Java 无法获取纬度和经度
我正试图获取位置信息。我需要经纬度 我正在用我的手机运行和调试。它是4.4.2 我的AndroidManifest文件:Java 无法获取纬度和经度,java,android,location,Java,Android,Location,我正试图获取位置信息。我需要经纬度 我正在用我的手机运行和调试。它是4.4.2 我的AndroidManifest文件: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.peylx.brstpcu.voteapp"> <uses-permission andr
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.peylx.brstpcu.voteapp">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".HomeActivity"
android:label="@string/title_activity_home"
android:theme="@style/AppTheme.NoActionBar"></activity>
</application>
</manifest>
当我试着调试我的程序时,它不会运行onLocationChanged()
方法。所以我无法得到吐司消息
如何解决这个问题?试试这个-
1) 在HomeActivity中实现OnMyLocationChangeListener
2) 抄送福勒。方法-
private Location getMyLocation() {
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location myLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
// if Location wasn't found
if (myLocation == null) {
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_COARSE);
String provider = lm.getBestProvider(criteria, true);
// Use the provider to get the last known location
myLocation = lm.getLastKnownLocation(provider);
double lat1 = myLocation.getLatitude();
double lng1 = myLocation.getLongitude();
Toast.makeText(HomeActivity.this,"Latitude = " + lat1 + "Longitude = " + lng1,Toast.LENGTH_LONG).show();
}
return myLocation;
}
3) 在onCreate()中调用getMyLocation()方法
它对我有用:)
注意:OnMyLocationChangeListener已被弃用(请查看谷歌文档)请尝试以下代码:
从OnCreate()方法调用checkLocation()方法:
//********************************************************************************
公共作废检查位置(活动){
locationManager=(locationManager)activity.getSystemService(Context.LOCATION\u服务);
标准c=新标准();
provider=locationManager.getBestProvider(c,false);
位置=获取位置(活动);
List providers=locationManager.getProviders(true);
for(字符串提供程序:提供程序){
Location l=locationManager.getLastKnownLocation(提供者);
Log.d(“位置提供程序”,“位置提供程序:”+l+“位置管理器”+locationManager);
if(l==null){
继续;
}否则{
位置=l;
打破
}
}
locationManager.requestLocationUpdates(提供者,400,1,this);
locationManager.RemoveUpdate(此);
如果(位置!=null){
//获取位置的纬度和经度
onLocationChanged(位置);
//在文本视图上显示
}否则{
//烤面包机。展示烤面包(这个,
//getResources().getString(R.string.NoConnection));
日志d(“卡恩格拉格”,“纬度:+Lat+“lng”+lng+“位置”+位置);
}
}
//================================================================GetLatLang============================
公共位置getLocation(活动){
试一试{
locationManager=(locationManager)activity.getSystemService(Context.LOCATION\u服务);
//获取GPS状态
isGPSEnabled=locationManager.isProviderEnabled(locationManager.GPS\U提供程序);
//获取网络状态
isNetworkEnabled=locationManager.isProviderEnabled(locationManager.NETWORK\u提供程序);
如果(!isGPSEnabled&!isNetworkEnabled){
//未启用任何网络提供程序
}否则{
if(可联网){
locationManager.RequestLocationUpdate(locationManager.NETWORK_提供程序,400,0,此);
Log.d(“网络”、“网络启用”);
如果(locationManager!=null){
location=locationManager.getLastKnownLocation(locationManager.NETWORK\u提供程序);
如果(位置!=null){
lat=位置。getLatitude();
lng=location.getLongitude();
}
}
}
//如果启用GPS,则使用GPS服务获取横向/纵向
如果(isGPSEnabled){
if(位置==null){
locationManager.RequestLocationUpdate(locationManager.GPS_提供程序,400,0,此);
Log.d(“GPS”、“GPS启用”);
如果(locationManager!=null){
location=locationManager.getLastKnownLocation(locationManager.GPS\U提供程序);
如果(位置!=null){
lat=位置。getLatitude();
lng=location.getLongitude();
}
}
}
}
}
}捕获(例外e){
e、 printStackTrace();
}
返回位置;
}
@凌驾
已更改位置上的公共无效(位置){
lat=位置。getLatitude();
lng=location.getLongitude();
}
@凌驾
public void onStatusChanged(字符串提供程序、int状态、Bundle extra){
}
@凌驾
公共无效onProviderEnabled(字符串提供程序){
}
@凌驾
公共无效onProviderDisabled(字符串提供程序){
}
首先,您的活动应该实现LocationListener
public class HomeActivity extends AppCompatActivity implements LocationListener{
private LocationManager locationManager;
private LocationListener locationListener;
private double latitude;
private double longitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
latitude = location.getLatitude();
longitude = location.getLongitude();
Toast.makeText(getApplicationContext(),"Latitude = " + Double.toString(latitude) + "Longitude = " + Double.toString(longitude),Toast.LENGTH_LONG).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
Intent settingsIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(settingsIntent);
}
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{
Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.INTERNET
}, 10);
return;
}
} else {
configureButton();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case 10:
if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
configureButton();
return;
}
}
private void configureButton(){
locationManager.requestLocationUpdates("gps", 5000, 0, locationListener);
}
}
你把你的听众放在哪里?我想在活动开始时得到所有这些。所以这就是为什么我在onCreate Section中添加了configureButton()方法,您要求的是button listener,对吗?如果您询问locationListener,我已经在configureButton方法中使用了它,那么您正在实例化一个侦听器,但您没有使用它,那么为什么您认为应该接收位置更新?查看LocationManager.requestLocationUpdates
方法我尝试使用按钮tooAm我应该添加一些依赖项以使用此方法?我无法在MyLocationListener上实现。LocationListener呢?抱歉,我是新手,如果您正在使用Android Studio,请将依赖项添加为-compile'com.google.Android.gms:play services:*.*.*其中,*表示库的最新版本。然后在活动中实现OnMyLocationChangeListener。根据ua的选择,您可以同时使用LocationListener接口或OnMyLocationChangeListener接口。请参考-谷歌游戏服务。非常感谢!我的代码现在已经在运行了,但我要试试这个too04-18 16:38:04.460 1610-1610/com.peylx.brstpcu.voteapp D/cahngeLag:Lat:0.0lng0.0locationnull 04-18 16:38:04.550 1610-1610/com.peylx.brstpcu.voteapp I/ActivityManager:Timeline:Activity\u idle id:android.os。BinderProxy@41a0ff68时间:15943727204-1816:38:10.3101610-1610/com.peylx.brstpcu.voteapp D/Netw
// ********************************************************************************
public void checkLocation(Activity activity) {
locationManager = (LocationManager) activity.getSystemService(Context.LOCATION_SERVICE);
Criteria c = new Criteria();
provider = locationManager.getBestProvider(c, false);
location = getLocation(activity);
List<String> providers = locationManager.getProviders(true);
for (String provider : providers) {
Location l = locationManager.getLastKnownLocation(provider);
Log.d("Location provider", "Location provider : " + l + "locationManager" + locationManager);
if (l == null) {
continue;
} else {
location = l;
break;
}
}
locationManager.requestLocationUpdates(provider, 400, 1, this);
locationManager.removeUpdates(this);
if (location != null) {
// get latitude and longitude of the location
onLocationChanged(location);
// display on text view
} else {
// Toaster.showToast(this,
// getResources().getString(R.string.NoConnection));
Log.d("cahngeLag", "Lat: " + lat + "lng" + lng + "location" + location);
}
}
// ===============================GetLatLang============================
public Location getLocation(Activity activity) {
try {
locationManager = (LocationManager) activity.getSystemService(Context.LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 400, 0, this);
Log.d("Network", "Network Enabled");
if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
lat = location.getLatitude();
lng = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 400, 0, this);
Log.d("GPS", "GPS Enabled");
if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
lat = location.getLatitude();
lng = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
@Override
public void onLocationChanged(Location location) {
lat = location.getLatitude();
lng = location.getLongitude();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
public class HomeActivity extends AppCompatActivity implements LocationListener{
private LocationManager locationManager;
private LocationListener locationListener;
private double latitude;
private double longitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
latitude = location.getLatitude();
longitude = location.getLongitude();
Toast.makeText(getApplicationContext(),"Latitude = " + Double.toString(latitude) + "Longitude = " + Double.toString(longitude),Toast.LENGTH_LONG).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
Intent settingsIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(settingsIntent);
}
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{
Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.INTERNET
}, 10);
return;
}
} else {
configureButton();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case 10:
if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
configureButton();
return;
}
}
private void configureButton(){
locationManager.requestLocationUpdates("gps", 5000, 0, locationListener);
}
}