1 files changed, 46 insertions, 0 deletions
diff --git a/java/com/android/dialer/storage/StorageModule.java b/java/com/android/dialer/storage/StorageModule.java
new file mode 100644
index 000000000..8c97980c1
--- /dev/null
+++ b/java/com/android/dialer/storage/StorageModule.java
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+/*
+ * Copyright (C) 2017 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.dialer.storage;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import android.support.v4.content.ContextCompat;
+import com.android.dialer.inject.ApplicationContext;
+import dagger.Module;
+import dagger.Provides;
+import javax.inject.Singleton;
+
+/** Module for the storage component. */
+@Module
+public class StorageModule {
+
+  @Provides
+  @Singleton
+  @DeviceProtected
+  static SharedPreferences provideDeviceProtectedSharedPreferences(
+      @ApplicationContext Context appContext) {
+    // #createDeviceProtectedStorageContext returns a new context each time, so we cache the shared
+    // preferences object in order to avoid accessing disk for every operation.
+    Context deviceProtectedContext = ContextCompat.createDeviceProtectedStorageContext(appContext);
+
+    // ContextCompat.createDeviceProtectedStorageContext(context) returns null on pre-N, thus fall
+    // back to regular default shared preference for pre-N devices since devices protected context
+    // is not available.
+    return PreferenceManager.getDefaultSharedPreferences(
+        deviceProtectedContext != null ? deviceProtectedContext : appContext);
+  }
+}