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  1. PO
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    <p>You have to initialize Your button addtotal1:</p> <pre><code> addtotal1 = (Button)findViewById(R.id.yourButtonId); </code></pre> <p>before You could set onClickListener.</p> <h2>EDIT</h2> <p>Your xml EditText has only the inputType "number", so the user can´t put some decimal values. If You want it like this, You don´t need double variables. Instead of double, use int, so Your result is without showing decimal point:</p> <pre><code> public class durood extends Activity{ private TextView txtCount; private TextView totalCount; private EditText enteramount; private Button btnCount; private Button addtotal1; private Button addtotal2; private Button cleartotal; private static int count=0; private int x=0; private int y=0; private int z=0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // The activity is being created. setContentView(R.layout.durood); enteramount = (EditText)findViewById(R.id.enteramount); totalCount = (TextView)findViewById(R.id.totalCount); addtotal1=(Button)findViewById(R.id.addtototal1); addtotal2=(Button)findViewById(R.id.addtototal2); //add to total 1 addtotal1.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { x=Integer.parseInt(enteramount.getText().toString()); y=Integer.parseInt(totalCount.getText().toString()); z=x+y; totalCount.setText(Integer.toString(z)); //to set value of enteramount to 0 enteramount.setText("0"); //or enteramaount.setText("") if You want show nothing } }); </code></pre>
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    1. POAdd value of edittext and textview together and displaying total in text view
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    1. USOpiatefuchs
    1. USOpiatefuchs
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    1. POAdd value of edittext and textview together and displaying total in text view
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    1. VO
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    1. COyeah I did this already, forgot to add it to the code above which I extracted, thanks for pointing out
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      1. USMustafa
    2. COok, if this was not the reason, I can´t find the bug. Your code looks good, and the stack trace doesn´t show a mistake made by yourself. Please post your durood.xml, maybe there is a mistake or a thing You could do better.
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      1. USOpiatefuchs
    3. COI have now posted the xml too, thanks
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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