DemoUtils.java

package com.herotculb.tencentmap;

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
import android.util.Log;

import com.tencent.map.geolocation.TencentLocationManager;

/**
 * 一些工具方法.
 * 
 */
public class DemoUtils {

	/**
	 * 返回坐标系名称
	 */
	public static String toString(int coordinateType) {
		if (coordinateType == TencentLocationManager.COORDINATE_TYPE_GCJ02) {
			return "国测局坐标(火星坐标)";
		} else if (coordinateType == TencentLocationManager.COORDINATE_TYPE_WGS84) {
			return "WGS84坐标(GPS坐标, 地球坐标)";
		} else {
			return "非法坐标";
		}
	}

	/**
	 * 返回 manifest 中的 key
	 */
	public static String getKey(Context context) {
		String key = null;
		try {
			ApplicationInfo appInfo = context.getPackageManager()
					.getApplicationInfo(context.getPackageName(),
							PackageManager.GET_META_DATA);
			Bundle metaData = appInfo.metaData;
			if (metaData != null) {
				key = metaData.getString("TencentMapSDK");
			}
		} catch (NameNotFoundException e) {
			Log.e("TencentLocation",
					"Location Manager: no key found in manifest file");
			key = "";
		}
		return key;
	}

}