公司项目有用到百度地图,登录的时候需要定位一次,获取登录的地址信息,在手机无法连接外网的情况,也就无法访问百度定位服务器的时候,定位的回调函数要30秒以上才能返回结果,于是去仔细查百度api,发现没有设置回调函数时间的方法或者属性.

解决办法就是把回调函数参数赋值给实例变量

	/**

	 * 实现实位回调监听,如果访问百度定位服务器成功就会把结果赋值给location

	 * 否则这个location为null

	 */

	public class MyLocationListener implements BDLocationListener {

		@Override

		public void onReceiveLocation(BDLocation db) {

			location=db;

		}

	}

开启一个延时2.5秒的线程,在线程中判断回调函数有没有调用......如果手机能连接外网并且能成功访问百度服务器的话,2秒左右能返回结果

//延迟2.5秒执行locationResult()

//正常情况下访问百度定位服务器只需要2秒

new Handler().postDelayed(new Runnable() {

	@Override

	public void run() {

		if(null==location){//为空表示百度sdk定位失败

		}else{//定位成功

		}

	}

}, 2500);

完整代码如下:

package com.baidu.baidulocationdemo;

import com.baidu.location.BDLocation;

import com.baidu.location.BDLocationListener;

import com.baidu.location.LocationClient;

import com.baidu.location.LocationClientOption;

import android.os.Bundle;

import android.os.Handler;

import android.app.Activity;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.TextView;

public class MainActivity extends Activity {

	public LocationClient locationClient;

	private BDLocation location;

	private TextView mLocationResult;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		mLocationResult=(TextView) findViewById(R.id.location_result);

		findViewById(R.id.start_location).setOnClickListener(clickListener);

		findViewById(R.id.stop_location).setOnClickListener(clickListener);

		LocationClientOption option = new LocationClientOption();

		option.setCoorType("bd09ll");//设置坐标类型

		locationClient = new LocationClient(this);

		locationClient.registerLocationListener(new MyLocationListener());

		locationClient.setLocOption(option);

	}

	private OnClickListener clickListener=new OnClickListener(){

		@Override

		public void onClick(View v) {

			switch (v.getId()) {

			case R.id.start_location:

				locationClient.start();

				//延迟2.5秒执行locationResult()

				//正常情况下访问百度定位服务器只需要2秒

				new Handler().postDelayed(new Runnable() {

					@Override

					public void run() {

						locationResult();

					}

				}, 2500);

				break;

			case R.id.stop_location:

				distory();

				break;

			}

		}

	};

	/**

	 * 实现实位回调监听,如果访问百度定位服务器成功就会把结果赋值给location

	 * 否则这个location为null

	 */

	public class MyLocationListener implements BDLocationListener {

		@Override

		public void onReceiveLocation(BDLocation db) {

			location=db;

		}

	}

	private void locationResult(){

		if(null==location){//为空表示百度sdk定位失败

			location=new BDLocation();

		}

		//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 (mLocationResult != null)

			mLocationResult.setText(sb.toString());

		Log.i("BaiduLocationApiDem", sb.toString());

		distory();

	}

    private void distory(){//关闭定位

		 if (locationClient != null && locationClient.isStarted()) {

			 locationClient.stop();

		 }

    }

}

效果图如下:

推荐下自己创建的android QQ群:202928390  
欢迎大家的加入.

点击下载源码