Android
SearchView

Appcompat SearchView mit dem RxBindings-Watcher

build.gradle :

dependencies {
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile 'com.jakewharton.rxbinding:rxbinding-appcompat-v7:0.4.0'
}

menu / menu.xml :

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item android:id="@+id/action_search" android:title="Search"
        android:icon="@android:drawable/ic_menu_search"
        app:actionViewClass="android.support.v7.widget.SearchView" 
        app:showAsAction="always"/>
</menu>

MainActivity.java :

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu, menu);

    MenuItem searchMenuItem = menu.findItem(R.id.action_search);
    setupSearchView(searchMenuItem );

    return true;
}

private void setupSearchView(MenuItem searchMenuItem) {
    SearchView searchView = (SearchView) searchMenuItem.getActionView();
    searchView.setQueryHint(getString(R.string.search_hint)); // your hint here

    SearchAdapter searchAdapter = new SearchAdapter(this);
    searchView.setSuggestionsAdapter(searchAdapter);

    // optional: set the letters count after which the search will begin to 1
    // the default is 2
    try {
        int autoCompleteTextViewID = getResources().getIdentifier("android:id/search_src_text", null, null);
        AutoCompleteTextView searchAutoCompleteTextView = (AutoCompleteTextView) searchView.findViewById(autoCompleteTextViewID);
        searchAutoCompleteTextView.setThreshold(1);
    } catch (Exception e) {
        Logs.e(TAG, "failed to set search view letters threshold");
    }

    searchView.setOnSearchClickListener(v -> {
        // optional actions to search view expand
    });
    searchView.setOnCloseListener(() -> {
        // optional actions to search view close
        return false;
    });

    RxSearchView.queryTextChanges(searchView)
            .doOnEach(notification -> {
                CharSequence query = (CharSequence) notification.getValue();
                searchAdapter.filter(query);
            })
            .debounce(300, TimeUnit.MILLISECONDS) // to skip intermediate letters
            .flatMap(query -> MyWebService.search(query)) // make a search request
            .retry(3)
            .subscribe(results -> {
                searchAdapter.populateAdapter(results);
            });

    //optional: collapse the searchView on close
    searchView.setOnQueryTextFocusChangeListener((view, queryTextFocused) -> {
        if (!queryTextFocused) {
            collapseSearchView();
        }
    });
}

SearchAdapter.java

public class SearchAdapter extends CursorAdapter {
    private List<SearchResult> items = Collections.emptyList();

    public SearchAdapter(Activity activity) {
        super(activity, null, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
    }

    public void populateAdapter(List<SearchResult> items) {
        this.items = items;
        final MatrixCursor c = new MatrixCursor(new String[]{BaseColumns._ID});
        for (int i = 0; i < items.size(); i++) {
            c.addRow(new Object[]{i});
        }
        changeCursor(c);
        notifyDataSetChanged();
    }

    public void filter(CharSequence query) {
        final MatrixCursor c = new MatrixCursor(new String[]{BaseColumns._ID});
        for (int i = 0; i < items.size(); i++) {
            SearchResult result = items.get(i);
            if (result.getText().startsWith(query.toString())) {
                c.addRow(new Object[]{i});
            }
        }
        changeCursor(c);
        notifyDataSetChanged();
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        ViewHolder holder = (ViewHolder) view.getTag();
        int position = cursor.getPosition();
        if (position < items.size()) {
            SearchResult result = items.get(position);
            // bind your view here
        }
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View v = inflater.inflate(R.layout.search_list_item, parent, false);
        ViewHolder holder = new ViewHolder(v);

        v.setTag(holder);
        return v;
    }

    private static class ViewHolder {
        public final TextView text;

        public ViewHolder(View v) {
            this.text= (TextView) v.findViewById(R.id.text);
        }
    }
}

Suchansicht in der Symbolleiste mit Fragment

menu.xml - ( res -> menu )

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".HomeActivity">

    <item
        android:id="@+id/action_search"
        android:icon="@android:drawable/ic_menu_search"
        android:title="Search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="always" />

</menu>

MainFragment.java

public class MainFragment extends Fragment {

    private SearchView searchView = null;
    private SearchView.OnQueryTextListener queryTextListener;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_main, container, false);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.menu, menu);
        MenuItem searchItem = menu.findItem(R.id.action_search);
        SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE);

        if (searchItem != null) {
            searchView = (SearchView) searchItem.getActionView();
        }
        if (searchView != null) {
            searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName()));

            queryTextListener = new SearchView.OnQueryTextListener() {
                @Override
                public boolean onQueryTextChange(String newText) {
                    Log.i("onQueryTextChange", newText);

                    return true;
                }
                @Override
                public boolean onQueryTextSubmit(String query) {
                    Log.i("onQueryTextSubmit", query);

                    return true;
                }
            };
            searchView.setOnQueryTextListener(queryTextListener);
        }
        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_search:
                // Not implemented here
                return false;
            default:
                break;
        }
        searchView.setOnQueryTextListener(queryTextListener);
        return super.onOptionsItemSelected(item);
    }
}

Referenz-Screenshot:

Theme für SearchView einstellen

Um ein Theme für SearchView anzuwenden, das als app:actionViewClass aus der menu.xml menu.xml extrahiert wurde, müssen wir menu.xml , dass es vollständig von dem Stil abhängt, der auf die zugrunde liegende Toolbar angewendet wird. Um die Symbolleiste zu gestalten, führen Sie die folgenden Schritte aus.

Erstellen Sie einen Stil in der styles.xml

<style name="ActionBarThemeOverlay">
     <item name="android:textColorPrimary">@color/prim_color</item>
     <item name="colorControlNormal">@color/normal_color</item>
     <item name="colorControlHighlight">@color/high_color</item>
     <item name="android:textColorHint">@color/hint_color</item>
</style>

Wenden Sie den Stil auf die Symbolleiste an.

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        app:theme="@style/ActionBarThemeOverlay"
        app:popupTheme="@style/ActionBarThemeOverlay"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/colorPrimary"
        android:title="@string/title"
        tools:targetApi="m" />

Dadurch erhalten alle Ansichten, die der Symbolleiste entsprechen, die gewünschte Farbe (Zurück-Schaltfläche, Menüsymbole und SearchView).