Round to 5 decimal places for any language in which the phone is put

I am using the Decimal format class in the code I have below, but I can not get to change the language on my phone is always working (when I say it does not work I mean that does not set the numeric value in the textview that I need, but the problem is not that because as I say, in some languages if you set the normal text and the problem is not translation because if I do not use such formatting or rounding, the code works perfectly for all languages

Here part of my code where the problem is:

public void conversor(Double a, Double a1, Double a2,Double a3,Double a4,Double a5,Double a6,Double a7,Double a8,Double a9,Double a10,Double a11){

        m.setText("  " + a+ " m");
        cm.setText("  " + a1 + " cm");
        km.setText("  " + a2 + " km");
        dc.setText("  "+a3+" dm");
        mm.setText("  "+a4+" mm");
        mc.setText("  "+a5+" mc");
        nm.setText("  "+a6+" nm");
        pies.setText("  "+a7+ " ft");
        pulgadas.setText("  "+a8+" inch");
        millas.setText("  "+a9+" "+getResources (). getString(R.string.millas));
        yardas.setText("  "+a10+" yd");
        leguas.setText("  "+a11+" "+getResources (). getString(R.string.leguas));
    } 


    textoizqu=(EditText)v.findViewById(R.id.textoizq);
     try {
               textoizqu.setOnEditorActionListener(new TextView.OnEditorActionListener()
                { @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event)
                { if(actionId== EditorInfo.IME_ACTION_DONE ||actionId==EditorInfo.IME_ACTION_NEXT)
                {  try {a = Double.parseDouble(textoizqu.getText().toString());
                    DecimalFormat df = new DecimalFormat("#,#####");
                  conversor(Double.parseDouble(df.format(a)),Double.parseDouble(df.format(a*100)),Double.parseDouble(df.format(a/1000)),               Double.parseDouble(df.format(a*10)),Double.parseDouble(df.format(a*1000)),Double.parseDouble(df.format(a*1000000)),                    Double.parseDouble(df.format(a*1000000000)),Double.parseDouble(df.format(a*3.28084)),Double.parseDouble(df.format(a*39.3701)),                   Double.parseDouble(df.format(a*0.000621371)),Double.parseDouble(df.format(a*1.09361)),Double.parseDouble(df.format(a* 0.00020712)));
                    }
                catch (Exception e) {
                    a=0.0;

                }
                } return false; } });
                a = Double.parseDouble(textoizqu.getText().toString());

                conversor(Double.parseDouble(df.format(a)),Double.parseDouble(df.format(a*100)),Double.parseDouble(df.format(a/1000)),
                        Double.parseDouble(df.format(a*10)),Double.parseDouble(df.format(a*1000)),Double.parseDouble(df.format(a*1000000)),
                        Double.parseDouble(df.format(a*1000000000)),Double.parseDouble(df.format(a*3.28084)),Double.parseDouble(df.format(a*39.3701)),
                        Double.parseDouble(df.format(a*0.000621371)),
                        Double.parseDouble(df.format(a*1.09361)),Double.parseDouble(df.format(a* 0.00020712)));
            } catch (Exception e) {

               a=0.0;

            }