Notes

--------------TOAST ÖRNEK ---------------------------
--------------MAIN ACTİVİTY---------------------------
public void basitToast(View view) { //R.DRAWABLE A RESİMLERİ KOY

Toast.makeText(this,"Basit toasta basıldı.",Toast.LENGTH_SHORT).show(); //basit toast yapımı btnonclick

}

public void resimliToast(View view) { //RESİMLİ TOAST GÖSTERME //BUTTTON RESİMLITOAST ONCLICKINE YAZILDI
ImageView kedi = new ImageView(MainActivity.this);
kedi.setImageResource(R.drawable.kedi); //dosya yolunu belirtmiş
Toast toast = new Toast (getApplicationContext()); //bu applicationda geçerli
toast.setView(kedi); //kediyi toast mesaja koy
toast.setDuration(Toast.LENGTH_LONG);
toast.show();

}

public void yaziliToast(View view) { //BELİRLENEN YAZI ŞEKLİNE GÖRE TOAST GÖSTERME

TextView yazi = new TextView(getApplicationContext());
yazi.setTextSize(25);
yazi.setTextColor(Color.RED);
yazi.setText("Süslü Yazı");
Toast toast = new Toast(getApplicationContext());
toast.setView(yazi);
toast.setDuration(Toast.LENGTH_LONG);
toast.show();


}

--------------RADİOBUTTON ÖRNEK ---------------------------
--------------MAIN ACTİVİTY---------------------------


RadioGroup rbGroup ;
RadioButton rbKirmizi;
RadioButton rbSari,rbSiyah;
ConstraintLayout ekran;


@Override
protected void onCreate(Bundle savedInstanceState) { //RADİOBUTTONLAR RADİOBUTTONUN İÇERİSİNDE OLMASI LAZIM
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ekran = findViewById(R.id.ekran);
rbGroup = findViewById(R.id.RbGroup);
rbKirmizi = findViewById(R.id.rbKirmizi);
rbSari = findViewById(R.id.rbSari);
rbSiyah = findViewById(R.id.rbSiyah);

rbGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { //RADİOBUTTONUN HANGİSİ TIKLANMA NESNESİ
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (rbKirmizi.isChecked()) //İSCHECKED TIKLANDI İSE
{
ekran.setBackgroundColor(Color.RED);
}
if (rbSari.isChecked())
{
ekran.setBackgroundColor(Color.YELLOW);
}
if (rbSiyah.isChecked())
{
ekran.setBackgroundColor(Color.BLACK);
}


}
});


}
--------------RESİM TIKLAYARAK DEGİŞTİRME ÖRNEK ---------------------------
--------------MAIN ACTİVİTY---------------------------



ImageView resim1;
int sayac = 0 ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
resim1 = findViewById(R.id.imgView);
resim1.setOnClickListener(new View.OnClickListener() { //IMAGEVİEW E TIKLANDIGINDA CALISACAK KOD
@Override
public void onClick(View v) {

if (sayac % 2 == 0) //
{
resim1.setImageResource(R.drawable.tir2); //IMAGEVİEW E RESİM ATAMA
sayac++;
}
else
{
resim1.setImageResource(R.drawable.tir1);
sayac++;
}

}
});

}

--------------SPİNNERLI HESAP MAKİNASI ÖRNEK ---------------------------
--------------MAIN ACTİVİTY---------------------------

public class MainActivity extends AppCompatActivity {


EditText et1,et2;
TextView tvSonuc;
List<String> list;
Spinner spinner;
ArrayAdapter<String> adapter;

double s1,s2;

double sonuc ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spinner = findViewById(R.id.spinner);
et1 = findViewById(R.id.et1);
et2= findViewById(R.id.et2);
tvSonuc=findViewById(R.id.tvSonuc);

list = new ArrayList<>();
list.add("Bir işlem Seç");
list.add("Toplama");
list.add("Cikarma");
list.add("Carpma");
list.add("Bolme");

adapter = new ArrayAdapter<>(this,android.R.layout.simple_spinner_dropdown_item,list);// adapter ı listeye aktarma
spinner.setAdapter(adapter); //adapter a spinner a aktarma

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { // spinner seçili işlemi position ile bulma
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (position != 0){ //program ilk açıldığında bir işlem seç seçili değilse çalışsın.

s1 = Double.parseDouble(et1.getText().toString());
s2 = Double.parseDouble(et2.getText().toString());

if (position == 1)
{
sonuc = s1+s2;

}
if (position == 2)
{
sonuc = s1-s2;

}

}


}
@Override
public void onNothingSelected(AdapterView<?> parent) {

}
});


}

public void btnHesap(View view) {

tvSonuc.setText(sonuc+"");

}

}


--------------INTENT SAYFA GEÇİŞ VİZE FİNAL ÖRNEK ---------------------------
--------------MAIN ACTİVİTY---------------------------

ad = findViewById(R.id.etad);
s1=findViewById(R.id.ets1);
s2=findViewById(R.id.ets2);
btn = findViewById(R.id.btnHesap);


btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
byte vize = Byte.parseByte(s1.getText().toString());
byte fnl = Byte.parseByte(s2.getText().toString());
String isim = ad.getText().toString();

int bn = (vize+fnl)/2;

Intent i = new Intent(MainActivity.this,sonucActivity.class);
i.putExtra("isim",isim);
i.putExtra("basari",bn);
startActivity(i);

}
});


--------------SONUC ACTİVİTY ÖRNEK ---------------------------
--------------MAIN ACTİVİTY---------------------------


tvAd = findViewById(R.id.textView);
tvSonuc = findViewById(R.id.textView2);
String ad = getIntent().getExtras().getString("isim","");
tvAd.setText(ad);
int bn = getIntent().getExtras().getInt("basari",0);
tvSonuc.setText(String.valueOf(bn));
----------------------------------------------------------------


--------------SPİNNER İLE SEÇİLDİGİ AN HESAPLATIP GEÇİŞ ---------------------------
--------------MAIN ACTİVİTY---------------------------
EditText et1, et2;
Spinner spinner;
String islemler[] = new String[]{"İşlemi Seçiniz", "toplama", "cıkarma"}; //SPİNNER İÇİN DİZİ
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


et1 = findViewById(R.id.etS1);
et2 = findViewById(R.id.etS2);
spinner = findViewById(R.id.sp);
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, islemler); //DİZİYİ ARRAY ADAPTERE AKTARMA

spinner.setAdapter(arrayAdapter);

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

int s1 = Integer.parseInt( et1.getText().toString());
int s2 = Integer.parseInt( et2.getText().toString());
int sonuc ;
Intent intent = new Intent(MainActivity.this,sonucActivity.class);

if(position == 1)
{
sonuc = s1+s2;
intent.putExtra("sonuc",sonuc);
startActivity(intent);
}

if(position == 2)
{
sonuc = s1-s2;
intent.putExtra("sonuc",sonuc);
startActivity(intent);
}
}


@Override
public void onNothingSelected(AdapterView<?> parent) {

}
});

}
}
--------------SPİNNER İLE SEÇİLDİGİ AN HESAPLATIP GEÇİŞ ---------------------------
--------------SONUC ACTİVİTY---------------------------
setContentView(R.layout.activity_sonuc);
tvSonuc = findViewById(R.id.tvSonuc);

int bn = getIntent().getExtras().getInt("sonuc",(int) 0);
tvSonuc.setText(bn+"");



--------------BASİT HESAP MAKİNESİ ---------------------------
--------------SONUC ACTİVİTY---------------------------

Button btnTopla,btnCikar,BtnCarp,btnBol;
EditText ets1,ets2;
TextView tvSonuc;
double s1 ;
double s2 ;
double sonuc;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

btnTopla = findViewById(R.id.btntopla);
btnCikar = findViewById(R.id.btncıkar);
BtnCarp = findViewById(R.id.btncarp);
btnBol= findViewById(R.id.btnBol);
ets1 = findViewById(R.id.et1);
ets2 = findViewById(R.id.et2);
tvSonuc = findViewById(R.id.tvSonuc);
}

public void topla(View view) {
s1= Double.parseDouble(ets1.getText().toString());
s2= Double.parseDouble(ets2.getText().toString());
sonuc = s1+s2;
tvSonuc.setText(s1+" - "+s2 +" = "+sonuc);;
}

public void cikar(View view) {
s1= Double.parseDouble(ets1.getText().toString());
s2= Double.parseDouble(ets2.getText().toString());
sonuc = s1-s2;
tvSonuc.setText(s1+" + "+s2 +" = "+sonuc);
}
public void carp(View view) {

s1= Double.parseDouble(ets1.getText().toString());
s2= Double.parseDouble(ets2.getText().toString());
sonuc = s1*s2;
tvSonuc.setText(s1+" * "+s2 +" = "+sonuc);
}

public void bol(View view) {

s1= Double.parseDouble(ets1.getText().toString());
s2= Double.parseDouble(ets2.getText().toString());
sonuc = s1/s2;
tvSonuc.setText(s1+" / "+s2 +" = "+sonuc);
}
}