| /* |
| * Copyright (C) 2015 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 android.os; |
| |
| import android.annotation.IntDef; |
| import android.annotation.NonNull; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| |
| /** |
| * The HardwarePropertiesManager class provides a mechanism of accessing hardware state of a |
| * device: CPU, GPU and battery temperatures, CPU usage per core, fan speed, etc. |
| */ |
| public class HardwarePropertiesManager { |
| |
| private static final String TAG = HardwarePropertiesManager.class.getSimpleName(); |
| |
| private static native void nativeInit(); |
| |
| private static native float[] nativeGetFanSpeeds(); |
| private static native float[] nativeGetDeviceTemperatures(int type); |
| private static native CpuUsageInfo[] nativeGetCpuUsages(); |
| |
| @Retention(RetentionPolicy.SOURCE) |
| @IntDef({ |
| DEVICE_TEMPERATURE_CPU, DEVICE_TEMPERATURE_GPU, DEVICE_TEMPERATURE_BATTERY |
| }) |
| public @interface DeviceTemperatureType {} |
| |
| /** |
| * Device temperature types. These must match the values in |
| * frameworks/native/include/hardwareproperties/HardwarePropertiesManager.h |
| */ |
| /** Temperature of CPUs in Celsius. */ |
| public static final int DEVICE_TEMPERATURE_CPU = 0; |
| |
| /** Temperature of GPUs in Celsius. */ |
| public static final int DEVICE_TEMPERATURE_GPU = 1; |
| |
| /** Temperature of battery in Celsius. */ |
| public static final int DEVICE_TEMPERATURE_BATTERY = 2; |
| |
| /** @hide */ |
| public HardwarePropertiesManager() { |
| nativeInit(); |
| } |
| |
| /** |
| * Return an array of device temperatures in Celsius. |
| * |
| * @param type type of requested device temperature, one of {@link #DEVICE_TEMPERATURE_CPU}, |
| * {@link #DEVICE_TEMPERATURE_GPU} or {@link #DEVICE_TEMPERATURE_BATTERY}. |
| * @return an array of requested float device temperatures. |
| * Empty if platform doesn't provide the queried temperature. |
| * |
| * @throws IllegalArgumentException if an incorrect temperature type is queried. |
| */ |
| public @NonNull float[] getDeviceTemperatures(@DeviceTemperatureType int type) { |
| switch (type) { |
| case DEVICE_TEMPERATURE_CPU: |
| case DEVICE_TEMPERATURE_GPU: |
| case DEVICE_TEMPERATURE_BATTERY: |
| return nativeGetDeviceTemperatures(type); |
| default: |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| /** |
| * Return an array of CPU usage info for each core. |
| * |
| * @return an array of {@link android.os.CpuUsageInfo} for each core. |
| * Empty if CPU usage is not supported on this system. |
| */ |
| public @NonNull CpuUsageInfo[] getCpuUsages() { |
| return nativeGetCpuUsages(); |
| } |
| |
| /** |
| * Return an array of fan speeds in RPM. |
| * |
| * @return an arrat of float fan speeds. Empty if there is no fans or fan speed |
| * not supported on this system. |
| */ |
| public @NonNull float[] getFanSpeeds() { |
| return nativeGetFanSpeeds(); |
| } |
| } |