bookmark/favorites

Question

I am trying to make an app which consists of only text. Every page(xml) is different. Now I want to make a bookmark page for the user to bookmark his/her favorites. I succeeded making a bookmark page which is activated with a button on the home-screen, I also have a bookmark button on every text page, but I can't figure out how I can send or reveal my bookmarked page/text on the bookmark page. this is what i got, which does not work:

package life.quotes;


/** Called when the activity is first created. */    
@Override    
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.page1);
    cb = (CheckBox)findViewById(R.id.favorites);
    b = (Button)findViewById(R.id.button_right);

    Button Page2 = (Button) findViewById(R.id.button_right);
    Page2.setOnClickListener(new View.OnClickListener() {
        public void onClick (View view) {
            Intent myIntent = new Intent(view.getContext(), Page2.class);
            startActivityForResult(myIntent, 0);
        }
    });

    cb.setOnClickListener(this);
}

private void savePrefs(String key, boolean value){
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
    Editor edit= sp.edit();
    edit.putBoolean(key, value);
    edit.commit();
}

private void savePrefs(String key, String value){ 
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
    Editor edit= sp.edit();
    edit.putString(key, value);
    edit.commit();
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    savePrefs("FAVORITES", cb.isChecked());
    savePrefs("QUOTE1", getString(R.string.quote1));
}
        `

Can anyone please help me?

Answer 1

Well if every page is text only as you say, You can get the text from textview and add them to an SQLite db.

Here's an example of what I mean, based on an app I did.
DatabaseConnector.java:

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;


public class DatabaseConnector {

    private static final String DB_NAME = "WorldCountries";
    private SQLiteDatabase database;
    private DatabaseOpenHelper dbOpenHelper;

    public DatabaseConnector(Context context) {
            dbOpenHelper = new DatabaseOpenHelper(context, DB_NAME, null, 1);
    }

    public void open() throws SQLException {
       database = dbOpenHelper.getWritableDatabase();
    } 

    public void close() {
      if (database != null)
         database.close();
    }      

    public void insertContact(String name, String cap)  {
      ContentValues newCon = new ContentValues();
      newCon.put("name", name);
      newCon.put("cap", cap);

      open();
      database.insert("country", null, newCon);
      close();
    }


    public void updateContact(long id, String name, String cap) {
      ContentValues editCon = new ContentValues();
      editCon.put("name", name);
      editCon.put("cap", cap);

      open();
      database.update("country", editCon, "_id=" + id, null);
      close();
    }


    public Cursor getAllContacts() {
       return database.query("country", new String[] {"_id", "name"}, null, null, null, null, "name");
    }

    public Cursor getOneContact(long id) {
       return database.query("country", null, "_id=" + id, null, null, null, null);
    }

    public void deleteContact(long id) {
       open(); 
       database.delete("country", "_id=" + id, null);
       close();
    }
}

DatabaseOpenHelper.java:

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class DatabaseOpenHelper extends SQLiteOpenHelper {

    public DatabaseOpenHelper(Context context, String name,
            CursorFactory factory, int version) {
        super(context, name, factory, version);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String createQuery = "CREATE TABLE country (_id integer primary key autoincrement,name, cap);";                 
        db.execSQL(createQuery);        
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }

}

Now this is the activity which contains the list of items added to favorites or bookmarks
FavoriteList.java:

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.AdapterView.OnItemClickListener;

public class FavoriteList extends ListActivity {

    public static final String ROW_ID = "row_id";
    private ListView conListView;
    private CursorAdapter conAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        conListView=getListView();
        conListView.setOnItemClickListener(viewConListener);

        // map each name to a TextView
    String[] from = new String[] { "name" };
    int[] to = new int[] { R.id.countryTextView };
    conAdapter = new SimpleCursorAdapter(FavoriteList.this, R.layout.country_list, null, from, to);
    setListAdapter(conAdapter); // set adapter
    }


    @Override
    protected void onResume() {
       super.onResume();  
       new GetContacts().execute((Object[]) null);
    } 


    @Override
    protected void onStop() {
       Cursor cursor = conAdapter.getCursor();

       if (cursor != null) 
          cursor.deactivate();

       conAdapter.changeCursor(null);
       super.onStop();
    }    


    private class GetContacts extends AsyncTask<Object, Object, Cursor> 
    {
       DatabaseConnector dbConnector = new DatabaseConnector(FavoriteList.this);

       @Override
       protected Cursor doInBackground(Object... params) {
          dbConnector.open();
          return dbConnector.getAllContacts(); 
       } 

       @Override
       protected void onPostExecute(Cursor result) {
            conAdapter.changeCursor(result); // set the adapter's Cursor
            dbConnector.close();
       } 
    } 

    OnItemClickListener viewConListener = new OnItemClickListener() {
       public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {         
          Intent viewCon = new Intent(FavoriteList.this, ViewFav.class);
          viewCon.putExtra(ROW_ID, arg3);
          startActivity(viewCon);
       }
    };   

}

And this is the activity for viewing each item in the favorites list, with a menu item to delete entry from database
ViewFav.java

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.database.Cursor;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.TextView;

public class ViewFav extends Activity {

   private long rowID;
   private TextView nameTv;
   private TextView capTv;

   @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.view_fav);

      setUpViews();
      Bundle extras = getIntent().getExtras();
      rowID = extras.getLong(FavoriteList.ROW_ID); 
   }

   private void setUpViews() {
       nameTv = (TextView) findViewById(R.id.nameText);
       capTv = (TextView) findViewById(R.id.capText);
   }

   @Override
   protected void onResume() {
      super.onResume();
      new LoadContacts().execute(rowID);
   } 

   private class LoadContacts extends AsyncTask<Long, Object, Cursor> {
      DatabaseConnector dbConnector = new DatabaseConnector(ViewFav.this);

      @Override
      protected Cursor doInBackground(Long... params) {
         dbConnector.open();
         return dbConnector.getOneContact(params[0]);
      } 

      @Override
      protected void onPostExecute(Cursor result) {
         super.onPostExecute(result);

         result.moveToFirst();
         int nameIndex = result.getColumnIndex("name");
         int capIndex = result.getColumnIndex("cap");

         nameTv.setText(result.getString(nameIndex));
         capTv.setText(result.getString(capIndex));

         result.close();
         dbConnector.close();
      }
   } 


   @Override
   public boolean onCreateOptionsMenu(Menu menu)  {
      super.onCreateOptionsMenu(menu);
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.view_fav_menu, menu);
      return true;
   }

   @Override
   public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
         case R.id.deleteItem:
            deleteContact();
            return true;

         default:
            return super.onOptionsItemSelected(item);
      } 
   }

   private void deleteContact() {
      AlertDialog.Builder alert = new AlertDialog.Builder(ViewFav.this);
      alert.setTitle(R.string.confirmTitle); 
      alert.setMessage(R.string.confirmMessage); 
      alert.setPositiveButton(R.string.delete_btn,
         new DialogInterface.OnClickListener()  {
            public void onClick(DialogInterface dialog, int button) {
               final DatabaseConnector dbConnector = 
                  new DatabaseConnector(ViewFav.this);

               AsyncTask<Long, Object, Object> deleteTask =
                  new AsyncTask<Long, Object, Object>()  {
                     @Override
                     protected Object doInBackground(Long... params) {
                        dbConnector.deleteContact(params[0]); 
                        return null;
                     } 

                     @Override
                     protected void onPostExecute(Object result) {
                        finish(); 
                     }
                  };

               deleteTask.execute(new Long[] { rowID });               
            }
         }
      );

      alert.setNegativeButton(R.string.cancel_btn, null).show();
   }
}

And finally putting a favorite button in your activity/fragment when clicking on the favorites button in gets the content in your textview and adds them as an entry in the database, in this case the database contains

    private long rowID; 
    private TextView nameEt;
    private TextView capEt;

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

         nameEt = (TextView) findViewById(R.id.textView1);
         capEt = (TextView) findViewById(R.id.textView2);

         //other stuff in OnCreate ......
    }

    private MenuItem itemfav;
    @Override
    public boolean  onCreateOptionsMenu(Menu menu) {
        itemfav = menu.add(0, 10, 10, "Favorite");
        itemfav.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
        return super.onCreateOptionsMenu(menu);
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
            case 10:
                fav();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }

    }

    private void fav() {
        AsyncTask<Object, Object, Object> saveContactTask = 
                   new AsyncTask<Object, Object, Object>() 
                   {
                      @Override
                      protected Object doInBackground(Object... params) 
                      {
                         saveContact();
                         return null;
                      }

                      @Override
                      protected void onPostExecute(Object result) 
                      {
                         Toast.makeText(Button2.this, "Item has been added to favorites", Toast.LENGTH_SHORT).show();
                      }
                   }; 

                saveContactTask.execute((Object[]) null); 
    }

    private void saveContact() 
       {
          DatabaseConnector dbConnector = new DatabaseConnector(this);
              dbConnector.insertContact(nameEt.getText().toString(),capEt.getText().toString());

       }