package basic.android.lesson26;
import android.app.Activity;
import android.content.Context;
import android.location.Criteria;
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.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
      TextView tv1;
      Location location;
      @Override
      public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            // 定义UI组件
            Button b1 = (Button) findViewById(R.id.button1);
            tv1 = (TextView) findViewById(R.id.textView1);
            // 获取LocationManager对象
            LocationManager lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
            // 定义Criteria对象
            Criteria criteria = new Criteria();
            // 设置定位精确度 Criteria.ACCURACY_COARSE 比较粗略， Criteria.ACCURACY_FINE则比较精细
            criteria.setAccuracy(Criteria.ACCURACY_FINE);
            // 设置是否需要海拔信息 Altitude
            criteria.setAltitudeRequired(true);
            // 设置是否需要方位信息 Bearing
            criteria.setBearingRequired(true);
            // 设置是否允许运营商收费
            criteria.setCostAllowed(true);
            // 设置对电源的需求
            criteria.setPowerRequirement(Criteria.POWER_LOW);
            // 获取GPS信息提供者
            String bestProvider = lm.getBestProvider(criteria, true);
            Log.i("yao", "bestProvider = " + bestProvider);
            // 获取定位信息
            location = lm.getLastKnownLocation(bestProvider);
            // 给按钮绑定点击监听器
            b1.setOnClickListener(new View.OnClickListener() {
                  @Override
                  public void onClick(View v) {
                        updateLocation(location);
                  }
            });
            // 位置监听器
            LocationListener locationListener = new LocationListener() {
                  // 当位置改变时触发
                  @Override
                  public void onLocationChanged(Location location) {
                        Log.i("yao", location.toString());
                        updateLocation(location);
                  }
                  // Provider失效时触发
                  @Override
                  public void onProviderDisabled(String arg0) {
                        Log.i("yao", arg0);
                  }
                  // Provider可用时触发
                  @Override
                  public void onProviderEnabled(String arg0) {
                        Log.i("yao", arg0);
                  }
                  // Provider状态改变时触发
                  @Override
                  public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
                        Log.i("yao", "onStatusChanged");
                  }
            };
            // 500毫秒更新一次，忽略位置变化
            lm.requestLocationUpdates(bestProvider, 500, 0, locationListener);
      }
      // 更新位置信息
      private void updateLocation(Location location) {
      if (location != null) {

+ location.getLatitude());
} else {
      Log.i("yao", "没有获取到定位对象Location");
}
}
}

<!-- 粗略定位授权 -->
<uses -permission="" android:name="android.permission.ACCESS_COARSE_LOCATION"></uses>
<!-- 精细定位授权 -->
<uses -permission="" android:name="android.permission.ACCESS_FINE_LOCATION"></uses>
<!-- 模拟定位授权 -->
<uses -permission="" android:name="android.permission.ACCESS_MOCK_LOCATION"></uses>
<!-- 网络访问授权 -->
<uses -permission="" android:name="android.permission.INTERNET"></uses>