OnLocationChanged持续触发多次，并导致堆栈溢出。
这是进口：
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.*; //addon-google apis 19 google-play-services.jar to libs folder and import it via build path -> configure build path ->Add External Jars
这是LocationListener：
private LocationListener mLocationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.e(TAG, "onLocationChanged>>>>>>>>>>>>>>>>>>");
LatLong latLng = new LatLong(location.getLatitude(), location.getLongitude());
centerPoint = latLng; //assign to global current location
Log.e(TAG, "onLocationChanged>>>>>>>>>>>>>>>>>>centerPoint" + centerPoint);
currentSpeed = location.getSpeed();
Log.e(TAG, "onLocationChanged speed>>>>>>>>>>>>>>>>>>"+ currentSpeed);
Log.e(TAG, "onLocationChanged: PROVIDER:>>>>>>>>>>>>>>>>"+location.getProvider().toString());
// GPS location
if (location.getProvider().equals(LocationManager.GPS_PROVIDER)) {
Log.e(TAG, "onLocationChanged: GPS_PROVIDER>>>>>>>>>>>>>>>>");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
String statusString = "Unknown";
switch (status) {
case LocationProvider.OUT_OF_SERVICE:
statusString = "Out of service";
Log.e(TAG, "Out of service>>>>>>>>>>>>>>>>");
break;
case LocationProvider.TEMPORARILY_UNAVAILABLE:
statusString = "Temporary unavailable";
Log.e(TAG, "Temporary unavailable>>>>>>>>>>>>>>>>");
break;
case LocationProvider.AVAILABLE:
statusString = "Available";
Log.e(TAG, "AVAILABLE>>>>>>>>>>>>>>>>");
break;
}
Toast.makeText(
MainActivity.this,
String.format("Provider '%s' status: %s", provider, statusString),
Toast.LENGTH_SHORT)
.show();
}
@Override
public void onProviderEnabled(String provider) {
Toast.makeText(
MainActivity.this, String.format("Provider '%s' enabled", provider), Toast.LENGTH_SHORT).show();
// Remove strike-thru in label
if (provider.equals(LocationManager.GPS_PROVIDER)) {
Log.e(TAG, "GPS_PROVIDER>>>>>>>>>>>>>>>>");
}
if (provider.equals(LocationManager.NETWORK_PROVIDER)) {
Log.e(TAG, "NETWORK_PROVIDER>>>>>>>>>>>>>>>>");
}
}
@Override
public void onProviderDisabled(String provider) {
Toast.makeText(
MainActivity.this, String.format("Provider '%s' disabled", provider), Toast.LENGTH_SHORT).show();
// Set strike-thru in label and hide accuracy circle
if (provider.equals(LocationManager.GPS_PROVIDER)) {
Log.e(TAG, "onProviderDisabled: GPS_PROVIDER>>>>>>>>>>>>>>>>");
}
if (provider.equals(LocationManager.NETWORK_PROVIDER)) {
Log.e(TAG, "onProviderDisabled: NETWORK_PROVIDER>>>>>>>>>>>>>>>>");
}
}
};
/**
* Location Source for google maps 'my location' layer.
*/
private LocationSource mLocationSource = new LocationSource() {
@Override
public void activate(OnLocationChangedListener onLocationChangedListener) {
mOnLocationChangedListener = onLocationChangedListener;
}
@Override
public void deactivate() {
mOnLocationChangedListener = null;
}
};
这是logcat错误日志：
02-15 12:30:37.240: I/dalvikvm(9993): threadid=1: stack overflow on call to Ljava/lang/System;.arraycopy:VLILII
02-15 12:30:37.240: I/dalvikvm(9993): method requires 20+20+0=40 bytes, fp is 0xb028a324 (36 left)
02-15 12:30:37.240: I/dalvikvm(9993): expanding stack end (0xb028a300 to 0xb028a000)
02-15 12:30:37.240: I/dalvikvm(9993): Shrank stack (to 0xb028a300, curFrame is 0xb028fec4)
02-15 12:30:37.280: D/AndroidRuntime(9993): Shutting down VM
02-15 12:30:37.280: W/dalvikvm(9993): threadid=1: thread exiting with uncaught exception (group=0xb1a76b90)
02-15 12:30:37.520: E/AndroidRuntime(9993): FATAL EXCEPTION: main
02-15 12:30:37.520: E/AndroidRuntime(9993): Process: com.example.offlinemapsforgesample, PID: 9993
02-15 12:30:37.520: E/AndroidRuntime(9993): java.lang.StackOverflowError
02-15 12:30:37.520: E/AndroidRuntime(9993): at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:95)
02-15 12:30:37.520: E/AndroidRuntime(9993): at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:132)
02-15 12:30:37.520: E/AndroidRuntime(9993): at java.lang.RealToString.freeFormat(RealToString.java:232)
02-15 12:30:37.520: E/AndroidRuntime(9993): at java.lang.RealToString.convertDouble(RealToString.java:120)
02-15 12:30:37.520: E/AndroidRuntime(9993): at java.lang.RealToString.appendDouble(RealToString.java:63)
02-15 12:30:37.520: E/AndroidRuntime(9993): at java.lang.StringBuilder.append(StringBuilder.java:184)
02-15 12:30:37.520: E/AndroidRuntime(9993): at org.mapsforge.core.model.LatLong.toString(LatLong.java:99)
02-15 12:30:37.520: E/AndroidRuntime(9993): at java.lang.StringBuilder.append(StringBuilder.java:202)
02-15 12:30:37.520: E/AndroidRuntime(9993): at com.example.offlinemapsforgesample.MainActivity$2.onLocationChanged(MainActivity.java:1874)
02-15 12:30:37.520: E/AndroidRuntime(9993): at com.example.offlinemapsforgesample.MainActivity$2.onLocationChanged(MainActivity.java:1917)
02-15 12:30:37.520: E/AndroidRuntime(9993): at com.example.offlinemapsforgesample.MainActivity$2.onLocationChanged(MainActivity.java:1917)
02-15 12:30:37.520: E/AndroidRuntime(9993): at com.example.offlinemapsforgesample.MainActivity$2.onLocationChanged(MainActivity.java:1917)
02-15 12:30:37.520: E/AndroidRuntime(9993): at com.example.offlinemapsforgesample.MainActivity$2.onLocationChanged(MainActivity.java:1917)
02-15 12:30:37.520: E/AndroidRuntime(9993): at com.example.offlinemapsforgesample.MainActivity$2.onLocationChanged(MainActivity.java:1917)
02-15 12:30:37.520: E/AndroidRuntime(9993): at com.example.offlinemapsforgesample.MainActivity$2.onLocationChanged(MainActivity.java:1917)
最佳答案
根据doc，当新位置可用时，将调用onLocationChanged，因此当传感器（GPS，网络...）获得新位置时，这种情况会经常发生。为了防止出现这种情况，您可以将最新的位置存储在变量中，并借助Timer在最后存储的位置上执行业务逻辑。
否则，您可以使用GoogleApiClient执行此操作：
LocationRequest locationRequest = new LocationRequest();
locationRequest.setInterval(1000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());
根据您的堆栈跟踪，堆栈溢出不是来自
onLocationChanged，而是来自您编写在其中的业务逻辑。关于android - onLocationChanged触发多个时间并导致堆栈溢出，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/35415876/