NFC payment settings.

First version, pending final UX.

Change-Id: I357e900c3f2012b35814ae197c49a8c9b97b7148

src/com/android/settings/nfc/PaymentDefaultDialog.java

@@ -0,0 +1,144 @@
+/*
+ * 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.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.nfc.cardemulation.CardEmulationManager;
+import android.os.Bundle;
+import android.util.Log;
+
+import com.android.internal.app.AlertActivity;
+import com.android.internal.app.AlertController;
+import com.android.settings.R;
+import com.android.settings.nfc.PaymentBackend.PaymentAppInfo;
+
+import java.util.List;
+
+public final class PaymentDefaultDialog extends AlertActivity implements
+        DialogInterface.OnClickListener {
+
+    public static final String TAG = "PaymentDefaultDialog";
+
+    private PaymentBackend mBackend;
+    private ComponentName mNewDefault;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        mBackend = new PaymentBackend(this);
+        Intent intent = getIntent();
+        ComponentName component = intent.getParcelableExtra(
+                CardEmulationManager.EXTRA_SERVICE_COMPONENT);
+        String category = intent.getStringExtra(CardEmulationManager.EXTRA_CATEGORY);
+
+        if (!buildDialog(component, category)) {
+            finish();
+        }
+
+    }
+
+    @Override
+    public void onClick(DialogInterface dialog, int which) {
+        switch (which) {
+            case BUTTON_POSITIVE:
+                mBackend.setDefaultPaymentApp(mNewDefault);
+                mBackend.setAutoPaymentMode(true);
+                break;
+            case BUTTON_NEGATIVE:
+                break;
+        }
+    }
+
+    private boolean buildDialog(ComponentName component, String category) {
+        if (component == null || category == null) {
+            Log.e(TAG, "Component or category are null");
+            return false;
+        }
+
+        if (!CardEmulationManager.CATEGORY_PAYMENT.equals(category)) {
+            Log.e(TAG, "Don't support defaults for category " + category);
+            return false;
+        }
+
+        // Check if passed in service exists
+        boolean found = false;
+
+        List<PaymentAppInfo> services = mBackend.getPaymentAppInfos();
+        for (PaymentAppInfo service : services) {
+            if (component.equals(service.componentName)) {
+                found = true;
+                break;
+            }
+        }
+
+        if (!found) {
+            Log.e(TAG, "Component " + component + " is not a registered payment service.");
+            return false;
+        }
+
+        // Get current mode and default component
+        boolean isAuto = mBackend.isAutoPaymentMode();
+        ComponentName defaultComponent = mBackend.getDefaultPaymentApp();
+        if (defaultComponent != null && defaultComponent.equals(component)) {
+            Log.e(TAG, "Component " + component + " is already default.");
+            return false;
+        }
+
+        PackageManager pm = getPackageManager();
+        ApplicationInfo newAppInfo;
+        try {
+            newAppInfo = pm.getApplicationInfo(component.getPackageName(), 0);
+        } catch (NameNotFoundException e) {
+            Log.e(TAG, "PM could not load app info for " + component);
+            return false;
+        }
+        ApplicationInfo defaultAppInfo = null;
+        try {
+            if (defaultComponent != null) {
+                defaultAppInfo = pm.getApplicationInfo(defaultComponent.getPackageName(), 0);
+            }
+        } catch (NameNotFoundException e) {
+            Log.e(TAG, "PM could not load app info for " + defaultComponent);
+            // Continue intentionally
+        }
+
+        mNewDefault = component;
+
+        // Compose dialog; get
+        final AlertController.AlertParams p = mAlertParams;
+        p.mTitle = getString(R.string.nfc_payment_set_default);
+        if (defaultAppInfo == null || !isAuto) {
+            p.mMessage = "Always use " + newAppInfo.loadLabel(pm) + " when you tap and pay?";
+        } else {
+            p.mMessage = "Always use " + newAppInfo.loadLabel(pm) + " instead of " +
+                    defaultAppInfo.loadLabel(pm) + " when you tap and pay?";
+        }
+        p.mPositiveButtonText = getString(R.string.yes);
+        p.mNegativeButtonText = getString(R.string.no);
+        p.mPositiveButtonListener = this;
+        p.mNegativeButtonListener = this;
+        setupAlert();
+
+        return true;
+    }
+
+}