手机GPS获取海拔

手机GPS获取海拔

六月 09, 2017

首先GPS在室内是没有信号的,所以只能在室外或者窗口获取到海拔等一系列数据。

java代码如下

package com.example.altitudeproject;

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.activity_main);  

    // 定义UI组件   
    Button b1 = (Button) findViewById(R.id.bt_button1);   
    tv1 = (TextView) findViewById(R.id.tv_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);   

    // 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("onLocationChanged", 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("onProviderEnabled", arg0);   
        }   

        // Provider状态改变时触发   
        @Override  
        public void onStatusChanged(String arg0, int arg1, Bundle arg2) {   
            Log.i("onStatusChanged", "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) {   
        tv1.setText("定位信息如下:" + location.toString()+"\n\t海拔:"+location.getAltitude() +"\n\t方向:"+location.getBearing()+ "\n\t经度:" + location.getLongitude() + "\n\t纬度:"  
                + location.getLatitude()+"\n\t提供商:"+location.getProvider()+"\n\t速度:"+location.getSpeed()+"\n\t时间:"+location.getTime());   
    } else {   
        Log.i("updateLocation", "没有获取到定位对象Location");   
    }   
}   

}

xml代码如下:




AndroidManifest.xml中需要配置权限:

作者:杰骜不驯丶
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