通过GPS取得的是一个Location类型的经纬度， 可以转换为两个Double 纬度和经度.
纬度: 23.223871812820435
纬度: 113.58986039161628
首先创建一个TextView和两个Button
<TextView android:id="@+id/text" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <Button android:id="@+id/btnStart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="定位" /> <Button android:id="@+id/btnStop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止" />
然后添加主Activity的代码
Location 是存放经纬度的一个类型
LocationManager是位置管理服务类型
private Button btnStart; private Button btnStop; private TextView textView; private Location mLocation; private LocationManager mLocationManager; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btnStart = (Button)findViewById(R.id.btnStart); btnStop = (Button)findViewById(R.id.btnStop); textView = (TextView)findViewById(R.id.text); btnStart.setOnClickListener(btnClickListener); //开始定位 btnStop.setOnClickListener(btnClickListener); //结束定位按钮 } gpsIsOpen是自己写的查看当前GPS是否开启 getLocation 是自己写的一个获取定位信息的方法 mLocationManager.removeUpdates()是停止当前的GPS位置监听 public Button.OnClickListener btnClickListener = new Button.OnClickListener() { public void onClick(View v) { Button btn = (Button)v; if(btn.getId() == R.id.btnStart) { if(!gpsIsOpen()) return; mLocation = getLocation(); if(mLocation != null) textView.setText("维度:" + mLocation.getLatitude() + "n经度:" + mLocation.getLongitude()); else textView.setText("获取不到数据"); } else if(btn.getId() == R.id.btnStop) { mLocationManager.removeUpdates(locationListener); } } }; private boolean gpsIsOpen() { boolean bRet = true; LocationManager alm = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE); if(!alm.isProviderEnabled(LocationManager.GPS_PROVIDER)) { Toast.makeText(this, "未开启GPS", Toast.LENGTH_SHORT).show(); bRet = false; } else { Toast.makeText(this, "GPS已开启", Toast.LENGTH_SHORT).show(); } return bRet; } 判断当前是否开启GPS private boolean gpsIsOpen() { boolean bRet = true; LocationManager alm = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE); if(!alm.isProviderEnabled(LocationManager.GPS_PROVIDER)) { Toast.makeText(this, "未开启GPS", Toast.LENGTH_SHORT).show(); bRet = false; } else { Toast.makeText(this, "GPS已开启", Toast.LENGTH_SHORT).show(); } return bRet; } 该方法获取当前的经纬度， 第一次获取总是null 后面从LocationListener获取已改变的位置 mLocationManager.requestLocationUpdates()是开启一个LocationListener等待位置变化 private Location getLocation() { //获取位置管理服务 mLocationManager = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE); //查找服务信息 Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); //定位精度: 最高 criteria.setAltitudeRequired(false); //海拔信息：不需要 criteria.setBearingRequired(false); //方位信息: 不需要 criteria.setCostAllowed(true); //是否允许付费 criteria.setPowerRequirement(Criteria.POWER_LOW); //耗电量: 低功耗 String provider = mLocationManager.getBestProvider(criteria, true); //获取GPS信息 Location location = mLocationManager.getLastKnownLocation(provider); mLocationManager.requestLocationUpdates(provider, 2000, 5, locationListener); return location; } 改方法是等待GPS位置改变后得到新的经纬度 private final LocationListener locationListener = new LocationListener() { public void onLocationChanged(Location location) { // TODO Auto-generated method stub if(location != null) textView.setText("维度:" + location.getLatitude() + "n经度:" + location.getLongitude()); else textView.setText("获取不到数据" + Integer.toString(nCount)); } public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } };
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