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How-to articles, tricks, and solutions about ANDROID

Get a JSON object from a HTTP response

To get a JSON object from a HTTP response in Java, you can use the JSONObject class from the org.json library.

json java android

Getting java.net.SocketTimeoutException: Connection timed out in android

The java.net.SocketTimeoutException: Connection timed out error usually occurs when a client is trying to connect to a server, but the connection request is taking too long to complete.

java android java-io httpurlconnection

GSON throwing "Expected BEGIN_OBJECT but was BEGIN_ARRAY"?

If GSON is throwing a JsonSyntaxException with the message "Expected BEGIN_OBJECT but was BEGIN_ARRAY", it means that you are trying to parse a JSON array as if it were a JSON object.

java android gson

How can I fix 'android.os.NetworkOnMainThreadException'?

The android.os.NetworkOnMainThreadException is a runtime exception that is thrown when an application attempts to perform a networking operation on the main thread.

java android android-networking networkonmainthread

How can I generate random number in specific range in Android?

To generate a random number in a specific range in Android, you can use the nextInt method of the java.util.Random class.

java random android kotlin

How set background drawable programmatically in Android

To set a background drawable programmatically in Android, you can use the setBackgroundDrawable method of the View class.

java background android drawable

how to add button click event in android studio

To add a button click event in Android Studio, follow these steps:

java button android android-studio view

How to call a method after a delay in Android

To call a method after a delay in Android, you can use the Handler class and the postDelayed() method. The postDelayed() method takes a Runnable and a delay in milliseconds as arguments, and it runs the Runnable after the specified delay.

java delay android handler

How to call a SOAP web service on Android

To call a SOAP web service on Android, you can use the HttpURLConnection class to send an HTTP request to the web service and receive the response.

java android wsdl soap web-services

How to check certificate name and alias in keystore files?

To check the certificate name and alias in a keystore file, you can use the keytool utility that comes with the Java Development Kit (JDK).

java android keystore