Android Toast三种使用方法

例题2-15

activiy_main.xml代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <Button
        android:id="@+id/btn1"
        android:layout_width="200dip"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="默认方式"/>
    <Button
        android:id="@+id/btn2"
        android:layout_width="200dip"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="自定义方式"/>
    <Button
        android:id="@+id/btn3"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="图片方式"/>
</LinearLayout>

Mainactivity.java代码

package com.example.hellos;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.GridLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    Button b1,b2,b3;
    Toast toast;
    LinearLayout toastView;
    ImageView imageView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        b1=(Button)findViewById(R.id.btn1);
        b2=(Button)findViewById(R.id.btn2);
        b3=(Button)findViewById(R.id.btn3);
        b1.setOnClickListener(new myClick());
        b2.setOnClickListener(new myClick());
        b3.setOnClickListener(new myClick());

    }

    private class myClick implements View.OnClickListener {

        @Override
        public void onClick(View v) {
            if(v==b1){
                Toast.makeText(MainActivity.this,"Toast",Toast.LENGTH_SHORT).show();
            }else if(v==b2){
                toast=Toast.makeText(MainActivity.this,"toast",Toast.LENGTH_SHORT);
                toast.setGravity(Gravity.CENTER,0,0);
                toast.show();
            }else{
                toast=Toast.makeText(MainActivity.this,"toast",Toast.LENGTH_SHORT);
                toast.setGravity(Gravity.CENTER,0,80);
                toastView=(LinearLayout)toast.getView();
                imageView=new ImageView(MainActivity.this);
                imageView.setImageResource(R.drawable.p1);
                toastView.addView(imageView,0);
                toast.show();
            }
        }
    }
}