用户离线时如何使用自定义的“无Internet连接可用”布局？

Question

我一直在尝试使用自定义图像，该图像将在用户脱机时显示给用户，并且当用户单击图像时，应该重新加载活动。

ps我正在使用Blogger API

Answer 1

首先添加此权限以清单

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

活动薄弱

private boolean isNetworkAvailable() {
    ConnectivityManager connectivityManager 
          = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}

像这样使用

if(isNetworkAvailable()){
//internt connect
}else{
// no network 
//you can show image here by adding layout and set visibility gone and when no connection set visible
}

Answer 2

您可以使用全屏的自定义对话框来检查互联网。 所以，你可以写

if(isNetworkAvailable()){
        //Your Logic for Internet Connection
 }else {
    val noInternetDialog = Dialog(this, android.R.style.Theme)
    noInternetDialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
    noInternetDialog.setContentView(R.layout.no_internet_layout)
    val window = noInternetDialog.window
    window.setLayout(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
    // What ever you have widget, can use them here.
    //for example
    val button_try_again = noInternetDialog.findViewById(R.id.buttonId)
    val image_to_display = noInternetDialog.findViewById(R.id.imageId)
    // listeners for image

    noInternetDialog.show
 }

isNetworkAvaibale（）是，

fun isNetworkAvailable(): Boolean {

        val connectivityManager = ApplicationInit.getAppContext()
                .getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
        val activeNetworkInfo = connectivityManager.activeNetworkInfo
        return activeNetworkInfo != null && activeNetworkInfo.isConnected
    } 

PS：不要忘了添加Internet权限