简单实现安卓里百度地图持续定位

package com.example.andoridloca;import java.util.List;import java.util.Timer;import java.util.TimerTask;import android.app.Activity;import android.content.ContentValues;import android.content.Intent;import android.database.Cursor;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.text.method.ScrollingMovementMethod;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import com.baidu.location.BDLocation;import com.baidu.location.BDLocationListener;import com.baidu.location.LocationClient;import com.baidu.location.LocationClientOption;import com.baidu.location.BDNotifyListener;//假如用到位置提醒功能，需要import该类import com.baidu.location.LocationClientOption.LocationMode;import com.baidu.location.Poi;import com.baidu.mapapi.SDKInitializer;import com.baidu.mapapi.map.MapView;public class MainActivity extends Activity implements OnClickListener{ MapView mMapView = null;  public static final String TAG="mian"; StringBuffer sb = new StringBuffer(256); public StringBuilder builder=new StringBuilder(); private Button bt1; private TextView tv1; private DBtools DBhelper; boolean isOpenLocation=false; public LocationClient mLocationClient = null; public BDLocationListener myListener = new MyLocationListener(); @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  SDKInitializer.initialize(getApplicationContext());   setContentView(R.layout.activity_main);  DBhelper = new DBtools(this);   tv1=(TextView) findViewById(R.id.textView1);  tv1.setMovementMethod(new ScrollingMovementMethod());  bt1=(Button) findViewById(R.id.button1);  bt1.setOnClickListener(this);  mMapView = (MapView) findViewById(R.id.bmapView);   mLocationClient = new LocationClient(getApplicationContext());  //声明LocationClient类  mLocationClient.registerLocationListener( myListener ); //注册监听函数  initLocation(); } private void initLocation(){  LocationClientOption option = new LocationClientOption();  option.setLocationMode(LocationMode.Hight_Accuracy);//可选，默认高精度，设置定位模式，高精度，低功耗，仅设备  option.setCoorType("bd09ll");//可选，默认gcj02，设置返回的定位结果坐标系  int span=0;  option.setScanSpan(span);//可选，默认0，即仅定位一次，设置发起定位请求的间隔需要大于等于1000ms才是有效的  option.setIsNeedAddress(true);//可选，设置是否需要地址信息，默认不需要  option.setOpenGps(true);//可选，默认false,设置是否使用gps  option.setLocationNotify(true);//可选，默认false，设置是否当gps有效时按照1S1次频率输出GPS结果  option.setIsNeedLocationDescribe(true);//可选，默认false，设置是否需要位置语义化结果，可以在BDLocation.getLocationDescribe里得到，结果类似于“在北京天安门附近”  option.setIsNeedLocationPoiList(true);//可选，默认false，设置是否需要POI结果，可以在BDLocation.getPoiList里得到  option.setIgnoreKillProcess(false);//可选，默认true，定位SDK内部是一个SERVICE，并放到了独立进程，设置是否在stop的时候杀死这个进程，默认不杀死   option.SetIgnoreCacheException(false);//可选，默认false，设置是否收集CRASH信息，默认收集  option.setEnableSimulateGps(false);//可选，默认false，设置是否需要过滤gps仿真结果，默认需要  mLocationClient.setLocOption(option); } @Override  protected void onDestroy() {   super.onDestroy();   //在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理   mMapView.onDestroy();  }  @Override  protected void onResume() {   super.onResume();   //在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理   mMapView.onResume();   }  @Override  protected void onPause() {   super.onPause();   //在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理   mMapView.onPause();   }  public class MyLocationListener implements BDLocationListener {  @Override  public void onReceiveLocation(BDLocation location) {   //Receive Location   StringBuffer sb = new StringBuffer(256);   sb.append("time : ");   sb.append(location.getTime());   sb.append("/nerror code : ");   sb.append(location.getLocType());   sb.append("/nlatitude : ");   sb.append(location.getLatitude());   sb.append("/nlontitude : ");   sb.append(location.getLongitude());   sb.append("/nradius : ");   sb.append(location.getRadius());   if (location.getLocType() == BDLocation.TypeGpsLocation){// GPS定位结果    sb.append("/nspeed : ");    sb.append(location.getSpeed());// 单位：公里每小时    sb.append("/nsatellite : ");    sb.append(location.getSatelliteNumber());    sb.append("/nheight : ");    sb.append(location.getAltitude());// 单位：米    sb.append("/ndirection : ");    sb.append(location.getDirection());// 单位度    sb.append("/naddr : ");    sb.append(location.getAddrStr());    sb.append("/ndescribe : ");    sb.append("gps定位成功");   } else if (location.getLocType() == BDLocation.TypeNetWorkLocation){// 网络定位结果    sb.append("/naddr : ");    sb.append(location.getAddrStr());    //运营商信息    sb.append("/noperationers : ");    sb.append(location.getOperators());    sb.append("/ndescribe : ");    sb.append("网络定位成功");   } else if (location.getLocType() == BDLocation.TypeOffLineLocation) {// 离线定位结果    sb.append("/ndescribe : ");    sb.append("离线定位成功，离线定位结果也是有效的");   } else if (location.getLocType() == BDLocation.TypeServerError) {    sb.append("/ndescribe : ");    sb.append("服务端网络定位失败，可以反馈IMEI号和大体定位时间到loc-bugs@baidu.com，会有人追查原因");   } else if (location.getLocType() == BDLocation.TypeNetWorkException) {    sb.append("/ndescribe : ");    sb.append("网络不同导致定位失败，请检查网络是否通畅");   } else if (location.getLocType() == BDLocation.TypeCriteriaException) {    sb.append("/ndescribe : ");    sb.append("无法获取有效定位依据导致定位失败，一般是由于手机的原因，处于飞行模式下一般会造成这种结果，可以试着重启手机");   }    sb.append("/nlocationdescribe : ");    sb.append(location.getLocationDescribe());// 位置语义化信息    List<Poi> list = location.getPoiList();// POI数据    if (list != null) {     sb.append("/npoilist size = : ");     sb.append(list.size());     for (Poi p : list) {     sb.append("/npoi= : ");     sb.append(p.getId() + " " + p.getName() + " " + p.getRank());     }    }   Log.i("BaiduLocationApiDem", sb.toString());   DBtools dbhelper=new DBtools(getApplicationContext());   ContentValues initialValues = new ContentValues();   initialValues.put("shijian",location.getTime());   initialValues.put("didian",location.getLatitude()+"--"+location.getLongitude());   dbhelper.open();   dbhelper.insert("path",initialValues);   dbhelper.close();   tv1.setText(sb.toString());   } } @Override public void onClick(View arg0) {  Thread mytime=new Thread(new ThreadShow());   if(isOpenLocation){    mLocationClient.stop();    isOpenLocation=false;    }   else{    Toast.makeText(getApplicationContext(), "开启", Toast.LENGTH_SHORT).show();      isOpenLocation=true;    //mLocationClient.start();    mytime.start();    }  } // handler类接收数据  Handler handler = new Handler() {   public void handleMessage(Message msg) {    if (msg.what == 1) {     Log.i("BaiduLocationApiDem", "加以");    mLocationClient.start();    mLocationClient.requestLocation();    }   };  };   // 线程类  class ThreadShow implements Runnable {    @Override   public void run() {    // TODO Auto-generated method stub    while (isOpenLocation) {     try {      mLocationClient.stop();     Thread.sleep(2000);      Message msg = new Message();      msg.what = 1;      handler.sendMessage(msg);      // System.out.println("send...");     } catch (Exception e) {      // TODO Auto-generated catch block      e.printStackTrace();      System.out.println("thread error...");     }    }   }  }  }

//某段代码如果是这样的话按照逻辑韩式会将mLocationClient所属类的里面逻辑代码执行一遍，具体见MainAvtivity里面的MyLocationListener类内容，但是实际上是不会执行的mLocationClient.start();mLocationClient.stop();

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.example.newloca.MainActivity" ><RelativeLayout  android:layout_width="match_parent" android:layout_height="300dp"> <com.baidu.mapapi.map.MapView  android:id="@+id/bmapView"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:clickable="true" /></RelativeLayout> <TextView  android:id="@+id/textView1"  android:layout_width="match_parent"  android:layout_height="150dp"  android:scrollbars="vertical"  android:background="#f00"  android:text="位置信息" /> <RelativeLayout  android:layout_width="match_parent"  android:layout_height="match_parent"   >  <Button   android:id="@+id/button1"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_alignParentRight="true"   android:layout_alignParentBottom="true"   android:text="获取位置" /> </RelativeLayout></LinearLayout>