PowerManager.PARTIAL_WAKE_LOCK 的前台服务将进入睡眠状态

我尝试创建简单的计时器。根据文档 https://developer.android.com/training/scheduling/wakelock#cpu我有许可<uses-permission android:name="android.permission.WAKE_LOCK" />并在中使用此代码ForegroundService:

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, getString( R.string.app_name ) );
wl.acquire();

当屏幕关闭时，它适用于大多数设备，但某些设备，例如 Honor 10i (Android 10)，会在 10-15 秒后进入睡眠模式，并根据Handler在睡觉。

我尝试启动电池优化等，但这没有帮助。 怎么了？

笔记。如果函数在Handler发出“滴答”声，然后就可以正常工作了。

您应该使用 REQUEST_IGNORE_BATTERY_OPTIMIZATIONS 权限并忽略应用程序的电池优化。

AndroidManifest.xml

 <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />

然后在您的应用程序中调用以下方法

@RequiresApi(api = Build.VERSION_CODES.M)
private void ignoreBatteryOptimization() {
    Intent intent = new Intent();
    String packageName = getPackageName();
    PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    if (pm != null && !pm.isIgnoringBatteryOptimizations(packageName)) {
        intent.setAction(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS);
        intent.setData(Uri.parse("package:" + packageName));
        startActivity(intent);
    }
}

您还可以检查这个link https://androidboss.info/2021/10/23/android-application-ignore-battery-optimisation-programmatically/

对于荣耀10i（Android 10），您还可以检查以下方法。我在小米红米手机上测试过。希望它也适用于您列出的制造商。

public static List<Intent> POWER_MANAGER_INTENTS = Arrays.asList(
    new Intent().setComponent(new ComponentName("com.miui.securitycenter", "com.miui.permcenter.autostart.AutoStartManagementActivity")),
    new Intent().setComponent(new ComponentName("com.letv.android.letvsafe", "com.letv.android.letvsafe.AutobootManageActivity")),
    new Intent().setComponent(new ComponentName("com.huawei.systemmanager", "com.huawei.systemmanager.optimize.process.ProtectActivity")),
    new Intent().setComponent(new ComponentName("com.coloros.safecenter", "com.coloros.safecenter.permission.startup.StartupAppListActivity")),
    new Intent().setComponent(new ComponentName("com.coloros.safecenter", "com.coloros.safecenter.startupapp.StartupAppListActivity")),
    new Intent().setComponent(new ComponentName("com.oppo.safe", "com.oppo.safe.permission.startup.StartupAppListActivity")),
    new Intent().setComponent(new ComponentName("com.iqoo.secure", "com.iqoo.secure.ui.phoneoptimize.AddWhiteListActivity")),
    new Intent().setComponent(new ComponentName("com.iqoo.secure", "com.iqoo.secure.ui.phoneoptimize.BgStartUpManager")),
    new Intent().setComponent(new ComponentName("com.vivo.permissionmanager", "com.vivo.permissionmanager.activity.BgStartUpManagerActivity")),
    new Intent().setComponent(new ComponentName("com.asus.mobilemanager", "com.asus.mobilemanager.entry.FunctionActivity")).setData(android.net.Uri.parse("mobilemanager://function/entry/AutoStart")));

public static void startPowerSaverIntent(Context context) {
    SharedPreferences settings = context.getSharedPreferences("ProtectedApps", Context.MODE_PRIVATE);
    boolean skipMessage = settings.getBoolean("skipProtectedAppCheck", false);
    if (!skipMessage) {
        final SharedPreferences.Editor editor = settings.edit();
        boolean foundCorrectIntent = false;
        for (Intent intent : POWER_MANAGER_INTENTS) {
            if (isCallable(context, intent)) {
                foundCorrectIntent = true;
                final AppCompatCheckBox dontShowAgain = new AppCompatCheckBox(context);
                dontShowAgain.setText("Do not show again");
                dontShowAgain.setOnCheckedChangeListener((buttonView, isChecked) -> {
                    editor.putBoolean("skipProtectedAppCheck", isChecked);
                    editor.apply();
                });

                new AlertDialog.Builder(context)
                        .setTitle(Build.MANUFACTURER + " Protected Apps")
                        .setMessage(String.format("%s requires to be enabled in 'Protected Apps' to function properly.%n", context.getString(R.string.app_name)))
                        .setView(dontShowAgain)
                        .setPositiveButton("Go to settings", (dialog, which) -> context.startActivity(intent))
                        .setNegativeButton(android.R.string.cancel, null)
                        .show();
                break;
            }
        }
        if (!foundCorrectIntent) {
            editor.putBoolean("skipProtectedAppCheck", true);
            editor.apply();
        }
    }
}


private static boolean isCallable(Context context, Intent intent) {
    List<ResolveInfo> list = context.getPackageManager().queryIntentActivities(intent,
            PackageManager.MATCH_DEFAULT_ONLY);
    return list.size() > 0;
}

阅读全文，点击这里 https://androidboss.info/2021/11/03/how-to-enable-auto-start-permission-programmatically-for-customized-android-devices/.

或相关答案，点击这里 https://stackoverflow.com/a/47307864/5756788.