Differences between android Button ImageButton

BUTTON class structure:

 

From the class structure diagram, we can see that the Button is inherited from TextView, so some attributes of TextView also apply to the Button control.

ImageButton class structure:

 

ImageButton uses an icon to represent some text. It does not have the Android: text attribute. It specifies the icon position by Android: src
Android: src = "@ drawable/back_48"
Other attributes are similar to buttons.

 

 

1. How do I set the button style?
Set Through Android: background

[Java]
<Button android: id = "@ + id/myBtn1" android: text = "Button 1 sets the background style"

Android: layout_width = "fill_parent" android: layout_height = "wrap_content"

Android: background = "# fff000"/>

 

2. How to set the background icon:

[Java]
<Button android: id = "@ + id/myBtn6" android: text = "Button 6 sets the background icon"

Android: layout_width = "wrap_content" android: layout_height = "wrap_content"

Android: textStyle = "bold" android: background = "@ drawable/back_48"

/>

3. How to set the text color of the button
Android: textColor

[Java]
<Button android: id = "@ + id/myBtn2" android: text = "Button 2 font color"

Android: layout_width = "fill_parent" android: layout_height = "wrap_content"

Android: textColor = "# ff0000"/>

 
Nbsp;
4. How to set the button text style
Android: textStyle

[Java]
<Button android: id = "@ + id/myBtn3" android: text = "Button 3 font bold"

Android: layout_width = "fill_parent" android: layout_height = "wrap_content"

Android: textColor = "# ff0000" android: textStyle = "bold"/>

5. How to add a listener registration event for the button
Method 1: setOnClickListener

[Java]
MyBtn4.setOnClickListener (new OnClickListener (){



@ Override

Public void onClick (View v ){

MyBtn4.setText ("setOnclickListener event listener registration successful ");



}

});

 

Practice:
1. How to set the icon position of ImageButton
[Html]
<ImageButton android: id = "@ + id/imgBtn01" android: src = "@ drawable/forward_48"

Android: layout_width = "wrap_content" android: layout_height = "wrap_content"/>

2. How to add a listener to register an event for ImageButton?
Like Button, it can be set in two ways.
Method 1: Use onClickListener
[Java]
ImgBtn01.setOnClickListener (new OnClickListener (){



@ Override

Public void onClick (View v ){



MyTextView. setText ("ImageButton listener event ");

}

});

Method 2: Set Through XML file
[Html]
<ImageButton android: id = "@ + id/imgBtn02" android: src = "@ drawable/back_48"

Android: layout_width = "wrap_content" android: layout_height = "wrap_content"

Android: onClick = "ImageButtonXml"/>

 

1. Set transparency

[Java]
ImgBtn01.setAlpha (50); // sets the transparency.
Author: hjm4702192