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/*
* Copyright (C) 2013 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.android.settings.nfc;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.nfc.NfcAdapter;
import android.nfc.cardemulation.ApduServiceInfo;
import android.nfc.cardemulation.CardEmulation;
import android.os.Handler;
import android.os.Message;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import com.android.internal.content.PackageMonitor;
import java.util.ArrayList;
import java.util.List;
public class PaymentBackend {
public static final String TAG = "Settings.PaymentBackend";
public interface Callback {
void onPaymentAppsChanged();
}
public static class PaymentAppInfo {
CharSequence label;
CharSequence description;
Drawable banner;
boolean isDefault;
public ComponentName componentName;
public ComponentName settingsComponent;
}
private final Context mContext;
private final NfcAdapter mAdapter;
private final CardEmulation mCardEmuManager;
private final PackageMonitor mSettingsPackageMonitor = new SettingsPackageMonitor();
// Fields below only modified on UI thread
private ArrayList<PaymentAppInfo> mAppInfos;
private PaymentAppInfo mDefaultAppInfo;
private ArrayList<Callback> mCallbacks = new ArrayList<Callback>();
public PaymentBackend(Context context) {
mContext = context;
mAdapter = NfcAdapter.getDefaultAdapter(context);
mCardEmuManager = CardEmulation.getInstance(mAdapter);
refresh();
}
public void onPause() {
mSettingsPackageMonitor.unregister();
}
public void onResume() {
mSettingsPackageMonitor.register(mContext, mContext.getMainLooper(), false);
}
public void refresh() {
PackageManager pm = mContext.getPackageManager();
List<ApduServiceInfo> serviceInfos =
mCardEmuManager.getServices(CardEmulation.CATEGORY_PAYMENT);
ArrayList<PaymentAppInfo> appInfos = new ArrayList<PaymentAppInfo>();
if (serviceInfos == null) {
makeCallbacks();
return;
}
ComponentName defaultAppName = getDefaultPaymentApp();
PaymentAppInfo foundDefaultApp = null;
for (ApduServiceInfo service : serviceInfos) {
PaymentAppInfo appInfo = new PaymentAppInfo();
appInfo.label = service.loadLabel(pm);
if (appInfo.label == null) {
appInfo.label = service.loadAppLabel(pm);
}
appInfo.isDefault = service.getComponent().equals(defaultAppName);
if (appInfo.isDefault) {
foundDefaultApp = appInfo;
}
appInfo.componentName = service.getComponent();
String settingsActivity = service.getSettingsActivityName();
if (settingsActivity != null) {
appInfo.settingsComponent = new ComponentName(appInfo.componentName.getPackageName(),
settingsActivity);
} else {
appInfo.settingsComponent = null;
}
appInfo.description = service.getDescription();
appInfo.banner = service.loadBanner(pm);
appInfos.add(appInfo);
}
mAppInfos = appInfos;
mDefaultAppInfo = foundDefaultApp;
makeCallbacks();
}
public void registerCallback(Callback callback) {
mCallbacks.add(callback);
}
public void unregisterCallback(Callback callback) {
mCallbacks.remove(callback);
}
public List<PaymentAppInfo> getPaymentAppInfos() {
return mAppInfos;
}
public PaymentAppInfo getDefaultApp() {
return mDefaultAppInfo;
}
void makeCallbacks() {
for (Callback callback : mCallbacks) {
callback.onPaymentAppsChanged();
}
}
Drawable loadDrawableForPackage(String pkgName, int drawableResId) {
PackageManager pm = mContext.getPackageManager();
try {
Resources res = pm.getResourcesForApplication(pkgName);
Drawable banner = res.getDrawable(drawableResId);
return banner;
} catch (Resources.NotFoundException e) {
return null;
} catch (PackageManager.NameNotFoundException e) {
return null;
}
}
boolean isForegroundMode() {
try {
return Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.NFC_PAYMENT_FOREGROUND) != 0;
} catch (SettingNotFoundException e) {
return false;
}
}
void setForegroundMode(boolean foreground) {
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.NFC_PAYMENT_FOREGROUND, foreground ? 1 : 0) ;
}
ComponentName getDefaultPaymentApp() {
String componentString = Settings.Secure.getString(mContext.getContentResolver(),
Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT);
if (componentString != null) {
return ComponentName.unflattenFromString(componentString);
} else {
return null;
}
}
public void setDefaultPaymentApp(ComponentName app) {
Settings.Secure.putString(mContext.getContentResolver(),
Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT,
app != null ? app.flattenToString() : null);
refresh();
}
private final Handler mHandler = new Handler() {
@Override
public void dispatchMessage(Message msg) {
refresh();
}
};
private class SettingsPackageMonitor extends PackageMonitor {
@Override
public void onPackageAdded(String packageName, int uid) {
mHandler.obtainMessage().sendToTarget();
}
@Override
public void onPackageAppeared(String packageName, int reason) {
mHandler.obtainMessage().sendToTarget();
}
@Override
public void onPackageDisappeared(String packageName, int reason) {
mHandler.obtainMessage().sendToTarget();
}
@Override
public void onPackageRemoved(String packageName, int uid) {
mHandler.obtainMessage().sendToTarget();
}
}
}