hi All - total noob[java] here; i have an app on the android written, but i believe the question here is totally java related. after my app adds field1 + field2 + field3 and displays the value in field4, how do i *start over*? thing is, if ea field is empty, it displays an alert box saying that field is empty. if all 3 fields are empty, then all 3 alerts show up. however if AFTER i hit calculate [which adds 3 non-blank fields] i then clear out [make blank] field1, 2, or 3, or all - it does NOT reach the IF stmts that should be displaying the alerts saying "hey a field is blank" or whatever. see my code below, and THANK YOU for any help you can provide. seems so basic but something in my thinking is not right obviously:

package com.example;

import java.text.DecimalFormat;
import org.apache.commons.lang.StringUtils;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.Color;

import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Button;
import android.widget.Toast;
import android.view.View;

public class AdditionActivity extends Activity
{//Activity BEGIN
	
private EditText amount1;
private EditText amount2;
private EditText amount3;
private TextView tt;
private Button calculate;
String strAmount1 = new String("");

private double val1_height=0;
private double val2_width=0;
private double val3_segments=0;
private double val4_radius=0; //test
private double val5_theta1;
private double val6_theta2;
private double val7_sum;
@SuppressWarnings("unused")
private String result1;
private int fixFlag1 = 0;

boolean flag = true;
/** Called when the activity is first created. */
@Override

public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initControls();
}
private void initControls()
{
	
amount1=(EditText)findViewById(R.id.amount1);
amount2=(EditText)findViewById(R.id.amount2);
amount3=(EditText)findViewById(R.id.amount3);

tt=(TextView)findViewById(R.id.tt);
calculate=(Button)findViewById(R.id.calculate);
calculate.setOnClickListener(new Button.OnClickListener()
{public void onClick
(View v) { calculate();}});
}

public void calculate()//was private
{//calculate BEGIN

	try {//#1.3
val1_height=Double.parseDouble(amount1.getText().toString());
val2_width=Double.parseDouble(amount2.getText().toString());
val3_segments=Double.parseDouble(amount3.getText().toString());
	}//try END
	catch(Exception e) {     // ... handle errors ... 
		//throw new RuntimeException(e);
}

		if(val3_segments == 0)
		{//val3 BEGIN
			fixFlag1 = 1;
			// prepare the alert box 
			AlertDialog.Builder alertbox = new AlertDialog.Builder(this); 
			// set the message to display 
			alertbox.setMessage("# Segments must be > 0, please reenter."); 
			// add a neutral button to the alert box and assign a click listener 
			alertbox.setNeutralButton("Ok", new DialogInterface.OnClickListener() { 
			// click listener on the alert box 
			public void onClick(DialogInterface arg0, int arg1) { 
			// the button was clicked 
			} 
			}); 
			// show it 
			alertbox.show();
		}//val3 END

		else {//else BEGIN
		fixFlag1 = 0;
		}//else END
		
if(val2_width == 0)
		{//val2 BEGIN
		fixFlag1 = 1;
			// prepare the alert box 
			AlertDialog.Builder alertbox = new AlertDialog.Builder(this); 
			// set the message to display 
			alertbox.setMessage("Width must be > 0, please reenter."); 
			// add a neutral button to the alert box and assign a click listener 
			alertbox.setNeutralButton("Ok", new DialogInterface.OnClickListener() { 
			// click listener on the alert box 
			public void onClick(DialogInterface arg0, int arg1) { 
				// the button was clicked 
			} 
			}); 
			// show it 
			alertbox.show();
		}//val2 END
		else {//else BEGIN
		fixFlag1 = 0;
		}//else END

if(val1_height == 0)
//if(amount1.getText().toString().equals(""))
{//val1 BEGIN
		fixFlag1 = 1;
		// prepare the aler	t box 
		AlertDialog.Builder alertbox = new AlertDialog.Builder(this); 
		// set the message to display 
		alertbox.setMessage("Height must be > 0, please reenter."); 
		// add a neutral button to the alert box and assign a click listener 
		alertbox.setNeutralButton("Ok", new DialogInterface.OnClickListener() { 
		// click listener on the alert box 
		public void onClick(DialogInterface arg0, int arg1) { 
		// the button was clicked 
		} 
		}); 
		// show it 
		alertbox.show();
}//val1 END
else {//else BEGIN
fixFlag1 = 0;
}//else END

//simplified to be simply val1+val2+val3:
val7_sum = val1_height + val2_width + val3_segments;

if(fixFlag1==0){//fixFlag1 BEGIN
tt.setText(Double.toString(val7_sum));
}//fixFlag1 END
else {//else BEGIN
tt.setText("    {LENGTH}"); }//else END

}//calculate END
}//Activity END

Edited 5 Years Ago by Ezzaral: Fixed code tag

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