activity 代码

package com.example.mapview;import android.os.Bundle;
import android.view.Menu;import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;public class MainActivity extends MapActivity {private MapView map;private MapController controller;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initMapView();initMyLocation();}@Overrideprotected boolean isRouteDisplayed() {// TODO Auto-generated method stubreturn false;}private void initMapView() {map = (MapView) findViewById(R.id.map);controller = map.getController();map.setSatellite(true);map.setBuiltInZoomControls(true);}/** Start tracking the position on the map. */private void initMyLocation() {final MyLocationOverlay overlay = new MyLocationOverlay(this, map);overlay.enableMyLocation();// overlay.enableCompass(); // does not work in emulatoroverlay.runOnFirstFix(new Runnable() {public void run() {// Zoom in to current locationcontroller.setZoom(8);controller.animateTo(overlay.getMyLocation());}});map.getOverlays().add(overlay);}
}

activity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/frame"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><com.google.android.maps.MapViewandroid:id="@+id/map"android:layout_width="fill_parent"android:layout_height="fill_parent"android:apiKey="AIzaSyAapz0Y7u-51kc9BIi1SfxN3XaAOSUBlwY"android:clickable="true" /></LinearLayout>

main.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.example.mapview"android:versionCode="1"android:versionName="1.0" ><uses-sdkandroid:minSdkVersion="11"android:targetSdkVersion="17" /><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /><uses-permission android:name="android.permission.INTERNET" /><applicationandroid:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@android:style/Theme.NoTitleBar" ><activityandroid:name="com.example.mapview.MainActivity"android:label="@string/app_name" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><uses-library android:name="com.google.android.maps" /></application></manifest>

google map开发不显示地图，只有灰色网格 ?

很可能就是 GOOGLE MAPS API KEY 的问题，我前几天遇到的情况和lz一样，换了key就可以正常显示了。。

用的的jar包: