[英]Prompt user with a popup for turning on GPS
因此,我注意到Google Map能夠提示用戶啟用GPS。 我在下面嘗試了此方法,卻一次又一次沒有得到提示...為什么不再調用onActivityResult()方法呢?
public void checkLocationEnable() {
Log.e(TAG, "Here");
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10000);
mLocationRequest.setFastestInterval(5000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequest);
final PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient,
builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(@NonNull LocationSettingsResult locationSettingsResult) {
final Status status = locationSettingsResult.getStatus();
final LocationSettingsStates state = locationSettingsResult.getLocationSettingsStates();
Log.e(TAG, "state:" + state);
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
Log.e(TAG, "HERE-1");
// All location settings are satisfied. The client can
// initialize location requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
Log.e(TAG, "REQUIRED");
// Location settings are not satisfied, but this can be fixed
// by showing the user a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(
getActivity(),
GenericActivity.REQUEST_LOCATION);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way
// to fix the settings so we won't show the dialog.
Log.e(TAG, "UNAVALAIBLE");
break;
}
}
});
}
據我了解,您嘗試啟用該位置。
逐步過程。
首先,您需要設置一個GoogleApiClient並實現GoogleApiClient CallBackMethods。
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
mGoogleApiClient.connect();
}
回調方法
@Override
public void onConnected(Bundle bundle) {
Log.d("OnConnected", "Connection successful");
settingsrequest();
}
@Override
public void onConnectionSuspended(int i) {
mGoogleApiClient.connect();
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + connectionResult.getErrorCode());
}
googleapiclient連接后,將立即調用onconnected方法,並調用settingsRequest方法。
protected static final int REQUEST_CHECK_SETTINGS = 0x1;
LocationRequest locationRequest;
public void settingsrequest() {
locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
locationRequest.setInterval(30 * 1000);
locationRequest.setNumUpdates(1);
locationRequest.setExpirationDuration(20000);
locationRequest.setFastestInterval(500);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest);
builder.setAlwaysShow(true); //this is the key ingredient
PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS: {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this);
}
// All location settings are satisfied. The client can initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the user
// a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(MainTab.this, REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
status.startResolutionForResult(MainTab.this,REQUEST_CHECK_SETTINGS)將顯示一個請求位置的對話框。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
// Check for the integer request code originally supplied to startResolutionForResult().
case REQUEST_CHECK_SETTINGS:
switch (resultCode) {
case Activity.RESULT_OK:
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this);
break;
case Activity.RESULT_CANCELED:
break;
}
break;
}
}
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,locationRequest,this)將為位置設置監聽器。
隨着位置的更改,onLocationChanged方法將被調用。
@Override
public void onLocationChanged(Location location) {
prevLocation = location;
//Do you work
}
希望這對您有幫助。
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