error in adding Suggestions to search view

[ambitamber]

This is my code. List<String> newWords = new ArrayList<>(); newWords.add("one"); newWords.add("two"); searchView.addSuggestions(newWords);

This is error that I am getting. java.lang.NullPointerException: Attempt to invoke virtual method 'void br.com.mauker.materialsearchview.MaterialSearchView.addSuggestions(java.util.List)' on a null object reference

[Mauker1]

Did you place the MSV XML in your layout? Also, did you correctly get the reference using findViewById?

Can you share your layout and more of your code?

[ambitamber]

here is xml

    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    tools:context=".MainActivity">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="0dp"
        android:layout_height="?attr/actionBarSize"
        android:background="#607D8B"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <Button
        android:id="@+id/bt_clearHistory"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="clear History"
        app:layout_constraintTop_toBottomOf="@id/toolbar"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <Button
        android:id="@+id/bt_clearSuggestions"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="clear Suggestions"
        app:layout_constraintTop_toBottomOf="@id/bt_clearHistory"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <Button
        android:id="@+id/bt_clearAll"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="clear All"
        app:layout_constraintTop_toBottomOf="@id/bt_clearSuggestions"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <br.com.mauker.materialsearchview.MaterialSearchView
        android:id="@+id/searchView"
        style="@style/MaterialSearchViewStyle"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:elevation="10dp"
        app:voiceIconEnabled="true" />

</androidx.constraintlayout.widget.ConstraintLayout>

Here is Java file.

public class SearchActivty extends AppCompatActivity {

    @BindView(R.id.toolbar) Toolbar search_toolbar;
    @BindView(R.id.searchView) MaterialSearchView searchView;

    FireStoreLoader fireStoreLoader;
    String mQuery = null;
    GridLayoutManager gridLayoutManager;
    RecyclerViewAdapter recyclerViewAdapter;

    boolean dataAvailable = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search);

        ButterKnife.bind(this);

        setSupportActionBar(search_toolbar);
        getSupportActionBar().setTitle(null);
        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                searchView.openSearch();
                fireStoreLoader = new FireStoreLoader(SearchActivty.this);
                fireStoreLoader.getWordsList();
            }
        }, 300);
        searchViewText();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.search_menu,menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        if (item.getItemId() == R.id.action_search){
            searchView.openSearch();
        }
        return true;
    }

    private void searchViewText(){
        searchView.setOnQueryTextListener(new MaterialSearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                mQuery = query;
                Log.i("SearchActivty",mQuery);
                return true;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                return false;
            }
        });
    }

    @Override
    public void onBackPressed() {
        if (searchView.isOpen()){
            searchView.closeSearch();
        }else{
            super.onBackPressed();
        }
    }

  public void addSuggestions(List<String> words){
        List<String> newWords = new ArrayList<>();
        newWords.add("one");
        newWords.add("two");
        searchView.addSuggestions(newWords);
}

[Mauker1]

When exactly are you calling public void addSuggestions(List<String> words)?

Also, I see you're using Butter Knife. Can you add a breakpoint after the ButterKnife.bind(this); and confirm if the searchView is not null?

[ambitamber]

Hello,

I am trying to add suggestions from

[ambitamber]

Here I call

handler.postDelayed(new Runnable() { @Override public void run() { searchView.openSearch(); fireStoreLoader = new FireStoreLoader(SearchActivty.this); fireStoreLoader.getWordsList(); } }, 300); searchViewText();

This is FireStoreLoader class. Here I use Firebase Firestore to fetch data.

`public void getWordsList(){ database = FirebaseFirestore.getInstance(); searchActivty = new SearchActivty(); String countryName = context.getResources().getConfiguration().locale.getCountry(); DocumentReference docRef = database.collection("Google Trend Data").document("india"); docRef.get().addOnSuccessListener(new OnSuccessListener() { @Override public void onSuccess(DocumentSnapshot documentSnapshot) { Object objectData = documentSnapshot.getData(); String jsonData = new Gson().toJson(objectData); try { JSONObject jsonObject = new JSONObject(jsonData); wordsList = new ArrayList<>(); for (int i = 0; i < jsonObject.length(); i++){ JSONObject eachItem = jsonObject.getJSONObject(String.valueOf(i)); String eachWord = eachItem.getString("word"); wordsList.add(eachWord); } } catch (JSONException e) { e.printStackTrace(); }

            searchActivty.addSuggestions(wordsList);
        }
    });

}`

[ambitamber]

I checked that search view is not null.

[Mauker1]

Use your debugger again and check if MSV is null inside the public void addSuggestions(List<String> words) method.

[ambitamber]

That was the problem. Thanks for the help.

[Mauker1]

You're welcome!