ANDROID_MARS学习笔记_S03_005_Geocoder、AsyncTask

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

package com.location3; import java.io.IOException;
import java.util.List; import android.app.Activity;
import android.location.Address;
import android.location.Geocoder;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button; public class MainActivity extends Activity {
private Button geocodingButton = null;
private Button reverseGeocodingButton = null; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); geocodingButton = (Button)findViewById(R.id.getLocationButton);
reverseGeocodingButton = (Button)findViewById(R.id.getLocationNameButton); geocodingButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new GeocodingTask().execute(new Integer(1));
}
}); reverseGeocodingButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new ReverseGeocodingTask().execute(new Integer(2));
}
});
} private class GeocodingTask extends AsyncTask<Integer, Integer, Integer> {
@Override
protected Integer doInBackground(Integer... params) {
//创建Geocoder对象，执行相关查询，但是存在未知BUG，导致服务不可用
Geocoder geocoder = new Geocoder(MainActivity.this);
try {
//SFO是美国机场的一个简称
List<Address> addresses = geocoder.getFromLocationName("SFO", 1);
System.out.println("GeocodingTask addresses--->");
for(Address address : addresses) {
System.out.println(address);
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
} private class ReverseGeocodingTask extends AsyncTask<Integer, Integer, Integer> {
@Override
protected Integer doInBackground(Integer... params) {
Geocoder geocoder = new Geocoder(MainActivity.this);
//根据给定的经纬度，查询符合条件的地址
try {
List<Address> addresses = geocoder.getFromLocation(40.711442,-73.961452, 1);
System.out.println("ReverseGeocodingTask addresses -->");
for(Address address : addresses) {
System.out.println(address);
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
}