Android Open Source - 2do Main Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.spaghettidev.twodo;
/*from  www  . j a  v a2  s.  c o  m*/

import java.util.Stack;
import java.util.logging.Logger;

import android.content.ContentValues;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.Window;
import android.view.inputmethod.InputMethodManager;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.ViewFlipper;



public class MainActivity extends ActionBarActivity implements OnClickListener, OnFragmentInteractionListener {
  
  private ImageView DONE, TODO;
  private SQLiteDatabase db;
  private dbHelper database;
  private final static Logger log = Logger.getLogger(MainActivity.class.getName());
  
  private ViewFlipper vf;
  private HomeFragment hF;
  private TODOFragment tF;
  private DONEFragment dF;
  
  // Keeps track of your whereabouts through the backstack.
  private Stack<Character> fragStack;
  // 'H' = Home | 'T' = Todo | 'D' = Done
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);
    
    hF = new HomeFragment();
    tF = new TODOFragment();
    dF = new DONEFragment();
    
    vf = (ViewFlipper)findViewById(R.id.vf);
    
    TODO = (ImageView)findViewById(R.id.TODO);
    TODO.setOnClickListener(this);
    DONE = (ImageView)findViewById(R.id.DONE);
    DONE.setOnClickListener(this);
    
    fragStack = new Stack<Character>();
    
    // Upon initial creation, load the home fragment
    if (savedInstanceState == null) goHome();
    
    // Open Database
    database = new dbHelper(MainActivity.this);
    Log.d("DB", "Getting a writable database...");
    db = database.getWritableDatabase();
    Log.d("DB", "...writable database gotten!");
    
  }

  @Override
  public void onClick(View source) {

    if (source == TODO) {
      
      if (fragStack.peek() == 'T') {
        
        // Save the note
        String noteText = tF.getNoteText();
        if (!noteText.trim().equals("")) {
          Log.d("NOTE", "Adding note: " + noteText);
          database.addNote(db, noteText.trim());
        }
        
        goHome();
        
      }
      
      else {
        tF = new TODOFragment();
        goTodo();
        
      }
      
    }
    
    if (source == DONE) {
      
      if (fragStack.peek() == 'D') {

        ListView notes = dF.getListView();
        
        for (int i = 0; i < notes.getCount(); i++) {
          CheckBox c =  (CheckBox) ((ViewGroup) notes.getChildAt(i)).getChildAt(0);
          if (c.isChecked()) {
            ContentValues args = new ContentValues();
              args.put(dbHelper.colIsDone, 1);
              TextView t =  (TextView) ((ViewGroup) notes.getChildAt(i)).getChildAt(2);
              db.update(dbHelper.tblNotes, args, dbHelper.colID + "='" + t.getText() + "'", null);
          }
        }
        
        goHome();
      }
      
      else {

        dF = new DONEFragment();
        goDone();
        
      }
      
    }
    
  }
  
  @Override
  public void onBackPressed() {
    if (fragStack.isEmpty()){
      fragStack.add('H');
    }
    log.info("stack before: " + fragStack.toString());
    fragStack.pop();
    log.info("stack after: " + fragStack.toString());
    if (fragStack.isEmpty()) finish();
    else if (fragStack.size() == 1){
      goHome();
      return;
    }
    else if (fragStack.peek() == 'H'){
      goHome();
      return;
    }
    else if (fragStack.peek() == 'T'){
      fragStack.pop();
      goTodo();
      return;
    }
    else if (fragStack.peek() == 'D'){
      fragStack.pop();
      goDone();
      return;
    }
    
  }
  
  private void goHome(){
    
    hideKeyboard();
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.replace(R.id.f1, hF).commit();
    vf.setDisplayedChild(0);
    TODO.setImageResource(R.drawable.todo2);
    DONE.setImageResource(R.drawable.done2);
    fragStack.removeAllElements();
    fragStack.push('H');
    
  }
  private void goTodo(){
    
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.replace(R.id.f1, tF).commit();
    vf.setDisplayedChild(1);
    TODO.setImageResource(R.drawable.todo2);
    DONE.setImageResource(R.drawable.donegs);
    fragStack.push('T');
    
  }
  private void goDone(){
    
    hideKeyboard();
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.replace(R.id.f1, dF).commit();
    TODO.setImageResource(R.drawable.todogs);
    DONE.setImageResource(R.drawable.done2);
    vf.setDisplayedChild(2);
    fragStack.push('D');
    
  }
  
  private void hideKeyboard() {
      if(getCurrentFocus()!=null) {
          InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
          inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
      }
  }

  public void onFragmentInteraction(Uri uri) {}

  @Override
  public void onFragmentInteraction(Uri uri, View origin) {}

  @Override
  public void addTaskInList(String text, long listId) {}

  @Override
  public void closeFragment(Fragment fragment) {}
  
  @Override
  protected void onResume() {
    if (fragStack == null) {
      fragStack = new Stack<Character>();
    }
    if (fragStack.isEmpty()){
      fragStack.add('H');
    }
    super.onResume();
  }

}

Java Source Code List

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