Question

I am having EditText and using the numbers inside the EditText for my variables.

I am also having two buttons, one to increase the number in EditText by one and another to decrease it by one.

Can somebody tell me the code to make this possible?

Answer 1

Use the following line in the xml of EditText for setting the input type as number :

<EditText 
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content" 
            android:inputType="number" 
            android:text="200"
            android:id="@+id/editText1" 
            android:layout_alignParentLeft="true">
        </EditText> 

And in source file use the following code to decrease the number by 1:

final EditText ed=(EditText)findViewById(R.id.editText1);

        Button b1=(Button)findViewById(R.id.button01);

        b1.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                int a=Integer.parseInt(ed.getText().toString());

                int b=a-1;

                ed.setText(new Integer(b).toString());
            }
        });

Similarly add one more button in the xml to increase the number by one.