Create preference controller for each tethering option

These controllers are responsible for persisting preference values and managing the visibility and switch state. TetherEnabler will be listening to changes of shared prefernce values and turn on/off corresponding type of tethering when tethering is on at that time. Bug: 146582865 Test: tests are created for each controller class. Change-Id: I7e601b2bd693da59269517d2988bade7475e7f12
2019-12-20 17:44:26 -08:00
parent faa90620b2
commit a990206ee7
8 changed files with 852 additions and 48 deletions
--- a/src/com/android/settings/network/BluetoothTetherPreferenceController.java
+++ b/src/com/android/settings/network/BluetoothTetherPreferenceController.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2019 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.network;
+
+import android.bluetooth.BluetoothAdapter;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.SharedPreferences;
+import android.net.ConnectivityManager;
+import android.text.TextUtils;
+import android.util.Log;
+
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleObserver;
+import androidx.lifecycle.OnLifecycleEvent;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import com.android.settingslib.core.AbstractPreferenceController;
+
+import com.google.common.annotations.VisibleForTesting;
+
+/**
+ * This controller helps to manage the switch state and visibility of bluetooth tether switch
+ * preference. It stores preference value when preference changed.
+ * TODO(b/147272749): Extend BasePreferenceController.java instead.
+ */
+public final class BluetoothTetherPreferenceController extends AbstractPreferenceController
+        implements LifecycleObserver, Preference.OnPreferenceChangeListener {
+
+    private static final String TAG = "BluetoothTetherPreferenceController";
+    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
+    @VisibleForTesting
+    static final String PREF_KEY = "enable_bluetooth_tethering";
+    private final ConnectivityManager mCm;
+    private int mBluetoothState;
+    private Preference mPreference;
+    private final SharedPreferences mSharedPreferences;
+
+    public BluetoothTetherPreferenceController(Context context, Lifecycle lifecycle) {
+        super(context);
+        mCm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+        mSharedPreferences =
+                context.getSharedPreferences(TetherEnabler.SHARED_PREF, Context.MODE_PRIVATE);
+        if (lifecycle != null) {
+            lifecycle.addObserver(this);
+        }
+    }
+
+    @OnLifecycleEvent(Lifecycle.Event.ON_START)
+    public void onStart() {
+        mBluetoothState = BluetoothAdapter.getDefaultAdapter().getState();
+        mContext.registerReceiver(mBluetoothChangeReceiver,
+                new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
+    }
+
+    @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
+    public void onStop() {
+        mContext.unregisterReceiver(mBluetoothChangeReceiver);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        final String[] bluetoothRegexs = mCm.getTetherableBluetoothRegexs();
+        return bluetoothRegexs != null && bluetoothRegexs.length > 0;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(PREF_KEY);
+        if (mPreference != null && mPreference instanceof SwitchPreference) {
+            ((SwitchPreference) mPreference)
+                    .setChecked(mSharedPreferences.getBoolean(PREF_KEY, false));
+        }
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        switch (mBluetoothState) {
+            case BluetoothAdapter.STATE_ON:
+            case BluetoothAdapter.STATE_OFF:
+                // fall through.
+            case BluetoothAdapter.ERROR:
+                preference.setEnabled(true);
+                break;
+            case BluetoothAdapter.STATE_TURNING_OFF:
+            case BluetoothAdapter.STATE_TURNING_ON:
+                // fall through.
+            default:
+                preference.setEnabled(false);
+        }
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREF_KEY;
+    }
+
+    @VisibleForTesting
+    final BroadcastReceiver mBluetoothChangeReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (TextUtils.equals(BluetoothAdapter.ACTION_STATE_CHANGED, intent.getAction())) {
+                mBluetoothState =
+                        intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
+                updateState(mPreference);
+            }
+        }
+    };
+
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object o) {
+        if (DEBUG) {
+            Log.d(TAG, "preference changing to " + o);
+        }
+        final SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(PREF_KEY, (Boolean) o);
+        editor.apply();
+        return true;
+    }
+}