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setOnClickListener scope on dynamic added elements
do
{
    EditText txt1 = new EditText(this);
    EditText txt2 = new EditText(this);
    Button showtxt = new Button(this);
    linearLayout.addView(showtxt );
    linearLayout.addView(txt1);
    linearLayout.addView(txt2);
    showtxt.setOnClickListener(new View.OnClickListener()
    {
       public void onClick(View v)
       {
           String aaa= txt1 .getText().toString();//HOW TO ACCESS txt1 and txt2 from here
           String bbb= txt2 .getText().toString();
       }
    }
}
while(somecondition)

public class Example extends Activity {
    EditText txt1;
    EditText txt2;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        txt1 = new EditText(this);
        txt2 = new EditText(this);
        ...

do {
    ...
    // EditText[] array = { txt1, txt2 };
    //  is the short version of
    EditText[] array = new EditText[2];
    array[0] = txt1;
    array[1] = txt2;

    showtxt.setTag(array);
    showtxt.setOnClickListener(new View.OnClickListener() {
       public void onClick(View v) {
           EditText[] array = (EditText[]) v.getTag();
           String aaa = array[0].getText().toString();
           String bbb = array[1].getText().toString();
           Log.v("Example", aaa + " " + bbb);
       }
    });
} while(some condition)

View row = new View(this); // or this could be another LinearLayout
row.setBackgroundColor(0x0000ff);

// Create and add the Button and EditTexts to row, as in row.addView(showtxt), etc
...
linearLayout.addView(row);

showtxt.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        View row = v.getParent()
        String aaa = ((EditText) row.getChildAt(1)).getText().toString();
        String bbb = ((EditText) row.getChildAt(2)).getText().toString();
        Log.v("Example", aaa + " " + bbb);
    }
});