法显示地图

Question

I am installing the Google Maps API on my app. I have everything running and can launch the Google Maps Activity, but the Map doesn't display. It just shows a grid that you can zoom in and out on.

    package com.fotolife.app;

import android.os.Bundle;

import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;

public class Map extends MapActivity {

    @Override
    protected boolean isRouteDisplayed() {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    protected void onCreate(Bundle arg0) {
        // TODO Auto-generated method stub
        super.onCreate(arg0);
        setContentView(R.layout.map);


    }


}

^ that is my Map.java

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <com.google.android.maps.MapView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/mapview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:clickable="true"
    android:apiKey="I Took this out for security reasons, but it works."
/>

</LinearLayout>

^ Here is my map.xml

Thanks for the help!

Answer 1

If you are using Google Maps Android API v2 that's probably the reason why your project is not working. To get this working you must go through the following steps:

Download and configure Google Play Services from SDK manager

Google Play Services are part of the extras of Android's SDK. You can found it in the extras section.

Add google play services lib JAR to your project build path

The lib JAR is installed in the path

$ANDROIDSDK_HOME/extras/google/google_play_services/libproject/google-play-services_lib/libs

Get an API key using Google APIs Console

You may generate a SHA1 fingerprint for debug purposes using your OS console by issuing the command:

$ keytool -list -v -keystore ~/.android/debug.keystore -storepass android

In the Google APIs Console go to API Access and in the right pane chose "Create new Android key...". Then put the SHA1 fingerprint in the textbox followed by a semicolon and your project's package name.

Specify permission settings in your project's manifest file

Put the following inside manifest tag in your application manifest file (replace com.example with your project's package name):

  <permission android:name="com.example.permission.MAPS_RECEIVE" android:protectionLevel="signature"/>
  <uses-permission android:name="com.example.permission.MAPS_RECEIVE"/>
  <uses-sdk android:minSdkVersion="8" 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"/>
  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

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

Specify the API key generated from API Console in your project's manifest file

Put this as the last element before closing the application tag

<meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="your api key goes here"/>

Add a map to your project

main.xml

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/map"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  class="com.google.android.gms.maps.SupportMapFragment"/>

Main.java

import android.app.Activity;
import android.os.Bundle;

public class Main extends Activity {

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

Run your application

You should get everything working.

Answer 2

Hi this worked for me:

Remember where you got your api-key? https://code.google.com/apis/console , go there and under Key for Android apps (with certificates) press edit allowed android apps.

In my case the fingerprint refered to an old package in a different project so i just went to the cmd console and got my new fingerprint and typed in my current package name after it an BINGO.