Close scan screen when pairing and remove device when unpairing.

Close the scan screen after successful pairing, and remove a
device from the list of paired devices after unpairing.

As part of the fix, BluetoothSettings was refactored into a parent
class, DeviceListPreferenceFragment, and three subclasses for each
variant type: BluetoothSettings, BluetoothFindNearby, and
DevicePickerFragment, replacing the checks against mScreenType with
custom logic in the child classes.

Bug: 3325848
Change-Id: If64fddc3ba5b4f1136451491c7d5a1139b696e47

src/com/android/settings/bluetooth/DevicePickerFragment.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2011 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.bluetooth;
+
+import android.app.Activity;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothDevicePicker;
+import android.content.Intent;
+import android.util.Log;
+
+import com.android.settings.R;
+
+/**
+ * BluetoothSettings is the Settings screen for Bluetooth configuration and
+ * connection management.
+ */
+public class DevicePickerFragment extends DeviceListPreferenceFragment {
+
+    private static final String TAG = "BluetoothDevicePicker";
+
+    private boolean mNeedAuth;
+    private String mLaunchPackage;
+    private String mLaunchClass;
+
+    void addPreferencesForActivity(Activity activity) {
+        Intent intent = activity.getIntent();
+        mNeedAuth = intent.getBooleanExtra(BluetoothDevicePicker.EXTRA_NEED_AUTH, false);
+        mFilterType = intent.getIntExtra(BluetoothDevicePicker.EXTRA_FILTER_TYPE,
+                BluetoothDevicePicker.FILTER_TYPE_ALL);
+        mLaunchPackage = intent.getStringExtra(BluetoothDevicePicker.EXTRA_LAUNCH_PACKAGE);
+        mLaunchClass = intent.getStringExtra(BluetoothDevicePicker.EXTRA_LAUNCH_CLASS);
+
+        activity.setTitle(activity.getString(R.string.device_picker));
+        addPreferencesFromResource(R.xml.device_picker);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        addDevices();
+        mLocalManager.startScanning(true);
+    }
+
+    void onDevicePreferenceClick(BluetoothDevicePreference btPreference) {
+        mLocalManager.stopScanning();
+        mLocalManager.persistSelectedDeviceInPicker(mSelectedDevice.getAddress());
+        if ((btPreference.getCachedDevice().getBondState() ==
+                BluetoothDevice.BOND_BONDED) || !mNeedAuth) {
+            sendDevicePickedIntent(mSelectedDevice);
+            finish();
+        } else {
+            super.onDevicePreferenceClick(btPreference);
+        }
+    }
+
+    public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice,
+            int bondState) {
+        if (bondState == BluetoothDevice.BOND_BONDED) {
+            BluetoothDevice device = cachedDevice.getDevice();
+            if (device.equals(mSelectedDevice)) {
+                sendDevicePickedIntent(device);
+                finish();
+            }
+        }
+    }
+
+    void onBluetoothStateChanged(int bluetoothState) {
+        super.onBluetoothStateChanged(bluetoothState);
+
+        if (bluetoothState == BluetoothAdapter.STATE_ON) {
+                mLocalManager.startScanning(false);
+        }
+    }
+
+    void sendDevicePickedIntent(BluetoothDevice device) {
+        Intent intent = new Intent(BluetoothDevicePicker.ACTION_DEVICE_SELECTED);
+        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
+        if (mLaunchPackage != null && mLaunchClass != null) {
+            intent.setClassName(mLaunchPackage, mLaunchClass);
+        }
+        getActivity().sendBroadcast(intent);
+    }
+}