Je travaille avec des nombres entiers et j'essaie de faire des calculs qui impliquent des nombres décimaux aux parties. J'ai déjà utilisé cette même configuration auparavant et cela avait fonctionné mais pour une raison quelconque cela ne fonctionne pas.Entiers et calculs
package table.periodic;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.AdapterView.OnItemSelectedListener;
public class Gram2mol extends Activity implements AdapterView.OnItemSelectedListener {
private Spinner Spinner01;
private TextView elementnumber;
private EditText grams;
private Button calculate;
private TextView moles5;
String[] element={"Actinium", "Aluminum", "Americium",
"Antimony", "Argon", "Arsenic", "Astatine", "Barium",
"Berkelium", "Beryllium", "Bismuth", "Bohrium", "Boron",
"Bromine", "Cadmium", "Calcium", "Californium", "Carbon",
"Cerium", "Cesium", "Chlorine", "Chromium", "Cobalt",
"Copernicium", "Copper", "Curium", "Darmstadtium", "Dubnium",
"Dysprosium", "Einsteinium", "Erbium", "Europium", "Fermium",
"Fluorine", "Francium", "Gadolinium", "Gallium", "Germanium",
"Gold", "Hafnium", "Hassium", "Helium", "Holmium",
"Hydrogen", "Indium", "Iodine", "Iridium", "Iron",
"Krypton", "Lanthanum", "Lawrencium", "Lead", "Lithium",
"Lutetium", "Magnesium", "Manganese", "Meitnerium", "Mendelevium",
"Mercury", "Molybdenum", "Neodymium", "Neon", "Neptunium",
"Nickel", "Niobium", "Nitrogen", "Nobelium", "Osmium",
"Oxygen", "Palladium", "Phosphorus", "Platinum", "Plutonium",
"Polonium", "Potassium", "Praseodymium", "Promethium", "Protactinium",
"Radium", "Radon", "Rhenium", "Rhodium", "Roentgenium", "Rubidium",
"Ruthenium", "Rutherfordium", "Samarium", "Scandium", "Seaborgium",
"Selenium", "Silicon", "Silver", "Sodium", "Strontium", "Sulfur",
"Tantalum", "Technetium", "Tellurium", "Terbium", "Thallium", "Thorium",
"Thulium", "Tin", "Titanium", "Tungsten", "Ununpentium", "Ununquadium",
"Ununtrium", "Uranium", "Vanadium", "Xenon", "Ytterbium", "Yttrium", "Zinc",
"Zirconium"};
public void onCreate(Bundle icicle){
super.onCreate(icicle);
setContentView(R.layout.grams2moles);
elementnumber = (TextView) findViewById(R.id.elementnumber);
grams = (EditText) findViewById(R.id.grams);
calculate = (Button) findViewById(R.id.calculate);
calculate.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {my_func01();}});
Spinner spin = (Spinner) findViewById(R.id.elements);
spin.setOnItemSelectedListener((OnItemSelectedListener) this);
ArrayAdapter<String> aa=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, element);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin.setAdapter(aa);
}
void my_func01(){
int grams2;
int elementnumber2;
int moles2;
grams2 = Integer.parseInt(grams.getText().toString());
elementnumber2 = Integer.parseInt(elementnumber.getText().toString());
moles2 = (grams2 * (1/elementnumber2));
moles5.setText("" + moles2);
}
public void setSpinner01(Spinner spinner01) {
Spinner01 = spinner01;
}
public Spinner getSpinner01() {
return Spinner01;
}
public void onItemSelected(AdapterView<?> parent, View v, int position, long id)
{
if ("Actinium".equals(element[position]))
{elementnumber.setText("227");}
if ("Aluminum".equals(element[position]))
{elementnumber.setText("26.981538");}
if ("Americium".equals(element[position]))
{elementnumber.setText("243");}
if ("Antimony".equals(element[position]))
{elementnumber.setText("121.760");}
if ("Argon".equals(element[position]))
{elementnumber.setText("39.948");}
if ("Arsenic".equals(element[position]))
{elementnumber.setText("74.9216");}
if ("Astatine".equals(element[position]))
{elementnumber.setText("210");}
if ("Barium".equals(element[position]))
{elementnumber.setText("137.327");}
if ("Berkelium".equals(element[position]))
{elementnumber.setText("247");}
if ("Bismuth".equals(element[position]))
{elementnumber.setText("208.9804");}
if ("Bohrium".equals(element[position]))
{elementnumber.setText("264");}
if ("Boron".equals(element[position]))
{elementnumber.setText("10.811");}
if ("Bromine".equals(element[position]))
{elementnumber.setText("79.904");}
if ("Cadmium".equals(element[position]))
{elementnumber.setText("112.41");}
if ("Calcium".equals(element[position]))
{elementnumber.setText("40.078");}
if ("Californium".equals(element[position]))
{elementnumber.setText("251");}
if ("Carbon".equals(element[position]))
{elementnumber.setText("12.0107");}
if ("Cerium".equals(element[position]))
{elementnumber.setText("140.116");}
if ("Cesium".equals(element[position]))
{elementnumber.setText("132.90545");}
if ("Chlorine".equals(element[position]))
{elementnumber.setText("35.453");}
if ("Chromium".equals(element[position]))
{elementnumber.setText("51.996");}
if ("Copper".equals(element[position]))
{elementnumber.setText("63.546");}
if ("Curium".equals(element[position]))
{elementnumber.setText("247");}
}
public void onNothingSelected(AdapterView<?> arg0) {
elementnumber.setText("227");
}
}
mon erreur est ce
09-22 20:02:58.353: ERROR/AndroidRuntime(17745): Uncaught handler: thread main exiting due to uncaught exception
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): java.lang.NullPointerException
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at table.periodic.Gram2mol.my_func01(Gram2mol.java:77)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at table.periodic.Gram2mol$1.onClick(Gram2mol.java:56)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.View.performClick(View.java:2364)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.View.onTouchEvent(View.java:4179)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.widget.TextView.onTouchEvent(TextView.java:6592)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.View.dispatchTouchEvent(View.java:3709)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:924)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1695)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1116)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.app.Activity.dispatchTouchEvent(Activity.java:2068)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1679)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.view.ViewRoot.handleMessage(ViewRoot.java:1697)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.os.Handler.dispatchMessage(Handler.java:99)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.os.Looper.loop(Looper.java:123)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at android.app.ActivityThread.main(ActivityThread.java:4568)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at java.lang.reflect.Method.invokeNative(Native Method)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at java.lang.reflect.Method.invoke(Method.java:521)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
09-22 20:02:58.513: ERROR/AndroidRuntime(17745): at dalvik.system.NativeStart.main(Native Method)
ligne 77 est le "moles5.setText (" "+ moles2);"
Je ne crois pas que je me mêle d'identifiant, donc je ne m'inquiète pas pour ça et ça ne semble pas être ce genre d'erreur. Si quelqu'un a des idées faites le moi savoir. Merci.
Ok. Merci. Je n'ai pas réalisé cela. Je l'ai fait un peu ces derniers temps. Je l'ai tout fonctionne maintenant. –