Merge pull request #5617 from loki666:workmanager

PiperOrigin-RevId: 248533906

RELEASENOTES.md

@@ -14,6 +14,7 @@
   ([#5784](https://github.com/google/ExoPlayer/issues/5784)).
 * Add a workaround for broken raw audio decoding on Oppo R9
   ([#5782](https://github.com/google/ExoPlayer/issues/5782)).
+* Offline: Add Scheduler implementation which uses WorkManager.
 
 ### 2.10.1 ###
 

core_settings.gradle

@@ -38,6 +38,7 @@ include modulePrefix + 'extension-vp9'
 include modulePrefix + 'extension-rtmp'
 include modulePrefix + 'extension-leanback'
 include modulePrefix + 'extension-jobdispatcher'
+include modulePrefix + 'extension-workmanager'
 
 project(modulePrefix + 'library').projectDir = new File(rootDir, 'library/all')
 project(modulePrefix + 'library-core').projectDir = new File(rootDir, 'library/core')
@@ -60,3 +61,4 @@ project(modulePrefix + 'extension-vp9').projectDir = new File(rootDir, 'extensio
 project(modulePrefix + 'extension-rtmp').projectDir = new File(rootDir, 'extensions/rtmp')
 project(modulePrefix + 'extension-leanback').projectDir = new File(rootDir, 'extensions/leanback')
 project(modulePrefix + 'extension-jobdispatcher').projectDir = new File(rootDir, 'extensions/jobdispatcher')
+project(modulePrefix + 'extension-workmanager').projectDir = new File(rootDir, 'extensions/workmanager')

extensions/workmanager/README.md

@@ -0,0 +1,22 @@
+# ExoPlayer WorkManager extension
+
+This extension provides a Scheduler implementation which uses [WorkManager][].
+
+[WorkManager]: https://developer.android.com/topic/libraries/architecture/workmanager.html
+
+## Getting the extension
+
+The easiest way to use the extension is to add it as a gradle dependency:
+
+```gradle
+implementation 'com.google.android.exoplayer:extension-workmanager:2.X.X'
+```
+
+where `2.X.X` is the version, which must match the version of the ExoPlayer
+library being used.
+
+Alternatively, you can clone the ExoPlayer repository and depend on the module
+locally. Instructions for doing this can be found in ExoPlayer's
+[top level README][].
+
+[top level README]: https://github.com/google/ExoPlayer/blob/release-v2/README.md

extensions/workmanager/build.gradle

@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+apply from: '../../constants.gradle'
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion project.ext.compileSdkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    defaultConfig {
+        minSdkVersion project.ext.minSdkVersion
+        targetSdkVersion project.ext.targetSdkVersion
+    }
+
+    testOptions.unitTests.includeAndroidResources = true
+}
+
+dependencies {
+    implementation project(modulePrefix + 'library-core')
+    implementation 'androidx.work:work-runtime:2.0.1'
+}
+
+ext {
+    javadocTitle = 'WorkManager extension'
+}
+apply from: '../../javadoc_library.gradle'
+
+ext {
+    releaseArtifact = 'extension-workmanager'
+    releaseDescription = 'WorkManager extension for ExoPlayer.'
+}
+apply from: '../../publish.gradle'

extensions/workmanager/src/main/AndroidManifest.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ 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.
+  -->
+
+<manifest package="com.google.android.exoplayer2.ext.workmanager"/>

extensions/workmanager/src/main/java/com/google/android/exoplayer2/ext/workmanager/WorkManagerScheduler.java

@@ -0,0 +1,161 @@
+/*
+ * 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.google.android.exoplayer2.ext.workmanager;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.Intent;
+import androidx.work.Constraints;
+import androidx.work.Data;
+import androidx.work.ExistingWorkPolicy;
+import androidx.work.NetworkType;
+import androidx.work.OneTimeWorkRequest;
+import androidx.work.WorkManager;
+import androidx.work.Worker;
+import androidx.work.WorkerParameters;
+import com.google.android.exoplayer2.scheduler.Requirements;
+import com.google.android.exoplayer2.scheduler.Scheduler;
+import com.google.android.exoplayer2.util.Assertions;
+import com.google.android.exoplayer2.util.Log;
+import com.google.android.exoplayer2.util.Util;
+
+/** A {@link Scheduler} that uses {@link WorkManager}. */
+public final class WorkManagerScheduler implements Scheduler {
+
+  private static final boolean DEBUG = false;
+  private static final String TAG = "WorkManagerScheduler";
+  private static final String KEY_SERVICE_ACTION = "service_action";
+  private static final String KEY_SERVICE_PACKAGE = "service_package";
+  private static final String KEY_REQUIREMENTS = "requirements";
+
+  private final String workName;
+
+  /**
+   * @param workName A name for work scheduled by this instance. If the same name was used by a
+   *     previous instance, anything scheduled by the previous instance will be canceled by this
+   *     instance if {@link #schedule(Requirements, String, String)} or {@link #cancel()} are
+   *     called.
+   */
+  public WorkManagerScheduler(String workName) {
+    this.workName = workName;
+  }
+
+  @Override
+  public boolean schedule(Requirements requirements, String servicePackage, String serviceAction) {
+    Constraints constraints = buildConstraints(requirements);
+    Data inputData = buildInputData(requirements, servicePackage, serviceAction);
+    OneTimeWorkRequest workRequest = buildWorkRequest(constraints, inputData);
+    logd("Scheduling work: " + workName);
+    WorkManager.getInstance().enqueueUniqueWork(workName, ExistingWorkPolicy.REPLACE, workRequest);
+    return true;
+  }
+
+  @Override
+  public boolean cancel() {
+    logd("Canceling work: " + workName);
+    WorkManager.getInstance().cancelUniqueWork(workName);
+    return true;
+  }
+
+  private static Constraints buildConstraints(Requirements requirements) {
+    Constraints.Builder builder = new Constraints.Builder();
+
+    if (requirements.isUnmeteredNetworkRequired()) {
+      builder.setRequiredNetworkType(NetworkType.UNMETERED);
+    } else if (requirements.isNetworkRequired()) {
+      builder.setRequiredNetworkType(NetworkType.CONNECTED);
+    } else {
+      builder.setRequiredNetworkType(NetworkType.NOT_REQUIRED);
+    }
+
+    if (requirements.isChargingRequired()) {
+      builder.setRequiresCharging(true);
+    }
+
+    if (requirements.isIdleRequired() && Util.SDK_INT >= 23) {
+      setRequiresDeviceIdle(builder);
+    }
+
+    return builder.build();
+  }
+
+  @TargetApi(23)
+  private static void setRequiresDeviceIdle(Constraints.Builder builder) {
+    builder.setRequiresDeviceIdle(true);
+  }
+
+  private static Data buildInputData(
+      Requirements requirements, String servicePackage, String serviceAction) {
+    Data.Builder builder = new Data.Builder();
+
+    builder.putInt(KEY_REQUIREMENTS, requirements.getRequirements());
+    builder.putString(KEY_SERVICE_PACKAGE, servicePackage);
+    builder.putString(KEY_SERVICE_ACTION, serviceAction);
+
+    return builder.build();
+  }
+
+  private static OneTimeWorkRequest buildWorkRequest(Constraints constraints, Data inputData) {
+    OneTimeWorkRequest.Builder builder = new OneTimeWorkRequest.Builder(SchedulerWorker.class);
+
+    builder.setConstraints(constraints);
+    builder.setInputData(inputData);
+
+    return builder.build();
+  }
+
+  private static void logd(String message) {
+    if (DEBUG) {
+      Log.d(TAG, message);
+    }
+  }
+
+  /** A {@link Worker} that starts the target service if the requirements are met. */
+  // This class needs to be public so that WorkManager can instantiate it.
+  public static final class SchedulerWorker extends Worker {
+
+    private final WorkerParameters workerParams;
+    private final Context context;
+
+    public SchedulerWorker(Context context, WorkerParameters workerParams) {
+      super(context, workerParams);
+      this.workerParams = workerParams;
+      this.context = context;
+    }
+
+    @Override
+    public Result doWork() {
+      logd("SchedulerWorker is started");
+      Data inputData = workerParams.getInputData();
+      Assertions.checkNotNull(inputData, "Work started without input data.");
+      Requirements requirements = new Requirements(inputData.getInt(KEY_REQUIREMENTS, 0));
+      if (requirements.checkRequirements(context)) {
+        logd("Requirements are met");
+        String serviceAction = inputData.getString(KEY_SERVICE_ACTION);
+        String servicePackage = inputData.getString(KEY_SERVICE_PACKAGE);
+        Assertions.checkNotNull(serviceAction, "Service action missing.");
+        Assertions.checkNotNull(servicePackage, "Service package missing.");
+        Intent intent = new Intent(serviceAction).setPackage(servicePackage);
+        logd("Starting service action: " + serviceAction + " package: " + servicePackage);
+        Util.startForegroundService(context, intent);
+        return Result.success();
+      } else {
+        logd("Requirements are not met");
+        return Result.retry();
+      }
+    }
+  }
+}