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- float e = Float.parseFloat(txtEnergia.getText().toString());
- float u = Float.parseFloat(txtDdp.getText().toString());
- float i = Float.parseFloat(txtCorrenteEletrica.getText().toString());
- float tempo = Float.parseFloat(txtTempo.getText().toString());
- if (e == 0){
- float energia = (u * i * tempo);
- String strDouble = String.format("%.2f", energia);
- lblResultado.setText("E = " + strDouble + " J");
- }
- else if (txtEnergia == null){
- Context context = getApplicationContext();
- CharSequence message = "Campo Vázio";
- int duration = Toast.LENGTH_SHORT;
- final Toast toastBasic = Toast.makeText(context, message, Toast.LENGTH_SHORT);
- toastBasic.show();
- }
- if (u == 0){
- float ddp = (e / (i * tempo));
- String strDouble = String.format("%.2f", ddp);
- lblResultado.setText("U = " + strDouble + " V");
- }
- if (i == 0){
- float corrente = (e / (u * tempo));
- String strDouble = String.format("%.2f", corrente);
- lblResultado.setText("I = " + strDouble + " A");
- }
- if (tempo == 0){
- float segundos = (e / (u * i));
- String strDouble = String.format("%.2f", segundos);
- lblResultado.setText("Tempo = " + strDouble + " s");
- }
- else {
- lblResultado.setText("Campos Inválidos");
- }
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