Android Open Source - BMI B M I Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * @Author:  Shiyao Qi//from w  ww. j  a  v a 2s  . c  o  m
 * @Date:  2011.11
 * @Function:  Calculate the body mass index and give some advice,
 *         also can share the result to friends.
 */
package com.twlkyao.bmi;

import java.text.DecimalFormat;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class BMIActivity extends Activity 
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        findViews();
        setListeners();
    };
    
  private Button button_cal;
  private Button button_share;
  private EditText fieldheight;
  private EditText fieldweight;
  private EditText fieldsex;
  private TextView result;
  private TextView suggest;
  
  private void findViews()
  {
    button_cal=(Button)findViewById(R.id.btn_cal);  
    button_share=(Button)findViewById(R.id.btn_share);
    fieldheight=(EditText)findViewById(R.id.height);
    fieldweight=(EditText)findViewById(R.id.weight);
    fieldsex=(EditText)findViewById(R.id.sex);
    result=(TextView)findViewById(R.id.result);
    suggest=(TextView)findViewById(R.id.suggest);
  }
  private void setListeners()
  {
    button_cal.setOnClickListener(calcBMI);
    button_share.setOnClickListener(shareResult);
    
  };
  
    @Override
  public boolean onCreateOptionsMenu(Menu menu)
    {
    // TODO Auto-generated method stub
      menu.add(0, 1, 1, R.string.about);
      menu.add(0, 2, 2, R.string.exit);
      return super.onCreateOptionsMenu(menu);
  };

    @Override
  public boolean onOptionsItemSelected(MenuItem item)  
  {
    // TODO Auto-generated method stub
    if(2==item.getItemId())  {
      finish();
    }
    else if(1==item.getItemId())  
      {
      openOptionsDialog();
    }
    return super.onOptionsItemSelected(item);
  };
  
  private Button.OnClickListener calcBMI=new Button.OnClickListener()
  {
    public void onClick(View v)
    {
      DecimalFormat df=new DecimalFormat("0.00");
      double height=Double.parseDouble(fieldheight.getText().toString())/100;
      double weight=Double.parseDouble(fieldweight.getText().toString());
      String sex=fieldsex.getText().toString();
      double BMI =weight/(height*height);
      
      result.setText(getString(R.string.result)+df.format(BMI));
      
      if(sex.equals("?"))
      {
        if(BMI>29)
        {
          suggest.setText(R.string.advice_fat_female);      
        }
        else if(BMI>24)
        {
          suggest.setText(R.string.advice_heavy_female);
        }
        else if(BMI>18)
        {
          suggest.setText(R.string.advice_ok_female);
        }
        else if(BMI<18)
        {
          suggest.setText(R.string.advice_light_female);
        }
      }

      else if(sex.equals("?"))
      {
        if(BMI>30)
        {
          suggest.setText(R.string.advice_fat_male);      
        }
        else if(BMI>25)
        {
          suggest.setText(R.string.advice_heavy_male);
        }
        else if(BMI>20)
        {
          suggest.setText(R.string.advice_ok_male);
        }
        else if(BMI<20)
        {
          suggest.setText(R.string.advice_light_male);
        }
      }
    }
  };
  
  private Button.OnClickListener shareResult=new Button.OnClickListener()
  {
    public void onClick(View v)
    {
      Intent intent=new Intent(Intent.ACTION_SEND);
      intent.setType("text/plain");
      intent.putExtra(Intent.EXTRA_SUBJECT,"BMI" );
      
      intent.putExtra(Intent.EXTRA_TEXT, getResources().getString(R.string.share_result)
          +result.getText()+getResources().getString(R.string.share_suggest)
            +suggest.getText()
              +getResources().getString(R.string.share_invite));  
      startActivity(Intent.createChooser(intent, 
          getResources().getString(R.string.share_title)));
    }
  };
  
  private void openOptionsDialog()
  {
    Toast.makeText(BMIActivity.this,R.string.about_msg,Toast.LENGTH_SHORT).show();    
  }
}

Java Source Code List

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