Android Open Source - MiniExpense Main Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.duplavid.miniexpense;
//  w ww.j  a va  2  s .c om
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.DatePickerDialog;
import android.app.Dialog;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
 
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TabHost;
import android.widget.TabHost.TabContentFactory;
import android.widget.TextView;
 
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MainActivity extends FragmentActivity implements TabHost.OnTabChangeListener {
  
  private Context context;
  public static Context statContext;
  private Menu menu;
  
  ViewPager ViewPager;
  TabsAdapter TabsAdapter;
  
  private TabHost mTabHost;
  private HashMap mapTabInfo = new HashMap();
  private TabInfo mLastTab = null;
  
  private static String date;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
 
        int currentapiVersion = android.os.Build.VERSION.SDK_INT;
        if (currentapiVersion >= android.os.Build.VERSION_CODES.HONEYCOMB){
          ViewPager = new ViewPager(this);
            ViewPager.setId(R.id.pager);
            setContentView(ViewPager);
            
          final ActionBar bar = getActionBar();
            bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
            bar.setTitle(R.string.title_activity_main);
            
            //Attach the Tabs to the fragment classes and set the tab title.
            TabsAdapter = new TabsAdapter(this, ViewPager);
            TabsAdapter.addTab(bar.newTab().setText("View expenses"),
                ExpenseView.class, null);
            TabsAdapter.addTab(bar.newTab().setText("Add expense"),
                    ExpenseAdd.class, null);
            
            if (savedInstanceState != null) {
                bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
            }
            
        }else{
          setContentView(R.layout.tabs_layout);
            // Step 2: Setup TabHost
            initialiseTabHost(savedInstanceState);
            if (savedInstanceState != null) {
                mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); //set the tab as per the saved state
            } 
            
        }
        
        context = getApplicationContext();
        statContext = context;
    }
    
    private static void addTab(MainActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) {
        // Attach a Tab view factory to the spec
    tabSpec.setContent(activity.new TabFactory(activity));
        String tag = tabSpec.getTag();
     
        // Check to see if we already have a fragment for this tab, probably
        // from a previously saved state.  If so, deactivate it, because our
        // initial state is that a tab isn't shown.
        tabInfo.fragment = activity.getSupportFragmentManager().findFragmentByTag(tag);
        if (tabInfo.fragment != null && !tabInfo.fragment.isDetached()) {
            android.support.v4.app.FragmentTransaction ft = activity.getSupportFragmentManager().beginTransaction();
            ft.detach(tabInfo.fragment);
            ft.commit();
            activity.getSupportFragmentManager().executePendingTransactions();
        }
     
        tabHost.addTab(tabSpec);
    }
    
    private class TabInfo {
        private String tag;
        private Class clss;
        private Bundle args;
        private Fragment fragment;
        TabInfo(String tag, Class clazz, Bundle args) {
            this.tag = tag;
            this.clss = clazz;
            this.args = args;
        }

   }
    
    class TabFactory implements TabContentFactory {
       
        private final Context mContext;
 
        /**
         * @param context
         */
        public TabFactory(Context context) {
            mContext = context;
        }
 
        /** (non-Javadoc)
         * @see android.widget.TabHost.TabContentFactory#createTabContent(java.lang.String)
         */
        public View createTabContent(String tag) {
            View v = new View(mContext);
            v.setMinimumWidth(0);
            v.setMinimumHeight(0);
            return v;
        }
 
    }
    
    @SuppressWarnings("unchecked")
  private void initialiseTabHost(Bundle args) {
        mTabHost = (TabHost)findViewById(android.R.id.tabhost);
        mTabHost.setup();
        TabInfo tabInfo = null;
        MainActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("View expenses"), ( tabInfo = new TabInfo("Tab1", ExpenseView.class, args)));
        this.mapTabInfo.put(tabInfo.tag, tabInfo);
        MainActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Add expense"), ( tabInfo = new TabInfo("Tab2", ExpenseAdd.class, args)));
        this.mapTabInfo.put(tabInfo.tag, tabInfo);

        // Default to first tab
        this.onTabChanged("Tab1");
        //
        mTabHost.setOnTabChangedListener(this);
    }
    
    public void onTabChanged(String tag) {
        TabInfo newTab = (TabInfo) this.mapTabInfo.get(tag);
        if (mLastTab != newTab) {
            android.support.v4.app.FragmentTransaction ft = this.getSupportFragmentManager().beginTransaction();
            if (mLastTab != null) {
                if (mLastTab.fragment != null) {
                    ft.detach(mLastTab.fragment);
                }
            }
            if (newTab != null) {
                if (newTab.fragment == null) {
                    newTab.fragment = Fragment.instantiate(this,
                            newTab.clss.getName(), newTab.args);
                    ft.add(R.id.realtabcontent, newTab.fragment, newTab.tag);
                } else {
                    ft.attach(newTab.fragment);
                }
            }
     
            mLastTab = newTab;
            ft.commit();
            this.getSupportFragmentManager().executePendingTransactions();
        }
    }
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);
        
        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
        String currency = settings.getString("currency", "euro");
        if(currency.equals("euro")){
          MenuItem item = menu.findItem(R.id.euro);
            item.setIcon(R.drawable.euroblue);
        }else{
          MenuItem item = menu.findItem(R.id.dollar);
            item.setIcon(R.drawable.dollarblue);
        }
        this.menu = menu;
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
            case R.id.euro:
              MenuMethods.euroBlue(context, menu);
                return true;
            case R.id.dollar:
              MenuMethods.dollarBlue(context, menu);
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
    
    public static class DatePickerFragment extends DialogFragment
      implements DatePickerDialog.OnDateSetListener {

      public TextView setDate;
      
      public DatePickerFragment() {}
      
      @SuppressLint("ValidFragment")
    public DatePickerFragment(TextView edit_text) {
        setDate = edit_text;
      }
      
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
      // Use the current date as the default date in the picker
      final Calendar c = Calendar.getInstance();
      int year = c.get(Calendar.YEAR);
      int month = c.get(Calendar.MONTH);
      int day = c.get(Calendar.DAY_OF_MONTH);
      
      // Create a new instance of DatePickerDialog and return it
      return new DatePickerDialog(getActivity(), this, year, month, day);
    }
    
    public void onDateSet(DatePicker view, int year, int month, int day) {
      // Do something with the date chosen by the user
      //play with the month value
      String mnth = ("0"+(month+1));
      if(mnth.length() > 2){
        mnth = mnth.substring(1,3);
      }
      
      //play with the day value
      String dy = ("0"+day);
      if(dy.length() > 2){
        dy = dy.substring(1,3);
      }
      date = ""+year+"-"+mnth+"-"+dy+"";

      setDate.setText(date);
    }
  }
    
    public void showDatePickerDialog(View v) {
      TextView setDate = (TextView)findViewById(R.id.setDate); 
        DialogFragment newFragment = new DatePickerFragment(setDate);
        newFragment.show(getSupportFragmentManager(), "datePicker");
    }

  public void saveContents(View view){
    Spinner mInout = (Spinner) findViewById(R.id.spinner1);
    EditText mAmount = (EditText) findViewById(R.id.editText1);
    EditText mAdditional = (EditText) findViewById(R.id.editText2);
    TextView mDate = (TextView)findViewById(R.id.setDate);
    
    String am = mAmount.getText().toString();
    String additional = mAdditional.getText().toString();
    String setDate = mDate.getText().toString();

    //Validate form
    if(am.equals("")){
      mAmount.setError("Please enter an amount.");
    }else if(additional.equals("")){
      mAdditional.setError("Please enter additional information about the payment.");
    }else if(setDate.equals("Payment date wasn't selected")){
      mDate.setError("Please set the payment date.");
    }else{
      DatabaseHandler db = new DatabaseHandler(this);
      
      //Play around with the in/out value
      String io = mInout.getSelectedItem().toString();
      int inout;
      if(io.equals("Pay out")){inout = 0;}else{inout = 1;}
      
      //Parse the amount string to double
      Double amount = Double.parseDouble(am);
      
      db.addExpense(new Expense(inout, setDate, amount, additional));
      
        int currentapiVersion = android.os.Build.VERSION.SDK_INT;
          if (currentapiVersion >= android.os.Build.VERSION_CODES.HONEYCOMB){
            ExpenseView ex = (ExpenseView)
                      getSupportFragmentManager().findFragmentByTag(
                              "android:switcher:" + TabsAdapter.mViewPager.getId() + ":0");
            ex.refresh();
          }
      
        //Show a dialog that payment was saved
      AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
      alertDialog.setTitle("Saved");
      alertDialog.setMessage("Payment is saved");
      
      alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int which) {
            EditText mAmount = (EditText)findViewById(R.id.editText1);
            mAmount.setText("");
            EditText mAdditional = (EditText)findViewById(R.id.editText2);
            mAdditional.setText("");
            TextView mDate = (TextView)findViewById(R.id.setDate);
            mDate.setText("Payment date wasn't selected");
            mDate.setError(null);
          }
        });
      
      alertDialog.show();
    }
    
  }
  
  public static Context getContext(){
    return statContext;
  }
  
 
  private String now() {
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    return sdf.format(cal.getTime());
  }

   public static class TabsAdapter extends FragmentPagerAdapter
   implements ActionBar.TabListener, ViewPager.OnPageChangeListener {

    private final Context mContext;
    private final ActionBar mActionBar;
    private final ViewPager mViewPager;
    private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
    
    static final class TabInfo {
      private final Class<?> clss;
      private final Bundle args;
      
      TabInfo(Class<?> _class, Bundle _args) {
        clss = _class;
        args = _args;
      }
    }
  
    public TabsAdapter(FragmentActivity activity, ViewPager pager) {
      super(activity.getSupportFragmentManager());
      mContext = activity;
      mActionBar = activity.getActionBar();
      mViewPager = pager;
      mViewPager.setAdapter(this);
      mViewPager.setOnPageChangeListener(this);
    }
    
    public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
      TabInfo info = new TabInfo(clss, args);
      tab.setTag(info);
      tab.setTabListener(this);
      mTabs.add(info);
      mActionBar.addTab(tab);
      notifyDataSetChanged();
    }
    
    @Override
    public void onPageScrollStateChanged(int state) {
      // TODO Auto-generated method stub
    }
    
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
      // TODO Auto-generated method stub
    }
  
    @Override
    public void onPageSelected(int position) {
      // TODO Auto-generated method stub
      mActionBar.setSelectedNavigationItem(position);
    }
    
    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
      // TODO Auto-generated method stub
    }
    
    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
      Object tag = tab.getTag();
      for (int i=0; i<mTabs.size(); i++) {
        if (mTabs.get(i) == tag) {
          mViewPager.setCurrentItem(i);
        }
      }
    }
    
    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
      // TODO Auto-generated method stub
    }
    
    @Override
    public Fragment getItem(int position) {
      TabInfo info = mTabs.get(position);
      return Fragment.instantiate(mContext, info.clss.getName(), info.args);
    }
    
    @Override
    public int getCount() {
      return mTabs.size();
    }
  
  }
 
}

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