Android app - Multiply and divide the user entered values values in the two forms
Solution 1
For taking inputs take 3 EditText and take one Button for get Result by Clicking on it.
Follow this
public class result extends Activity
{
private EditText edit1;
private EditText edit2;
private EditText edit3;
public void onCreate(Bundle savedInstanceState)
{
try
{
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
edit1 = (EditText)findViewById(R.id.edit1);
edit2 = (EditText)findViewById(R.id.edit2);
edit3 = (EditText)findViewById(R.id.edit3);
Button click = (Button)findViewById(R.id.btn);
click.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
int a = Integer.parseInt(edit1.getText().toString());
int b = Integer.parseInt(edit2.getText().toString());
int c = Integer.parseInt(edit3.getText().toString());
double result = ((double) a/b)*c;
Toast.makeText(result.this, Double.toString(result),Toast.LENGTH_LONG).show();
}
});
}catch (Exception e) {
e.printStackTrace();
}
}
}
Result.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#fff"
>
<EditText
android:id="@+id/edit1"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:inputType="text"/>
<EditText
android:id="@+id/edit2"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:inputType="text"/>
<EditText
android:id="@+id/edit3"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:inputType="text"/>
<Button
android:id="@+id/btn"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:text="Click"/>
</LinearLayout>
Solution 2
Declare 3 EditTexts in your applications layout, as well as a button, and a TextView. Give them unique id's.
The following code will do what you want. It's very simple, so make sure you don't just copy and paste,and that you understand it. I always find it easier to learn from examples, which is why I'm giving one. I hope it helps.
public class MainActivity extends Activity {
//Declare textviews as fields, so they can be accessed throughout the activity.
EditText mEditText1;
EditText mEditText2;
EditText mEditText3;
TextView mTextView;
Button mButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Bind the EditText views
mEditText1 = (EditText)findViewById(R.id.editText1);
mEditText2 = (EditText)findViewById(R.id.editText2);
mEditText3 = (EditText)findViewById(R.id.editText3);
mTextView = (TextView)findViewById(R.id.textView1);
mButton = (Button)findViewById(R.id.calculateButton);
mButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//When the button is clicked, call the calucate method.
calculate();
}
});
}
public void calculate(){
//get entered texts from the edittexts,and convert to integers.
Double value1 = Double.parseDouble(mEditText1.getText().toString());
Double value2 = Double.parseDouble(mEditText2.getText().toString());
Double value3 = Double.parseDouble(mEditText3.getText().toString());
//do the calculation
Double calculatedValue = (value2/value1)*value3;
//set the value to the textview, to display on screen.
mTextView.setText(calculatedValue.toString());
}
}
Joshua F
Updated on January 23, 2022Comments
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Joshua F over 2 years
I'm trying to make an android app, and as I am a total beginner, I am wondering if anyone could help me out with the code.
There will be three boxes to enter different numbers, and I want the app to divide the second value by the first, and then multiply it by the third. And then display the answer on screen.
And the app does have a purpose aha.
So like (b/a)*c
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Stanley Mungai over 11 yearsThere is no Helping with code like that.Please Let us see what you have Done and we'll Help
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Joshua F over 11 yearsWow! Thanks so much for your fast replies. Okay, I'm sorry if I have no idea what I'm doing aha. My friend is making it and I am trying to find bits of code for him. There's a lot of code, but I think this is the bit you are asking for?: It will have to be in two parts because the message will run out of characters.
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Joshua F over 11 yearspublic class MainActivity extends Activity implements View.OnClickListener{ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void OnClick(View v){} public void helpbtn(View v){ new AlertDialog.Builder(this) .setTitle("Help") .setMessage("Numbers" + "Value A" + "Value B" + "Value C")
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Joshua F over 11 years.setNeutralButton("I get it now", null) .show(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } public void onClick(View v) { // TODO Auto-generated method stub } }
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Joshua F over 11 yearsOkay it didn't keep like the lines and stuff, so I posted a new question so you could see it properly: stackoverflow.com/questions/12932336/…
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