google 地图View 用法

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;

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



	@Override
	protected boolean isRouteDisplayed() {
		// TODO Auto-generated method stub
		return 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 emulator
		overlay.runOnFirstFix(new Runnable() {
			public void run() {
				// Zoom in to current location
				controller.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.MapView
        android: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-sdk
        android: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" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar" >
        <activity
            android: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: