Example usage for android.view Window setCallback

Introduction

In this page you can find the example usage for android.view Window setCallback.

Prototype

public void setCallback(Callback callback) 

Source Link

Document

Set the Callback interface for this window, used to intercept key events and other dynamic operations in the window.

Usage

From source file:android.support.v7.app.ActionBarActivityDelegateICS.java

@Override
public void onCreate(Bundle savedInstanceState) {
    // Set framework uiOptions from the support metadata value
    if (UIOPTION_SPLIT_ACTION_BAR_WHEN_NARROW.equals(getUiOptionsFromMetadata())) {
        mActivity.getWindow().setUiOptions(ActivityInfo.UIOPTION_SPLIT_ACTION_BAR_WHEN_NARROW,
                ActivityInfo.UIOPTION_SPLIT_ACTION_BAR_WHEN_NARROW);
    }//from w  w  w .j  av a2 s  .c  om

    super.onCreate(savedInstanceState);

    if (mHasActionBar) {
        // If action bar is requested by inheriting from the appcompat theme,
        // the system will not know about that. So explicitly request for an action bar.
        mActivity.requestWindowFeature(WindowCompat.FEATURE_ACTION_BAR);
    }
    if (mOverlayActionBar) {
        mActivity.requestWindowFeature(WindowCompat.FEATURE_ACTION_BAR_OVERLAY);
    }

    /*
     * This goofy move needs some explanation.
     *
     * The verifier on older platform versions has some interesting side effects if
     * a class defines a method that takes a parameter of a type that doesn't exist.
     * In this case, that type is android.view.ActionMode. Therefore, ActionBarActivity
     * cannot override the onActionModeStarted/Finished methods without causing nastiness
     * when it is loaded on older platform versions.
     *
     * Since these methods are actually part of the window callback and not intrinsic to
     * Activity itself, we can install a little shim with the window instead that knows
     * about the ActionMode class. Note that this means that any new methods added to
     * Window.Callback in the future won't get proxied without updating the support lib,
     * but we shouldn't be adding new methods to public interfaces that way anyway...right? ;)
     */
    final Window w = mActivity.getWindow();
    w.setCallback(createWindowCallbackWrapper(w.getCallback()));
}

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