Introduce SelectUsbConfigPreferenceController

- Create new SelectUsbConfigController
 - Create controller inside the DashboardFragment
 - Port logic from DevelopmentSettings into the controller

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: I8d6b4eb2e8a90adb7f8bdf4aeec0f5929e8165b2

src/com/android/settings/development/SelectUsbConfigPreferenceController.java

@@ -0,0 +1,139 @@
+/*
+ * 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.settings.development;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.usb.UsbManager;
+import android.os.Bundle;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.ListPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.text.TextUtils;
+
+import com.android.settings.R;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnCreate;
+import com.android.settingslib.core.lifecycle.events.OnDestroy;
+
+public class SelectUsbConfigPreferenceController extends
+        DeveloperOptionsPreferenceController implements
+        Preference.OnPreferenceChangeListener, LifecycleObserver, OnCreate, OnDestroy {
+
+    private static final String USB_CONFIGURATION_KEY = "select_usb_configuration";
+
+    private final String[] mListValues;
+    private final String[] mListSummaries;
+    private final UsbManager mUsbManager;
+    private BroadcastReceiver mUsbReceiver;
+    private ListPreference mPreference;
+
+    public SelectUsbConfigPreferenceController(Context context, Lifecycle lifecycle) {
+        super(context);
+
+        mListValues = context.getResources().getStringArray(R.array.usb_configuration_values);
+        mListSummaries = context.getResources().getStringArray(R.array.usb_configuration_titles);
+        mUsbManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
+        mUsbReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                if (mPreference != null) {
+                    updateUsbConfigurationValues();
+                }
+            }
+        };
+        if (lifecycle != null) {
+            lifecycle.addObserver(this);
+        }
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(UsbManager.ACTION_USB_STATE);
+        mContext.registerReceiver(mUsbReceiver, filter);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return USB_CONFIGURATION_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        mPreference = (ListPreference) screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        writeUsbConfigurationOption(newValue.toString());
+        updateUsbConfigurationValues();
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        updateUsbConfigurationValues();
+    }
+
+    @Override
+    public void onDestroy() {
+        mContext.unregisterReceiver(mUsbReceiver);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        mPreference.setEnabled(false);
+    }
+
+    @VisibleForTesting
+    void setCurrentFunction(String newValue, boolean usbDataUnlocked) {
+        mUsbManager.setCurrentFunction(newValue, usbDataUnlocked);
+    }
+
+    private void updateUsbConfigurationValues() {
+        int index = 0;
+        for (int i = 0; i < mListValues.length; i++) {
+            if (mUsbManager.isFunctionEnabled(mListValues[i])) {
+                index = i;
+                break;
+            }
+        }
+        mPreference.setValue(mListValues[index]);
+        mPreference.setSummary(mListSummaries[index]);
+    }
+
+    private void writeUsbConfigurationOption(String newValue) {
+        if (TextUtils.equals(newValue, "none")) {
+            setCurrentFunction(newValue, false);
+        } else {
+            setCurrentFunction(newValue, true);
+        }
+    }
+
+}