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I am new to Android. Can you tell me what is a Bundle and how they are used in android?
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Android Bundles are generally used for passing data from one activity to another. Basically here concept of key-value pair is used where the data that one wants to pass is the value of the map, which can be later retrieved by using the key.
An Android App Bundle is a publishing format that includes all your app's compiled code and resources, and defers APK generation and signing to Google Play.
App bundles are publishing format, whereas APK (Android application Package) is the packaging format which eventually will be installed on device. Google uses app bundle to generate and serve optimized APKs for each user's device configuration, so they download only the code and resources they need to run your app.
The Bundle class is highly optimized for marshalling and unmarshalling using parcels. In some cases, you may need a mechanism to send composite or complex objects across activities. In such cases, the custom class should implement Parcelable, and provide the appropriate writeToParcel(android.
Bundle generally use for passing data between various Activities. It depends on you what type of values you want to pass but bundle can hold all types of values and pass to the new activity.
You can use it like ...
Intent intent = new
Intent(getApplicationContext(),SecondActivity.class);
intent.putExtra("myKey",AnyValue);
startActivity(intent);
Now you can get the passed values by...
Bundle extras = intent.getExtras();
String tmp = extras.getString("myKey");
you can also find more info on android-using-bundle-for-sharing-variables and Passing-Bundles-Around-Activities
Copy from Here.
91
Read this:
http://developer.android.com/reference/android/os/Bundle.html
It can be used to pass data between different Activity's
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