java.lang.NumberFormatException: unable to parse '' as integer one more time
- by Quzziy
I will take two numbers from user, but this number from EditText must be converted to int. I think it should be working, but I still have problem with compilation code in Android Studio.
CatLog show error in line with:
int wiek = Integer.parseInt(wiekEditText.getText().toString());
Below is my full Android code:
public class MyActivity extends ActionBarActivity {
int Wynik;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
int Tmax, RT;
EditText wiekEditText = (EditText) findViewById(R.id.inWiek);
EditText tspoczEditText = (EditText) findViewById(R.id.inTspocz);
int wiek = Integer.parseInt(wiekEditText.getText().toString());
int tspocz = Integer.parseInt(tspoczEditText.getText().toString());
Tmax = 220 - wiek;
RT = Tmax - tspocz;
Wynik = 70*RT/100 + tspocz;
final EditText tempWiekEdit = wiekEditText;
TabHost tabHost = (TabHost) findViewById(R.id.tabHost); //Do TabHost'a z layoutu
tabHost.setup();
TabHost.TabSpec tabSpec = tabHost.newTabSpec("Calc");
tabSpec.setContent(R.id.Calc);
tabSpec.setIndicator("Calc");
tabHost.addTab(tabSpec);
tabSpec = tabHost.newTabSpec("Hints");
tabSpec.setContent(R.id.Hints);
tabSpec.setIndicator("Hints");
tabHost.addTab(tabSpec);
final Button Btn = (Button) findViewById(R.id.Btn);
Btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"blablabla"+ "Wynik",Toast.LENGTH_SHORT).show();
}
});
wiekEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
Btn.setEnabled(!(tempWiekEdit.getText().toString().trim().isEmpty()));
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.my, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
