GPS原始经纬度转百度经纬度

 1 protected void runTest() throws Throwable {
 2  
 3     try {
 4         BaiduLocation bl = new BaiduLocation();
 5             bl.gpsx = 120;//经度
 6             bl.gpsy = 30;//纬度
 7             GetBaiduLocation(bl);
 8             if(bl.ok) {
 9                 int baidux = (int)(bl.baidux*1E6);
10                 int baiduy = (int)(bl.baiduy*1E6);
11                 // 转换成功，这个坐标是百度专用的
12             }
13             else {
14                 /// 转换失败
15             }
16     }
17     catch(Exception ex) {
18     }
19 }
20  
21 class BaiduLocation {
22     public float gpsx, gpsy;
23     public float baidux, baiduy;
24     public boolean ok = false;
25 }
26  
27 public static String GetBaiduLocation(float x, float y) throws MalformedURLException, IOException {
28     String url = String.format("http://api.map.baidu.com/ag/coord/convert?from=0&to=4&x=%f&y=%f", x, y);
29     HttpURLConnection urlConnection = (HttpURLConnection)(new URL(url).openConnection());
30     urlConnection.connect();
31     BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
32     String lines = reader.readLine();
33     reader.close(); 
34     urlConnection.disconnect();
35     return lines;
36 }   
37  
38 public static boolean GetBaiduLocation(BaiduLocation bl) {
39     try {
40         bl.ok = false;
41         String res = GetBaiduLocation(bl.gpsx, bl.gpsy);
42         if(res.startsWith("{") && res.endsWith("}")) {
43             res = res.substring(1, res.length() - 2).replace("\"", "");
44             String[] lines = res.split(",");
45             for(String line : lines) {
46                 String[] items = line.split(":");
47                 if(items.length == 2) {
48                     if("error".equals(items[0])) {
49                         bl.ok = "0".equals(items[1]);
50                     }
51                     if("x".equals(items[0])) {
52                         bl.baidux = ConvertBase64(items[1]);
53                     }
54                     if("y".equals(items[0])) {
55                         bl.baiduy = ConvertBase64(items[1]);
56                     }
57                 }
58             }
59         }
60     } catch (Exception e) {
61         bl.ok = false;
62     } 
63     return bl.ok;   
64 }
65 private static float ConvertBase64(String str) {
66     byte[] bs = Base64.decode(str);       
67     return Float.valueOf(new String(bs));
68 }