活动中使用Toast

转载请注明出处：http://blog.csdn.net/mr_leixiansheng/article/details/53558033

1、添加按钮

2、实现按键监听

3、点击按键显示提示内容

Main:

/*
Toast提示信息用法
 */
package com.example.administrator.toast;

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

public class MainActivity extends AppCompatActivity {

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

        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this,"你点击了按钮",Toast.LENGTH_SHORT).show();   //提示
            }
        });
    }
}

xml

Kotlin写法:

package com.leixiansheng.kotlintest

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        button.setOnClickListener {
            Toast.makeText(this, "你点击了按钮",Toast.LENGTH_SHORT).show();   //提示
        }
    }
}