Using Toast Widgets in Android

by vikrant » Fri Jun 12, 2009 7:23 am

Hi I tried with Toast in Android..Here is a small tutorial
Package:- android.widget
Documentation:- http://developer.android.com/reference/ ... Toast.html
A Toast is a view containig a quick little message for the user. The Toast class helps you to create and show these messages.
Example:- to display messages like -"your settings have been saved"
Code Snippets:-

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1. package com.vikrant.ToastExample;
2.  
3. import android.app.Activity;
4. import android.widget.Button;
5. import android.os.Bundle;
6. import android.view.View;
7. import android.widget.Toast;
8.  
9. /**
10.  * When you push the button on this Activity, it creates a Toast object and using the Toast method.
11.  *Toast#makeText(android.content.Context,java.lang.CharSequence,int)
12.  *Toast#LENGTH_SHORT
13.  *Toast#LENGTH_LONG
14.  */
15. public class ToastExample extends Activity
16. {
17.     @Override
18.     protected void onCreate(Bundle savedInstanceState)
19.     {
20.         super.onCreate(savedInstanceState);
21.         setContentView(R.layout.main);
22.         Button button;
23.  
24.         // short notification
25.         button = (Button) findViewById(R.id.button_short);
26.         button.setOnClickListener(new Button.OnClickListener()
27.         {
28.             public void onClick(View v)
29.             {
30.                 // Note that we create the Toast object and call the show() method
31.                 // on it all on one line.  Most uses look like this, but there
32.                 // are other methods on Toast that you can call to configure how
33.                 // it appears.
34.                 //
35.                
36.                 Toast t = new Toast(ToastExample.this);
37.                 t.makeText(ToastExample.this, "Volume set to Max", Toast.LENGTH_SHORT);
38.                 t.show();
39.             }
40.         });
41.  
42.         // long notification
43.         // The only difference here is that the notification stays up longer.
44.         // You might want to use this if there is more text that they're going to read.
45.         button = (Button) findViewById(R.id.button_long);
46.         button.setOnClickListener(new Button.OnClickListener()
47.         {
48.             public void onClick(View v)
49.             {
50.                 Toast.makeText(ToastExample.this," Your settings have been saved",Toast.LENGTH_LONG).show();
51.             }
52.         });
53.     }
54. }
55.  
56.  

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1. <?xml version="1.0" encoding="utf-8"?>
2. <AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
3.    android:orientation="vertical"
4.    android:layout_width="fill_parent"
5.    android:layout_height="fill_parent" >
6. <TextView  android:layout_width="fill_parent"
7.    android:layout_height="wrap_content"
8.    android:text="@string/hello"  />
9. <Button  android:id="@+id/button_short"
10.  android:layout_width="wrap_content"
11.  android:layout_height="wrap_content"
12.  android:text="Volume Set"
13.  android:layout_x="50px"
14.  android:layout_y="200px"  />
15.  <Button  android:id="@+id/button_long"
16.  android:text="Save Settings"
17.  android:layout_width="wrap_content"
18.  android:layout_height="wrap_content"
19.  android:layout_x="150px"
20.  android:layout_y="200px" />  
21. </AbsoluteLayout>

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Useful Methods:-
void cancel()
int getDuration()
int getGravity();
static Toast makeText(Context c, CharSequnce Text_to_be_shown,int duration)
void show();
void setDuration();

Attachments

Toast2.JPG (18.83 KiB) Viewed 28028 times

Screen Shots

Toast1.JPG (17.3 KiB) Viewed 28028 times

by Wiebbe » Thu Jun 18, 2009 10:54 am

Thanks for the code, but something didnt work for me.

The method Maketext is a static method, and it returns a new Toast object.

So when i did it like this:

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1.  
2. Toast t;
3.  
4. t = Toast.makeText(onCreate.this, "Volume set to Max", Toast.LENGTH_SHORT);
5.  
6. t.show();
7.  
8.  

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it worked

Thanks

by vikrant » Thu Jun 18, 2009 2:19 pm

Hi
Thanks for correcting the code...
Instead of :-

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Using java Syntax Highlighting

1.  
2.  
3.  Toast t = new Toast(ToastExample.this);
4.  
5.  t.makeText(ToastExample.this, "Volume set to Max", Toast.LENGTH_SHORT);
6.  
7.  t.show();

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It should have been:-

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Using java Syntax Highlighting

1.  
2.  Toast t
3.  
4.  t.makeText(ToastExample.this, "Volume set to Max", Toast.LENGTH_SHORT);
5.  
6.  t.show();

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wanted to modify it, but it slipped ...

thnx again

by WarrenFaith » Fri Jun 19, 2009 8:26 am

Thank you for your tutorial!

One last change and its perfect

Please check your warnings for your makeText() method.
You should access a static method always in a static way:
Change

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Using java Syntax Highlighting

1. Toast t
2.  
3.  t.makeText(ToastExample.this, "Volume set to Max", Toast.LENGTH_SHORT);
4.  
5.  t.show();

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to

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Using java Syntax Highlighting

1. Toast t = Toast.makeText(ToastExample.this, "Volume set to Max", Toast.LENGTH_SHORT);
2.  
3.  t.show();
4.  
5. // or simplier:
6.  
7. Toast.makeText(ToastExample.this, "Volume set to Max", Toast.LENGTH_SHORT).show();

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Re: Using Toast Widgets in Android

by endhck » Fri Jul 16, 2010 12:42 pm

Re: Using Toast Widgets in Android

by endhck » Fri Jul 16, 2010 12:49 pm