安卓toast(Android Toast)

编程之家2024-02-1491次浏览

一、Android开发_弹出小小提示框_Toast

Android开发，弹出提示框“Toast”是因为输入了下面这句操作命令：

Toast.makeText(getApplicationContext(),"你的提示内容",Toast.LENGTH_SHORT).show();

Android开发操作如下：

先导入：

import android.widget.Toast;

关键代码：

Toast.makeText(getApplicationContext(),"提示内容",Toast.LENGTH_SHORT).show();

例子：

在一个activity中，只有一个button，单击这个button弹出“单击完成”提示框。

提示：

只需在onCreante方法中添加button的单击事件

完整代码：

protected void onCreate(Bundle savedInstanceState){

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_toast1);

//设置button的单击事件

findViewById(R.id.btnToast).setOnClickListener(new View.OnClickListener(){

public void onClick(View arg0){

//弹出提示框

Toast.makeText(getApplicationContext(),"单击完成",Toast.LENGTH_SHORT).show();

}

});

}

二、android里Toast是什么意思

toast是Android系统中一种消息框类型

拓展资料

Android中的Toast是一种简易的消息提示框。

当视图显示给用户，在应用程序中显示为浮动。和Dialog不一样的是，它永远不会获得焦点，无法被点击。用户将可能是在中间键入别的东西。Toast类的思想就是尽可能不引人注意，同时还向用户显示信息，希望他们看到。而且Toast显示的时间有限，Toast会根据用户设置的显示时间后自动消失。

三、如何在Android开发中熟练使用五种Toast的特效

Toast用于向用户显示一些帮助/提示。下面我做了5中效果，来说明Toast的强大，定义一个属于你自己的Toast。

1.默认效果

代码

Toast.makeText(getApplicationContext(),"默认Toast样式",

Toast.LENGTH_SHORT).show();

2.自定义显示位置效果

代码

toast= Toast.makeText(getApplicationContext(),

"自定义位置Toast", Toast.LENGTH_LONG);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

3.带图片效果

代码

toast= Toast.makeText(getApplicationContext(),

"带图片的Toast", Toast.LENGTH_LONG);

toast.setGravity(Gravity.CENTER, 0, 0);

LinearLayout toastView=(LinearLayout) toast.getView();

ImageView imageCodeProject= new ImageView(getApplicationContext());

imageCodeProject.setImageResource(R.drawable.icon);

toastView.addView(imageCodeProject, 0);

toast.show();

4.完全自定义效果

代码

LayoutInflater inflater= getLayoutInflater();

View layout= inflater.inflate(R.layout.custom,

(ViewGroup) findViewById(R.id.llToast));

ImageView image=(ImageView) layout

.findViewById(R.id.tvImageToast);

image.setImageResource(R.drawable.icon);

TextView title=(TextView) layout.findViewById(R.id.tvTitleToast);

title.setText("Attention");

TextView text=(TextView) layout.findViewById(R.id.tvTextToast);

text.setText("完全自定义Toast");

toast= new Toast(getApplicationContext());

toast.setGravity(Gravity.RIGHT| Gravity.TOP, 12, 40);

toast.setDuration(Toast.LENGTH_LONG);

toast.setView(layout);

toast.show();

5.其他线程

代码

new Thread(new Runnable(){

public void run(){

showToast();

}

}).start();

完整代码

1.Main,java

package com.wjq.toast;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.view.View.OnClickListener;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

public class Main extends Activity implements OnClickListener{

Handler handler= new Handler();

@Override

public void onCreate(Bundle savedInstanceState){

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

findViewById(R.id.btnSimpleToast).setOnClickListener(this);

findViewById(R.id.btnSimpleToastWithCustomPosition).setOnClickListener(

this);

findViewById(R.id.btnSimpleToastWithImage).setOnClickListener(this);

findViewById(R.id.btnCustomToast).setOnClickListener(this);

findViewById(R.id.btnRunToastFromOtherThread).setOnClickListener(this);

}

public void showToast(){

handler.post(new Runnable(){

@Override

public void run(){

Toast.makeText(getApplicationContext(),"我来自其他线程！",

Toast.LENGTH_SHORT).show();

}

});

}

@Override

public void onClick(View v){

Toast toast= null;

switch(v.getId()){

case R.id.btnSimpleToast:

Toast.makeText(getApplicationContext(),"默认Toast样式",

Toast.LENGTH_SHORT).show();

break;

case R.id.btnSimpleToastWithCustomPosition:

toast= Toast.makeText(getApplicationContext(),

"自定义位置Toast", Toast.LENGTH_LONG);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

break;

case R.id.btnSimpleToastWithImage:

toast= Toast.makeText(getApplicationContext(),

"带图片的Toast", Toast.LENGTH_LONG);

toast.setGravity(Gravity.CENTER, 0, 0);

LinearLayout toastView=(LinearLayout) toast.getView();

ImageView imageCodeProject= new ImageView(getApplicationContext());

imageCodeProject.setImageResource(R.drawable.icon);

toastView.addView(imageCodeProject, 0);

toast.show();

break;

case R.id.btnCustomToast:

LayoutInflater inflater= getLayoutInflater();

View layout= inflater.inflate(R.layout.custom,

(ViewGroup) findViewById(R.id.llToast));

ImageView image=(ImageView) layout

.findViewById(R.id.tvImageToast);

image.setImageResource(R.drawable.icon);

TextView title=(TextView) layout.findViewById(R.id.tvTitleToast);

title.setText("Attention");

TextView text=(TextView) layout.findViewById(R.id.tvTextToast);

text.setText("完全自定义Toast");

toast= new Toast(getApplicationContext());

toast.setGravity(Gravity.RIGHT| Gravity.TOP, 12, 40);

toast.setDuration(Toast.LENGTH_LONG);

toast.setView(layout);

toast.show();

break;

case R.id.btnRunToastFromOtherThread:

new Thread(new Runnable(){

public void run(){

showToast();

}

}).start();

break;

}

2.main,xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=""

android:orientation="vertical" android:layout_width="fill_parent"

android:layout_height="fill_parent" android:padding="5dip" android:gravity="center">