大家早上好，
我有一项活动，在执行时启动服务。特别是GPSService，这项服务等待它到达纬度和经度坐标。 当坐标更新时，服务通过LocalBroadcastManager将坐标发送到等待它的活动。
我遇到的问题是活动永远不会发生任何事情。
我离开了我的活动：
public class MainActivity extends AppCompatActivity {
private TextView latitude;
private TextView longitude;
private static final int PETITION_PERMISSION_LOCATION = 101;
private double dLatitude;
private double dLongitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
IntentFilter iff= new IntentFilter(GPSService.ACTION);
LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver, iff);
latitude = findViewById(R.id.lblLatitud);
longitude = findViewById(R.id.lblLongitud);
ejecuteService();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, dLatitude + " : " + dLongitude, Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
if (isMyServiceRunning(GPSService.class)){
stopService(new Intent(MainActivity.this, GPSService.class));
latitude.setText(String.valueOf(dLatitude));
longitude.setText(String.valueOf(dLongitude));
}else {
ejecuteService();
}
}
});
}
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.e("onReceive","onReceive called");
dLatitude = intent.getDoubleExtra("latitude", 0);
dLongitude = intent.getDoubleExtra("longitude", 0);
Log.e("receiver", "Got Latitude: " + dLatitude);
Log.e("receiver", "Got Longitude: " + dLongitude);
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void ejecuteService(){
if (ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
PETITION_PERMISSION_LOCATION);
} else {
startService(new Intent(MainActivity.this, GPSService.class));
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
if (requestCode == PETITION_PERMISSION_LOCATION) {
if (grantResults.length == 1
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Permission granted
startService(new Intent(MainActivity.this, GPSService.class));
} else {
//Permission denied:
Log.e("PETITION PERMISSION", "Permission denied");
}
}
}
private boolean isMyServiceRunning(Class<?> serviceClass) {
ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
if (serviceClass.getName().equals(service.service.getClassName())) {
return true;
}
}
return false;
}
}
以下是该服务的内容：
public class GPSService extends Service
{
private static final String TAG = "GPSLocation";
private LocationManager mLocationManager = null;
private static final int LOCATION_INTERVAL = 1000;
private static final float LOCATION_DISTANCE = 10f;
public static final String ACTION = "gpssend";
private class LocationListener implements android.location.LocationListener
{
Location mLastLocation;
public LocationListener(String provider)
{
Log.e(TAG, "LocationListener " + provider);
mLastLocation = new Location(provider);
}
@Override
public void onLocationChanged(Location location)
{
Log.e(TAG, "onLocationChanged: " + location);
mLastLocation.set(location);
Log.i(TAG, "Latitude: " + location.getLatitude());
Log.i(TAG, "Longitude: " + location.getLongitude());
sendMessage(location);
}
@Override
public void onProviderDisabled(String provider)
{
Log.e(TAG, "onProviderDisabled: " + provider);
}
@Override
public void onProviderEnabled(String provider)
{
Log.e(TAG, "onProviderEnabled: " + provider);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
Log.e(TAG, "onStatusChanged: " + provider);
}
}
LocationListener[] mLocationListeners = new LocationListener[] {
new LocationListener(LocationManager.GPS_PROVIDER),
new LocationListener(LocationManager.NETWORK_PROVIDER)
};
@Override
public IBinder onBind(Intent arg0)
{
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
Log.e(TAG, "onStartCommand");
super.onStartCommand(intent, flags, startId);
return START_STICKY;
}
@Override
public void onCreate()
{
Log.e(TAG, "onCreate");
initializeLocationManager();
try {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[1]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "network provider does not exist, " + ex.getMessage());
}
try {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[0]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "gps provider does not exist " + ex.getMessage());
}
}
@Override
public void onDestroy()
{
Log.e(TAG, "onDestroy");
super.onDestroy();
if (mLocationManager != null) {
for (int i = 0; i < mLocationListeners.length; i++) {
try {
mLocationManager.removeUpdates(mLocationListeners[i]);
} catch (Exception ex) {
Log.i(TAG, "fail to remove location listners, ignore", ex);
}
}
}
}
private void initializeLocationManager() {
Log.e(TAG, "initializeLocationManager");
if (mLocationManager == null) {
mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
}
}
private void sendMessage(Location location) {
Log.d(TAG, "Broadcasting message");
Intent intent = new Intent(ACTION);
// You can also include some extra data.
intent.putExtra("latitude", location.getLatitude());
intent.putExtra("longitude", location.getLongitude());
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
}
在日志的内容中，您可以通过立即更新坐标来查看服务的工作原理。但是活动并没有回复任何东西。
02-19 20:03:18.815 5238-5267/com.google.android.apps.docs I/ProviderInstaller: Installed default security provider GmsCore_OpenSSL
02-19 20:03:24.347 5366-5366/es.jjsr.newmygpsapp:my_service E/GPSLocation: onLocationChanged: Location[gps 37.424998,-122.081998 acc=20 et=+1h2m37s264ms alt=0.0 {Bundle[mParcelledData.dataSize=40]}]
02-19 20:03:24.347 5366-5366/es.jjsr.newmygpsapp:my_service I/GPSLocation: Latitude: 37.42499833333333
02-19 20:03:24.347 5366-5366/es.jjsr.newmygpsapp:my_service I/GPSLocation: Longitude: -122.08199833333335
02-19 20:03:24.347 5366-5366/es.jjsr.newmygpsapp:my_service D/GPSLocation: Broadcasting message
02-19 20:03:24.348 5366-5366/es.jjsr.newmygpsapp:my_service E/GPSLocation: onStatusChanged: gps
02-19 20:03:27.159 1640-2158/system_process D/WifiService: acquireWifiLockLocked: WifiLock{NlpWifiLock type=2 uid=10012}
02-19 20:03:27.163 1640-1651/system_process D/WifiService: releaseWifiLockLocked: WifiLock{NlpWifiLock type=2 uid=10012}
02-19 20:03:47.163 1640-1667/system_process D/WifiService: acquireWifiLockLocked: WifiLock{NlpWifiLock type=2 uid=10012}
02-19 20:03:47.167 1640-1863/system_process D/WifiService: releaseWifiLockLocked: WifiLock{NlpWifiLock type=2 uid=10012}
02-19 20:04:07.210 1640-2187/system_process D/WifiService: acquireWifiLockLocked: WifiLock{NlpWifiLock type=2 uid=10012}
02-19 20:04:07.215 1640-1863/system_process D/WifiService: releaseWifiLockLocked: WifiLock{NlpWifiLock type=2 uid=10012}
02-19 20:04:11.092 1392-1412/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 772859 , only wrote 772560
02-19 20:04:11.101 5366-5366/es.jjsr.newmygpsapp:my_service E/GPSLocation: onDestroy
02-19 20:04:11.102 1640-2156/system_process I/GnssLocationProvider: WakeLock acquired by sendMessage(3, 0, com.android.server.location.GnssLocationProvider$GpsRequest@35d3846)
02-19 20:04:11.103 1640-1653/system_process I/GnssLocationProvider: WakeLock released by handleMessage(3, 0, com.android.server.location.GnssLocationProvider$GpsRequest@35d3846)
02-19 20:04:14.303 1392-1413/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 1078684 , only wrote 926640
02-19 20:05:07.215 1640-1652/system_process D/WifiService: acquireWifiLockLocked: WifiLock{NlpWifiLock type=2 uid=10012}
清单文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="es.jjsr.newmygpsapp">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:name=".GlobalApplication"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".GPSService" android:process=":my_service" />
</application>
</manifest>
感谢这个社区，我学到了很多东西。 非常感谢你的一切
答案 0 :(得分：1)
您必须在清单文件中注册您的广播接收器。我认为，现在这是一个问题
答案 1 :(得分：1)
在onCreate（）方法中编写以下代码 -
LocalBroadcastManager.getInstance(getApplicationContext())
.registerReceiver(mBroadcastReceiver,
new IntentFilter(MyService3.MY_SERVICE_MESSAGE));
使用以下代码 -
LocalBroadcastManager.getInstance(getApplicationContext())
.unregisterReceiver(mBroadcastReceiver);
这将注册和取消注册您的听众。 由于您已经在清单文件中声明了服务，因此使用上面的代码将使您的项目正常工作。如果没有，发送任何错误
答案 2 :(得分：0)
我在这里解释了它的解决方法。有趣的是MainActivity的BroadcastReceiver
我的GPS服务
public class GPSService extends Service
{
private static final String TAG = "GPSLocation";
private LocationManager mLocationManager = null;
private static final int LOCATION_INTERVAL = 1000;
private static final float LOCATION_DISTANCE = 10f;
public static final String ACTION = "gpssend";
private class LocationListener implements android.location.LocationListener
{
Location mLastLocation;
public LocationListener(String provider)
{
Log.e(TAG, "LocationListener " + provider);
mLastLocation = new Location(provider);
}
@Override
public void onLocationChanged(Location location)
{
Log.e(TAG, "onLocationChanged: " + location);
mLastLocation.set(location);
Log.i(TAG, "Latitude: " + location.getLatitude());
Log.i(TAG, "Longitude: " + location.getLongitude());
sendMessage(location);
}
@Override
public void onProviderDisabled(String provider)
{
Log.e(TAG, "onProviderDisabled: " + provider);
}
@Override
public void onProviderEnabled(String provider)
{
Log.e(TAG, "onProviderEnabled: " + provider);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
Log.e(TAG, "onStatusChanged: " + provider);
}
}
LocationListener[] mLocationListeners = new LocationListener[] {
new LocationListener(LocationManager.GPS_PROVIDER),
new LocationListener(LocationManager.NETWORK_PROVIDER)
};
@Override
public IBinder onBind(Intent arg0)
{
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
Log.e(TAG, "onStartCommand");
super.onStartCommand(intent, flags, startId);
return START_STICKY;
}
@Override
public void onCreate()
{
Log.e(TAG, "onCreate");
initializeLocationManager();
try {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[1]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "network provider does not exist, " + ex.getMessage());
}
try {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[0]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "gps provider does not exist " + ex.getMessage());
}
}
@Override
public void onDestroy()
{
Log.e(TAG, "onDestroy");
super.onDestroy();
if (mLocationManager != null) {
for (int i = 0; i < mLocationListeners.length; i++) {
try {
mLocationManager.removeUpdates(mLocationListeners[i]);
} catch (Exception ex) {
Log.i(TAG, "fail to remove location listners, ignore", ex);
}
}
}
}
private void initializeLocationManager() {
Log.e(TAG, "initializeLocationManager");
if (mLocationManager == null) {
mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
}
}
private void sendMessage(Location location) {
Log.d(TAG, "Broadcasting message");
Intent intent = new Intent();
intent.setAction(ACTION);
// You can also include some extra data.
intent.putExtra("latitude", location.getLatitude());
intent.putExtra("longitude", location.getLongitude());
sendBroadcast(intent);
}
}
我的主要活动
public class MainActivity extends AppCompatActivity {
private TextView latitude;
private TextView longitude;
private static final int PETITION_PERMISSION_LOCATION = 101;
private double dLatitude;
private double dLongitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
latitude = findViewById(R.id.lblLatitud);
longitude = findViewById(R.id.lblLongitud);
ejecuteService();
IntentFilter filter = new IntentFilter();
filter.addAction(GPSService.ACTION);
Receiver receiver = new Receiver();
registerReceiver(receiver, filter);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, dLatitude + " : " + dLongitude, Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
if (isMyServiceRunning(GPSService.class)){
stopService(new Intent(MainActivity.this, GPSService.class));
latitude.setText(String.valueOf(dLatitude));
longitude.setText(String.valueOf(dLongitude));
}else {
ejecuteService();
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void ejecuteService(){
if (ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
PETITION_PERMISSION_LOCATION);
} else {
startService(new Intent(MainActivity.this, GPSService.class));
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
if (requestCode == PETITION_PERMISSION_LOCATION) {
if (grantResults.length == 1
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Permission granted
startService(new Intent(MainActivity.this, GPSService.class));
} else {
//Permission denied:
Log.e("PETITION PERMISSION", "Permission denied");
}
}
}
private boolean isMyServiceRunning(Class<?> serviceClass) {
ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
if (serviceClass.getName().equals(service.service.getClassName())) {
return true;
}
}
return false;
}
public class Receiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(GPSService.ACTION)){
Log.e("onReceive","onReceive called");
dLatitude = intent.getDoubleExtra("latitude", 0);
dLongitude = intent.getDoubleExtra("longitude", 0);
Log.e("receiver", "Got Latitude: " + dLatitude);
Log.e("receiver", "Got Longitude: " + dLongitude);
}
}
}
}
我的清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="es.jjsr.newmygpsapp">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:name=".GlobalApplication"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".GPSService" android:process=":my_service" />
</application>
和Gradle
implementation 'com.google.android.gms:play-services-location:9.4.0'
非常感谢大家的帮助。
我正在学习很多东西。
我将代码保留在这里，以防我可以帮助需要它的人