android中的提示信息显示方法(toast应用)

时间:2021-03-14 14:58:41

android中的提示信息显示方法(toast应用)

(2011-10-17 11:02:06)

标签:

android

toast

杂谈

分类: Android

android中toast的应用:

本程序实现了用户点击按钮,桌面显示用户在程序中设定好的提示信息

package com.dou.button.activity;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity
{
 
 private  Button btn1 = null;
 private  Button btn2 = null;
 @Override
 public void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  //确定按钮的操作代码

  btn1 = (Button)findViewById(R.id.btn1);
  btn1.setOnClickListener(new OnClickListener()
  {
   
   public void onClick(View v)
   {
    Toast.makeText(MainActivity.this, "你点击了确定按钮",Toast.LENGTH_LONG ).show();
    
   }
  });
  //推出按钮的操作代码
  btn2 = (Button)findViewById(R.id.btn2);
  btn2.setOnClickListener(new OnClickListener()
  {
   
   public void onClick(View v)
   {
    Toast.makeText(MainActivity.this, "你点击了退出按钮", Toast.LENGTH_LONG).show();
    
   }
  });
 
}
}

 

注:当有多个按钮时以上代码会显得冗余,可以进行修改,修改完成后的代码为以下

 

package com.dou.button.activity;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity

{

private  Button btn1 = null;

private  Button btn2 = null;

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

//确定按钮的操作代码

btn1 = (Button)findViewById(R.id.btn1);

btn2 = (Button)findViewById(R.id.btn2);

btn1.setOnClickListener(listener);

btn2.setOnClickListener(listener);

}

private OnClickListener listener = new OnClickListener()

{

public void onClick(View v)

{

Button  btn = (Button)v;

switch(btn.getId())

{

case R.id.btn1:

Toast.makeText(MainActivity.this, "你点击了确定按钮", Toast.LENGTH_LONG).show();

break;

case R.id.btn2:

Toast.makeText(MainActivity.this, "你点击了退出按钮", Toast.LENGTH_LONG).show();

break;

}

}

};

}