Notes

EDİT TEXT NOT EKLEME DİĞER SAYFAYA GÖNDERME
-----------------------------------------------------------

public class MainActivity extends AppCompatActivity {
public static ArrayList<String> list = new ArrayList<String>(); //EKLEME YAPMAK İÇİN STATİC
EditText et1 ;
Button btnGecis;
String yazi;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et1 = findViewById(R.id.et1);
btnGecis = findViewById(R.id.btnGecis);
btnGecis.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
yazi = et1.getText().toString();
Intent intent = new Intent(MainActivity.this,sonucActivity.class);
intent.putExtra("yazi",yazi);
startActivity(intent);
}
});
}
}
-------------------------------------------------------------
public class sonucActivity extends AppCompatActivity {
int pos;
ListView lv ;
Button btnSil ;
String gelenveri;
ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sonuc);
lv=findViewById(R.id.lv);
gelenveri = getIntent().getExtras().getString("yazi","");
MainActivity.list.add(gelenveri); //GLOBAL TANIMLAMAK İÇİN ACTİVİTY ADINI YAZIYORUZ
btnSil = findViewById(R.id.btnSil);
adapter = new ArrayAdapter<>(this,R.layout.support_simple_spinner_dropdown_item,MainActivity.list); //LİSTEYİ ADAPTERE AKTARIYORUZ
lv.setAdapter(adapter); //ADAPTERİ LİSTVİEWEE AKTARMA
adapter.notifyDataSetChanged();

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //TIKLANDIGINDAKİ POSİTİONU YAKAMA

pos = position;
}
});

btnSil.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MainActivity.list.remove(pos); //SİLME
adapter.notifyDataSetChanged();
}
});
}
}
-------------------------------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/ekran"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<EditText
android:id="@+id/et1"
android:layout_width="287dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginTop="168dp"
android:layout_marginEnd="8dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<Button
android:id="@+id/btnGecis"
android:layout_width="165dp"
android:layout_height="92dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="113dp"
android:layout_marginBottom="8dp"
android:text="Ekle"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="@+id/et1" />

</android.support.constraint.ConstraintLayout>
-------------------------------------------------------------

RADİO BUTON KULLANIMI
-----------------------------
public class MainActivity extends AppCompatActivity {
ConstraintLayout ekran;
RadioGroup rbgrup;
RadioButton rb_kirmizi,rb_sari,rb_mavi,rb_siyah;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ekran=findViewById(R.id.ekran);
rbgrup=findViewById(R.id.rbgrup);
rb_kirmizi=findViewById(R.id.rb_kirmizi);
rb_sari=findViewById(R.id.rb_sari);
rb_siyah=findViewById(R.id.rb_siyah);
rb_mavi=findViewById(R.id.rb_mavi);
rbgrup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
if (rb_kirmizi.isChecked()) {

ekran.setBackgroundColor(Color.RED);
}
else if (rb_mavi.isChecked()) {

ekran.setBackgroundColor(Color.BLUE);
}
else if (rb_siyah.isChecked()) {

ekran.setBackgroundColor(Color.BLACK);
}
else if (rb_sari.isChecked()) {

ekran.setBackgroundColor(Color.YELLOW);
}

}
});
}
}
----------------------------------------------
TASARIM KISMI
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/ekran"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<RadioGroup
android:id="@+id/rbgrup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">

<RadioButton
android:id="@+id/rb_kirmizi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Kırmızı"
tools:layout_editor_absoluteX="54dp"
tools:layout_editor_absoluteY="60dp" />

<RadioButton
android:id="@+id/rb_sari"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Sarı"
tools:layout_editor_absoluteX="54dp"
tools:layout_editor_absoluteY="171dp" />

<RadioButton
android:id="@+id/rb_siyah"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Siyah"
tools:layout_editor_absoluteX="54dp"
tools:layout_editor_absoluteY="230dp" />

<RadioButton
android:id="@+id/rb_mavi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Mavi"
tools:layout_editor_absoluteX="54dp"
tools:layout_editor_absoluteY="115dp" />
</RadioGroup>

</android.support.constraint.ConstraintLayout>
--------------------------------------------------
HESAP MAKİNESİ
-----------------------------------
public class MainActivity extends AppCompatActivity {
EditText etS1,etS2;
TextView tvS;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
etS1=findViewById(R.id.etS1);
etS2=findViewById(R.id.etS2);
tvS=findViewById(R.id.tvS);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
System.exit(0);
}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, 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 s1,s2,sonuc;
s1=Integer.parseInt(etS1.getText().toString());
s2=Integer.parseInt(etS2.getText().toString());


int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.Topla) {
sonuc=s1+s2;
tvS.setText(s1+ "+" +s2+ "="+sonuc);
return true;
} else if (id == R.id.Cıkar){
sonuc=s1-s2;
tvS.setText(s1+ "-" +s2+ "="+sonuc);
return true;
}
else if (id == R.id.Carp){
sonuc=s1*s2;
tvS.setText(s1+ "*" +s2+ "="+sonuc);
return true;
}
else if (id == R.id.Bol){
sonuc=s1/s2;
tvS.setText(s1+ "/" +s2+ "="+sonuc);
return true;
}
else if (id == R.id.Sil){
etS1.setText("");
etS2.setText(null);
tvS.setText("");
return true;
}


return super.onOptionsItemSelected(item);
}
}

------------------------------------------
MENU MAİN XML
--------------
<item
android:id="@+id/Cıkar"
android:orderInCategory="100"
android:title="Cıkar"
android:icon="@drawable/cikar"
app:showAsAction="always" />


-----------------------------------------------
TOAST MESAJ 3 Tane
-----------------------------
public class MainActivity extends AppCompatActivity {

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

public void basitToast(View view) {

Toast.makeText(this,"Basit Toasta Basıldı!!",Toast.LENGTH_LONG).show();


}

public void resimliToast(View view) {
ImageView winx =new ImageView(MainActivity.this);
winx.setImageResource(R.drawable.bloom);
Toast toast=new Toast(getApplicationContext());
toast.setView(winx);
toast.setDuration(Toast.LENGTH_LONG);
toast.show();
}

public void ozelToast(View view) {
TextView yazi =new TextView(getApplicationContext());
yazi.setTextSize(25);
yazi.setTextColor(Color.GREEN);
yazi.setText("Süslü yazı");
Toast toast =new Toast(getApplicationContext());
toast.setView(yazi);
toast.setDuration(Toast.LENGTH_LONG);
toast.show();
}
}
----------------------------
NESNELER
--------------
public class MainActivity extends AppCompatActivity {
ToggleButton tbTitresim;
TextView tvToggle;
Vibrator titresim;
Button btnKaydet;
CheckBox cbOnay;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tbTitresim=findViewById(R.id.tbTitresim);
tvToggle=findViewById(R.id.tvToggle);
cbOnay=findViewById(R.id.cbOnay);
btnKaydet=findViewById(R.id.btnKaydet);
titresim=(Vibrator)this.getSystemService(Context.VIBRATOR_SERVICE);
tbTitresim.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
boolean on=((ToggleButton)view).isChecked();
if (on) {
tvToggle.setText("Açık");
titresim.vibrate(10000);

} else {
tvToggle.setText("Kapalı");
titresim.cancel();
}
}
});
cbOnay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
boolean durum=cbOnay.isChecked();
if(durum==true)
{
btnKaydet.setVisibility(View.VISIBLE);
btnKaydet.setEnabled(true);
} else {
btnKaydet.setVisibility(View.INVISIBLE);
btnKaydet.setEnabled(false);
}
}
});
btnKaydet.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
Toast.makeText(MainActivity.this,"KAYDEDİLDİ",Toast.LENGTH_SHORT).show();
btnKaydet.setVisibility(View.INVISIBLE);
btnKaydet.setEnabled(false);
cbOnay.setChecked(false);
}
});

}
}
-------------------
Andoid manifest
--------------
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.metin.nesneler">
<uses-permission android:name="android.permission.VIBRATE"></uses-permission>

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>
---------------------------
Spinner Kullanımı
--------------------------------
public class MainActivity extends AppCompatActivity {
EditText etSayi1,etsayi2;
Spinner menu;

ArrayAdapter veriAdaptoru;
String islemler [] = {"Toplama","Cikarma","Carpma","Bolme","Silme"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etSayi1=findViewById(R.id.etSayi1);
etsayi2=findViewById(R.id.etSayi2);
Spinner menu =(Spinner)findViewById(R.id.menu);
ArrayAdapter<String> veriAdaptoru = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,android.R.id.text1,islemler);
menu.setAdapter(veriAdaptoru);


menu.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
if(menu.getSelectedItem().toString().equals(islemler[0])) {
float s1=Float.parseFloat(etSayi1.getText().toString());
float s2=Float.parseFloat(etsayi2.getText().toString());
float sonuc=(float) (s1+s2);

Intent a= new Intent(MainActivity.this,Sonuc_Activity.class);
a.putExtra("sonuc",s1+"+"+s2+"="+sonuc);


} else if(menu.getSelectedItem().toString().equals(islemler[1])) {
float s1=Float.parseFloat(etSayi1.getText().toString());
float s2=Float.parseFloat(etsayi2.getText().toString());
float sonuc=(float) (s1-s2);
Intent a= new Intent(MainActivity.this,Sonuc_Activity.class);
a.putExtra("sonuc",s1+"-"+s2+"="+sonuc);

}


else if(menu.getSelectedItem().toString().equals(islemler[2])) {
float s1=Float.parseFloat(etSayi1.getText().toString());
float s2=Float.parseFloat(etsayi2.getText().toString());
float sonuc=(float) (s1*s2);
Intent a= new Intent(MainActivity.this,Sonuc_Activity.class);
a.putExtra("sonuc",s1+"*"+s2+"="+sonuc);

}


else if(menu.getSelectedItem().toString().equals(islemler[3])) {
float s1=Float.parseFloat(etSayi1.getText().toString());
float s2=Float.parseFloat(etsayi2.getText().toString());
float sonuc=(float) (s1/s2);
Intent a= new Intent(MainActivity.this,Sonuc_Activity.class);
a.putExtra("sonuc",s1+"/"+s2+"="+sonuc);

}


else if(menu.getSelectedItem().toString().equals(islemler[4])) {

etSayi1.getText().clear();
//etSayi1.setText( " ");
etsayi2.getText().clear();

}}
});
}}



sonuç_Activity
public class Sonuc_Activity extends AppCompatActivity {
TextView tvSonuc;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sonuc_);
tvSonuc=findViewById(R.id.tvSonuc);

float sonuc= getIntent().getExtras().getFloat("sonuc",(float) 0);
tvSonuc.setText(String.valueOf(sonuc));


}

}