【发布时间】：2014-03-03 03:49:33
【问题描述】：
我想创建一个获取位置地址的应用程序。我确实参考了一些教程，但响应是 Geocoder 不存在。我需要做后端服务吗？如果是怎么办？
这是代码：
package com.example.locationsample;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
Button getloc;
TextView lati;
TextView longi;
TextView address;
LocationManager location_manager;
String getLatitude;
String getLongitude;
double x;
double y;
Geocoder geocoder;
List<Address> addresses;
Location loc;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getloc = (Button) findViewById(R.id.getlocation);
lati = (TextView) findViewById(R.id.latitude);
longi = (TextView) findViewById(R.id.longitude);
address = (TextView) findViewById(R.id.address);
location_manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
getloc.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
LocationListener listner = new MyLocationListner();
location_manager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 0, 0, listner);
}
});
}
public class MyLocationListner implements LocationListener{
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@SuppressWarnings("static-access")
@Override
public void onLocationChanged(Location arg0) {
// TODO Auto-generated method stub
getLatitude = "" + arg0.getLatitude();
getLongitude = "" + arg0.getLongitude();
lati.setText(getLatitude);
longi.setText(getLongitude);
x = arg0.getLatitude();
y = arg0.getLongitude();
try {
geocoder = new Geocoder(MainActivity.this, Locale.ENGLISH);
addresses = geocoder.getFromLocation(x, y, 1);
StringBuilder str = new StringBuilder();
if (geocoder.isPresent()) {
Toast.makeText(getApplicationContext(),
"geocoder present", Toast.LENGTH_SHORT).show();
Address returnAddress = addresses.get(0);
String localityString = returnAddress.getLocality();
String city = returnAddress.getCountryName();
String region_code = returnAddress.getCountryCode();
String zipcode = returnAddress.getPostalCode();
str.append(localityString + "");
str.append(city + "" + region_code + "");
str.append(zipcode + "");
address.setText(str);
Toast.makeText(getApplicationContext(), str,
Toast.LENGTH_SHORT).show();
} else {
Log.e("y klaro","ndai ini");
Toast.makeText(getApplicationContext(),
"geocoder not present", Toast.LENGTH_SHORT).show();
}
// } else {
// Toast.makeText(getApplicationContext(),
// "address not available", Toast.LENGTH_SHORT).show();
// }
} catch (IOException e) {
// TODO Auto-generated catch block
Log.e("tag", e.getMessage());
}
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
} }
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.locationsample"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.locationsample.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
【问题讨论】：
-
@kedarnath 没有错误，但它不会返回任何地址。我想知道为什么。？我读了一些文章，如果地理编码器没有响应，则有后端服务，我不知道它是什么，我真的需要帮助。
-
好的，你得到纬度值了吗？
-
@Kedarnath 在真实手机中没有，但在模拟器中它很好，因为我在 ddms 中发送纬度和经度。
-
在你的两个 Toast 中，是否显示任何一个？
-
@Kedarnath 在真实手机中没有，但在模拟器中是的，其中一个 toast 正在显示，但它转到 else 语句 Geocoder not present 。
标签： android geolocation location google-geocoder