ActionModeDemo.java

/***
  Copyright (c) 2008-2012 CommonsWare, LLC
  
  Licensed under the Apache License, Version 2.0 (the "License"); you may
  not use this file except in compliance with the License. You may obtain
  a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
 */

package com.commonsware.android.actionmodemc;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.SparseBooleanArray;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Locale;

public class ActionModeDemo extends AppCompatActivity implements AdapterView.OnItemClickListener {
  private static final String[] items= { "lorem", "ipsum", "dolor",
      "sit", "amet", "consectetuer", "adipiscing", "elit", "morbi",
      "vel", "ligula", "vitae", "arcu", "aliquet", "mollis", "etiam",
      "vel", "erat", "placerat", "ante", "porttitor", "sodales",
      "pellentesque", "augue", "purus" };
  private ArrayList<String> words=null;
  private ArrayAdapter<String> adapter=null;

 @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    setContentView(R.layout.list_content_simple);
    initAdapter();

    getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
    getListView().setMultiChoiceModeListener(new HCMultiChoiceModeListener(
        this, getListView()));
    getListView().setOnItemClickListener(this);
  }

  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    getListView().setItemChecked(position, true);
  }

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

    return(super.onCreateOptionsMenu(menu));
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch(item.getItemId()) {
      case R.id.add:
        addWord();

        return(true);

      case R.id.reset:
        initAdapter();

        return(true);

      case R.id.about:
        Toast.makeText(this, R.string.about_toast, Toast.LENGTH_LONG)
            .show();

        return(true);
    }

    return(super.onOptionsItemSelected(item));
  }

  public boolean performActions(MenuItem item) {
    SparseBooleanArray checked=getListView().getCheckedItemPositions();

    switch (item.getItemId()) {
      case R.id.cap:
        for (int i=0; i < checked.size(); i++) {
          if (checked.valueAt(i)) {
            int position=checked.keyAt(i);
            String word=words.get(position);

            word=word.toUpperCase(Locale.ENGLISH);

            adapter.remove(words.get(position));
            adapter.insert(word, position);
          }
        }

        return(true);

      case R.id.remove:
        ArrayList<Integer> positions=new ArrayList<Integer>();

        for (int i=0; i < checked.size(); i++) {
          if (checked.valueAt(i)) {
            positions.add(checked.keyAt(i));
          }
        }

        Collections.sort(positions, Collections.reverseOrder());

        for (int position : positions) {
          adapter.remove(words.get(position));
        }

        getListView().clearChoices();

        return(true);
    }

    return(false);
  }

  private void initAdapter() {
    words=new ArrayList<String>();

    for (int i=0;i<5;i++) {
      words.add(items[i]);
    }

    adapter=
        new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_activated_1,
            words);

    setListAdapter(adapter);
  }

  private void addWord() {
    if (adapter.getCount()<items.length) {
      adapter.add(items[adapter.getCount()]);
    }
  }

  private ListView getListView() {
    return((ListView)findViewById(android.R.id.list));
  }

  private void setListAdapter(ListAdapter la) {
    getListView().setAdapter(la);
  }
}