Context context = view.getContext();

if (context instanceof Activity){

	Activity activity = (Activity)context;

}

//应用

public View.OnClickListener onClickListener = new View.OnClickListener() {

	public void onClick(View v) {

		Activity currentActivity = (Activity) v.getContext();

		Intent i = new Intent(currentActivity, ScreenTransitionLab.class);

		currentActivity.startActivity(i);

	}

};