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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.bluetoothadvertisements;
import android.bluetooth.le.AdvertiseCallback;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Switch;
import android.widget.Toast;
/**
* Allows user to start & stop Bluetooth LE Advertising of their device.
*/
public class AdvertiserFragment extends Fragment implements View.OnClickListener {
/**
* Lets user toggle BLE Advertising.
*/
private Switch mSwitch;
/**
* Listens for notifications that the {@code AdvertiserService} has failed to start advertising.
* This Receiver deals with Fragment UI elements and only needs to be active when the Fragment
* is on-screen, so it's defined and registered in code instead of the Manifest.
*/
private BroadcastReceiver advertisingFailureReceiver;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
advertisingFailureReceiver = new BroadcastReceiver() {
/**
* Receives Advertising error codes from {@code AdvertiserService} and displays error messages
* to the user. Sets the advertising toggle to 'false.'
*/
@Override
public void onReceive(Context context, Intent intent) {
int errorCode = intent.getIntExtra(AdvertiserService.ADVERTISING_FAILED_EXTRA_CODE, -1);
mSwitch.setChecked(false);
String errorMessage = getString(R.string.start_error_prefix);
switch (errorCode) {
case AdvertiseCallback.ADVERTISE_FAILED_ALREADY_STARTED:
errorMessage += " " + getString(R.string.start_error_already_started);
break;
case AdvertiseCallback.ADVERTISE_FAILED_DATA_TOO_LARGE:
errorMessage += " " + getString(R.string.start_error_too_large);
break;
case AdvertiseCallback.ADVERTISE_FAILED_FEATURE_UNSUPPORTED:
errorMessage += " " + getString(R.string.start_error_unsupported);
break;
case AdvertiseCallback.ADVERTISE_FAILED_INTERNAL_ERROR:
errorMessage += " " + getString(R.string.start_error_internal);
break;
case AdvertiseCallback.ADVERTISE_FAILED_TOO_MANY_ADVERTISERS:
errorMessage += " " + getString(R.string.start_error_too_many);
break;
case AdvertiserService.ADVERTISING_TIMED_OUT:
errorMessage = " " + getString(R.string.advertising_timedout);
break;
default:
errorMessage += " " + getString(R.string.start_error_unknown);
}
Toast.makeText(getActivity(), errorMessage, Toast.LENGTH_LONG).show();
}
};
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_advertiser, container, false);
mSwitch = (Switch) view.findViewById(R.id.advertise_switch);
mSwitch.setOnClickListener(this);
return view;
}
/**
* When app comes on screen, check if BLE Advertisements are running, set switch accordingly,
* and register the Receiver to be notified if Advertising fails.
*/
@Override
public void onResume() {
super.onResume();
if (AdvertiserService.running) {
mSwitch.setChecked(true);
} else {
mSwitch.setChecked(false);
}
IntentFilter failureFilter = new IntentFilter(AdvertiserService.ADVERTISING_FAILED);
getActivity().registerReceiver(advertisingFailureReceiver, failureFilter);
}
/**
* When app goes off screen, unregister the Advertising failure Receiver to stop memory leaks.
* (and because the app doesn't care if Advertising fails while the UI isn't active)
*/
@Override
public void onPause() {
super.onPause();
getActivity().unregisterReceiver(advertisingFailureReceiver);
}
/**
* Returns Intent addressed to the {@code AdvertiserService} class.
*/
private static Intent getServiceIntent(Context c) {
return new Intent(c, AdvertiserService.class);
}
/**
* Called when switch is toggled - starts or stops advertising.
*/
@Override
public void onClick(View v) {
// Is the toggle on?
boolean on = ((Switch) v).isChecked();
if (on) {
startAdvertising();
} else {
stopAdvertising();
}
}
/**
* Starts BLE Advertising by starting {@code AdvertiserService}.
*/
private void startAdvertising() {
Context c = getActivity();
c.startService(getServiceIntent(c));
}
/**
* Stops BLE Advertising by stopping {@code AdvertiserService}.
*/
private void stopAdvertising() {
Context c = getActivity();
c.stopService(getServiceIntent(c));
mSwitch.setChecked(false);
}
}
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