Android使用片段代替库的活动

Question

I am using this library MaterialSearchView in my app for implementing Gmail like search view. The library has provided the implementation details using an Activity. I tried the code inside a fragment, making the necessary changes.

To implement it we do something like this from an activity:

MaterialSearchView searchView = (MaterialSearchView) findViewById(R.id.search_view);

But, I am using a fragment instead so what I do is:

searchView = (MaterialSearchView) getActivity().findViewById(R.id.search_view);

Everything works fine except the VoiceSearch. The library implements voice search using the following code:

private void onVoiceClicked() {
    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speak an item name or number");    // user hint
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_WEB_SEARCH);    // setting recognition model, optimized for short phrases – search queries
    intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 1);    // quantity of results we want to receive
    if (mContext instanceof Activity) {
        ((Activity) mContext).startActivityForResult(intent, REQUEST_VOICE);
    }

How can I make this work? mContext in the above code is set inside the constructor as:

public MaterialSearchView(Context context) {
    this(context, null);
}

How can I make it work from a fragment? Code for the library

Answer 1

mContext might not be an Activity .

Try using this logic (copied from MediaRouteButton.getActivity() ) to get the Activity .

Activity getActivity() {
    Context context = getContext();
    while (context instanceof ContextWrapper) {
        if (context instanceof Activity) {
            return (Activity)context;
        }
        context = ((ContextWrapper)context).getBaseContext();
    }
    return null;
}