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/*
* Copyright (C) 2015 The CyanogenMod 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.android.systemui.qs.tiles;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.nfc.NfcAdapter;
import android.util.Log;
import com.android.systemui.R;
import com.android.systemui.qs.QSTile;
import org.cyanogenmod.internal.logging.CMMetricsLogger;
import org.cyanogenmod.internal.util.QSUtils;
public class NfcTile extends QSTile<QSTile.BooleanState> {
private boolean mListening;
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
refreshState();
}
};
private final boolean mSupportsNfc;
public NfcTile(Host host) {
super(host);
mSupportsNfc = QSUtils.deviceSupportsNfc(mContext);
}
@Override
protected BooleanState newTileState() {
return new BooleanState();
}
@Override
protected void handleClick() {
boolean newState = !getState().value;
setState(newState);
refreshState();
}
@Override
protected void handleLongClick() {
mHost.startActivityDismissingKeyguard(new Intent("android.settings.NFC_SETTINGS"));
}
private void setState(boolean on) {
try {
NfcAdapter nfcAdapter = NfcAdapter.getNfcAdapter(mContext);
if (nfcAdapter == null) {
Log.e(TAG, "tried to set NFC state, but no NFC adapter was found");
return;
}
if (on) {
nfcAdapter.enable();
} else {
nfcAdapter.disable();
}
} catch (UnsupportedOperationException e) {
// ignore
}
}
private int getNfcAdapterState() {
try {
NfcAdapter nfcAdapter = NfcAdapter.getNfcAdapter(mContext);
if (nfcAdapter == null) {
Log.e(TAG, "tried to get NFC state, but no NFC adapter was found");
return NfcAdapter.STATE_OFF;
}
return nfcAdapter.getAdapterState();
} catch (UnsupportedOperationException e) {
// ignore
return NfcAdapter.STATE_OFF;
}
}
/**
* Helper method to encapsulate intermediate states (turning off/on) to help determine whether
* the adapter will be on or off.
* @param nfcState The current NFC adapter state.
* @return boolean representing what state the adapter is/will be in
*/
private static boolean isEnabled(int nfcState) {
switch (nfcState) {
case NfcAdapter.STATE_TURNING_ON:
case NfcAdapter.STATE_ON:
return true;
case NfcAdapter.STATE_TURNING_OFF:
case NfcAdapter.STATE_OFF:
default:
return false;
}
}
/**
* Helper method to determine intermediate states
* @param nfcState The current NFC adapter state.
* @return boolean representing if the adapter is in an intermediate state
*/
private static boolean isEnablingDisabling(int nfcState) {
switch (nfcState) {
case NfcAdapter.STATE_TURNING_OFF:
case NfcAdapter.STATE_TURNING_ON:
return true;
default:
return false;
}
}
@Override
protected void handleUpdateState(BooleanState state, Object arg) {
state.visible = mSupportsNfc;
final int nfcState = getNfcAdapterState();
state.value = mSupportsNfc && isEnabled(nfcState);
state.enabled = mSupportsNfc && !isEnablingDisabling(nfcState);
state.icon = ResourceIcon.get(state.value ?
R.drawable.ic_qs_nfc_on : R.drawable.ic_qs_nfc_off);
state.label = mContext.getString(R.string.quick_settings_nfc_label);
}
@Override
public int getMetricsCategory() {
return CMMetricsLogger.TILE_NFC;
}
@Override
public void setListening(boolean listening) {
if (mListening == listening) return;
mListening = listening;
if (listening) {
mContext.registerReceiver(mReceiver,
new IntentFilter(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED));
refreshState();
} else {
mContext.unregisterReceiver(mReceiver);
}
}
}
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