pass string from fragment main activity to fragments activity in viewpager

android, android-fragments, fragment, string

Solution

You don't have access directly to your fragments that reside in `ViewPager` so you can't reference them directly.

What I am doing in these cases is send a broadcast message from Activity to Fragments. For this reason register a `BroadcatReceiver` in the fragment (either in `onCreate` or `onCreateView` - your decision)m, set a custom action for that receiver (ex. `"my_package.actions.internal.BROADCAST_ACTION"`), don't forget to unregister the receiver from complementary method.

When you want to send a message from activity, create an intent with above mentioned action, add the string in intent extra and send the broadcast.

In your receiver's `onReceive` method (within the fragment), get the String from intent paramter and there you have the string.

Makes sense?

EDIT: To provide some code, below are the changes that I would make for fragment:

public class Store_Swipe extends Fragment {

    public static final String ACTION_INTENT = "my_package.action.UI_UPDATE";

    protected BroadcastReceiver receiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            if(ACTION_INTENT.equals(intent.getAction())) {
                String value = intent.getStringExtra("UI_KEY");
                updateUIOnReceiverValue(value);
            }
        }
    };

    private void updateUIOnReceiverValue(String value) {
        // you probably want this:
        kata_keyword.setText(value);
    }

    String KeyWord;
    private TextView kata_keyword;

    public static Fragment newInstance(Context context) {
        Store_Swipe f = new Store_Swipe();
        return f;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        IntentFilter filter = new IntentFilter(ACTION_INTENT);
        LocalBroadcastManager.getInstance(getActivity()).registerReceiver(receiver, filter);
    }

    @Override
    public void onDestroy() {
        LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(receiver);
        super.onDestroy();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        Bundle bundle = this.getArguments();
        KeyWord = bundle.getString("keyword");
        View view = inflater.inflate(R.layout.store_swipe, container, false);
        init(view);

        return view;

    }

    void init(View view) {
        kata_keyword = (TextView) view.findViewById(R.id.keyword);
        ImageView image = (ImageView) view.findViewById(R.id.image_error);
        kata_keyword.setText(KeyWord);
    }
}

And this code I would have from activity, the parameter is the value from EditText:

protected void sendValueToFragments(String value) {
    // it has to be the same name as in the fragment
    Intent intent = new Intent("my_package.action.UI_UPDATE");
    intent.putExtra("UI_KEY", value);
    LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}

You would call this from the click listener that you would set in `onCreate`:

findViewById(R.id.button_id).setOnClickListener(new OnClickListener() {            
    @Override
    public void onClick(View v) {
        String valueThatYouWantToSend = null; /// just the value
        sendValueToFragments(valueThatYouWantToSend);       
    }
});

Problem

Original source

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• Send data from activity to fragment in Android