在我的应用程序中，我注册了一个广播接收器来接收系统 Intent ACTION_DEVICE_STORAGE_LOW。我期待只要手机内存不足就会广播这个。因此，我下载了一些额外的应用程序(我的手机内存非常小)，导致操作系统显示系统内存不足的通知。手机剩余 10 - 15 MB。但是，我的广播接收器从未收到过该 Intent 。然而，系统通知一直停留在通知栏，内存不足无法上网。

每当显示内存不足通知时，是否应该广播此 Intent ？或者是否有一些更低的内存阈值会发送我尚未在手机上播放的广播？在文档中，它只说“广播操作:表明设备内存不足的粘性广播”。因为它实际上并没有定义“低内存条件”，所以我不知道是我做错了什么，还是我还没有达到那个条件。

这是我的 BroadcastReceiver 的代码:

public class MemoryBroadcastReceiver extends BroadcastReceiver {

    public void onReceive(Context context, Intent intent) {

        String action = intent.getAction();

        if (action.equals(Intent.ACTION_MEDIA_MOUNTED)) {
            Log.isExternalStorageProblem = false;
            Log.clearNotification(Log.externalMemoryNotificationID);
        }

        if (action.equals(Intent.ACTION_DEVICE_STORAGE_OK)) {
            Log.isInternalStorageLow = false;
            Log.clearNotification(Log.internalMemoryNotificationID);
        }

        if (action.equals(Intent.ACTION_DEVICE_STORAGE_LOW)) {
            Log.isInternalStorageLow = true;
            Log.displayMemoryNotification("Internal Storage Low",
                    "The internal storage is low, Please fix this.",
                    "Please clear cache and/or uninstall apps.", Log.internalMemoryNotificationID);
        }
    }
}

我有一个初始化接收器的服务，添加 Intent 过滤器并注册它(除其他外):

private MemoryBroadcastReceiver memoryBroadcastReciever = new MemoryBroadcastReceiver();

public void registerBroadcastReceiver() {
    IntentFilter filter = new IntentFilter();
    filter.addAction(Intent.ACTION_DEVICE_STORAGE_OK);
    filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
    filter.addAction(Intent.ACTION_DEVICE_STORAGE_LOW);
    filter.addDataScheme("file");
    
    this.getApplicationContext().registerReceiver(memoryBroadcastReciever, filter);
}

    @Override
    public void onCreate() {
        registerBroadcastReceiver();
}

最佳答案

长话短说

只要设备制造商不更改默认设置， Intent 就会在可用内存达到内部设备内存的 10% 时广播。

长版

为了这个目的，我翻遍了 Android 源代码，然后找到了一个名为 DeviceStorageMonitorService 的类

(位于:frameworks/base/services/java/com/android/server/DeviceStorageMonitorService.java)

来自javadoc:

This class implements a service to monitor the amount of disk
storage space on the device. If the free storage on device is less
than a tunable threshold value (a secure settings parameter; default 10%) a low memory notification is displayed to alert the user. If the user clicks on the low memory notification the Application Manager application gets launched to let the user free storage space.

就是这样。只要设备制造商不改变它，它就会是 10%。

进一步检查源代码，DeviceStorageMonitor 发出一个粘性广播:(第 354 行)

mContext.sendStickyBroadcast(mStorageLowIntent);

这意味着即使在广播结束后，您也可以通过注册接收者来捕获数据。

来自 Android Developer - Context :

Perform a sendBroadcast(Intent) that is "sticky," meaning the Intent you are sending stays around after the broadcast is complete, so that others can quickly retrieve that data through the return value of registerReceiver(BroadcastReceiver, IntentFilter). In all other ways, this behaves the same as sendBroadcast(Intent).

希望这对您有所帮助。

关于android - 何时广播 ACTION_DEVICE_STORAGE_LOW Intent ？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8117881/