Question

I am not a programmer I just like to make apps that help me for my work so I dont know alot about programming properly. That being said this is what I am up against. I enter a number for 1 to 100 and then my app will create a scrollable tablelayout with that many rows. Each row has a textview, an edittext and another textview here my code:

TableLayout tL = (TableLayout)findViewById(R.id.tableLayout1);
    // creates all the fields
    for(int i = 1; i <= numOfInjWells; i++) {
        TableRow tR = new TableRow(this);
        // creates the textView
        TextView tV1 = new TextView(this);
        tV1.setText("      " + i + ":    ");

        // add edit text
        EditText eT = new EditText(this);
        eT.setText("Meter Reading");
        eT.setInputType(InputType.TYPE_CLASS_NUMBER);

        TextView tV2 = new TextView(this);
        tV2.setText("");

        // add the TextView and the editText to the new TableRow
        tR.addView(tV1);
        tR.addView(eT);
        tR.addView(tV2);

        // add the TableRow to the TableLayout
        tL.addView(tR,new TableLayout.LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));    
    } // end for statement

so when I input a number in the edittext (eT) of row one I want it to then calculate the difference between it and a number I have stored in my database (I already know how to get the specific number I need from the database) and then change the textview tV2 in row one so it displays the difference without clicking a button. The problem that I am coming across is how do I associate edittext (eT) in row one with textview (tV2) because all the edittext and textviews have the same name eT or tV2

thanks for you help and I am sorry that I dont know much about coding.

edit: I thought about adding

eT.setId(i);
tV2.setId(i); 

but I dont know how to use that in my calculations.

Answer 1

After looking into listview I couldnt get them to work with the edittext so I went back to my tablelayout and this is the final working version.

Here I create the fields and a textwatcher added to the edittext to watch for changes:

    TableLayout tL = (TableLayout)findViewById(R.id.tableLayout1);
    // creates all the fields
    for(int i = 1; i <= numOfInjWells; i++) {
        TableRow tR = new TableRow(this);
        // creates the textView
        TextView tV1 = new TextView(this);
        tV1.setText("       " + i + ":    ");

        // add edit text
        eT = new EditText(this);
        eT.setInputType(InputType.TYPE_CLASS_NUMBER);
        eT.setWidth(100);
        eT.setId(1000 + i);
        eT.addTextChangedListener(new CustomTextWatcher(eT));

        tV2 = new TextView(this);
        tV2.setText("");
        tV2.setId(2000 + i);

        // add the TextView and the editText to the new TableRow
        tR.addView(tV1);
        tR.addView(eT);
        tR.addView(tV2);

        // add the TableRow to the TableLayout
        tL.addView(tR,new TableLayout.LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));    
    } // end for statement

next I created this class for my customtextwachter:

private class CustomTextWatcher implements TextWatcher {
    private EditText mEditText;

    public CustomTextWatcher(EditText eT) {
        mEditText = eT;
    }

    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

    public void afterTextChanged(Editable s) {
        // gets the change amount for each meter reading from the previous reading
            // this method does the work
        getMeterChange();

    }
} // end class CustomTextWatcher

the getMeterChange() method does the work:

public void getMeterChange() {
    int preMeterReading = 0;
    int mReading = 0;

    try {
        cRWLogData.moveToPosition(recordLookUp - 1);
        preMeterReading = cRWLogData.getInt( 14 + rowChanged);
        // finds the edittext that has focus
        View currView = tL.findFocus();
        int currentid = tL.findFocus().getId();
        // gets the string from the edittext and changes it to a int
        EditText currentComponent = (EditText) currView;
        String eTValue = currentComponent.getText().toString();
        mReading = Integer.parseInt(eTValue);
        // calculates difference for what is entered and what is in database
        mChange = mReading - preMeterReading;
        // makes the textview in the same tablerow as the edittext active
        TextView tV2 = (TextView) findViewById(currentid + 1000);
        // sets the text of the textview
        tV2.setText("     " + mChange +"");
    } // end try
    catch (Exception e) {}

} // end getMeterChange