获取Gps定位信息，Android源码实例

package ayh.mygps; import java.util.Date; //Download by http://www.codefans.net import android.app.Activity; import android.content.Context; import android.location.Criteria; //import android.location.GpsStatus; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.text.format.DateFormat; import android.text.TextUtils; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class mainatt extends Activity implements OnClickListener { private LocationManager lm; private Location loc; private Criteria ct; private String provider; private TextView tvLatitude; private TextView tvLongitude; private TextView tvHigh; private TextView tvDirection; private TextView tvSpeed; private TextView tvGpsTime; private TextView tvInfoType; private EditText etSetTimeSpace; private Button btnmanual; private Button btnsettimespace; private Button btnexit; private DBGps dbgps = new DBGps(this); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tvLatitude = (TextView) findViewById(R.id.tvlatitude); tvLongitude = (TextView) findViewById(R.id.tvlongitude); tvHigh = (TextView) findViewById(R.id.tvhigh); tvDirection = (TextView) findViewById(R.id.tvdirection); tvSpeed = (TextView) findViewById(R.id.tvspeed); tvGpsTime = (TextView) findViewById(R.id.tvgpstime); tvInfoType = (TextView) findViewById(R.id.tvinfotype); etSetTimeSpace = (EditText) findViewById(R.id.ettimespace); btnmanual = (Button) findViewById(R.id.btnmanual); btnmanual.setOnClickListener(this); btnsettimespace = (Button) findViewById(R.id.btnsettimespace); btnsettimespace.setOnClickListener(this); btnexit = (Button) findViewById(R.id.btnexit); btnexit.setOnClickListener(this); dbgps.openDB(); initLocation(); } //Download by http://www.codefans.net private final LocationListener locationListener = new LocationListener() { @Override public void onLocationChanged(Location arg0) { showInfo(getLastPosition(), 2); } @Override public void onProviderDisabled(String arg0) { showInfo(null, -1); } @Override public void onProviderEnabled(String arg0) { } @Override public void onStatusChanged(String arg0, int arg1, Bundle arg2) { } }; private void initLocation() { lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); if (lm.isProviderEnabled(LocationManager.GPS_PROVIDER)) { ct = new Criteria(); ct.setAccuracy(Criteria.ACCURACY_FINE);// 高精度 ct.setAltitudeRequired(true);// 显示海拔 ct.setBearingRequired(true);// 显示方向 ct.setSpeedRequired(true);// 显示速度 ct.setCostAllowed(false);// 不允许有花费 ct.setPowerRequirement(Criteria.POWER_LOW);// 低功耗 provider = lm.getBestProvider(ct, true); // 位置变化监听,默认5秒一次,距离10米以上 lm.requestLocationUpdates(provider, 5000, 10, locationListener); } else showInfo(null, -1); } private gpsdata getLastPosition() { gpsdata result = new gpsdata(); loc = lm.getLastKnownLocation(provider); if (loc != null) { result.Latitude = (int) (loc.getLatitude() * 1E6); result.Longitude = (int) (loc.getLongitude() * 1E6); result.High = loc.getAltitude(); result.Direct = loc.getBearing(); result.Speed = loc.getSpeed(); Date d = new Date(); d.setTime(loc.getTime() + 28800000);// UTC时间,转北京时间+8小时 result.GpsTime = DateFormat.format("yyyy-MM-dd kk:mm:ss", d).toString(); d = null; } return result; } private void showInfo(gpsdata cdata, int infotype) { if (cdata == null) { if (infotype == -1) { tvLatitude.setText("GPS功能已关闭"); tvLongitude.setText(""); tvHigh.setText(""); tvDirection.setText(""); tvSpeed.setText(""); tvGpsTime.setText(""); tvInfoType.setText(""); btnmanual.setEnabled(false); btnsettimespace.setEnabled(false); etSetTimeSpace.setEnabled(false); } } else { tvLatitude.setText(String.format("纬度:%d", cdata.Latitude)); tvLongitude.setText(String.format("经度:%d", cdata.Longitude)); tvHigh.setText(String.format("海拔:%f", cdata.High)); tvDirection.setText(String.format("方向:%f", cdata.Direct)); tvSpeed.setText(String.format("速度:%f", cdata.Speed)); tvGpsTime.setText(String.format("GPS时间:%s", cdata.GpsTime)); cdata.InfoType = infotype; switch (infotype) { case 1: tvInfoType.setText("信息来源状态:手动获取更新"); break; case 2: tvInfoType.setText("信息来源状态:位置改变更新"); break; /* * case 3: tvInfoType.setText("信息来源状态:位置改变更新"); break; */ } dbgps.addGpsData(cdata); } } @Override public void onClick(View v) { if (v.equals(btnmanual)) { showInfo(getLastPosition(), 1); } if (v.equals(btnsettimespace)) { if (TextUtils.isEmpty(etSetTimeSpace.getText().toString())) { Toast.makeText(this, "请输入更新时间间隔", Toast.LENGTH_LONG).show(); etSetTimeSpace.requestFocus(); return; } int timespace = Integer.valueOf(etSetTimeSpace.getText().toString()) * 1000; if (lm.isProviderEnabled(LocationManager.GPS_PROVIDER)) lm.requestLocationUpdates(provider, timespace, 10, locationListener); } if (v.equals(btnexit)) android.os.Process.killProcess(android.os.Process.myPid()); } @Override protected void onDestroy() { if (dbgps != null) { dbgps.closeDB(); dbgps = null; } super.onDestroy(); } }