如何使用GPS在Android中获取当前位置？
我想通过GPS以地址的形式获取我的当前位置。我正在使用android studio。 这意味着我的应用程序停止工作。 它的错误是什么？ 有人能帮我摆脱这一切吗 我在activity_main.xml文件中的代码是如何使用GPS在Android中获取当前位置？,android,android-location,android-gps,Android,Android Location,Android Gps,我想通过GPS以地址的形式获取我的当前位置。我正在使用android studio。 这意味着我的应用程序停止工作。 它的错误是什么？ 有人能帮我摆脱这一切吗 我在activity_main.xml文件中的代码是 <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
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"
tools:context=".MainActivity">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
AndroidManifest.xml <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
public List<Address> getFromLocation (double latitude, double int maxResults)
public List在您的AndroidManifest.xml中，您必须将其置于应用程序标记的上方或下方
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
因为您没有显示代码您一直在做什么，所以我不知道如何解决您的问题。但下面的代码是我用于应用程序获取当前用户所在国家/地区的代码
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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"
tools:context=".MainActivity">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
试试这个！（一年前做过）-将在一定时间间隔内更新您的所有移动位置
在等级中添加依赖项
implementation 'com.google.android.gms:play-services-location:16.0.0'
在清单中添加权限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
在你的活动中
public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, LocationListener {
double longitude;
double latitude;
TextView tv;
Context context;
Location mLastLocation;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public static final int REQUEST_ID_MULTIPLE_PERMISSIONS = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = this;
tv = findViewById(R.id. text_view);
mGoogleApiClient = new GoogleApiClient.Builder(this).addApi(LocationServices.API).addConnectionCallbacks(this).addOnConnectionFailedListener(this).build();
initLocation();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(100000); // Update location every second
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
{
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
latitude = mLastLocation.getLatitude();
longitude = mLastLocation.getLongitude();
setValue();
}
}
private void setValue() {
String strAddress = getAddressFromLocation(this, latitude, longitude);
tv.setText(strAddress);
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
@Override
public void onLocationChanged(Location location) {
if(location!=null){
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
public boolean checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
// Asking user if explanation is needed
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION))
{
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_LOCATION);
}
else
{
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
}
else
{
return true;
}
}
@Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
protected void onResume() {
super.onResume();
mGoogleApiClient.connect();
initLocation();
}
@Override
protected void onPause() {
super.onPause();
mGoogleApiClient.disconnect();
}
@Override
protected void onDestroy() {
mGoogleApiClient.disconnect();
super.onDestroy();
}
private void initLocation() {
if(checkAndRequestPermissions(context)) {
Toast.makeText(context,"Permission Granded",Toast.LENGTH_SHORT).show();
}
}
public static boolean checkAndRequestPermissions(Context context) {
int locationPermission = ContextCompat.checkSelfPermission(context,
Manifest.permission.ACCESS_FINE_LOCATION);
List<String> listPermissionsNeeded = new ArrayList<>();
if (locationPermission != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.ACCESS_FINE_LOCATION);
}
if (!listPermissionsNeeded.isEmpty()) {
ActivityCompat.requestPermissions((Activity) context, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),REQUEST_ID_MULTIPLE_PERMISSIONS);
return false;
}
return true;
}
public static String getAddressFromLocation(Context context, final double latitude, final double longitude) {
String straddress = "";
Geocoder geocoder = new Geocoder(context, Locale.getDefault());
try {
List<Address> addressList = geocoder.getFromLocation(
latitude, longitude, 1);
if (addressList != null && addressList.size() > 0) {
Address address = addressList.get(0);
StringBuilder sb = new StringBuilder();
if(address.getAddressLine(0) !=null && address.getAddressLine(0).length()>0 && !address.getAddressLine(0).contentEquals("null"))
{
sb.append(address.getAddressLine(0)).append("\n");
}else {
sb.append(address.getLocality()).append("\n");
sb.append(address.getPostalCode()).append("\n");
sb.append(address.getCountryName());
}
straddress = sb.toString();
//Log.e("leaddress","@"+straddress);
}
} catch (IOException e) {
//Log.e(TAG, "Unable connect to Geocoder", e);
}
return straddress;
}
}
公共类MainActivity扩展AppCompative实现GoogleAppClient.ConnectionCallbacks，
GoogleAppClient.OnConnectionFailedListener，LocationListener{
双经度；
双纬度；
文本视图电视；
语境；
位置mLastLocation；
私人GoogleapClient MGoogleapClient；
私人位置请求mLocationRequest；
公共静态final int MY_PERMISSIONS_REQUEST_LOCATION=99；
公共静态最终整数请求\u ID\u多个\u权限=1；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
上下文=这个；
tv=findViewById（R.id.text\u视图）；
mGoogleApiClient=new GoogleApiClient.Builder（this）.addApi（LocationServices.API）.addConnectionCallbacks（this）.addOnConnectionFailedListener（this.build（）；
initLocation（）；
}
@凌驾
未连接的公共无效（@Nullable Bundle）{
if（Build.VERSION.SDK\u INT>=Build.VERSION\u code.M）{
checkLocationPermission（）；
}
mLocationRequest=LocationRequest.create（）；
mLocationRequest.setPriority（位置请求.优先级高精度）；
mlLocationRequest.setInterval（100000）；//每秒更新一次位置
if（ContextCompat.checkSelfPermission（此，Manifest.permission.ACCESS\u FINE\u位置）==PackageManager.permission\u已授予）
{
LocationServices.FusedLocationApi.RequestLocationUpdate（mgoogleapClient、mlLocationRequest、this）；
}
mLastLocation=LocationServices.FusedLocationApi.getLastLocation（mgoogleapClient）；
如果（mLastLocation！=null）{
latitude=mLastLocation.getLatitude（）；
longitude=mLastLocation.getLongitude（）；
setValue（）；
}
}
私有void setValue（）{
String strAddress=getAddressFromLocation（这个、纬度、经度）；
tv.setText（strAddress）；
}
@凌驾
公共空间连接暂停（int i）{
}
@凌驾
public void onconnection失败（@NonNull ConnectionResult ConnectionResult）{
}
@凌驾
已更改位置上的公共无效（位置）{
如果（位置！=null）{
纬度=位置。getLatitude（）；
longitude=location.getLongitude（）；
}
}
公共布尔值checkLocationPermission（）{
if（ContextCompat.checkSelfPermission（this，Manifest.permission.ACCESS\u FINE\u LOCATION）！=PackageManager.permission\u已授予）
{
//询问用户是否需要解释
if（ActivityCompat.shouldshowRequestPermissionRegulation（这是Manifest.permission.ACCESS\u FINE\u位置））
{
//向用户显示解释*异步*--不阻止
//此线程正在等待用户的响应！在用户
//请查看说明，然后重试请求权限。
//显示说明后提示用户
ActivityCompat.requestPermissions（这个新字符串[]{Manifest.permission.ACCESS\u FINE\u LOCATION}，MY\u PERMISSIONS\u REQUEST\u LOCATION）；
}
其他的
{
//不需要解释，我们可以申请许可。
ActivityCompat.requestPermissions（这个新字符串[]{Manifest.permission.ACCESS\u FINE\u LOCATION}，MY\u PERMISSIONS\u REQUEST\u LOCATION）；
}
返回false；
}
其他的
{
返回true；
}
}
@凌驾
受保护的void onStart（）{
super.onStart（）；
mGoogleApiClient.connect（）；
}
@凌驾
受保护的void onResume（）{
super.onResume（）；
mGoogleApiClient.connect（）；
initLocation（）；
}
@凌驾
受保护的void onPause（）{
super.onPause（）；
mGoogleApiClient.disconnect（）；
}
@凌驾
受保护的空onDestroy（）{
mGoogleApiClient.disconnect（）；
super.ondestory（）；
}
私有void initLocation（）{
如果（检查和请求权限（上下文））{
Toast.makeText（上下文，“许可证授予”，Toast.LENGTH_SHORT）.show（）；
}
}
公共静态布尔检查和请求权限（上下文上下文）
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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"
tools:context=".MainActivity">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationManager;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import java.util.List;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
Location gps_loc;
Location network_loc;
Location final_loc;
double longitude;
double latitude;
String userCountry, userAddress;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tv = findViewById(R.id.text_view);
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_NETWORK_STATE) != PackageManager.PERMISSION_GRANTED) {
return;
}
try {
gps_loc = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
network_loc = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
} catch (Exception e) {
e.printStackTrace();
}
if (gps_loc != null) {
final_loc = gps_loc;
latitude = final_loc.getLatitude();
longitude = final_loc.getLongitude();
}
else if (network_loc != null) {
final_loc = network_loc;
latitude = final_loc.getLatitude();
longitude = final_loc.getLongitude();
}
else {
latitude = 0.0;
longitude = 0.0;
}
ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_NETWORK_STATE}, 1);
try {
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
if (addresses != null && addresses.size() > 0) {
userCountry = addresses.get(0).getCountryName();
userAddress = addresses.get(0).getAddressLine(0);
tv.setText(userCountry + ", " + userAddress);
}
else {
userCountry = "Unknown";
tv.setText(userCountry);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
implementation 'com.google.android.gms:play-services-location:16.0.0'
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, LocationListener {
double longitude;
double latitude;
TextView tv;
Context context;
Location mLastLocation;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public static final int REQUEST_ID_MULTIPLE_PERMISSIONS = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = this;
tv = findViewById(R.id. text_view);
mGoogleApiClient = new GoogleApiClient.Builder(this).addApi(LocationServices.API).addConnectionCallbacks(this).addOnConnectionFailedListener(this).build();
initLocation();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(100000); // Update location every second
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
{
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
latitude = mLastLocation.getLatitude();
longitude = mLastLocation.getLongitude();
setValue();
}
}
private void setValue() {
String strAddress = getAddressFromLocation(this, latitude, longitude);
tv.setText(strAddress);
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
@Override
public void onLocationChanged(Location location) {
if(location!=null){
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
public boolean checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
// Asking user if explanation is needed
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION))
{
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_LOCATION);
}
else
{
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
}
else
{
return true;
}
}
@Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
protected void onResume() {
super.onResume();
mGoogleApiClient.connect();
initLocation();
}
@Override
protected void onPause() {
super.onPause();
mGoogleApiClient.disconnect();
}
@Override
protected void onDestroy() {
mGoogleApiClient.disconnect();
super.onDestroy();
}
private void initLocation() {
if(checkAndRequestPermissions(context)) {
Toast.makeText(context,"Permission Granded",Toast.LENGTH_SHORT).show();
}
}
public static boolean checkAndRequestPermissions(Context context) {
int locationPermission = ContextCompat.checkSelfPermission(context,
Manifest.permission.ACCESS_FINE_LOCATION);
List<String> listPermissionsNeeded = new ArrayList<>();
if (locationPermission != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.ACCESS_FINE_LOCATION);
}
if (!listPermissionsNeeded.isEmpty()) {
ActivityCompat.requestPermissions((Activity) context, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),REQUEST_ID_MULTIPLE_PERMISSIONS);
return false;
}
return true;
}
public static String getAddressFromLocation(Context context, final double latitude, final double longitude) {
String straddress = "";
Geocoder geocoder = new Geocoder(context, Locale.getDefault());
try {
List<Address> addressList = geocoder.getFromLocation(
latitude, longitude, 1);
if (addressList != null && addressList.size() > 0) {
Address address = addressList.get(0);
StringBuilder sb = new StringBuilder();
if(address.getAddressLine(0) !=null && address.getAddressLine(0).length()>0 && !address.getAddressLine(0).contentEquals("null"))
{
sb.append(address.getAddressLine(0)).append("\n");
}else {
sb.append(address.getLocality()).append("\n");
sb.append(address.getPostalCode()).append("\n");
sb.append(address.getCountryName());
}
straddress = sb.toString();
//Log.e("leaddress","@"+straddress);
}
} catch (IOException e) {
//Log.e(TAG, "Unable connect to Geocoder", e);
}
return straddress;
}
}