You almost no information as to what goes wrong, but my guess is that since you didn't input any values, the call to Double.parseDouble() throws an exception. BTW, since you say you're a beginner, you might want to give the android-beginners mailing list a try.
On Mon, Apr 13, 2009 at 7:11 AM, yoyo <[email protected]> wrote: > > package com.androidyo.firstbmi; > > import java.text.DecimalFormat; > > import android.app.Activity; > import android.os.Bundle; > import android.view.View; > import android.view.View.OnClickListener; > import android.widget.Button; > import android.widget.EditText; > import android.widget.TextView; > > public class Bmi extends Activity { > > /** Called when the activity is first created. */ > �...@override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > > > Button button=(Button)findViewById(R.id.submit); > button.setOnClickListener(calcBMI); > } > private OnClickListener calcBMI = new OnClickListener() > { > public void onClick(View v) > { > DecimalFormat nf=new DecimalFormat("0.00"); > > EditText fieldheight=(EditText)findViewById(R.id.height); > EditText fieldweight = (EditText)findViewById(R.id.weight); > double height = > Double.parseDouble(fieldheight.getText().toString > ()); > height=height/100; > double weight = > Double.parseDouble(fieldweight.getText().toString > ()); > > TextView result = (TextView)findViewById(R.id.result); > TextView fieldsuggest = (TextView)findViewById(R.id.suggest); > if(height<=0||weight<=0) > result.setText("input wrong"); > else > { > double BMI = weight / (height * height); > > > result.setText("Your BMI is "+nf.format(BMI)); > > if(BMI>25){ > fieldsuggest.setText(R.string.advice_heavy); > }else if(BMI<20){ > fieldsuggest.setText(R.string.advice_light); > }else{ > fieldsuggest.setText(R.string.advice_average); > } > } > > } > > }; > } > > > > MY question: > > > > when runing the app .if i input nothing .it will force close > > how can i fix it??? > please give me a hang...i am a beginners.thanks > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
