80 lines
2.3 KiB
Java
80 lines
2.3 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.internal.telephony;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.database.ContentObserver;
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import android.net.Uri;
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import android.os.Handler;
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import com.android.telephony.Rlog;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* The class to describe settings observer
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*/
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public class SettingsObserver extends ContentObserver {
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private final Map<Uri, Integer> mUriEventMap;
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private final Context mContext;
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private final Handler mHandler;
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private static final String TAG = "SettingsObserver";
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public SettingsObserver(Context context, Handler handler) {
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super(null);
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mUriEventMap = new HashMap<>();
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mContext = context;
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mHandler = handler;
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}
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/**
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* Start observing a content.
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* @param uri Content URI
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* @param what The event to fire if the content changes
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*/
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public void observe(Uri uri, int what) {
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mUriEventMap.put(uri, what);
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final ContentResolver resolver = mContext.getContentResolver();
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resolver.registerContentObserver(uri, false, this);
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}
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/**
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* Stop observing a content.
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*/
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public void unobserve() {
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final ContentResolver resolver = mContext.getContentResolver();
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resolver.unregisterContentObserver(this);
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}
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@Override
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public void onChange(boolean selfChange) {
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Rlog.e(TAG, "Should never be reached.");
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}
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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final Integer what = mUriEventMap.get(uri);
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if (what != null) {
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mHandler.obtainMessage(what.intValue()).sendToTarget();
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} else {
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Rlog.e(TAG, "No matching event to send for URI=" + uri);
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}
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}
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}
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