1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.platform.test.rule 18 19 import android.media.AudioManager 20 import android.platform.uiautomatorhelpers.DeviceHelpers 21 import androidx.annotation.VisibleForTesting 22 import org.junit.runner.Description 23 24 /** This rule will set the default minimum volume on the device */ 25 class SetDefaultVolumeRule(private val volumeIndex: Int) : TestWatcher() { 26 private var mAudioManager = 27 DeviceHelpers.context.getSystemService(AudioManager::class.java) 28 ?: error("Can't get the AudioManager for ${SetDefaultVolumeRule::class}}") 29 startingnull30 override fun starting(description: Description) { 31 mAudioManager.setStreamVolume( 32 AudioManager.STREAM_MUSIC, 33 volumeIndex, 34 0, // Do nothing, prevent opening UI. 35 ) 36 } 37 38 @VisibleForTesting setAudioManagernull39 fun setAudioManager(audioManager: AudioManager) { 40 mAudioManager = audioManager 41 } 42 } 43