Toast toast = Toast.makeText(getApplicationContext(), "Mesajımız..", Toast.LENGTH_LONG);
toast.show();

Toast toast = Toast.makeText(getApplicationContext(), "Mesajımız..", Toast.LENGTH_LONG)show();

Toast.makeText(this, "Mesajımız..", Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"Mesajımız..",Toast.LENGTH_LONG).show();

    toast.setGravity(Gravity.TOP|Gravity.LEFT, 0, 0); 

Toast toast = Toast.makeText(getApplicationContext(), "Mesajımız...", Toast.LENGTH_LONG);
toast.setGravity(Gravity.TOP|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();

Toast toast = Toast.makeText(getApplicationContext(), "Mesajımız...", Toast.LENGTH_LONG);
toast.setGravity(Gravity.BOTTOM|Gravity.LEFT, 0, 0);
toast.show();

Toast.makeText(getApplicationContext(), "Mesajımız…", Toast.LENGTH_SHORT).show();

Toast.makeText(getApplicationContext(), "Mesajımız…", Toast.LENGTH_LONG).show();

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/custom_toast_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:orientation="vertical">
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@android:drawable/ic_delete" />
        <TextView
            android:id="@+id/text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Toast YAZILI MESAJ"
            android:textColor="#FFF" />
</LinearLayout>

LayoutInflater inflater = getLayoutInflater();
                View layout = inflater.inflate(R.layout.toast_1,
                        (ViewGroup) findViewById(R.id.custom_toast_container));

                TextView text = layout.findViewById(R.id.text);
                text.setText("Bu bir Tost Mesajıdır ");
                Toast toast = new Toast(getApplicationContext());
                toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
                toast.setDuration(Toast.LENGTH_LONG);
                toast.setView(layout);
                toast.show();

package com.ossmatematik.toastresimmesaji;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    Button Btn1,Btn2;

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

        Btn1= findViewById(R.id.button1);
        Btn2= findViewById(R.id.button2);

        Btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                Toast.makeText(getApplicationContext(),"Bu bir Tost MEsajıdır",Toast.LENGTH_LONG).show();
            }
        });

        Btn2.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v)
              {
                  ImageView resim=new ImageView(getApplicationContext());
                  resim.setImageResource(R.drawable.reklam);
                  Toast toast=new Toast(getApplicationContext());
                  toast.setView(resim);
                  toast.setDuration(Toast.LENGTH_LONG);
                  toast.show();
              }
        });



    }
}

    public void sureliTOAST(String msg, int millisec) {
        Handler handler = null;
        final Toast[] toast_sureli = new Toast[1];
        for(int i = 0; i < millisec; i+=2000) {
            toast_sureli[0] = Toast.makeText(this, msg, Toast.LENGTH_SHORT);
            toast_sureli[0].show();
            if(handler == null) {
                handler = new Handler();
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        toast_sureli[0].cancel();
                    }
                }, millisec);
            }
        }
    }

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.nuri.toastresimmesaji.MainActivity">
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="NORMAL TOAST MESAJI"
        android:textSize="30sp" />
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="RESİMLİ TOAST"
        android:textSize="30sp" />
    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="RESİM ve YAZILI TOAST"
        android:textSize="30sp" />
    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="ZAMAN AYARLI TOAST(6 SANİYE)"
        android:textSize="30sp" />
</LinearLayout>

package com.nuri.toastresimmesaji;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
    Button Btn1,Btn2,Btn3,Btn4;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Btn1= findViewById(R.id.button1);
        Btn2= findViewById(R.id.button2);
        Btn3= findViewById(R.id.button3);
        Btn4= findViewById(R.id.button4);

        Btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                Toast.makeText(getApplicationContext(),"Bu bir NORMAL Tost Mesajıdır",Toast.LENGTH_LONG).show();
            }
        });

        Btn2.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v)
              {
                  ImageView resim=new ImageView(getApplicationContext());
                  resim.setImageResource(R.drawable.reklam);
                  Toast toast=new Toast(getApplicationContext());
                  toast.setView(resim); //setView yani özel toast kullanımdan kaldırıldı. Bunun yerine SnackBar kullan
                  toast.setDuration(Toast.LENGTH_LONG);
                  toast.show();
              }
        });

        Btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                String Baslik = "DENEME";
                String mesajim = "Bu bir RESİMLİ Toast MESAJI";
                gosterTOAST(mesajim,Baslik);
            }
        });

        Btn4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                sureliTOAST("Bu bir Toast MESAJI",6000);
            }
        });
    }

    public void gosterTOAST(String Baslik, String msg)
    {
        LayoutInflater inflater = getLayoutInflater();
        View layout = inflater.inflate(R.layout.toast_ekrani,
                (ViewGroup) findViewById(R.id.relativeLayout1));
        TextView baslikText = layout.findViewById(R.id.toast_baslik);
        TextView textMesaj = layout.findViewById(R.id.toast_mesaj);
        baslikText.setText(Baslik);
        textMesaj.setText(msg);
        Toast toast = new Toast(getApplicationContext());
        toast.setGravity(Gravity.BOTTOM, 0, 0);
        toast.setDuration(Toast.LENGTH_LONG);
        toast.setView(layout);  //setView yani özel toast kullanımdan kaldırıldı. Bunun yerine SnackBar kullan
        toast.show();
    }

    public void sureliTOAST(String msg, int millisec) {
        Handler handler = null;
        final Toast[] toast_sureli = new Toast[1];
        for(int i = 0; i < millisec; i+=2000) {
            toast_sureli[0] = Toast.makeText(this, msg, Toast.LENGTH_SHORT);
            toast_sureli[0].show();
            if(handler == null) {
                handler = new Handler();
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        toast_sureli[0].cancel();
                    }
                }, millisec);
            }
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/relativeLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    android:gravity="center_horizontal">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/holo_orange_dark"
        android:orientation="vertical"
        android:padding="5dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            tools:ignore="UseCompoundDrawables">

            <ImageView
                android:id="@+id/imageView1"
                android:layout_width="120dp"
                android:layout_height="60dp"
                android:layout_below="@+id/textView1"
                android:layout_margin="5dip"
                android:src="@drawable/toast_onemli_uyari"
                tools:ignore="ContentDescription,InefficientWeight,ObsoleteLayoutParam" />

            <TextView
                android:id="@+id/toast_baslik"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:padding="10dp"
                android:text=""
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:textColor="@android:color/background_dark"
                android:textSize="18sp"
                tools:ignore="HardcodedText,InefficientWeight" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="10dp">

            <TextView
                android:id="@+id/toast_mesaj"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/imageView1"
                android:layout_weight="1"
                android:gravity="center"
                android:hint="Mesaj"
                android:textColor="@color/colorPrimary"
                android:textSize="14sp"
                tools:ignore="HardcodedText,InefficientWeight,ObsoleteLayoutParam" />
        </LinearLayout>

    </LinearLayout>

</RelativeLayout>