Android 自定义吐司 Toast

package com.example.day03window;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private Button bu;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        bu=findViewById(R.id.bu);
//        自定义toast
        bu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast toast = Toast.makeText(MainActivity.this, "文案", Toast.LENGTH_SHORT);
                toast.setText("修改后的文案");
                toast.setDuration(Toast.LENGTH_LONG);//时间
                  toast.setGravity(Gravity.TOP,80,0);//设置位置
                  View view= LayoutInflater.from(MainActivity.this).inflate(R.layout.item,null);
                toast.setView(view);
                toast.show();
            }
        });
    }
}