/Users/alamps/AndroidStudioProjects/demo16Toast/demo16Toast/src/main/res/layout/activity_main.xml

<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:orientation="vertical"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    android:paddingBottom="@dimen/activity_vertical_margin"

    tools:context=".MainActivity">

    <Button android:id="@+id/_shortShow"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Short Toast" />

    <Button android:id="@+id/_longShow"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Long Toast" />

    <Button android:id="@+id/_customShow"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="customShow Toast" />

</LinearLayout>

================

/Users/alamps/AndroidStudioProjects/demo16Toast/demo16Toast/src/main/java/com/example/demo16toast/MainActivity.java

package com.example.demo16toast;

import android.os.Bundle;

import android.app.Activity;

import android.view.Gravity;

import android.view.Menu;

import android.view.View;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.Toast;

public class MainActivity extends Activity {

    private Button shortShow;

    private Button longShow;

    private Button customShow;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        this.shortShow = (Button)super.findViewById(R.id._shortShow);

        this.longShow = (Button)super.findViewById(R.id._longShow);

        this.customShow = (Button)super.findViewById(R.id._customShow);

        this.shortShow.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Toast.makeText(MainActivity.this,"Short Toast show ",Toast.LENGTH_SHORT).show();

            }

        });

        this.longShow.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Toast.makeText(MainActivity.this,"Long Toast Show ",Toast.LENGTH_LONG).show();

            }

        });

        this.customShow.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

             Toast customToast= Toast.makeText(MainActivity.this,"Custom Toast show ",Toast.LENGTH_LONG);

            customToast.setGravity(Gravity.CENTER,,);

            LinearLayout customToastView =(LinearLayout)customToast.getView();

            ImageView customImageView= new ImageView(MainActivity.this);

            customImageView.setImageResource(R.drawable.ic_launcher);

            customToastView.addView(customImageView,);//在文字上方填加图片View

            customToast.show();

            }

        });

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}