百度sdk定位不成功,关闭定位

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:

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