CODEWITHSUNDEEP
androidandroid-activitywebview
glutz
glutz

Reputation: 1959

How can i create a View owned by a global object in Android?

I have a webview that is owned by an Activity class. I access the webview via findViewId(). That works well. Now i'd like to have the webview persist globally. So I've extended the Application class. How can i access the webView from there though. Because the Application class doesnt allow findViewId() method. The WebView is defined in the activity_layout.xml so I suppose this is true of any View, not just webview, which is defined this way.

<WebView  
    android:id="@+id/webview"
    android:layout_width="fill_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:gravity="top"   />

The reason for this is that i need the webview to persist even when the activity is destroyed such that the webview doesnt refresh after OnDestroy of the Activity.

Thank you.

Upvotes: 0

Views: 103

Answers (2)

Code-Apprentice
Code-Apprentice

Reputation: 83557

The reason for this is that i need the webview to persist even when the activity is destroyed

This is a bad idea. Even if you are able to keep a reference to the WebView after the parent Activity is destroyed, it will be invalid because the WebView object that it references will be destroyed along with the Activity. This is a good example of why global data is frowned upon in Object Oriented languages like Java.

One possible solution is to cache the web page and all its resources (images etc) to the local file system. Then when your Activity restarts, you can check if there is a cache and load it directly from disk if it exists. This will give you a significant increase in response time.

Upvotes: 2

Kyle Emmanuel
Kyle Emmanuel

Reputation: 2221

Why don't you use inheritance?

You can create a base activity with the WebView as a property.

class BaseActivity Extends Activity{

  protected WebView webview;

  // and so on and so forth
}

Upvotes: 0

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