How To Handle With Addtextchangedlistener And Memory

public class MainActivity extends AppCompatActivity { EditText Percent, mmolGlic, mgGlic; double mmol = 0, mg = 0, perc = 0; @Override protected void onCreate(Bundle savedInstanc

Solution 1:

public class MainActivity extends AppCompatActivity {

EditText Percent, mmolGlic, mgGlic;

double mmol = 0, mg = 0, perc = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Percent = (EditText) findViewById(R.id.percent);
    mmolGlic = (EditText) findViewById(R.id.mmol_glic);
    mgGlic = (EditText) findViewById(R.id.mg_glic);

 Percent.addTextChangedListener(percentWatcher);
        mmolGlic.addTextChangedListener(mmolGlicTextWatcher);
        mgGlic.addTextChangedListener(mgGlicWatcher);
}

 public void frommMol() {
        if (!mmolGlic.getText().toString().trim().isEmpty()) {
            mmol = Double.parseDouble(mmolGlic.getText().toString());
            perc = (mmol / 10.929) + 2.15;
            Percent.removeTextChangedListener(percentWatcher);
            Percent.setText(String.format("%.2f", perc));
            Percent.addTextChangedListener(percentWatcher);
        }
    }

    public void fromPercent() {
        if (!Percent.getText().toString().trim().isEmpty()) {
            perc = Double.parseDouble(Percent.getText().toString().trim());
            mmol = (perc - 2.15) * 10.929;
            mmolGlic.removeTextChangedListener(mmolGlicTextWatcher);
            mgGlic.removeTextChangedListener(mgGlicWatcher);
            mmolGlic.setText(String.format("%.2f", mmol));
            mg = (perc * 28.7) - 46.7;
            mgGlic.setText(String.format("%.2f", mg));
            mmolGlic.addTextChangedListener(mmolGlicTextWatcher);
            mgGlic.addTextChangedListener(mgGlicWatcher);
        }
    }

    public void frommg() {
        if (!mgGlic.getText().toString().trim().isEmpty()) {
            mg = Double.parseDouble(mgGlic.getText().toString());
            perc = (mg + 46.7) / 28.7;
            Percent.removeTextChangedListener(percentWatcher);
            Percent.setText(String.format("%.2f", perc));
            Percent.addTextChangedListener(percentWatcher);
        }
    }


    private TextWatcher percentWatcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            fromPercent();
        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    };

    private TextWatcher mgGlicWatcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            frommg();
        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    };

    private TextWatcher mmolGlicTextWatcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                frommMol();
        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    };

}


Hope this will help you.

Solution 2:

well what it looks like, that you are doing your operation even if you don't have any text to work with.. i would recommend, do a null/empty check on the editTextView before you do thefromPercent(); operation. Hope that helps.