Java JFrame change Icon

October 10, 2016October 10, 2016 totosugito Java

I have learn about GUI programming using java this week. I have created a simple window (using JFrame) and get the default icon in titlebar is a default java icon. But, I dont like this default icon image and want to change with another image.

This is a complete code how to change JFrame icon image

package jframechangeicon;

import java.awt.Dimension;
import java.awt.Toolkit;

/**
 *
 * @author toto
 */
public class JframeChangeIcon extends javax.swing.JFrame
{
    public JframeChangeIcon()
    {
        setTitle("MainWindow");
        //change java image
        setIconImage(Toolkit.getDefaultToolkit().getImage(getClass().getResource("/jframeChangeicon/image/appicon.png")));
    }
    
    public static void main(String[] args)
    {
        JframeChangeIcon  frame = new JframeChangeIcon();
        frame.setSize(new Dimension(500, 300));
        frame.setVisible(true);
    }    
}

package jframechangeicon;

import java.awt.Dimension;

import java.awt.Toolkit;

/**

* @author toto

public class JframeChangeIcon extends javax.swing.JFrame

{

public JframeChangeIcon()

{

setTitle("MainWindow");

//change java image

setIconImage(Toolkit.getDefaultToolkit().getImage(getClass().getResource("/jframeChangeicon/image/appicon.png")));

}

public static void main(String[] args)

{

JframeChangeIcon frame = new JframeChangeIcon();

frame.setSize(new Dimension(500, 300));

frame.setVisible(true);

}

This is the Program Window result after JFrame change the icon

Download the complete source code how JFrame change the icon below.

Source code : jframeChangeIcon.zip

Manifest merger failed Attribute application icon

September 21, 2016September 21, 2016 totosugito Android

I have created code in android without problem. But, when I added new external library, I get error message like this :

Error:Execution failed for task ':mie:processDebugManifest'.
> Manifest merger failed : Attribute application@icon value=(@mipmap/ic_launcher) from AndroidManifest.xml:7:9-43
	is also present at [com.pnikosis:materialish-progress:1.0] AndroidManifest.xml:13:9-45 value=(@drawable/ic_launcher).
	Suggestion: add 'tools:replace="android:icon"' to <application> element at AndroidManifest.xml:5:5-47:19 to override.

Error:Execution failed for task ':mie:processDebugManifest'.

> Manifest merger failed : Attribute application@icon value=(@mipmap/ic_launcher) from AndroidManifest.xml:7:9-43

is also present at [com.pnikosis:materialish-progress:1.0] AndroidManifest.xml:13:9-45 value=(@drawable/ic_launcher).

Suggestion: add 'tools:replace="android:icon"' to <application> element at AndroidManifest.xml:5:5-47:19 to override.

This error related with my external library have icon setting and conflict with my icon program. We can solve this problem with editing AndroidManifest.xml file. My original contents of this file like this :

<?xml version="1.0" encoding="utf-8"?>
<manifest package="smartfamily.mie"
          xmlns:android="http://schemas.android.com/apk/res/android">

    <application
        android:allowBackup="true"
        ...
        ...
        android:theme="@style/AppTheme">
        ...

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

<manifest package="smartfamily.mie"

xmlns:android="http://schemas.android.com/apk/res/android">

<application

android:allowBackup="true"

...

android:theme="@style/AppTheme">

...

after modified :

<?xml version="1.0" encoding="utf-8"?>
<manifest package="smartfamily.mie"
          xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        ...
        ...
        android:theme="@style/AppTheme"
        tools:replace="android:icon,android:theme">
        ...

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

<manifest package="smartfamily.mie"

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools">

<application

android:allowBackup="true"

...

android:theme="@style/AppTheme"

tools:replace="android:icon,android:theme">

...

This method solve my problem related with Manifest merger failed Attribute application icon.

Button Android text automatic forced to All Caps

May 16, 2016May 16, 2016 totosugito Android, Java

I have created a simple button in Android and set a Text to this button. But, I get result all text in my Button become All Capitals.

Solve this problem (Button Android text automatic forced to All Caps) is very simple. We can set “setTransformationMethod” to ignore automatic convert our text in Android Button become all Capitals. Add this code below your button :

mButton.setTransformationMethod(null);

1	mButton.setTransformationMethod(null);

Hope this tips can help to prevent our text in Android Button become All Capitals.

Source :

http://stackoverflow.com/questions/26958909/why-is-my-button-text-forced-to-all-caps-on-lollipop

Android show alert window with button

April 28, 2016April 28, 2016 totosugito Android, Java Android alert window subroutine, create a simple alert window with a button, create alert window in Android, create Android alert window using AlertDialog

I am learn about android programming in my free time. I am planned to create a simple alert window with a button. We can use AlertDialog class to create android alert window in Android. The sample output using this class as like picture below.

I have created a simple function how to create Android alert window using AlertDialog class. Please check this subroutine :

private void showAlertOk(String strtitle, String strtext, String strbutton)
{
	AlertDialog.Builder builder = new AlertDialog.Builder(formQuestions.this);
	builder.setTitle(strtitle);
	builder.setMessage(strtext);
	builder.setPositiveButton(strbutton, new DialogInterface.OnClickListener()
	{
		public void onClick(DialogInterface dialog, int which)
		{
			//add our code in here
		}
	});
	builder.show();
}

private void showAlertOk(String strtitle, String strtext, String strbutton)

{

AlertDialog.Builder builder = new AlertDialog.Builder(formQuestions.this);

builder.setTitle(strtitle);

builder.setMessage(strtext);

builder.setPositiveButton(strbutton, new DialogInterface.OnClickListener()

{

public void onClick(DialogInterface dialog, int which)

{

//add our code in here

}

});

builder.show();

}

We can give parameter to this Android alert window subroutine to give same result like picture above using command :

showAlertOk("Information", "Please select the right answer", "Close")

1	showAlertOk("Information", "Please select the right answer", "Close")

I hope this simple subroutine can give you more explaining about how to create alert window in Android.

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Java JFrame change Icon

Manifest merger failed Attribute application icon

Button Android text automatic forced to All Caps

Android show alert window with button