布局文件内容:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorGray"
    android:orientation="vertical"
    >


    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/imageToast"
        android:onClick="imageToast"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:onClick="normalToast"
        android:text="@string/normalToast"
        />

</RelativeLayout>

主程序的内容:

package com.toby.personal.testlistview;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    final private static String TAG = "Toby_Test";

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

    public void imageToast(View view) {
        Toast toast = new Toast(this);
        toast.setGravity(Gravity.CENTER, 0, 0); // toast 显示位置

        ImageView imageView = new ImageView(this);
        imageView.setImageResource(R.drawable.ic_launcher);
        imageView.setLayoutParams(new ViewGroup.LayoutParams(80, 80));
        imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);

        LinearLayout ll = new LinearLayout(this);
        ll.addView(imageView);

        TextView textView = new TextView(this);
        textView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 30);
        textView.setTextColor(Color.MAGENTA);
        textView.setText(R.string.imageToast);

        ll.addView(textView);

        toast.setView(ll);
        toast.setDuration(Toast.LENGTH_LONG);

        toast.show();
    }

    public void normalToast(View view) {
        Toast.makeText(this, R.string.normalToast, Toast.LENGTH_SHORT).show();
    }
}

示例程序运行效果:

自定义Toast

参考文献：《疯狂Android讲义（第2版）》