[英]How can I access MainActivity's objects or methods inside BroadcastReceiver?
[英]How can I hide and show views on a MainActivity from a BroadcastReceiver
所以我的BroadcastREceiver遇到錯誤...接收器正在運行並檢測網絡的變化..一旦添加可見性,它就會消失...
罐頭化的地方是警告消息中可見性的變化
val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
val networkInfo = connectivityManager.activeNetworkInfo
if (networkInfo != null && networkInfo.detailedState == NetworkInfo.DetailedState.CONNECTED) {
Log.d("Network Connected","NC is connected")
MainActivity().warning_message.visibility = View.INVISIBLE
MainActivity().isConnected = true
} else if (networkInfo != null) {
val state = networkInfo.detailedState
Log.d("NetworkReceiver", state.name)
} else {
MainActivity().warning_message.visibility = View.VISIBLE
MainActivity().isConnected = false
Log.d("Network Connected","NC")
}
}
警告消息只是:
<FrameLayout
android:id="@+id/warning_message"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:visibility="invisible"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/top_toolbar">
在主要活動布局中。
我收到的錯誤是:進程:com.example.user.appname,PID:19972
java.lang.RuntimeException:接收com.example.user.appname.ConnectionReceiver@531d646中的廣播意圖{act = android.net.conn.CONNECTIVITY_CHANGE flg = 0x4000010(has extras)}時出錯
沒有關於原因的特定錯誤消息。
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