<attr name="customText" format="reference" />
<attr name="customTextSize" format="dimension" />

<declare-styleable name="CustomButton">
	<attr name="customText" />
	<attr name="customTextSize" />
</declare-styleable>

public final class CustomButton extends LinearLayout {
	...
}

public final class CustomButton extends LinearLayout {
    public CustomButton(@NonNull Context context) {
        super(context);
    }

    public CustomButton(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public CustomButton(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
}

public final class CustomButton extends LinearLayout {
    // Attributes
    private String customText;
    private int customTextSize = 999;

    // Views
    private TextView customButtonTvText;

    public CustomButton(@NonNull Context context) {
        super(context);
        init(context);
    }

    public CustomButton(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        parseAttributes(context, attrs);
        init(context);
    }

    public CustomButton(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        parseAttributes(context, attrs);
        init(context);
    }

    private void parseAttributes(@NonNull Context context, @Nullable AttributeSet attrs) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.CustomButton);

        try {
            if (typedArray.hasValue(R.styleable.CustomButton_text))
                customText = typedArray.getString(R.styleable.CustomButton_customText);
            if (typedArray.hasValue(R.styleable.CustomButton_textSize))
                customTextSize = typedArray.getDimensionPixelSize(R.styleable.CustomButton_customTextSize, 0);
        } catch (Throwable t) {
            t.printStackTrace();
        } finally {
            try {
                typedArray.recycle();
            } catch (Throwable t) {
                t.printStackTrace();
            }
        }
    }

    private void initViews() {
        customButtonTvText = findViewById(R.id.custom_button_tv_text);
    }

    private void init(@NonNull Context context) {
        inflate(context, R.layout.button_custom, CustomButton.this);
        initViews();

        if (customText != null) customButtonTvText.setText(customText);
        if (customTextSize != 999) customButtonTvText.setTextSize(TypedValue.COMPLEX_UNIT_PX, customTextSize);
    }

    public void setText(CharSequence text) {
        customButtonTvText.setText(text);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">

    <TextView
        android:id="@+id/custom_button_tv_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:gravity="center"
        android:singleLine="true"
        android:textAllCaps="true"
        android:textColor="@color/white"
        android:textSize="18sp" />
</merge>

<com.example.app.CustomButton
	android:layout_width="match_parent"
	android:layout_height="wrap_content"
	android:layout_margin="12dp"
	app:customText="Tamam"
	app:customTextSize="18sp" />

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:color="#5183c1">

    <item>
        <shape>
            <corners android:radius="4dp" />
            <solid android:color="#135790" />
        </shape>
    </item>
</ripple>

<Button
    android:id="@+id/button"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:text="Buton"
	android:background="@drawable/bg_button"
	/>

https://example.xyz/api  ->  http://example.xyz/api

<?xml version="1.0" encoding="utf-8"?>
<manifest>
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        ...
        ...
        android:usesCleartextTraffic="true"
        ...
    </application>
</manifest>

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">example.xyz</domain>
        <domain includeSubdomains="true">api.example.xyz</domain>
    </domain-config>
</network-security-config>

<?xml version="1.0" encoding="utf-8"?>
<manifest>
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        ...
        ...
        android:networkSecurityConfig="@xml/network_security_config"
        ...
    </application>
</manifest>

android {
    ...
    dataBinding {
        enabled = true
    }
}

<?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <LinearLayout
        android:id="@+id/example_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"
        tools:context=".MainActivity">

        <TextView
            android:id="@+id/hello_world_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Hello World" />
    </LinearLayout>
</layout>

ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);

package com.hknsoft.databinding;

import androidx.appcompat.app.AppCompatActivity;
import androidx.databinding.DataBindingUtil;

import android.os.Bundle;
import android.view.View;

import com.hknsoft.databinding.databinding.ActivityMainBinding;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);

        binding.helloWorldText.setText("Deneme123");

        binding.exampleLayout.setVisibility(View.VISIBLE);
    }
}

implementation 'gun0912.ted:tedpermission:2.2.2'

import com.gun0912.tedpermission.PermissionListener;
import com.gun0912.tedpermission.TedPermission;

public void izinKontrol() {
        PermissionListener permissionListener = new PermissionListener() {
            @Override
            public void onPermissionGranted() {
				//izin verildigi zaman calisacak kodlar
				
                Toast.makeText(MainActivity.this,"Kamera izni verildi", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onPermissionDenied(List<String> deniedPermissions) {
				//izin verilmedigi zaman calisacak kodlar
				
                Toast.makeText(MainActivity.this, "Kamera izni verilmedi", Toast.LENGTH_SHORT).show();
            }
        };

        TedPermission.with(MainActivity.this) //kod hangi activity de ise onu yazin
                .setPermissionListener(permissionListener)
                .setPermissions(Manifest.permission.CAMERA) //ornek olarak kamera sectim. degistirilebilir ve daha fazla izin eklenebilir.
                .check();
    }

SharedPreferences sharedPref = this.getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit(); 
editor.putInt("int", 50); //int
editor.putString("string", "String Veri"); //string
editor.putBoolean("bool", isChecked); //boolean
editor.commit();

SharedPreferences sharedPref = getSharedPreferences("sharedPref", Context.MODE_PRIVATE);
int intValue = sharedPref.getInt("int", 0);
String stringValue = sharedPref.getString("string", "Bos");
Boolean booleanValue = sharedPref.getBoolean("bool", false);

String kopyalatmak_istediginiz_text = "Herhangi bir metin!";

ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
clipboardManager.setText(kopyalatmak_istediginiz_text);

<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"> //Temanın adı AppTheme
		....
</application>

<style name="AppTheme" parent="Theme.AppCompat.NoActionBar"> /*AppTheme temasının style kısmı*/
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
</style>

Toast.makeText(getApplicationContext(), "Gösterilecek Mesajınız", Toast.LENGTH_LONG).show();
//Toast.LENGTH_LONG yerine 2000 girersek 2 sn gösterecektir.

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

android:keepScreenOn="true"

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:keepScreenOn="true">
    ...
</RelativeLayout>