Assignment OverviewWe have learned several Android/Java tools for Mobile App Development such as...

Question

Assignment OverviewWe have learned several Android/Java tools for Mobile App Development such as Android View Objects (Buttons, EditText, SeekBar, TextView, ImageView), XML Layouts and Attributes, Android Sensors (Accelerometer, GPS), Handler / Runnable Sequence and Custom View classes for Animation Canvas Operations. Students need to develop an Android Application. You may choose from the following two options: 1. Choose one of the available Applications from the Text Book. In order to make the application run, you are required to go through the code and "fix" any errors the application might have. So please code carefully and be ready to 'debug' and fix errors as they occur. Once the application is running with no errors you then required to add five to six features of your choice as described in the rubric. 2. The second option is to create a Note Pad app as guided below:App Requirements 1. Your app will be a simple note pad that allows users to enter text notes. 2. The last updated date/time to be displayed on the app. 3. When the user presses the back arrow, home button, etc. The text and the time will automatically be saved. 4. The text and the time must be saved to the device’s internal file system. You have the choice to use either XML or Externalization of resources ranging from simple values such as strings and colors to more complex resources like images, animations, and themes. 5. Note text (and the saved time) should be automatically loaded when the app goes into the Resume state. 6. In case of the entered text is longer than the displayed area then a scroll bar will be displayed 7. Landscape and portrait orientations must be used for the presented contents as shown below. 8. The below is an example of how the app should look. Note, you do NOT need to make yours look exactly like this, but the content here is limited to try to keep variation minimal.Submission Requirements: Submissions must consist of your zipped project folder. Submissions not following these requirements will be penalized.  Complete code for your project. You can use any publicly available libraries / code / artwork / materials as long as you correctly acknowledge all sources. Please remember that when you include new features from the Android API or examples of code from other sources or projects - you must cite these examples in comments (author, website or book where you got the ideas from).  Documentation of your programming effort and your design process. This should be a separate document, giving an overview of the different steps you went through and presenting all documentation materials you produced on the way.  Submissions should reflect the concepts and practices we cover in class.You are reminded to read the “Plagiarism” section of the course description. Your research should be a synthesis of ideas from a variety of sources expressed in your own words. All reports must use the Harvard referencing style. Marking rubrics are attached.Assessment Criteria:Score Unsatisfactory (3-4) Satisfactory (5-6) Good (7-8) Very Good (9-10)Use of Control - Model - View Application Design/10 marksOnly the Activity Class is defined. No modelling of objects or data in program is present. Data passed from sensors directly to view without use of variables or modelling.Only the Activity Class is defined. Modelling of data in program is present with fields and functions.Activity and one additional class is defined. Model is evident between the two classes. One class is an extension of View for animation.Multiple classes present to create a well-defined and flexible model for the application. Accessor and Modifier functions exist to pass data through the Application. Objects in App such as characters in game or agents in program are modelled as a separate class.Android Sensors and Events (Accelerometer Sensor, Touch Sensor, …)/10 marksNo Sensors used in application.Attempted to use Sensor in Application. However, the sensor does not work as designed or does not add functionality to the App.Sensors are used during application well coded Listener functions or classes. Data from Sensors is modelled and used to control functionality of App.Sensors are used during application and data from sensors is passed between classes using model with variables and functions. Sensors provide key functionality for the App.Handlers and Runnables/10 marksNo use of Handlers and Runnables present in App.Handler and Runnable sequence present. However, the sequence does not work as designed or does not add functionality to the App.Handler and Runnable sequence is present. Sequence works to control animation or timed events. Function or functions work to start and stop sequence as needed for function of the App.Handler and Runnable sequence present to provide key functionality to Application. Multiple use of Handler and runnable present or Handler and Runnable controls the animation and graphics of application. Score Unsatisfactory (5-7) Satisfactory (8-10) Good (11-12) Very Good (13-15)XML and User Interface Design/15 marksErrors present in XML Layout. Minimal or no use of XML layout tools such as tables and table rows. No use of custom view objects in XML.XML runs as designed. However, the XML does not deviate from basic layout. Less than 3 XML objects present.XML fills out features for the App, providing a wide selection of buttons, seekbars, imageViews, and custom View Object.XML fills out features for the App, providing a wide selection of buttons, seekbars, imageViews, and custom View Object. Colors and design of XML interface are visually pleasing and add creativity and functionality to the App.Relevance and Creativity/10 marksApp has little relevance beyond fulfilling the requirements of the rubric.App has relevance to real world use but shows little or no visual creativity beyond the function of the program.App has relevance and employs some creative touches in visual, sound, or sensor design. App is fully featured and presents a possible prototype for a consumer or commercial application. Visual and functional elements of the App combine for a compelling user experience

Meenakshi · Accepted Answer

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notepadanswer/app/src/main/java/notepad/activities/addtofolders/Adapter.java
notepadanswer/app/src/main/java/notepad/activities/addtofolders/Adapter.java
package notepad.activities.addtofolders;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import notepad.R;
import notepad.activities.editfolders.NewFolderViewHolder;
import notepad.database.FolderNoteDAO;
import notepad.database.FoldersDAO;
import notepad.database.NotesDAO;
import notepad.events.FolderCreatedEvent;
import notepad.events.FolderDeletedEvent;
import notepad.models.Folder;
import notepad.models.Note;
import java.util.ArrayList;
import java.util.List;
import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
/**
 
 */
class Adapter extends RecyclerView.Adapter{
    private static final int VIEW_TYPE_NEW_FOLDER = 0;
    private static final int VIEW_TYPE_SELECT_A_FOLDER = 1;
    private List folders;
    private List checkedFolders;
    private int noteId;
    private Note note;
    public Adapter(int noteId){
        this.noteId = noteId;
        note = NotesDAO.getNote(noteId);
    }
    @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
        if (viewType == VIEW_TYPE_NEW_FOLDER){
            return new NewFolderViewHolder(
                    LayoutInflater.from(parent.getContext()).inflate(R.layout.view_new_folder, parent, false));
        }else if (viewType == VIEW_TYPE_SELECT_A_FOLDER){
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.view_select_folder, parent, false);
            return new SelectFolderViewHolder(view, this);
        }
        return null;
    }
    @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position){
        if (holder instanceof SelectFolderViewHolder){
            position--;
            SelectFolderViewHolder selectFolderViewHolder = (SelectFolderViewHolder) holder;
            Folder thisFolder = folders.get(position);
            selectFolderViewHolder.setData(thisFolder, note);
            selectFolderViewHolder.itemView.setTag(thisFolder);
            selectFolderViewHolder.setChecked(checkedFolders.contains(thisFolder));
        }
    }
    @Override public int getItemViewType(int position){
        if (position == 0) return VIEW_TYPE_NEW_FOLDER;
        else return VIEW_TYPE_SELECT_A_FOLDER;
    }
    @Override public int getItemCount(){
        return 1 + (folders == null ? 0 : folders.size());
    }
    public void loadFromDatabase(){
        folders = FoldersDAO.getLatestFolders();
        checkedFolders = FolderNoteDAO.getFolders(noteId);
        notifyDataSetChanged();
    }
    void registerEventBus(){
        EventBus.getDefault().register(this);
    }
    void unregisterEventBus(){
        EventBus.getDefault().unregister(this);
    }
    @Subscribe public void onFolderDeletedEvent(FolderDeletedEvent folderDeletedEvent){
        int index = folders.indexOf(folderDeletedEvent.getFolder());
        if (index == -1) return;
        folders.remove(index);
        notifyItemRemoved(index + 1);
    }
    @Subscribe public void onFolderCreatedEvent(FolderCreatedEvent folderCreatedEvent){
        if (folders == null) folders = new ArrayList();
        folders.add(0, folderCreatedEvent.getFolder());
        notifyItemInserted(1);
    }
    public List getCheckedFolders(){
        return checkedFolders;
    }
}
notepadanswer/app/src/main/java/notepad/activities/addtofolders/AddToFoldersActivity.java
notepadanswer/app/src/main/java/notepad/activities/addtofolders/AddToFoldersActivity.java
package notepad.activities.addtofolders;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import butterknife.BindView;
import butterknife.ButterKnife;
import notepad.R;
import notepad.events.NoteFoldersUpdatedEvent;
import org.greenrobot.eventbus.EventBus;
import se.emilsjolander.intentbuilder.Extra;
import se.emilsjolander.intentbuilder.IntentBuilder;
/**
 *
 */
@IntentBuilder
public class AddToFoldersActivity extends AppCompatActivity{
    private static final String TAG = "AddToFoldersActivity";
    @BindView(R.id.toolbar) Toolbar mToolbar;
    @BindView(R.id.recycler_view) RecyclerView mRecyclerView;
    Adapter adapter;
    @Extra Integer noteId;
    @Override protected void onCreate(@Nullable Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list_of_folders);
        AddToFoldersActivityIntentBuilder.inject(getIntent(), this);
        ButterKnife.bind(this);
        setSupportActionBar(mToolbar);
        mToolbar.setTitle("Add to folders");
        mToolbar.setNavigationIcon(R.drawable.ic_close_white_24dp);
        mToolbar.setNavigationOnClickListener(new View.OnClickListener(){
            @Override public void onClick(View v){
                onBackPressed();
            }
        });
        LinearLayoutManager llm = new LinearLayoutManager(this);
        llm.setOrientation(LinearLayoutManager.VERTICAL);
        mRecyclerView.setLayoutManager(llm);
        adapter = new Adapter(noteId);
        mRecyclerView.setAdapter(adapter);
        adapter.loadFromDatabase();
    }
    @Override protected void onStart(){
        super.onStart();
        adapter.registerEventBus();
    }
    @Override protected void onStop(){
        super.onStop();
        adapter.unregisterEventBus();
        EventBus.getDefault().post(new NoteFoldersUpdatedEvent(noteId));
    }
}
notepadanswer/app/src/main/java/notepad/activities/addtofolders/SelectFolderViewHolder.java
notepadanswer/app/src/main/java/notepad/activities/addtofolders/SelectFolderViewHolder.java
package notepad.activities.addtofolders;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import butterknife.BindView;
import butterknife.ButterKnife;
import notepad.R;
import notepad.database.FolderNoteDAO;
import notepad.models.Folder;
import notepad.models.Note;
/**
 * 
 */
class SelectFolderViewHolder extends RecyclerView.ViewHolder{
    private static final String TAG = "SelectFolderViewHolder";
    private final Adapter adapter;
    @BindView(R.id.checkbox) CheckBox checkBox;
    @BindView(R.id.folder_name_text) TextView folderName;
    private Folder folder;
    private Note note;
    public SelectFolderViewHolder(final View itemView, final Adapter adapter){
        super(itemView);
        ButterKnife.bind(this, itemView);
        this.adapter = adapter;
        itemView.setOnClickListener(new View.OnClickListener(){
            @Override public void onClick(View v){
                setChecked(!checkBox.isChecked());
            }
        });
        checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
            @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked){
                if (isChecked){
                    adapter.getCheckedFolders().add(folder);
                    FolderNoteDAO.createFolderNoteRelation(folder, note);
                }else{
                    adapter.getCheckedFolders().remove(folder);
                    FolderNoteDAO.removeFolderNoteRelation(folder, note);
                }
                Log.e(TAG, "onClick: checkedFolders:" + adapter.getCheckedFolders());
            }
        });
    }
    public void setData(Folder folder, Note note){
        this.folder = folder;
        this.note = note;
        folderName.setText(folder.getName());
    }
    public void setChecked(boolean checked){
        checkBox.setChecked(checked);
    }
}
notepadanswer/app/src/main/java/notepad/activities/DebugActivity.java
notepadanswer/app/src/main/java/notepad/activities/DebugActivity.java
package notepad.activities;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import butterknife.ButterKnife;
import butterknife.OnClick;
import notepad.R;
import notepad.database.AppDatabase;
/**
 * 
 */
public class DebugActivity extends AppCompatActivity{
    @Override protected void onCreate(@Nullable Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_debug);
        ButterKnife.bind(this);
    }
    @OnClick(R.id.assign_to_folders) void assignToFolders(){
//      Note note = SQLite.select().from(Note.class).orderBy(Note_Table.createdAt, false).querySingle();
//      List folders = FoldersDAO.getLatestFolders();
//      for (Folder folder : folders){
//          FolderNoteRelation fnr = new FolderNoteRelation();
//          fnr.associateFolder(folder);
//          fnr.associateNote(note);
//          fnr.save();
//      }
        //TODO assign all notes to first folder.
    }
    @OnClick(R.id.create_5_notes) void create5Notes(){
        AppDatabase.Utils.createSomeNotes(5);
    }
}
notepadanswer/app/src/main/java/notepad/activities/editfolders/Adapter.java
notepadanswer/app/src/main/java/notepad/activities/editfolders/Adapter.java
package notepad.activities.editfolders;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import ir.cafebazaar.notepad.R;
import notepad.database.FoldersDAO;
import notepad.events.FolderCreatedEvent;
import notepad.events.FolderDeletedEvent;
import notepad.models.Folder;
import java.util.ArrayList;
import java.util.List;
import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
/**
 * Created by MohMah on 8/19/2016.
 */
class Adapter extends RecyclerView.Adapter{
    private static final int VIEW_TYPE_NEW_FOLDER = 0;
    private static final int VIEW_TYPE_EDIT_A_FOLDER = 1;
    List folders;
    OpenCloseable lastOpenedItem;
    @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
        if (viewType == VIEW_TYPE_NEW_FOLDER){
            return new NewFolderViewHolder(
                    LayoutInflater.from(parent.getContext()).inflate(R.layout.view_new_folder, parent, false), this);
        }else if (viewType == VIEW_TYPE_EDIT_A_FOLDER){
            return new EditFolderViewHolder(
                    LayoutInflater.from(parent.getContext()).inflate(R.layout.view_edit_folder, parent, false), this);
        }
        return null;
    }
    @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position){
        if (holder instanceof EditFolderViewHolder){
            position--;
            EditFolderViewHolder editFolderViewHolder = (EditFolderViewHolder) holder;
            editFolderViewHolder.setFolder(folders.get(position));
        }
    }
    @Override public int getItemViewType(int position){
        if (position == 0) return VIEW_TYPE_NEW_FOLDER;
        else return VIEW_TYPE_EDIT_A_FOLDER;
    }
    @Override public int getItemCount(){
        return 1 + (folders == null ? 0 : folders.size());
    }
    public void loadFromDatabase(){
        folders = FoldersDAO.getLatestFolders();
        notifyDataSetChanged();
    }
    void registerEventBus(){
        EventBus.getDefault().register(this);
    }
    void unregisterEventBus(){
        EventBus.getDefault().unregister(this);
    }
    @Subscribe public void onFolderDeletedEvent(FolderDeletedEvent folderDeletedEvent){
        int index = folders.indexOf(folderDeletedEvent.getFolder());
        if (index == -1) return;
        folders.remove(index);
        notifyItemRemoved(index + 1);
    }
    @Subscribe public void onFolderCreatedEvent(FolderCreatedEvent folderCreatedEvent){
        if (folders == null) folders = new ArrayList();
        folders.add(0, folderCreatedEvent.getFolder());
        notifyItemInserted(1);
    }
    OpenCloseable getLastOpened(){
        return lastOpenedItem;
    }
    void setLastOpened(OpenCloseable lastOpenedItem){
        this.lastOpenedItem = lastOpenedItem;
    }
}
notepadanswer/app/src/main/java/notepad/activities/editfolders/EditFoldersActivity.java
notepadanswer/app/src/main/java/notepad/activities/editfolders/EditFoldersActivity.java
package notepad.activities.editfolders;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import butterknife.BindView;
import butterknife.ButterKnife;
import notepad.R;
import se.emilsjolander.intentbuilder.IntentBuilder;
/**
 *
 */
@IntentBuilder
public class EditFoldersActivity extends AppCompatActivity{
    private static final String TAG = "EditFoldersActivity";
    @BindView(R.id.toolbar) Toolbar mToolbar;
    @BindView(R.id.recycler_view) RecyclerView mRecyclerView;
    Adapter adapter;
    @Override protected void onCreate(@Nullable Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list_of_folders);
        EditFoldersActivityIntentBuilder.inject(getIntent(), this);
        ButterKnife.bind(this);
        setSupportActionBar(mToolbar);
        mToolbar.setNavigationIcon(R.drawable.ic_close_white_24dp);
        mToolbar.setNavigationOnClickListener(new View.OnClickListener(){
            @Override public void onClick(View v){
                onBackPressed();
            }
        });
        LinearLayoutManager llm = new LinearLayoutManager(this);
        llm.setOrientation(LinearLayoutManager.VERTICAL);
        mRecyclerView.setLayoutManager(llm);
        adapter = new Adapter();
        mRecyclerView.setAdapter(adapter);
        adapter.loadFromDatabase();
    }
    @Override protected void onStart(){
        super.onStart();
        adapter.registerEventBus();
    }
    @Override protected void onStop(){
        super.onStop();
        adapter.unregisterEventBus();
    }
}
notepadanswer/app/src/main/java/notepad/activities/editfolders/EditFolderViewHolder.java
notepadanswer/app/src/main/java/notepad/activities/editfolders/EditFolderViewHolder.java
package notepad.activities.editfolders;
import android.content.DialogInterface;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.AppCompatImageButton;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.TextView;
import org.greenrobot.eventbus.EventBus;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
import notepad.R;
import notepad.database.FoldersDAO;
import notepad.events.FolderDeletedEvent;
import notepad.models.Folder;
import notepad.utils.Utils;
/**
 *
 */
class EditFolderViewHolder extends RecyclerView.ViewHolder implements OpenCloseable{
    private final Adapter adapter;
    Folder folder;
    @BindView(R.id.left_button) AppCompatImageButton leftButton;
    @BindView(R.id.folder_name_text) TextView folderName;
    @BindView(R.id.right_button) AppCompatImageButton rightButton;
    @BindView(R.id.folder_name_til) TextInputLayout folderNameTIL;
    public EditFolderViewHolder(final View itemView, Adapter adapter){
        super(itemView);
        ButterKnife.bind(this, itemView);
        this.adapter = adapter;
        folderName.setOnFocusChangeListener(new View.OnFocusChangeListener(){
            @Override public void onFocusChange(View v, boolean hasFocus){
                if (hasFocus){
                    open();
                }
            }
        });
        folderName.setOnEditorActionListener(new TextView.OnEditorActionListener(){
            @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event){
                if (actionId == EditorInfo.IME_ACTION_DONE){
                    apply();
                    close();
                    return true;
                }
                return false;
            }
        });
    }
    @OnClick(R.id.left_button) void clickLeftButton(View view){
        if (isOpen()){
            close();
            delete();
        }
    }
    @OnClick(R.id.right_button) void clickRightButton(View view){
        if (isOpen()){
            apply();
            close();
        }else{
            open();
        }
    }
    @Override public void open(){
        leftButton.setImageResource(R.drawable.ic_delete_white_24dp);
        rightButton.setImageResource(R.drawable.ic_done_white_24dp);
        itemView.setBackgroundResource(R.color.md_white_1000);
        if (adapter.getLastOpened() != null)
            adapter.getLastOpened().close();
        adapter.setLastOpened(this);
    }
    @Override public boolean isOpen(){
        return folderName.hasFocus();
    }
    @Override public void close(){
        Utils.hideSoftKeyboard(itemView);
        leftButton.setImageResource(R.drawable.ic_folder_black_24dp);
        folderName.setText(folder.getName());
        folderName.clearFocus();
        rightButton.setImageResource(R.drawable.ic_mode_edit_white_24dp);
        itemView.setBackgroundResource(0);
        if (adapter.getLastOpened() == this) adapter.setLastOpened(null);
    }
    private void apply(){
        if (TextUtils.isEmpty(folderName.getText())){
            folderNameTIL.setError("Enter a folder name");
            return;
        }
        folder.setName(folderName.getText().toString());
        FoldersDAO.save(folder);
    }
    private void delete(){
        new AlertDialog.Builder(itemView.getContext(), R.style.DialogTheme)
                .setCancelable(true)
                .setTitle("Delete folder?")
                .setMessage("Folder '" + folder.getName() + "' will be deleted")
                .setPositiveButton("Delete Folder", new DialogInterface.OnClickListener(){
                    @Override public void onClick(DialogInterface dialog, int which){
                        dialog.dismiss();
                        FoldersDAO.delete(folder);
                        EventBus.getDefault().post(new FolderDeletedEvent(folder));
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener(){
                    @Override public void onClick(DialogInterface dialog, int which){
                        dialog.dismiss();
                    }
                })
                .show();
    }
    public void setFolder(Folder folder){
        this.folder = folder;
        folderName.setText(folder.getName());
        close();
    }
}
notepadanswer/app/src/main/java/notepad/activities/editfolders/NewFolderViewHolder.java
notepadanswer/app/src/main/java/notepad/activities/editfolders/NewFolderViewHolder.java
package notepad.activities.editfolders;
import android.support.v7.widget.AppCompatImageButton;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.TextView;
import org.greenrobot.eventbus.EventBus;
import java.util.Date;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
import notepad.R;
import notepad.database.FoldersDAO;
import notepad.events.FolderCreatedEvent;
import notepad.models.Folder;
import notepad.utils.Utils;
/**
 * 
 */
public class NewFolderViewHolder extends RecyclerView.ViewHolder implements OpenCloseable{
    private final Adapter adapter;
    @BindView(R.id.left_button) AppCompatImageButton leftButton;
    @BindView(R.id.folder_name_text) TextView folderName;
    @BindView(R.id.done_button) AppCompatImageButton doneButton;
    public NewFolderViewHolder(final View itemView, Adapter adapter){
        super(itemView);
        ButterKnife.bind(this, itemView);
        this.adapter = adapter;
        folderName.setOnFocusChangeListener(new View.OnFocusChangeListener(){
            @Override public void onFocusChange(View v, boolean hasFocus){
                if (hasFocus){
                    open();
                }
            }
        });
        folderName.setOnEditorActionListener(new TextView.OnEditorActionListener(){
            @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event){
                if (actionId == EditorInfo.IME_ACTION_DONE){
                    add();
                    close();
                    return true;
                }
                return false;
            }
        });
    }
    public NewFolderViewHolder(final View itemView){
        this(itemView, null);
    }
    @OnClick(R.id.left_button) void clickLeftButton(View view){
        if (isOpen()){
            close();
        }else{
            folderName.requestFocus();
            Utils.showSoftKeyboard(folderName);
            open();
        }
    }
    @OnClick(R.id.done_button) void clickDoneButton(View view){
        add();
        close();
    }
    @Override public void open(){
        doneButton.setVisibility(View.VISIBLE);
        leftButton.setImageResource(R.drawable.ic_close_white_24dp);
        leftButton.setAlpha(0.5f);
        itemView.setBackgroundResource(R.color.md_white_1000);
        if (adapter != null){
            if (adapter.getLastOpened() != null)
                adapter.getLastOpened().close();
            adapter.setLastOpened(this);
        }
    }
    @Override public boolean isOpen(){
        return folderName.hasFocus();
    }
    @Override public void close(){
        Utils.hideSoftKeyboard(itemView);
        doneButton.setVisibility(View.GONE);
        folderName.setText(null);
        folderName.clearFocus();
        leftButton.setAlpha(1f);
        leftButton.setImageResource(R.drawable.ic_add_white_24dp);
        itemView.setBackgroundResource(0);
        if (adapter!=null && adapter.getLastOpened() == this) adapter.setLastOpened(null);
    }
    private void add(){
        if (TextUtils.isEmpty(folderName.getText())) return;
        Folder folder = new Folder();
        folder.setCreatedAt(new Date());
        folder.setName(folderName.getText().toString().trim());
        FoldersDAO.save(folder);
        EventBus.getDefault().post(new FolderCreatedEvent(folder));
    }
}
notepadanswer/app/src/main/java/notepad/activities/editfolders/OpenCloseable.java
notepadanswer/app/src/main/java/notepad/activities/editfolders/OpenCloseable.java
package notepad.activities.editfolders;
/**
 */
interface OpenCloseable{
    void close();
    void open();
    boolean isOpen();
}
notepadanswer/app/src/main/java/notepad/activities/home/Adapter.java
notepadanswer/app/src/main/java/notepad/activities/home/Adapter.java
package notepad.activities.home;
import android.content.Intent;
import android.support.design.widget.Snackbar;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import notepad.activities.note.NoteActivityIntentBuilder;
import notepad.database.NotesDAO;
import notepad.events.NoteDeletedEvent;
import notepad.events.NoteEditedEvent;
import notepad.models.Folder;
import notepad.models.Note;
import notepad.utils.SimpleViewHolder;
import notepad.views.NoteCardView;
import java.util.List;
import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
/**
 */
class Adapter extends RecyclerView.Adapter{
    private static final String TAG = "Adapter";
    private final Folder folder;
    List notes;
    View.OnClickListener noteOnClickListener = new View.OnClickListener(){
        @Override public void onClick(View v){
            if (v instanceof NoteCardView){
                NoteCardView noteCardView = (NoteCardView) v;
                Intent intent = new NoteActivityIntentBuilder().noteId(noteCardView.getNote().getId()).build(v.getContext());
                v.getContext().startActivity(intent);
            }
        }
    };
    private View zeroNotesView;
    public Adapter(View zeroNotesView,

Assignment Overview We have learned several Android/Java tools for Mobile App Development such as Android View Objects (Buttons, EditText, SeekBar, TextView, ImageView), XML Layouts and Attributes,...

Answer To: Assignment Overview We have learned several Android/Java tools for Mobile App Development such as...

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