Android定位功能开发-获取经纬度坐标的例子

package com.zzk.a1701location; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.ActivityCompat; import android.Manifest; import android.annotation.SuppressLint; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.PackageManager; 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.*; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { TextView tvResult; Button btnStart; Button btnStop; EditText etPeriod; EditText etDistance; LocationManager manager; LocationListener listener; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tvResult = (TextView) findViewById(R.id.textViewResult); btnStart = (Button) findViewById(R.id.buttonStart); btnStop = (Button) findViewById(R.id.buttonStop); etPeriod = (EditText) findViewById(R.id.editTextPeriod); etDistance = (EditText) findViewById(R.id.editTextDistance); manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); if (!manager.isProviderEnabled(LocationManager.GPS_PROVIDER) && !manager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) { askLocationSettings(); } listener = new LocationListener() { @Override public void onLocationChanged(Location arg0) { String txt = "Longitude:" + arg0.getLongitude() + ", Latitude:" + arg0.getLatitude() + // 经度，纬度 ", Altitude" + arg0.getAltitude() + ", Speed:" + arg0.getSpeed(); // 高度，速度 tvResult.append(txt + "\n"); } @Override public void onProviderDisabled(String arg0) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String arg0) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String arg0, int arg1, Bundle arg2) { // TODO Auto-generated method stub } }; btnStart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { if (ActivityCompat.checkSelfPermission(getBaseContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getBaseContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { String[] permissions = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}; if (!checkPermissions(permissions, 101)) { return; } } startListening(); } }); btnStop.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { manager.removeUpdates(listener); tvResult.append("Location listener stoped.\n"); } }); } @SuppressLint("MissingPermission") void startListening(){ Criteria crt = new Criteria(); // 位置监听标准 crt.setHorizontalAccuracy(Criteria.ACCURACY_HIGH); // 水平精度高 crt.setAltitudeRequired(true); // 需要高度 String provider = manager.getBestProvider(crt, true); // 寻找最匹配的provider Location l = manager.getLastKnownLocation(provider); // 取最后已知位置，即缓存中的位置 if(l!=null) tvResult.append(provider + "-LastKnown:" + l.toString() + "\n"); long period = Long.parseLong(etPeriod.getText().toString()); // 最小时间间隔 int distance = Integer.parseInt(etDistance.getText().toString()); // 最小距离 manager.requestLocationUpdates(provider, period*1000, distance, listener); // 开始监听 tvResult.append(provider + "-Location listener started.\n"); } void askLocationSettings(){ AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("开启位置服务"); builder.setMessage("本应用需要开启位置服务，是否去设置界面开启位置服务？"); builder.setPositiveButton("是", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { final Intent intent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); MainActivity.this.startActivity(intent); } }); builder.setNegativeButton("否", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { Toast.makeText(MainActivity.this, "No location provider to use", Toast.LENGTH_SHORT).show(); } }); builder.show(); } /** * 检查需要的权限是否都允许 * @param permisssions 需要的权限 * @param requestCode 结果返回后区分请求者 * @return true，如果都允许了；false，至少有一项权限没有允许 */ boolean checkPermissions(String[] permisssions, int requestCode) { List<String> ungranted = new ArrayList<String>(); for(String permission:permisssions) { if (ActivityCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) { ungranted.add(permission); } } if(ungranted.size()>0){ String[] ungrantedString = new String[ungranted.size()]; ActivityCompat.requestPermissions(this, (String[])ungranted.toArray(ungrantedString), requestCode); return false; } return true; } boolean checkGrantResults(int[] grantResults){ for(int result:grantResults){ if(result!=PackageManager.PERMISSION_GRANTED) { return false; } } return true; } @Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { if(checkGrantResults(grantResults)){ Log.i("zzk", "permission granted"); if(requestCode==101){ // 权限申请通过后的处理 startListening(); } } super.onRequestPermissionsResult(requestCode, permissions, grantResults); } }