Java代码
package com.hsh.Activity;
import java.net.ContentHandler;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class GpsActivity extends Activity {
private static final String TAG = "GPSTestActivity";
private Location preLocation;
private long preTime;
private static final int step = 2000; // msecs
private static final String Content = null;
private LocationManager locationManager;
private boolean status = false;
private Button btn;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i(TAG, "onCreate(Bundle savedInstanceState)");
btn = (Button) findViewById(R.id.beginBtn);
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (!status) {
status = true;
startLoactionService();
btn.setText("点击这里停止");
} else {
status = false;
stopLocationService();
btn.setText("点击这里开始");
}
}
});
}
public void startLoactionService() {
String serviceName = Context.LOCATION_SERVICE;
//LocationManager locationManager;///
locationManager = (LocationManager) getSystemService(serviceName);
// String provider = LocationManager.GPS_PROVIDER;///
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String provider = locationManager.getBestProvider(criteria, true);
Location location = locationManager.getLastKnownLocation(provider);
updateWithNewLocation(location);///
preTime = System.currentTimeMillis();
updateWithNewLocation(location);
locationManager.requestLocationUpdates(provider, step, 0,
locationListener); //注册一个周期性的位置更新。这句代码告诉系统，我们需要从GPS获取位置信息，并且是每隔1000ms更新一次，并且不考虑位置的变化。最后一个参数是LocationListener的一个引用，我们必须要实现这个类
}
public void stopLocationService() {
if (locationManager != null) {
locationManager.removeUpdates(locationListener);
}
}
private final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) { //当坐标改变时触发此函数，如果Provider传进相同的坐标，它就不会被触发
// log it when the location changes
Log.i(TAG, "onLocationChanged(Location location)");
//Log.i("SuperMap","LocationChange:Lat"+location.getLatitude()+"Lng:"+location.getLongitude());///
updateWithNewLocation(location);
}
public void onProviderDisabled(String provider) {
updateWithNewLocation(null); // Provider被disable时触发此函数，比如GPS被关闭
}
public void onProviderEnabled(String provider) { // Provider被enable时触发此函数，比如GPS被打开
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// Provider的转态在可用、暂时不可用和无服务三个状态直接切换时触发此函数
}
};
private void updateWithNewLocation(Location location) {
Log.i(TAG, "updateWithNewLocation(Location location)");