seek bar istruzioni non mi fanno partire il programma

[ndrokki]

carissimi se metto le due linee indicate nei commenti //
il programma non parte, mi da errore, perche'? grazie

//seekbar.setOnClickListener( (OnClickListener) this);
//syears.setText(progress+" Years");

<br /> package com.codeherenow.sicalculator;<br /> <br /> import android.app.Activity;<br /> import android.os.Bundle;<br /> import android.view.View.OnClickListener;<br /> import android.widget.Button;<br /> import android.widget.EditText;<br /> import android.widget.SeekBar;<br /> import android.widget.SeekBar.OnSeekBarChangeListener;<br /> import android.widget.TextView;<br /> <br /> public class SICalculatorActivity extends Activity implements OnSeekBarChangeListener {<br /> <br /> private TextView samount,sinterest,syears, slargetext;<br /> private EditText eamounts,einterest;<br /> private SeekBar seekbar;<br /> private Button calculate;<br /> <br /> @Override<br /> protected void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.sicalculator);<br /> <br /> samount=(TextView) findViewById(R.id.amount_text);<br /> sinterest=(TextView) findViewById(R.id.interest_text);<br /> syears=(TextView) findViewById(R.id.years_progressBar);<br /> slargetext=(TextView) findViewById(R.id.result_text);<br /> eamounts =(EditText) findViewById(R.id.edit_Amount);<br /> einterest=(EditText) findViewById(R.id.edit_Interest);<br /> seekbar=(SeekBar) findViewById(R.id.seekBar1);<br /> calculate=(Button) findViewById(R.id.button_calculate);<br /> <br /> //seekbar.setOnClickListener( (OnClickListener) this);<br /> <br /> }<br /> <br /> @Override<br /> public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {<br /> <br /> //syears.setText(progress+" Years");<br /> }<br /> <br /> @Override<br /> public void onStartTrackingTouch(SeekBar arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> <br /> @Override<br /> public void onStopTrackingTouch(SeekBar arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> }<br /> <br /> <br /> <br /> <br /> /*<br /> @Override<br /> public void onProgressChanged(SeekBar seekBar, int progress,<br /> boolean fromUser) {<br /> <br /> }<br /> <br /> <br /> @Override<br /> public void onStartTrackingTouch(SeekBar seekBar) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> <br /> @Override<br /> public void onStopTrackingTouch(SeekBar seekBar) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> }<br /> */<br />

[iClaude76]

carissimi se metto le due linee indicate nei commenti //
il programma non parte, mi da errore, perche'? grazie

//seekbar.setOnClickListener( (OnClickListener) this);
//syears.setText(progress+" Years");

<br /> package com.codeherenow.sicalculator;<br /> <br /> import android.app.Activity;<br /> import android.os.Bundle;<br /> import android.view.View.OnClickListener;<br /> import android.widget.Button;<br /> import android.widget.EditText;<br /> import android.widget.SeekBar;<br /> import android.widget.SeekBar.OnSeekBarChangeListener;<br /> import android.widget.TextView;<br /> <br /> public class SICalculatorActivity extends Activity implements OnSeekBarChangeListener {<br /> <br /> private TextView samount,sinterest,syears, slargetext;<br /> private EditText eamounts,einterest;<br /> private SeekBar seekbar;<br /> private Button calculate;<br /> <br /> @Override<br /> protected void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.sicalculator);<br /> <br /> samount=(TextView) findViewById(R.id.amount_text);<br /> sinterest=(TextView) findViewById(R.id.interest_text);<br /> syears=(TextView) findViewById(R.id.years_progressBar);<br /> slargetext=(TextView) findViewById(R.id.result_text);<br /> eamounts =(EditText) findViewById(R.id.edit_Amount);<br /> einterest=(EditText) findViewById(R.id.edit_Interest);<br /> seekbar=(SeekBar) findViewById(R.id.seekBar1);<br /> calculate=(Button) findViewById(R.id.button_calculate);<br /> <br /> //seekbar.setOnClickListener( (OnClickListener) this);<br /> <br /> }<br /> <br /> @Override<br /> public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {<br /> <br /> //syears.setText(progress+" Years");<br /> }<br /> <br /> @Override<br /> public void onStartTrackingTouch(SeekBar arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> <br /> @Override<br /> public void onStopTrackingTouch(SeekBar arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> }<br /> <br /> <br /> <br /> <br /> /*<br /> @Override<br /> public void onProgressChanged(SeekBar seekBar, int progress,<br /> boolean fromUser) {<br /> <br /> }<br /> <br /> <br /> @Override<br /> public void onStartTrackingTouch(SeekBar seekBar) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> <br /> @Override<br /> public void onStopTrackingTouch(SeekBar seekBar) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> }<br /> */<br />

Il metodo corretto è setOnSeekBarChangeListener(this);

[ndrokki]

Grazie caro,
grazie funziona perfettamente

solo che non riesco a capire come usare la local variable progress fuori dal metodo
ho provato a levare il void per mettere il return progress ma non funziona( forse perche' se metto int dopo public ci sono 3 argomenti.
<br /> public void onProgressChanged(SeekBar seekBar, int progress,<br /> boolean fromUser) {<br /> syears.setText(progress+" Years");<br />