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| 1 | +/* |
| 2 | + * Copyright (C) 2015 The CyanogenMod Project |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + */ |
| 16 | + |
| 17 | +package com.android.systemui.qs.tiles; |
| 18 | + |
| 19 | +import android.content.BroadcastReceiver; |
| 20 | +import android.content.Context; |
| 21 | +import android.content.Intent; |
| 22 | +import android.content.IntentFilter; |
| 23 | +import android.nfc.NfcAdapter; |
| 24 | + |
| 25 | +import android.util.Log; |
| 26 | +import com.android.systemui.R; |
| 27 | +import com.android.systemui.qs.QSTile; |
| 28 | +import com.android.internal.logging.MetricsProto.MetricsEvent; |
| 29 | +import org.cyanogenmod.internal.util.QSUtils; |
| 30 | + |
| 31 | +public class NfcTile extends QSTile<QSTile.BooleanState> { |
| 32 | + |
| 33 | + private boolean mListening; |
| 34 | + |
| 35 | + private BroadcastReceiver mReceiver = new BroadcastReceiver() { |
| 36 | + @Override |
| 37 | + public void onReceive(Context context, Intent intent) { |
| 38 | + refreshState(); |
| 39 | + } |
| 40 | + }; |
| 41 | + |
| 42 | + public NfcTile(Host host) { |
| 43 | + super(host); |
| 44 | + isAvailable(); |
| 45 | + } |
| 46 | + |
| 47 | + @Override |
| 48 | + public BooleanState newTileState() { |
| 49 | + return new BooleanState(); |
| 50 | + } |
| 51 | + |
| 52 | + @Override |
| 53 | + protected void handleClick() { |
| 54 | + boolean newState = !getState().value; |
| 55 | + setState(newState); |
| 56 | + refreshState(); |
| 57 | + } |
| 58 | + |
| 59 | + @Override |
| 60 | + protected void handleLongClick() { |
| 61 | + mHost.startActivityDismissingKeyguard(new Intent("android.settings.NFC_SETTINGS")); |
| 62 | + } |
| 63 | + |
| 64 | + private void setState(boolean on) { |
| 65 | + try { |
| 66 | + NfcAdapter nfcAdapter = NfcAdapter.getNfcAdapter(mContext); |
| 67 | + if (nfcAdapter == null) { |
| 68 | + Log.e(TAG, "tried to set NFC state, but no NFC adapter was found"); |
| 69 | + return; |
| 70 | + } |
| 71 | + if (on) { |
| 72 | + nfcAdapter.enable(); |
| 73 | + } else { |
| 74 | + nfcAdapter.disable(); |
| 75 | + } |
| 76 | + } catch (UnsupportedOperationException e) { |
| 77 | + // ignore |
| 78 | + } |
| 79 | + } |
| 80 | + |
| 81 | + private int getNfcAdapterState() { |
| 82 | + try { |
| 83 | + NfcAdapter nfcAdapter = NfcAdapter.getNfcAdapter(mContext); |
| 84 | + if (nfcAdapter == null) { |
| 85 | + Log.e(TAG, "tried to get NFC state, but no NFC adapter was found"); |
| 86 | + return NfcAdapter.STATE_OFF; |
| 87 | + } |
| 88 | + return nfcAdapter.getAdapterState(); |
| 89 | + } catch (UnsupportedOperationException e) { |
| 90 | + // ignore |
| 91 | + return NfcAdapter.STATE_OFF; |
| 92 | + } |
| 93 | + } |
| 94 | + |
| 95 | + /** |
| 96 | + * Helper method to encapsulate intermediate states (turning off/on) to help determine whether |
| 97 | + * the adapter will be on or off. |
| 98 | + * @param nfcState The current NFC adapter state. |
| 99 | + * @return boolean representing what state the adapter is/will be in |
| 100 | + */ |
| 101 | + private static boolean isEnabled(int nfcState) { |
| 102 | + switch (nfcState) { |
| 103 | + case NfcAdapter.STATE_TURNING_ON: |
| 104 | + case NfcAdapter.STATE_ON: |
| 105 | + return true; |
| 106 | + case NfcAdapter.STATE_TURNING_OFF: |
| 107 | + case NfcAdapter.STATE_OFF: |
| 108 | + default: |
| 109 | + return false; |
| 110 | + } |
| 111 | + } |
| 112 | + |
| 113 | + @Override |
| 114 | + public Intent getLongClickIntent() { |
| 115 | + return null; |
| 116 | + } |
| 117 | + |
| 118 | + @Override |
| 119 | + public CharSequence getTileLabel() { |
| 120 | + return mContext.getString(R.string.quick_settings_nfc_label); |
| 121 | + } |
| 122 | + |
| 123 | + @Override |
| 124 | + protected void handleUpdateState(BooleanState state, Object arg) { |
| 125 | + final int nfcState = getNfcAdapterState(); |
| 126 | + state.value = isAvailable() && isEnabled(nfcState); |
| 127 | + |
| 128 | + state.icon = ResourceIcon.get(state.value ? |
| 129 | + R.drawable.ic_qs_nfc_on : R.drawable.ic_qs_nfc_off); |
| 130 | + state.label = mContext.getString(R.string.quick_settings_nfc_label); |
| 131 | + } |
| 132 | + |
| 133 | + @Override |
| 134 | + public int getMetricsCategory() { |
| 135 | + return MetricsEvent.QUICK_SETTINGS; |
| 136 | + } |
| 137 | + |
| 138 | + @Override |
| 139 | + public void setListening(boolean listening) { |
| 140 | + if (mListening == listening) return; |
| 141 | + mListening = listening; |
| 142 | + if (listening) { |
| 143 | + mContext.registerReceiver(mReceiver, |
| 144 | + new IntentFilter(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED)); |
| 145 | + refreshState(); |
| 146 | + } else { |
| 147 | + mContext.unregisterReceiver(mReceiver); |
| 148 | + } |
| 149 | + } |
| 150 | + |
| 151 | + @Override |
| 152 | + public boolean isAvailable() { |
| 153 | + return QSUtils.deviceSupportsNfc(mContext); |
| 154 | + } |
| 155 | +} |
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