我怎样才能从地址找到经纬度？

我想在谷歌地图中显示一个地址的位置。

如何使用谷歌地图 API 获取地址的经纬度？

190665 次浏览
小开
最佳答案 
public GeoPoint getLocationFromAddress(String strAddress) {


Geocoder coder = new Geocoder(this);
List<Address> address;
GeoPoint p1 = null;


try {
address = coder.getFromLocationName(strAddress, 5);
if (address == null) {
return null;
}
Address location = address.get(0);
location.getLatitude();
location.getLongitude();


p1 = new GeoPoint((double) (location.getLatitude() * 1E6),
(double) (location.getLongitude() * 1E6));


return p1;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

strAddress是包含地址的字符串。 address变量保存转换后的地址。

小开

这样你就可以在地图上找到我们点击的经纬度。

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();
}
return false;
}

效果很好。

为了得到位置的地址，我们可以使用地理编码器类。

小开

If you want to place your address in google map then easy way to use following

Intent searchAddress = new  Intent(Intent.ACTION_VIEW,Uri.parse("geo:0,0?q="+address));
startActivity(searchAddress);

或者

如果你需要从你的地址得到拉特长，然后使用 Google Place Api以下

创建一个返回具有 HTTP 呼叫响应的 JSONObject的方法，如下所示

public static JSONObject getLocationInfo(String address) {
StringBuilder stringBuilder = new StringBuilder();
try {


address = address.replaceAll(" ","%20");


HttpPost httppost = new HttpPost("http://maps.google.com/maps/api/geocode/json?address=" + address + "&sensor=false");
HttpClient client = new DefaultHttpClient();
HttpResponse response;
stringBuilder = new StringBuilder();




response = client.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream stream = entity.getContent();
int b;
while ((b = stream.read()) != -1) {
stringBuilder.append((char) b);
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}


JSONObject jsonObject = new JSONObject();
try {
jsonObject = new JSONObject(stringBuilder.toString());
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


return jsonObject;
}

现在将 JSONObject传递给 getLatLong ()方法，如下所示

public static boolean getLatLong(JSONObject jsonObject) {


try {


longitute = ((JSONArray)jsonObject.get("results")).getJSONObject(0)
.getJSONObject("geometry").getJSONObject("location")
.getDouble("lng");


latitude = ((JSONArray)jsonObject.get("results")).getJSONObject(0)
.getJSONObject("geometry").getJSONObject("location")
.getDouble("lat");


} catch (JSONException e) {
return false;


}


return true;
}

I hope this helps to you nd others..!! 谢谢！

小开

The following code will work for google apiv2:

public void convertAddress() {
if (address != null && !address.isEmpty()) {
try {
List<Address> addressList = geoCoder.getFromLocationName(address, 1);
if (addressList != null && addressList.size() > 0) {
double lat = addressList.get(0).getLatitude();
double lng = addressList.get(0).getLongitude();
}
} catch (Exception e) {
e.printStackTrace();
} // end catch
} // end if
} // end convertAddress

其中地址是要转换为 LatLng 的 String (123 TestingRd City State zip)。

小开

Kandha 问题的答案如下:

它抛出“ java.io.IOException 服务不可用” 我已经给了那些许可，包括图书馆... 我可以得到地图视图... 它抛出的 IOException 在地理编码器..。

我只是在尝试之后添加了 catch IOException，它就解决了问题

    catch(IOException ioEx){
return null;
}
小开

更新 API 的 Ud _ an 解决方案

注意 : 拉丁类是 Google Play Services 的一部分。

强制性:

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>


<uses-permission android:name="android.permission.INTERNET"/>

更新: 如果您有目标 SDK 23及以上，请确保您已经考虑了位置的运行时权限。

public LatLng getLocationFromAddress(Context context,String strAddress) {


Geocoder coder = new Geocoder(context);
List<Address> address;
LatLng p1 = null;


try {
// May throw an IOException
address = coder.getFromLocationName(strAddress, 5);
if (address == null) {
return null;
}


Address location = address.get(0);
p1 = new LatLng(location.getLatitude(), location.getLongitude() );


} catch (IOException ex) {


ex.printStackTrace();
}


return p1;
}
小开 
Geocoder coder = new Geocoder(this);
List<Address> addresses;
try {
addresses = coder.getFromLocationName(address, 5);
if (addresses == null) {
}
Address location = addresses.get(0);
double lat = location.getLatitude();
double lng = location.getLongitude();
Log.i("Lat",""+lat);
Log.i("Lng",""+lng);
LatLng latLng = new LatLng(lat,lng);
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
googleMap.addMarker(markerOptions);
googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,12));
} catch (IOException e) {
e.printStackTrace();
}
小开 
public void goToLocationFromAddress(String strAddress) {
//Create coder with Activity context - this
Geocoder coder = new Geocoder(this);
List<Address> address;


try {
//Get latLng from String
address = coder.getFromLocationName(strAddress, 5);


//check for null
if (address != null) {


//Lets take first possibility from the all possibilities.
try {
Address location = address.get(0);
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());


//Animate and Zoon on that map location
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(15));
} catch (IndexOutOfBoundsException er) {
Toast.makeText(this, "Location isn't available", Toast.LENGTH_SHORT).show();
}


}




} catch (IOException e) {
e.printStackTrace();
}
}
小开 
public LatLang getLatLangFromAddress(String strAddress){
Geocoder coder = new Geocoder(this, Locale.getDefault());
List<Address> address;
try {
address = coder.getFromLocationName(strAddress,5);
if (address == null) {
return new LatLang(-10000, -10000);
}
Address location = address.get(0);
return new LatLang(location.getLatitude(), location.getLongitude());
} catch (IOException e) {
return new LatLang(-10000, -10000);
}
}

在本例中，LatLang是一个 pojo 类。

不需要 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />许可。

小开

我知道我已经来不及回答这个10年前的问题了，在2021年。下面的代码是完整的工作代码。

Activity _ main. xml 的代码:-

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">


<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enter Address"
android:id="@+id/addressTV"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_alignParentStart="true" />


<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/addressET"
android:layout_alignParentTop="true"
android:layout_toEndOf="@+id/addressTV"
android:singleLine="true"
android:hint="1600 Pennsylvania Ave NW Washington DC 20502" />


<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Lat/Long"
android:id="@+id/addressButton"
android:layout_below="@+id/addressTV"
android:layout_toEndOf="@+id/addressTV"
android:layout_marginTop="50dp" />


<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text=""
android:id="@+id/latLongTV"
android:layout_centerVertical="true"
android:layout_toEndOf="@+id/addressTV" />

AndroidManifest.xml 给予以下许可:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

MainActivity.java

public class MainActivity extends Activity {
Button addressButton;
TextView addressTV;
TextView latLongTV;
EditText addressET;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);


setContentView(R.layout.activity_main);


addressET = findViewById(R.id.addressET);
addressTV = (TextView) findViewById(R.id.addressTV);
latLongTV = (TextView) findViewById(R.id.latLongTV);


addressButton = (Button) findViewById(R.id.addressButton);
addressButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {




String address = addressET.getText().toString();


GeocodingLocation locationAddress = new GeocodingLocation();
locationAddress.getAddressFromLocation(address,
getApplicationContext(), new GeocoderHandler());




           

}
});


}


private class GeocoderHandler extends Handler {
@Override
public void handleMessage(Message message) {
String address;
switch (message.what) {
case 1:
Bundle bundle = message.getData();
address = bundle.getString("address");
break;
default:
address = null;
}
latLongTV.setText(address);
}
}

}

地理编码定位

public class GeocodingLocation {






public static void getAddressFromLocation(String locationAddress, Context context,  Handler handler) {
Thread thread = new Thread() {
@Override
public void run() {
Geocoder geocoder = new Geocoder(context, Locale.getDefault());
String result = null;


try {
List addressList = geocoder.getFromLocationName(locationAddress,1);
if (addressList != null && addressList.size() > 0){
Address address = (Address) addressList.get(0);
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(address.getLatitude()).append("\n");
stringBuilder.append(address.getLongitude()).append("\n");
result = stringBuilder.toString();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
Message message = Message.obtain();
message.setTarget(handler);
if (result != null){
message.what = 1;
Bundle bundle = new Bundle();
result = "Address   :   "+locationAddress+
"\n\n\nLatitude and longitude\n"+result;
bundle.putString("address",result);
message.setData(bundle);
}
message.sendToTarget();
}
}
};
thread.start();
}

}

小开 
 yourButton.setOnClickListener {
AppUtil.hideSoftKeyboard(this)
if (yourEdittext.text.isNotEmpty()) {
var location: LatLng? = null
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
val coder = Geocoder(this@WeatherMapActivity)
coder.getFromLocationName(yourEdittext.text.toString(), 5,object :Geocoder.GeocodeListener{
override fun onGeocode(addresses: MutableList<Address>) {
addresses.forEach {
//do your work android 13
Log.d("locationFRR", "onGeocode: ${it.latitude}")
Log.d("locationFRR", "onGeocode: ${it.longitude}")
location = LatLng(it.latitude, it.longitude)
}


location?.let {
Log.d("locationFRR", "onCreate: ${it.latitude}")
Log.d("locationFRR", "onCreate: ${it.longitude}")
getWeather(it.latitude.toString(), it.longitude.toString())
}
}


override fun onError(errorMessage: String?) {
super.onError(errorMessage)
Log.d("locationFRR", "onError: $errorMessage")
Toast.makeText(
this@WeatherMapActivity,
"City not found",
Toast.LENGTH_SHORT
).show()
}
})


} else {
//less than Android 13
//using Coroutine to avoid ANRs


GlobalScope.launch(Dispatchers.IO) {
location =
getLocationFromAddress(yourEdittext.text.toString())
withContext(Dispatchers.Main) {
location?.let {
Log.d("locationFRR", "onCreate: ${it.latitude}")
Log.d("locationFRR", "onCreate: ${it.longitude}")
getWeather(it.latitude.toString(), it.longitude.toString())
} ?: run {
Toast.makeText(
this@WeatherMapActivity,
"City not found",
Toast.LENGTH_SHORT
).show()
}
}
}


}


}
}


private fun getLocationFromAddress(strAddress: String): LatLng? {
val coder = Geocoder(this)
var p1: LatLng? = null
try {
val address: MutableList<Address>? = coder.getFromLocationName(strAddress, 5)


address?.let {
if (it.size > 0) {




address[0].let { add ->
p1 = LatLng(
(add.latitude),
(add.longitude)
)
}


}


Log.d("locationFRR", "getLocationFromAddress: $p1")
}


} catch (e: IOException) {
e.printStackTrace()
Log.d("locationFRR", "getLocationFromAddress: ${e.message}")
}
return p1
}

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