Question

我目前正在实施一项功能，要求用户忽略应用程序的电池优化。这样做的原因是，应用程序的主要功能不幸受到省电模式的严重影响。

为了实现我的目标，我通过创建Intent并将Action设置为ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS来提示用户。

虽然在触发Intent之前，我同时检查isPowerSaveMode()和isIgnoringBatteryOptimizations()，以确保在未启用省电模式时不提示用户;这是该功能的要求。我这样做的方式是：

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
boolean isPowerSaveMode = pm.isPowerSaveMode(); // always returns false for Huawei devices

这适用于大多数设备，但对于华为设备，isPowerSaveMode()始终返回false。因此，由于前提条件失败，因此永远不会显示提示。

还有其他人可能遇到过此问题吗？如果是这样，你做了什么来解决它？

请注意，Xamarin.Android SDK中也存在同样的问题。

Answer 1

每个oem都会修改SDK以满足他们的需求。华为设备不使用默认的省电功能，而是使用名为＆＃34; 受保护的应用＆＃34;。受保护的应用程序是一组应用程序，即使在屏幕关闭时也可以运行这些应用程序。这就是它总是返回false的原因。最好将意图投射到受保护的应用程序屏幕，但无法知道您的应用程序是否已添加到受保护的应用程序列表中。 What is protected apps ?

Answer 2

在实现手持设备和可穿戴设备时，我遇到了同样的问题。我找到的唯一解决方案是为所有应用禁用节电模式。我建议在禁用所有应用程序的此类模式后检测方法的结果。此错误仅出现在华为上。可怕的供应商。

Answer 3

我发现了一种通过向IntentFilter添加自定义操作来手动请求当前华为电源模式状态并接收 change 事件的方法：

（注意仅在 Huawei P20 Lite（ANE-LX3）@ EMUI 8.0.0 上进行了测试）

// Manually request Power Save Mode:
public Boolean isPowerSaveMode(Context context) {
    if (Build.MANUFACTURER.equalsIgnoreCase("Huawei")) {
        return isPowerSaveModeHuawei(context);
    } else {
        return isPowerSaveModeAndroid(context);
    }
}

@TargetApi(21)
private Boolean isPowerSaveModeAndroid(Context context) {
    boolean isPowerSaveMode = false;
    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        if (pm != null) isPowerSaveMode = pm.isPowerSaveMode();
    }
    return isPowerSaveMode;
}

private Boolean isPowerSaveModeHuawei(Context context) {
    try {
        int value = android.provider.Settings.System.getInt(context.getContentResolver(), "SmartModeStatus");
        return (value == 4);
    } catch (Settings.SettingNotFoundException e) {
        // Setting not found?  Return standard android mechanism and hope for the best...
        return isPowerSaveModeAndroid(context);
    }
}

// Listening for changes in Power Save Mode
public void startMonitoringPowerSaveChanges(Context context) {
    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        if (mPowerSaveChangeReceiver != null) {
            return;
        }
        // Register for PowerSaver change updates.
        mPowerSaveChangeReceiver = new PowerSaveChangeReceiver();

        // Registering the receiver
        IntentFilter filter = new IntentFilter();

        filter.addAction(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED);
        // Add custom huawei action
        filter.addAction("huawei.intent.action.POWER_MODE_CHANGED_ACTION");

        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            filter.addAction(android.provider.Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS);
        }
        context.registerReceiver(mPowerSaveChangeReceiver, filter);
    }
}

@TargetApi(21)
class PowerSaveChangeReceiver extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
        boolean isPowerSaveMode = false;

        // Oh, Huawei...why don't you play by the same rules as everyone else?
        if (intent.getAction().equals("huawei.intent.action.POWER_MODE_CHANGED_ACTION")) {
            Bundle extras = intent.getExtras();
            if ((extras != null) && extras.containsKey("state")) {
                int state = intent.getExtras().getInt("state");
                isPowerSaveMode = (state == 1);  // ON=1; OFF=2
            }
        } else {
            PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
            isPowerSaveMode = pm.isPowerSaveMode();
        }
        Log.d("MyTag", "[powersavechange] isPowerSaveMode? " + isPowerSaveMode);
    }
}

Answer 4

一些中文 ROM 像 Huawei 或 Xiaomi 没有实现省电模式查询的标准 API。但与其他系统设置一样，当用户打开/关闭省电模式时，状态标志将保存到数据库中。

所以我们可以利用这个状态标志来解决兼容性问题。切换省电模式时系统也会发送一个特定的意图，我们可以监听这个意图动作来监控节能模式的变化。

以下是 Huawei 或 Xiaomi 设备的详细 kotlin 代码实现。

object PowerManagerCompat {

    private const val TAG = "PowerManagerCompat"

    interface PowerSaveModeChangeListener {
        /**
         * will be called when power save mode change, new state can be query via [PowerManagerCompat.isPowerSaveMode]
         */
        fun onPowerSaveModeChanged()
    }

    private val POWER_SAVE_MODE_VALUES = mapOf(
            "HUAWEI" to 4,
            "XIAOMI" to 1
    )

    private val POWER_SAVE_MODE_SETTING_NAMES = arrayOf(
            "SmartModeStatus", // huawei setting name
            "POWER_SAVE_MODE_OPEN" // xiaomi setting name
    )

    private val POWER_SAVE_MODE_CHANGE_ACTIONS = arrayOf(
            "huawei.intent.action.POWER_MODE_CHANGED_ACTION",
            "miui.intent.action.POWER_SAVE_MODE_CHANGED"
    )

    private const val monitorViaBroadcast = true

    /**
     * Monitor power save mode change, only support following devices
     * * Xiaomi
     * * Huawei
     */
    fun monitorPowerSaveModeChange(context: Context, powerSaveModeChangeListener: PowerSaveModeChangeListener) {
        if (Build.MANUFACTURER.toUpperCase(Locale.getDefault()) !in POWER_SAVE_MODE_VALUES.keys) {
            Log.w(TAG, "monitorPowerSaveModeChange: doesn't know how to monitor power save mode change for ${Build.MANUFACTURER}")
        }
        if (monitorViaBroadcast) {
            context.registerReceiver(object : BroadcastReceiver() {
                override fun onReceive(context: Context?, intent: Intent?) {
                    powerSaveModeChangeListener.onPowerSaveModeChanged()
                }
            }, IntentFilter().also {
                for (a in POWER_SAVE_MODE_CHANGE_ACTIONS) {
                    it.addAction(a)
                }
            })
        } else {
            val contentObserver = object : ContentObserver(null) {
                override fun onChange(selfChange: Boolean) {
                    super.onChange(selfChange)
                    powerSaveModeChangeListener.onPowerSaveModeChanged()
                }
            }
            for (name in POWER_SAVE_MODE_SETTING_NAMES) {
                context.contentResolver.registerContentObserver(
                        Uri.parse("content://settings/system/${name}"), false, contentObserver)
            }
        }
    }

    /**
     * Check the system is currently in power save mode
     * @see [PowerManager.isPowerSaveMode]
     */
    fun isPowerSaveMode(context: Context): Boolean {
        if (Build.MANUFACTURER.toUpperCase(Locale.getDefault()) in POWER_SAVE_MODE_VALUES.keys) {
            return isPowerSaveModeCompat(context)
        }
        val powerManager = context.getSystemService(Context.POWER_SERVICE) as? PowerManager
        return powerManager?.isPowerSaveMode ?: false
    }

    private fun isPowerSaveModeCompat(context: Context): Boolean {
        for (name in POWER_SAVE_MODE_SETTING_NAMES) {
            val mode = Settings.System.getInt(context.contentResolver, name, -1)
            if (mode != -1) {
                return POWER_SAVE_MODE_VALUES[Build.MANUFACTURER.toUpperCase(Locale.getDefault())] == mode
            }
        }
        return false
    }
}

Answer 5

private void isPowerSaveModeHuaweiXiaomi(){
  if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")) {
    try {
       int value = android.provider.Settings.System.getInt(getContext().getContentResolver(), "POWER_SAVE_MODE_OPEN");

            } catch (Settings.SettingNotFoundException e) {
                Log.d("Valor modo bateria:", "Error");
            }
        }else if (Build.MANUFACTURER.equalsIgnoreCase("Huawei")){
            try {
                int value = android.provider.Settings.System.getInt(getContext().getContentResolver(), "SmartModeStatus");

            } catch (Settings.SettingNotFoundException e) {
                Log.d("Valor modo bateria:", "Error");
            }
        }
    }

isPowerSaveMode（）始终为华为设备

5 个答案: