Android 定位服务LocationManager实例详解

try {

addresses = geocoder.getFromLocation(latitude, longitude, 1);

if (addresses != null && !addresses.isEmpty()) {

Address address = addresses.get(0);

// 可以从Address对象中获取更多的地址信息

return address.getAddressLine(0);

}

} catch (IOException ioException) {

// 网络问题或I/O错误

}

return null;

}

以上代码中，我们创建了一个Geocoder对象，并通过getFromLocation方法来获取指定经纬度的地址信息，然后通过getAddressLine方法获取到地址信息。

3.完整代码

3.1 activity_main.xml

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#00000000"

tools:context=".MainActivity">

android:id="@+id/text_provider"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="20dp"

android:layout_marginLeft="10dp"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

android:textSize="16sp"

android:text="provider暂未获取数据">

android:id="@+id/text_xy"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="10dp"

android:layout_marginLeft="10dp"

app:layout_constraintTop_toBottomOf="@id/text_provider"

app:layout_constraintLeft_toLeftOf="parent"

android:textSize="16sp"

android:text="经纬度暂未获取数据">

android:id="@+id/text_address"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="10dp"

android:layout_marginLeft="10dp"

app:layout_constraintTop_toBottomOf="@id/text_xy"

app:layout_constraintLeft_toLeftOf="parent"

android:textSize="16sp"

android:text="地址暂未获取数据">

3.2 AndroidManifest.xml

xmlns:tools="http://schemas.android.com/tools">

android:allowBackup="true"

android:dataExtractionRules="@xml/data_extraction_rules"

android:fullBackupContent="@xml/backup_rules"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:supportsRtl="true"

android:theme="@style/Theme.GPSTest"

tools:targetApi="31">

android:name=".MainActivity"

android:exported="true">

3.3 MainActivity.java

package com.zhiyi.gpstest;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.app.ActivityCompat;

import androidx.core.content.ContextCompat;

import android.Manifest;

import android.content.Context;

import android.content.pm.PackageManager;

import android.location.Address;

import android.location.Criteria;

import android.location.Geocoder;

import android.location.Location;

import android.location.LocationListener;

import android.location.LocationManager;

import android.os.Bundle;

import android.util.Log;

import android.widget.TextView;

import android.widget.Toast;

import java.io.IOException;

import java.util.List;

import java.util.Locale;

public class MainActivity extends AppCompatActivity {

private static final String TAG = "GPSTest";

private static final int REQUEST_LOCATION_PERMISSION = 100;

private static final int LOCATION_INTERVAL = 3000;

private static final float LOCATION_DISTANCE = 0f;

private LocationManager mLocationManager;

private LocationListener mLocationListener;

private TextView mTextProvider;

private TextView mTextXY;

private TextView mTextAddress;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

Log.d(TAG,"onCreate()");

setContentView(R.layout.activity_main);

mTextProvider = (TextView) findViewById(R.id.text_provider);

mTextXY = (TextView) findViewById(R.id.text_xy);

mTextAddress = (TextView) findViewById(R.id.text_address);

// 申请权限

requestPermission();

}

@Override

protected void onResume() {

super.onResume();

Log.d(TAG,"onResume()");

try {

createNativeLocation();

} catch (SecurityException e) {

e.printStackTrace();

}

}

@Override

protected void onPause() {

super.onPause();

if (mLocationManager == null || mLocationListener == null) {

return;

}

mLocationManager.removeUpdates(mLocationListener);

}

// 原生的定位服务

private void createNativeLocation() {

Log.d(TAG,"createNativeLocation()");

mLocationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

mLocationListener = new MyLocationListener();

Criteria criteria = new Criteria();

criteria.setAccuracy(Criteria.ACCURACY_COARSE);

criteria.setAltitudeRequired(false);//不要求海拔

criteria.setBearingRequired(false);//不要求方位

criteria.setCostAllowed(true);//允许有花费

criteria.setPowerRequirement(Criteria.POWER_LOW);//低功耗

String provider = mLocationManager.getBestProvider(criteria, true);

Log.d(TAG,"定位的provider:" + provider);

mTextProvider.setText("Provider: " + provider);

Location location = mLocationManager.getLastKnownLocation(provider);

Log.d(TAG,"location-" + location);

if (location != null) {

//不为空,显示地理位置经纬度

String longitude = "Longitude:" + location.getLongitude();

String latitude = "Latitude:" + location.getLatitude();

Log.d(TAG,"getLastKnownLocation:" + longitude + "-" + latitude);

}

//第二个参数是间隔时间 第三个参数是间隔多少距离，这里我试过了不同的各种组合，能获取到位置就是能，不能获取就是不能

mLocationManager.requestLocationUpdates(provider, LOCATION_INTERVAL, LOCATION_DISTANCE, mLocationListener);

}

class MyLocationListener implements LocationListener {

// 位置改变时获取经纬度

@Override

public void onLocationChanged(Location location) {

String longitude = "经度: " + location.getLongitude();

String latitude = "纬度: " + location.getLatitude();

Log.d(TAG,"onLocationChanged:" + longitude + "-" + latitude);

mTextXY.setText(longitude + " - " + latitude);

String locationAddress = getAddressFromLocation(location.getLatitude(), location.getLongitude(), MainActivity.this);

mTextAddress.setText("地址: " + locationAddress);

Log.d(TAG,"地址: " + locationAddress);

}

// 状态改变时

@Override

public void onStatusChanged(String provider, int status, Bundle extras) {

Log.d(TAG,"onStatusChanged - provider:"+provider +" status:"+status);

}

// 提供者可以使用时

@Override

public void onProviderEnabled(String provider) {

Log.d(TAG,"GPS开启了");

}

// 提供者不可以使用时

@Override

public void onProviderDisabled(String provider) {

Log.d(TAG,"GPS关闭了");

}

}

public static String getAddressFromLocation(double latitude, double longitude, Context context) {

Geocoder geocoder = new Geocoder(context, Locale.getDefault());

List