我是新的Android开发者..我正在制作基于位置的提醒应用，但地图未显示。
这是错误。 请告诉我如何获取API密钥以及放置...
-1943/com.app.locationreminder E/b: Authentication failed on the server.
04-22 10:02:57.530 1121-1943/com.app.locationreminder E/Google Maps Android API: Authorization failure. Please see https://developers.google.com/maps/documentation/android/start for how to correctly set up the map.
04-22 10:02:57.535 1121-1943/com.app.locationreminder E/Google Maps Android API: In the Google Developer Console (https://console.developers.google.com)
Ensure that the "Google Maps Android API v2" is enabled.
Ensure that the following Android Key exists:
API Key: AIzaSyAv3T4PkWMNcHl2KOvmZ4z9o9xCcg6oO9Y
Android Application (<cert_fingerprint>;<package_name>): 0D:A3:D8:83:15:59:D7:61:D4:0D:28:62:3E:C1:48:07:24:81:7B:E0;com.app.locationreminder`