I cant use Google Translate API in my Android Studio

Question

I am trying to create a translation app that uses google translate api and I keep on having error in my program here. I really do not know what to do, in the error it states that "Create method 'translate' in 'Translate'. I am not trying to create a method, but rather it should accept the language code to be translated.

translate.translate(
                            txtEdit,
                            TranslateOption.sourceLanguage(firstLang),
                            TranslateOption.targetLanguage(secondLang));

Here is my whole class

public class Translate extends AppCompatActivity {

    TextView txtlogo;
    private Spinner spnFrom, spnTo;
    private MaterialButton btnTranslate;
    private TextInputEditText txtEdit, txtOutput;
    private String originalText;
    private String translatedText;
    String fromChoice, toChoice;
    String firstLang,secondLang;

    Translate translate;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_translate);

        //HOOKS
        spnFrom = findViewById(R.id.spnTfrom);
        spnTo = findViewById(R.id.spnTto);
        btnTranslate = findViewById(R.id.btnTtranslate);
        txtEdit = findViewById(R.id.txtTeditsource);
        txtOutput = findViewById(R.id.txtTtranslatedsource);

        ArrayAdapter<CharSequence> fromadapter = ArrayAdapter.createFromResource(this, R.array.language, R.layout.spinner_layout);
        fromadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spnFrom.setAdapter(fromadapter);
        spnTo.setAdapter(fromadapter);

        btnTranslate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                getTranslateService();
                Translate translate = (Translate) TranslateOptions.getDefaultInstance().getService();

                spnFrom.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                    @Override
                    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                        fromChoice = adapterView.getItemAtPosition(i).toString();
                        if (fromChoice.equals("Select Language")){
                            Toast.makeText(getApplicationContext(), "Please select a language (from)", Toast.LENGTH_LONG).show();
                        } else if (fromChoice.equals("Bisaya")){
                            firstLang = "ceb";
                        } else firstLang = "tl";
                    }

                    @Override
                    public void onNothingSelected(AdapterView<?> adapterView) {
                        Toast.makeText(getApplicationContext(), "Please select a language (from)", Toast.LENGTH_LONG).show();
                    }
                });

                spnTo.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                    @Override
                    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                        toChoice = adapterView.getItemAtPosition(i).toString();
                        if (toChoice.equals("Select Language")){
                            Toast.makeText(getApplicationContext(), "Please select a language (from)", Toast.LENGTH_LONG).show();
                        } else if (fromChoice.equals("Tagalog")){
                            secondLang = "tl";
                        } else secondLang = "ceb";
                    }

                    @Override
                    public void onNothingSelected(AdapterView<?> adapterView) {
                        Toast.makeText(getApplicationContext(), "Please select a language (from)", Toast.LENGTH_LONG).show();
                    }
                });

                Translation translation =
                        translate.translate(
                                txtEdit,
                                TranslateOption.sourceLanguage(firstLang),
                                TranslateOption.targetLanguage(secondLang));


            }
        });
    }


    public void getTranslateService() {

        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);

        try (InputStream is = getResources().openRawResource(R.raw.credentials)) {

            //Get credentials:
            final GoogleCredentials myCredentials = GoogleCredentials.fromStream(is);

            //Set credentials and get translate service:
            TranslateOptions translateOptions = TranslateOptions.newBuilder().setCredentials(myCredentials).build();

        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }
} ```