如何把JSON lOutput（纬度和经度）在地图上 [英] How to put JSON lOutput (latitude and longitude) on the map
本文介绍了如何把JSON lOutput（纬度和经度）在地图上的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个主要活动从我的MySQL解析JSON数据（表追踪：Lattitude和纬度）现在，我想通过这个数据，我MapActivity并显示在谷歌地图。任何帮助是非常AP preciated。谢谢！
I have a main activity which parses the JSON data from my mysql (table tracking:Lattitude and longitude) Now I want to pass this data in to my MapActivity and display on google maps. Any help is highly appreciated. Thanks!
这我JSONactivity
this my JSONactivity
public class JSONActivity extends Activity{
private JSONObject jObject;
private String xResult ="";
//Seusuaikan url dengan nama domain
private String url = "http://10.0.2.2/labiltrack/daftartracking.php";
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.daftartrack);
TextView txtResult = (TextView)findViewById(R.id.TextViewResult);
//url += "?lattitude=" + UserData.getEmail();
xResult = getRequest(url);
try {
parse(txtResult);
} catch (Exception e) {
e.printStackTrace();
}
}
private void parse(TextView txtResult) throws Exception {
// TODO Auto-generated method stub
jObject = new JSONObject(xResult);
JSONArray menuitemArray = jObject.getJSONArray("joel");
String sret="";
//int j = 0;
for (int i = 0; i < menuitemArray.length(); i++) {
sret +=menuitemArray.getJSONObject(i).
getString("lattitude").toString()+" : ";
System.out.println(menuitemArray.getJSONObject(i)
.getString("lattitude").toString());
System.out.println(menuitemArray.getJSONObject(i).getString(
"longitude").toString());
sret +=menuitemArray.getJSONObject(i).getString(
"lattitude").toString()+"\n";
//j=i;
}txtResult.setText(sret);
}
/**
* Method untuk Mengirimkan data keserver
* event by button login diklik
*
* @param view
*/
private String getRequest(String url) {
// TODO Auto-generated method stub
String sret="";
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(url);
try{
HttpResponse response = client.execute(request);
sret =request(response);
}catch(Exception ex){
Toast.makeText(this,"jo "+sret, Toast.LENGTH_SHORT).show();
}
return sret;
}
/**
* Method untuk Menenrima data dari server
* @param response
* @return
*/
private String request(HttpResponse response) {
// TODO Auto-generated method stub
String result = "";
try{
InputStream in = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null){
str.append(line + "\n");
}
in.close();
result = str.toString();
}catch(Exception ex){
result = "Error";
}
return result;
}
}
和本我mapActivity
and this my mapActivity
public class mapactivity extends MapActivity {
private MapView mapView;
MapController mc;
GeoPoint p;
//private MyLocationOverlay me = null;
class MapOverlays extends com.google.android.maps.Overlay
{
@Override
public boolean draw (Canvas canvas, MapView mapView, boolean shadow, long when)
{
super.draw(canvas, mapView, shadow);
//translate the geopoint to screen pixels
Point screenPts = new Point();
mapView.getProjection().toPixels(p, screenPts);
//tambah marker
Bitmap bmp = BitmapFactory.decodeResource(getResources (), R.drawable.pin_red);
canvas.drawBitmap(bmp, screenPts.x, screenPts.y-50, null);
//mapView.setSatellite(true);
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
//---when user lifts his finger---
if (event.getAction() == 1) {
GeoPoint p = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Toast.makeText(getBaseContext(),
p.getLatitudeE6() / 1E6 + "," +
p.getLongitudeE6() /1E6 ,
Toast.LENGTH_SHORT).show();
mc.animateTo(p);
//geocoding
Geocoder geoCoder = new Geocoder(
getBaseContext(), Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocation(
p.getLatitudeE6() / 1E6,
p.getLongitudeE6() / 1E6, 1);
String add = "";
if (addresses.size() > 0)
{
for (int i=0; i<addresses.get(0).getMaxAddressLineIndex();
i++)
add += addresses.get(0).getAddressLine(i) + "\n";
}
Toast.makeText(getBaseContext(), add, Toast.LENGTH_SHORT).show();
}
catch (IOException e) {
e.printStackTrace();
}
return true;
}
else
return false;
} }
/** Called when the activity is first created. */
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mapview1);
//utk mnampilkan zoom
mapView = (MapView) findViewById(R.id.mapView);
LinearLayout zoomLayout = (LinearLayout)findViewById(R.id.zoom);
View zoomView = mapView.getZoomControls();
zoomLayout.addView(zoomView,
new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT));
mapView.displayZoomControls(true);
//menampilkan default peta banda aceh
mc = mapView.getController();
String coordinates[] = {"5.550381", "95.318699"};
double lat = Double.parseDouble(coordinates[0]);
double lng = Double.parseDouble(coordinates[1]);
p = new GeoPoint(
(int) (lat * 1E6),
(int) (lng * 1E6));
mc.animateTo(p);
mc.setZoom(14);
mapView.invalidate();
//tambah marker
MapOverlays mapOverlay = new MapOverlays();
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
}
public void btnSatelitClick(View v){
mapView.setSatellite(true);
mapView.setStreetView(false);
}
public void btnjalanClick (View v){
mapView.setSatellite(false);
mapView.setStreetView(true);
}
protected boolean isRouteDisplayed()
{
//auto generate method
return false;
}
}
我jsonactivity是从MySQL（场纬度和经度）进入列表视图中获取数据，但现在我想显示的数据在谷歌地图（经度和纬度），我怎么能这样做？ 请帮帮我，先谢谢了！
my jsonactivity is get data from mysql (field "latitude" and "longitude") into listview, but now I want to display that data (latitude and longitude) on google map, How Could I do this ? please help me, thanks in advance !
推荐答案
您需要从另一个类获得包：这个类将是你的 mapActivity
You need to get bundle from another class : this class will be for your mapActivity
Bundle b = getIntent().getExtras(); // Getting the Bundle object that pass from another activity
int SelectedPropertylat = b.getInt("SelectedLat");
int SelectedPropertylong = b.getInt("SelectedLong");
String lattitude = Integer.toString(SelectedPropertylat);
String longertude = Integer.toString(SelectedPropertylong);
Log.d(lattitude,longertude);
和采取datafrom的MySQL到您的应用程序使用这样的：
And taking datafrom mysql into your apps use this :
try{
JSONArray earthquakes = json.getJSONArray("PropertyDetails");
for(int i=0;i<earthquakes.length();i++){
JSONObject e = earthquakes.getJSONObject(i);
lat = e.getString("P_Lat");
lonng = e.getString("P_Long");
然后将其转换纬度和长到像一个字符串：
then convert lat and long into an string like :
lonnng = Integer.parseInt(lonng.toString());
latt =Integer.parseInt(lat.toString());
然后将数据传递到您的图形页面是这样的：
then pass the data into your mapview like this :
Intent moreDetailsIntent = new Intent(PropertiesDetails.this,mapActivity .class);
Bundle dataBundle = new Bundle();
dataBundle.putInt("SelectedLong",lonnng);
dataBundle.putInt("SelectedLat", latt);
moreDetailsIntent.putExtras(dataBundle);
startActivity(moreDetailsIntent);
这篇关于如何把JSON lOutput（纬度和经度）在地图上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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