具有活动继承的广播接收器

Question

我有个问题。我在每个活动中有2个我初始化广播接收器以获得互联网连接更改。收到更改后，我会通过在屏幕上显示一些文本来通知用户。

为了避免多次编写代码，我创建了继承自AppCompatActivity的BroadcastActivity。

现在，我用super((将视图传递给BroadcastActivity，并用视图进行操作(更改文本、可见性等(

问题是：这样做是最好的做法，还是有更优雅的解决方案？如果它会导致内存泄漏呢？

谢谢你的帮助！

BroadcastActivity 示例

open class BroadcastActivity : AppCompatActivity(), OnConnectionChangeListener {
//some code
}

活动示例(二级活动结构与此类似(

public class MainActivity extends BroadcastActivity{
//some code
}

p.S.在Kotlin上编写的BroadcastActivity和在Java上编写的MainActivity。

p.S.2此时此刻，我无法切换到单一活动并寻找临时解决方案。

Answer 1

为了进一步阐述我的评论；"更好"；(再一次，在我个人看来(。。。

活动Ktx.kt:

fun Activity.applyBroadcastReceiver(broadcastReceiver: BroadcastReceiver) {
lifecycle.addObserver(
BroadcastReceiverObserver(
BroadcastReceiverConfigurationImpl(broadcastReceiver, this)
)
)
}

BroadcastReceiverObserver.kt:

/**
* Class implementing [DefaultLifecycleObserver] which is in charge of delegating setting the
* [BroadcastReceiver]'s registration status.
* Registers in [Activity.onResume] and unregisters in [Activity.onPause]
*/
class BroadcastReceiverObserver(
val broadcastReceiverConfig: BroadcastReceiverConfiguration
) : DefaultLifecycleObserver {
var isBroadcastReceiverRegistered = false
override fun onResume(owner: LifecycleOwner) {
super.onResume(owner)
if (isBroadcastReceiverRegistered.not()) {
broadcastReceiverConfig.registerBroadcastReceiver()
isBroadcastReceiverRegistered = true
}
}
override fun onStop(owner: LifecycleOwner) {
if (isBroadcastReceiverRegistered) {
isBroadcastReceiverRegistered = false
broadcastReceiverConfig.unregisterBroadcastReceiver()
}
super.onStop(owner)
}
// add same things for onStart() and onPause()
}
/**
* Base class for handling a [BroadcastReceiver] registration status
*/
abstract class BroadcastReceiverConfiguration {
abstract fun registerBroadcastReceiver()
abstract fun unregisterBroadcastReceiver()
}
/**
* Base class for handling the broadcast receiver
*
* @see [BroadcastReceiverObserver]
*/
class BroadcastReceiverConfigurationImpl constructor(
private val broadcastReceiver: BroadcastReceiver,
private val hostActivity: Activity
) : BroadcastReceiverConfiguration() {

override fun registerBroadcastReceiver() {
//ConnectivityManager.CONNECTIVITY_ACTION - deprecated
hostActivity.registerReceiver(broadcastReceiver, IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION))
}
override fun unregisterBroadcastReceiver() {
hostActivity.unregisterReceiver(broadcastReceiver)
}
}

那么就这样使用它：

SomeActivity.kt:

class SomeActivity extends AppCompatActivity {

override fun onCreate() {
super.onCreate()
applyBroadcastReceiver(myBroadcastReceiver)
}

瞧。无需对Activity/AppCompatActivity/MyBaseActivity或其他任何子类化。