Question 125512 in Android Studio Question posted in
The official documentation can be found here.

Android Studio – is possible to keep an object across all the activities/fragment?

i would like to have a "global" object that persist in the application, even when you start other activity or fragment, its kind of annoying to use a bundle to pass the same elements in the app. Maybe with viewmodels? i dont know too much about that , so it would be handy if you give me an example or some guidance in this subject. Thank you in advance:)

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I ended using something similar to an static var, but there is no static var in kotlin, so i used companion objects, it can store a variable perfectly :)

    class ApplicationData {
   companion object {
      var string:String? =null
   }
 }

    and its called from any activity or fragment as follows: ApplicationData.string = "Hi, im a string"


  2. 0

    Basically it’s pretty simple.

    Step 1: Create a java class which extends the Application.

    import android.app.Application;

public class MyApplication extends Application {

    public String yourObj;

    public String getYourObj() {
        return yourObj;
    }

    public void setYourObj(String yourObj) {
        this.yourObj = yourObj;
    }
}

    Step 2: Define the Application name as your class.

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.someProject">

    <application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round">
        ...
    </application>

</manifest>

    Here add android:name=".MyApplication" inside <application/> tag.

    Step 3: Now use this where you want inside your application.

    ((MyApplication) getApplication()).setYourObj("...");
((MyApplication) getApplication()).getYourObj();

    That’s it 🙂

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search