Android App - Multiply And Divide The User Entered Values Values In The Two Forms

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, an

Solution 1:

For taking inputs take 3 EditText and take one Button for get Result by Clicking on it.

Follow this

publicclassresultextendsActivity
{
 private EditText edit1;
private EditText edit2;
private EditText edit3;

publicvoidonCreate(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);

        Buttonclick= (Button)findViewById(R.id.btn);

        click.setOnClickListener(newOnClickListener() {

            publicvoidonClick(View v) {
                inta= Integer.parseInt(edit1.getText().toString());
                intb= Integer.parseInt(edit2.getText().toString());
                intc= Integer.parseInt(edit3.getText().toString());
                doubleresult= ((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"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"android:background="#fff"
 ><EditTextandroid:id="@+id/edit1"android:layout_width="fill_parent"android:layout_height="40dp"android:inputType="text"/><EditTextandroid:id="@+id/edit2"android:layout_width="fill_parent"android:layout_height="40dp"android:inputType="text"/><EditTextandroid:id="@+id/edit3"android:layout_width="fill_parent"android:layout_height="40dp"android:inputType="text"/><Buttonandroid: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.

publicclassMainActivityextendsActivity {
    //Declare textviews as fields, so they can be accessed throughout the activity.
EditText mEditText1;
EditText mEditText2;
EditText mEditText3;
TextView mTextView;
Button mButton;
@OverridepublicvoidonCreate(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(newOnClickListener() {

        @OverridepublicvoidonClick(View v) {
            //When the button is clicked, call the calucate method.
            calculate();
        }
    });

}

publicvoidcalculate(){
    //get entered texts from the edittexts,and convert to integers.Doublevalue1= Double.parseDouble(mEditText1.getText().toString());
    Doublevalue2= Double.parseDouble(mEditText2.getText().toString());
    Doublevalue3= Double.parseDouble(mEditText3.getText().toString());
    //do the calculationDoublecalculatedValue= (value2/value1)*value3;
    //set the value to the textview, to display on screen.
    mTextView.setText(calculatedValue.toString());
}

}

Solution 3:

int answer=(Integer.parse(editTextB.getText()) /Integer.parse(editTextA.getText())*Integer.parse(editTextC.getText()