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This service connects to a remote system captions manager service. This service is responsible for enabling system captions when the user requests them. As the system binds to it, this service will be persistent. Cherry pick from ag/6761232 Bug: 128925852 Test: Manual. I created an implementation of the service. Merged-In: Iafde1bb68f4754d8167624f47c6833d43c0ec336 Change-Id: Iafde1bb68f4754d8167624f47c6833d43c0ec336
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| java_library_static { | ||
| name: "services.systemcaptions", | ||
| srcs: ["java/**/*.java"], | ||
| libs: ["services.core"], | ||
| } |
164 changes: 164 additions & 0 deletions
164
...emcaptions/java/com/android/server/systemcaptions/RemoteSystemCaptionsManagerService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| /* | ||
| * 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.server.systemcaptions; | ||
|
|
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| import android.annotation.Nullable; | ||
| import android.content.ComponentName; | ||
| import android.content.Context; | ||
| import android.content.Intent; | ||
| import android.content.ServiceConnection; | ||
| import android.os.Handler; | ||
| import android.os.IBinder; | ||
| import android.os.Looper; | ||
| import android.os.UserHandle; | ||
| import android.util.Slog; | ||
|
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| import com.android.internal.annotations.GuardedBy; | ||
|
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| /** Manages the connection to the remote system captions manager service. */ | ||
| final class RemoteSystemCaptionsManagerService { | ||
|
|
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| private static final String TAG = RemoteSystemCaptionsManagerService.class.getSimpleName(); | ||
|
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| private static final String SERVICE_INTERFACE = | ||
| "android.service.systemcaptions.SystemCaptionsManagerService"; | ||
|
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| private final Object mLock = new Object(); | ||
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| private final Context mContext; | ||
| private final Intent mIntent; | ||
| private final ComponentName mComponentName; | ||
| private final int mUserId; | ||
| private final boolean mVerbose; | ||
| private final Handler mHandler; | ||
|
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| private final RemoteServiceConnection mServiceConnection = new RemoteServiceConnection(); | ||
|
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| @GuardedBy("mLock") | ||
| @Nullable private IBinder mService; | ||
|
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| @GuardedBy("mLock") | ||
| private boolean mBinding = false; | ||
|
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| @GuardedBy("mLock") | ||
| private boolean mDestroyed = false; | ||
|
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| RemoteSystemCaptionsManagerService( | ||
| Context context, ComponentName componentName, int userId, boolean verbose) { | ||
| mContext = context; | ||
| mComponentName = componentName; | ||
| mUserId = userId; | ||
| mVerbose = verbose; | ||
| mIntent = new Intent(SERVICE_INTERFACE).setComponent(componentName); | ||
| mHandler = new Handler(Looper.getMainLooper()); | ||
| } | ||
|
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| void initialize() { | ||
| if (mVerbose) { | ||
| Slog.v(TAG, "initialize()"); | ||
| } | ||
| ensureBound(); | ||
| } | ||
|
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| void destroy() { | ||
| if (mVerbose) { | ||
| Slog.v(TAG, "destroy()"); | ||
| } | ||
|
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| synchronized (mLock) { | ||
| if (mDestroyed) { | ||
| if (mVerbose) { | ||
| Slog.v(TAG, "destroy(): Already destroyed"); | ||
| } | ||
| return; | ||
| } | ||
| mDestroyed = true; | ||
| ensureUnboundLocked(); | ||
| } | ||
| } | ||
|
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| boolean isDestroyed() { | ||
| synchronized (mLock) { | ||
| return mDestroyed; | ||
| } | ||
| } | ||
|
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| private void ensureBound() { | ||
| synchronized (mLock) { | ||
| if (mService != null || mBinding) { | ||
| return; | ||
| } | ||
|
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| if (mVerbose) { | ||
| Slog.v(TAG, "ensureBound(): binding"); | ||
| } | ||
| mBinding = true; | ||
|
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| int flags = Context.BIND_AUTO_CREATE | Context.BIND_FOREGROUND_SERVICE; | ||
| boolean willBind = mContext.bindServiceAsUser(mIntent, mServiceConnection, flags, | ||
| mHandler, new UserHandle(mUserId)); | ||
| if (!willBind) { | ||
| Slog.w(TAG, "Could not bind to " + mIntent + " with flags " + flags); | ||
| mBinding = false; | ||
| mService = null; | ||
| } | ||
| } | ||
| } | ||
|
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| @GuardedBy("mLock") | ||
| private void ensureUnboundLocked() { | ||
| if (mService == null && !mBinding) { | ||
| return; | ||
| } | ||
|
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| mBinding = false; | ||
| mService = null; | ||
|
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| if (mVerbose) { | ||
| Slog.v(TAG, "ensureUnbound(): unbinding"); | ||
| } | ||
| mContext.unbindService(mServiceConnection); | ||
| } | ||
|
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| private class RemoteServiceConnection implements ServiceConnection { | ||
| @Override | ||
| public void onServiceConnected(ComponentName name, IBinder service) { | ||
| synchronized (mLock) { | ||
| if (mVerbose) { | ||
| Slog.v(TAG, "onServiceConnected()"); | ||
| } | ||
| if (mDestroyed || !mBinding) { | ||
| Slog.wtf(TAG, "onServiceConnected() dispatched after unbindService"); | ||
| return; | ||
| } | ||
| mBinding = false; | ||
| mService = service; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void onServiceDisconnected(ComponentName name) { | ||
| synchronized (mLock) { | ||
| if (mVerbose) { | ||
| Slog.v(TAG, "onServiceDisconnected()"); | ||
| } | ||
| mBinding = true; | ||
| mService = null; | ||
| } | ||
| } | ||
| } | ||
| } |
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