Google Map View範例

Google Map View範例

下圖Google MapView程式範例執行結果圖，其程式使用Google Map View元件
所撰寫的程式。(與Google Map相似)

圖一-遊戲畫面

以下為Google MapView範例程式碼:
專案下載:MapViewDemo.rar
主程式: MapViewDemo.java

package ccc.MapViewDemo;
 
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
 
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
 
public class MapViewDemo extends MapActivity {
 
    // GoogleMapView元件
    MapView mapView;
 
    // GoogleMapView控制器
    MapController mapController;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
 
        // GoogleMapAPI Key
        String ApiKey = "03rGqE_CW0JtuagXBUsB8Zxijve-Y131pYz1jqA";
        mapView = new MapView(this,ApiKey);
 
        // 設定衛星圖
        mapView.setSatellite(true);
        mapController = mapView.getController();
 
        // 設定經緯度中心、縮放
        GeoPoint point = new GeoPoint(24448541, 118322206);
        mapController.setCenter(point);
        mapController.setZoom(19);
 
        setContentView(mapView);
 
    }
 
    // 選單放大跟縮小索引
    protected static final int MENU_ZoomIn = Menu.FIRST;
    protected static final int MENU_ZoomOut = Menu.FIRST + 1;
 
    // 選單初始化
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0, MENU_ZoomIn, 0, "放大");
        menu.add(0, MENU_ZoomOut, 0, "縮小");
        return super.onCreateOptionsMenu(menu);
    };
 
    // 選單項目選擇
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
 
        switch (item.getItemId()) {
            case MENU_ZoomIn:
                mapController.zoomIn();
                break;
            case MENU_ZoomOut:            
                mapController.zoomOut();
                break;
        }
 
        return super.onOptionsItemSelected(item);
    }
 
    // 觸控事件
    @Override
    public boolean onTouchEvent(MotionEvent event) {
 
        int pointCount = event.getHistorySize();
 
        if (pointCount > 0) {
            float dx = event.getHistoricalX(pointCount - 1)
                    - event.getHistoricalX(0);
            float dy = event.getHistoricalY(pointCount - 1)
                    - event.getHistoricalY(0);
 
            mapController.scrollBy((int) -dx, (int) -dy);
 
        }
 
        return true;
    }
 
    // 鍵盤事件
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
 
        if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) {
            mapController.scrollBy(-10, 0);
        }
        if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) {
            mapController.scrollBy(10, 0);
        }
        if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {
            mapController.scrollBy(0, -10);
        }
        if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
            mapController.scrollBy(0, 10);
        }
 
        return super.onKeyDown(keyCode, event);
    }
 
    @Override
    protected boolean isRouteDisplayed() {
 
        return false;
    }
 
}

AndroidManifest.xml為使用權限:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="ccc.MapViewDemo"
      android:versionCode="1"
      android:versionName="1.0">
 
    <application android:icon="@drawable/icon" android:label="@string/app_name">
 
        <activity android:name=".MapViewDemo"
                  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>
 
    <!-- uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /-->
    <uses-permission android:name="android.permission.INTERNET" />
 
    <uses-sdk android:minSdkVersion="4" />
 
</manifest>

金鑰申請:
此程式的google APIs金鑰申請到網頁Android Maps API Key Signup申請，MD5取得如下圖2-6步驟在cmd中先到Java\jre6\bin目錄下輸入keytool -list -keystore "debug.keystore所在位置(位置在圖2-7中紅色框框中)"之後輸入密碼為"android"就能取得MD5，輸入MD5申請後結果會如圖2-8取得金鑰到此步驟模擬器就能使用金鑰，而手機的金鑰安裝檔為圖2-9到圖2-13其中2-10的Location為debug.keystore所在位置、password輸入"android"，圖2-11中的password如同上述，圖2-12為安裝檔存放位置。

圖2-6

圖2-7

圖2-8

圖2-9

圖2-10

圖2-11

圖2-12