GPS_定位

来源：互联网发布：淘宝怎么加入中国质造编辑：程序博客网时间：2024/06/15 11:21

<!-- 连接互联网Internet权限 -->     <uses-permission android:name="android.permission.INTERNET" />     <!-- GPS定位权限 -->     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

package alice.bw.com.day10_gps;import android.Manifest;import android.content.Context;import android.content.Intent;import android.content.pm.PackageManager;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.location.LocationProvider;import android.os.Bundle;import android.provider.Settings;import android.support.v4.app.ActivityCompat;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    private LocationManager lm;    private EditText ed;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ed = (EditText) findViewById(R.id.ed);        //获取位置服务管理器        lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);        // 判断GPS是否正常启动        if (!lm.isProviderEnabled(LocationManager.GPS_PROVIDER)) {            Toast.makeText(this, "请开启GPS导航...", Toast.LENGTH_SHORT).show();            // 返回开启GPS导航设置界面            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);            startActivityForResult(intent, 1);        }        //        syst.addGpsStatusListener(gps);        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {            // TODO: Consider calling            //    ActivityCompat#requestPermissions            // here to request the missing permissions, and then overriding            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,            //                                          int[] grantResults)            // to handle the case where the user grants the permission. See the documentation            // for ActivityCompat#requestPermissions for more details.            return;        }        // 绑定监听，有4个参数 监听位置变化        // 参数1，设备：有GPS_PROVIDER和NETWORK_PROVIDER两种        // 参数2，位置信息更新周期，单位毫秒        // 参数3，位置变化最小距离：当位置距离变化超过此值时，将更新位置信息        // 参数4，监听        // 备注：参数2和3，如果参数3不为0，则以参数3为准；参数3为0，则通过时间来定时更新；两者为0，则随时刷新        // 1秒更新一次，或最小位移变化超过1米更新一次；        // 注意：此处更新准确度非常低，推荐在service里面启动一个Thread，在run中sleep(10000);然后执行handler.sendMessage(),更新位置        lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, lo);    }    // 位置监听    LocationListener lo = new LocationListener() {        /**         * 位置信息变化时触发         */        //位置发生变换的时候调用该方法        @Override        public void onLocationChanged(Location location) {            updateView(location);        }        /**         * GPS状态变化时触发         */        @Override        public void onStatusChanged(String provider, int status, Bundle extras) {            switch (status) {                // GPS状态为可见时                case LocationProvider.AVAILABLE:                    Log.i("sxl", "当前GPS状态为可见状态");                    break;                // GPS状态为服务区外时                case LocationProvider.OUT_OF_SERVICE:                    Log.i("sxl", "当前GPS状态为服务区外状态");                    break;                // GPS状态为暂停服务时                case LocationProvider.TEMPORARILY_UNAVAILABLE:                    Log.i("sxl", "当前GPS状态为暂停服务状态");                    break;            }        }        /**         * GPS开启时触发         */        @Override        public void onProviderEnabled(String provider) {            if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {                // TODO: Consider calling                //    ActivityCompat#requestPermissions                // here to request the missing permissions, and then overriding                //   public void onRequestPermissionsResult(int requestCode, String[] permissions,                //                                          int[] grantResults)                // to handle the case where the user grants the permission. See the documentation                // for ActivityCompat#requestPermissions for more details.                return;            }            Location location = lm.getLastKnownLocation(provider);            updateView(location);        }        /**         * GPS禁用时触发         */        @Override        public void onProviderDisabled(String s) {//            updateView(null);        }    };    /**     * 实时更新文本内容     *     *     */    public void updateView(Location lo){        ed.setText("经度:");        ed.append(String.valueOf(lo.getLongitude()));        ed.append("纬度:");        ed.append(String.valueOf(lo.getLatitude()));        ed.append("海拔:");        ed.append(String.valueOf(lo.getAltitude()));    }}

阅读全文

0 0