Implemented NFC Quick Settings tile

res/layout/quick_settings_tile_nfc.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2012 The Android Open Source Project
+     Copyright (C) 2013 Peter Gregus for GravityBox Project (C3C076@xda)
+
+     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.
+-->
+<TextView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/TextAppearance.QuickSettings.TileView"
+    android:id="@+id/nfc_tileview"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:gravity="center" />

res/values/arrays.xml

@@ -83,6 +83,7 @@
         <item>@string/qs_tile_bluetooth</item>
         <item>@string/qs_tile_gps</item>
         <item>@string/qs_tile_gps_alt</item>
+        <item>@string/qs_tile_nfc</item>
         <item>@string/qs_tile_mobile_data</item>
         <item>@string/qs_tile_network_mode</item>
         <item>@string/qs_tile_data_usage</item>
@@ -113,6 +114,7 @@
         <item>bluetooth_textview</item>
         <item>gps_textview</item>
         <item>gps_tileview</item>
+        <item>nfc_tileview</item>
         <item>data_conn_textview</item>
         <item>network_mode_tileview</item>
         <item>rssi_textview</item>
@@ -145,6 +147,7 @@
         <item>@string/qs_tile_airplane_mode</item>
         <item>@string/qs_tile_bluetooth</item>
         <item>@string/qs_tile_gps</item>
+        <item>@string/qs_tile_nfc</item>
         <item>@string/qs_tile_ringer_mode</item>
         <item>@string/qs_tile_volume</item>
         <item>@string/qs_tile_network_mode</item>
@@ -171,6 +174,7 @@
         <item>airplane_mode_textview</item>
         <item>bluetooth_textview</item>
         <item>gps_tileview</item>
+        <item>nfc_tileview</item>
         <item>ringer_mode_tileview</item>
         <item>volume_tileview</item>
         <item>network_mode_tileview</item>

res/values/strings.xml

@@ -99,6 +99,8 @@
     <string name="quick_settings_wifi_off">Wi-Fi off</string>
     <string name="quick_settings_wifi_not_connected">Not connected</string>
     <string name="quick_settings_wifi_turning_on">Turning on&#8230;</string>
+    <string name="quick_settings_nfc">NFC</string>
+    <string name="quick_settings_nfc_off">NFC off</string>
 
     <!--  QuickSettings settings -->
     <string name="quick_settings_title">Statusbar QuickSettings tiles</string>
@@ -129,6 +131,7 @@
     <string name="qs_tile_expanded_desktop">Expanded desktop</string>
     <string name="qs_tile_stay_awake">Stay awake</string>
     <string name="qs_tile_screenshot">Screenshot</string>
+    <string name="qs_tile_nfc">NFC</string>
 
     <!-- Color Picker -->
     <string name="dialog_color_picker">Color Picker</string>

src/com/ceco/gm2/gravitybox/ModQuickSettings.java

@@ -31,6 +31,7 @@
 import com.ceco.gm2.gravitybox.quicksettings.ExpandedDesktopTile;
 import com.ceco.gm2.gravitybox.quicksettings.GpsTile;
 import com.ceco.gm2.gravitybox.quicksettings.NetworkModeTile;
+import com.ceco.gm2.gravitybox.quicksettings.NfcTile;
 import com.ceco.gm2.gravitybox.quicksettings.QuickAppTile;
 import com.ceco.gm2.gravitybox.quicksettings.QuickRecordTile;
 import com.ceco.gm2.gravitybox.quicksettings.RingerModeTile;
@@ -152,7 +153,8 @@ public class ModQuickSettings {
             R.id.stay_awake_tileview,
             R.id.screenshot_tileview,
             R.id.gps_tileview,
-            R.id.ringer_mode_tileview
+            R.id.ringer_mode_tileview,
+            R.id.nfc_tileview
         ));
         if (Utils.isMtkDevice()) {
             mCustomGbTileKeys.add(R.id.wifi_tileview);
@@ -594,6 +596,12 @@ protected void afterHookedMethod(final MethodHookParam param) throws Throwable {
                     gpsTile.setupQuickSettingsTile(mContainerView, inflater, mPrefs);
                     mTiles.add(gpsTile);
                 }
+
+                if (Utils.hasNFC(mContext)) {
+                    NfcTile nfcTile = new NfcTile(mContext, mGbContext, mStatusBar, mPanelBar);
+                    nfcTile.setupQuickSettingsTile(mContainerView, inflater);
+                    mTiles.add(nfcTile);
+                }
 
                 RingerModeTile rmTile = new RingerModeTile(mContext, mGbContext, mStatusBar, mPanelBar);
                 rmTile.setupQuickSettingsTile(mContainerView, inflater, mPrefs);

src/com/ceco/gm2/gravitybox/Utils.java

@@ -52,6 +52,7 @@ public class Utils {
     private static Boolean mHasVibrator = null;
     private static Boolean mHasFlash = null;
     private static Boolean mHasGPS = null;
+    private static Boolean mHasNFC = null;
 
     // Supported MTK devices
     private static final Set<String> MTK_DEVICES = new HashSet<String>(Arrays.asList(
@@ -214,6 +215,20 @@ public static boolean hasGPS(Context con) {
         }
     }
 
+    public static boolean hasNFC(Context con) {
+        if (mHasNFC != null) return mHasNFC;
+        PackageManager pm = con.getPackageManager();
+        if (pm == null) {
+            if (DEBUG) log("Cannot get package manager, assuming no NFC feature");
+            mHasNFC = null;
+            return false;
+        }
+
+        mHasNFC = pm.hasSystemFeature(PackageManager.FEATURE_NFC);
+
+        return mHasNFC;
+    }
+
     public static String getDeviceCharacteristics() {
         if (mDeviceCharacteristics != null) return mDeviceCharacteristics;
 

src/com/ceco/gm2/gravitybox/quicksettings/NfcTile.java

@@ -0,0 +1,160 @@
+package com.ceco.gm2.gravitybox.quicksettings;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.nfc.NfcAdapter;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.TextView;
+
+import com.ceco.gm2.gravitybox.R;
+
+import de.robv.android.xposed.XposedHelpers;
+
+public class NfcTile extends AQuickSettingsTile {
+
+    private static final String INTENT_ADAPTER_STATE_CHANGED = "android.nfc.action.ADAPTER_STATE_CHANGED";
+    private static final String INTENT_NFC_SETTINGS = "android.settings.NFC_SETTINGS";
+
+    private static final int STATE_TURNING_ON = XposedHelpers.getStaticIntField(NfcAdapter.class, "STATE_TURNING_ON");
+    private static final int STATE_ON = XposedHelpers.getStaticIntField(NfcAdapter.class, "STATE_ON");
+    @SuppressWarnings("unused")
+    private static final int STATE_TURNING_OFF = XposedHelpers.getStaticIntField(NfcAdapter.class, "STATE_TURNING_OFF");
+    private static final int STATE_OFF = XposedHelpers.getStaticIntField(NfcAdapter.class, "STATE_OFF");
+    private static final int NFC_ADAPTER_UNKNOWN = -100;
+
+    @SuppressWarnings("unused")
+    private static final String TAG = "GB:NfcTile";
+
+    private static NfcAdapter mNfcAdapter = null;
+
+    private BroadcastReceiver mNfcStateChangedReceiver = new BroadcastReceiver() {
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (INTENT_ADAPTER_STATE_CHANGED.equals(intent.getAction())) {
+                if (mNfcAdapter == null)
+                    getNfcAdapter(true);
+                updateTile(getNfcState());
+            }
+        }
+    };
+
+    private TextView mTextView;
+
+    public NfcTile(Context context, Context gbContext, Object statusBar, Object panelBar) {
+        super(context, gbContext, statusBar, panelBar);
+
+        mOnClick = new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                toggleState();
+            }
+        };
+
+        mOnLongClick = new View.OnLongClickListener() {
+
+            @Override
+            public boolean onLongClick(View v) {
+                Intent intent = new Intent(INTENT_NFC_SETTINGS);
+                intent.addCategory(Intent.CATEGORY_DEFAULT);
+                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                startActivity(intent);
+                return true;
+            }
+        };
+    }
+
+    private void toggleState() {
+        int state = getNfcState();
+        /* For some reason, a switch-case way of handling this didn't work */
+
+        if (mNfcAdapter == null)
+            getNfcAdapter(true);
+
+        if (mNfcAdapter == null) {
+            return;
+        }
+
+        if (state == STATE_TURNING_ON || state == STATE_ON)
+            XposedHelpers.callMethod(mNfcAdapter, "disable");
+        else
+            XposedHelpers.callMethod(mNfcAdapter, "enable");
+
+        updateTile();
+    }
+
+    @Override
+    protected void onTileCreate() {
+        LayoutInflater inflater = LayoutInflater.from(mGbContext);
+        inflater.inflate(R.layout.quick_settings_tile_nfc, mTile);
+        mTextView = (TextView) mTile.findViewById(R.id.nfc_tileview);
+
+        mTextView.setText(mLabel);
+        mTextView.setCompoundDrawablesWithIntrinsicBounds(0, mDrawableId, 0, 0);
+    }
+
+    @Override
+    protected void updateTile() {
+        updateTile(getNfcState());
+    }
+
+    private void updateTile(int state) {
+        if (state == STATE_TURNING_ON || state == STATE_ON) {
+            mDrawableId = R.drawable.ic_qs_nfc_on;
+            mLabel = mGbContext.getString(R.string.quick_settings_nfc);
+        } else {
+            mDrawableId = R.drawable.ic_qs_nfc_off;
+            mLabel = mGbContext.getString(R.string.quick_settings_nfc_off);
+        }
+
+        if (mTextView != null) {
+            mTextView.setText(mLabel);
+            mTextView.setCompoundDrawablesWithIntrinsicBounds(0, mDrawableId, 0, 0);
+        }
+    }
+
+    private int getNfcState() {
+        int state = STATE_OFF;
+        try {
+            getNfcAdapter(false);
+        } catch (UnsupportedOperationException e) {
+            state = NFC_ADAPTER_UNKNOWN;
+        }
+
+        if (mNfcAdapter != null)
+            state = (Integer) XposedHelpers.callMethod(mNfcAdapter, "getAdapterState");
+
+        return state;
+    }
+
+    @Override
+    protected void onTilePostCreate() {
+        mContext.registerReceiver(mNfcStateChangedReceiver,
+                new IntentFilter(INTENT_ADAPTER_STATE_CHANGED));
+
+        super.onTilePostCreate();
+    }
+
+    private void getNfcAdapter(boolean suppressThrow) throws UnsupportedOperationException {
+        Class<?> ServiceManager;
+        try {
+            ServiceManager = Class.forName("android.os.ServiceManager");
+        } catch (ClassNotFoundException e1) {
+            e1.printStackTrace();
+            return;
+        }
+
+        if (mNfcAdapter == null && XposedHelpers.callStaticMethod(ServiceManager, "getService", "nfc") != null) {
+            try {
+                mNfcAdapter = NfcAdapter.getDefaultAdapter(mContext);
+            } catch (UnsupportedOperationException e) {
+                if (!suppressThrow)
+                    throw e;
+            }
+        }
+    }
+}