Android study Note 6: Use Framelayout to achieve neon Effect

Framelayout is the frame layout, which can be used to overlay several controls. You can use Framelayout and textview to achieve a simple neon effect.

Package org. crazyit. framelayout;
 
Import java. util. Timer;
Import java. util. TimerTask;
 
Import android. app. Activity;
Import android. OS. Bundle;
Import android. OS. Handler;
Import android. OS. Message;
Import android. widget. TextView;
 
Public class FrameLayoutTest extends Activity
{
Private int currentColor = 0;
// Define a color array
Final int [] colors = new int []
{
R. color. color7,
R. color. color6,
R. color. color5,
R. color. color4,
R. color. color3,
R. color. color2,
R. color. color1,
};
// Color display array, with the view as the TextView Control
Final int [] names = new int []
{
R. id. View01,
R. id. View02,
R. id. View03,
R. id. View04,
R. id. View05,
R. id. View06,
R. id. View07
};
TextView [] views = new TextView [7];
@ Override
Public void onCreate (Bundle savedInstanceState)
{
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );
For (int I = 0; I <7; I ++)
{
Views [I] = (TextView) findViewById (names [I]);
}
// Use Handler for Message Processing
Final Handler handler = new Handler ()
{
@ Override
Public void handleMessage (Message msg)
{
// Indicates that the message is sent by the program.
If (msg. what = 0x1122)
{
// Change the background color of the seven textviews in sequence
For (int I = 0; I <7-currentColor; I ++)
{
Views [I]. setBackgroundResource (colors [I + currentColor]); // you can change the background color.
}
For (int I = 7-currentColor, j = 0; I <7; I ++, j ++)
{
Views [I]. setBackgroundResource (colors [j]);
}
}
Super. handleMessage (msg );
}
};
// Define a thread to change the currentColor variable value periodically
New Timer (). schedule (new TimerTask ()
{
@ Override
Public void run ()
{
CurrentColor ++;
If (currentColor> = 6)
{
CurrentColor = 0;
}
// Send a message to notify the system to change the background color of the seven TextView Components
Message m = new Message ();
// Define an identifier for the message
M. what = 0x1122;
Handler. sendMessage (m );
}
}, 0,100); // the cycle is 100 milliseconds
}
}
Package org. crazyit. framelayout;

Import java. util. Timer;
Import java. util. TimerTask;

Import android. app. Activity;
Import android. OS. Bundle;
Import android. OS. Handler;
Import android. OS. Message;
Import android. widget. TextView;

Public class FrameLayoutTest extends Activity
{
Private int currentColor = 0;
// Define a color array
Final int [] colors = new int []
{
R. color. color7,
R. color. color6,
R. color. color5,
R. color. color4,
R. color. color3,
R. color. color2,
R. color. color1,
};
// Color display array, with the view as the TextView Control
Final int [] names = new int []
{
R. id. View01,
R. id. View02,
R. id. View03,
R. id. View04,
R. id. View05,
R. id. View06,
R. id. View07
};
TextView [] views = new TextView [7];
@ Override
Public void onCreate (Bundle savedInstanceState)
{
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );
For (int I = 0; I <7; I ++)
{
Views [I] = (TextView) findViewById (names [I]);
}
// Use Handler for Message Processing
Final Handler handler = new Handler ()
{
@ Override
Public void handleMessage (Message msg)
{
// Indicates that the message is sent by the program.
If (msg. what = 0x1122)
{
// Change the background color of the seven textviews in sequence
For (int I = 0; I <7-currentColor; I ++)
{
Views [I]. setBackgroundResource (colors [I + currentColor]); // you can change the background color.
}
For (int I = 7-currentColor, j = 0; I <7; I ++, j ++)
{
Views [I]. setBackgroundResource (colors [j]);
}
}
Super. handleMessage (msg );
}
};
// Define a thread to change the currentColor variable value periodically
New Timer (). schedule (new TimerTask ()
{
@ Override
Public void run ()
{
CurrentColor ++;
If (currentColor> = 6)
{
CurrentColor = 0;
}
// Send a message to notify the system to change the background color of the seven TextView Components
Message m = new Message ();
// Define an identifier for the message
M. what = 0x1122;
Handler. sendMessage (m );
}
}, 0,100); // the cycle is 100 milliseconds
}
}
Corresponding XML file

<? Xml version = "1.0" encoding = "UTF-8"?>
<FrameLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: orientation = "vertical"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
>
<! -- Define 7 textviews in sequence, and the first defined TextView is located at the underlying layer
The defined TextView is located at the upper layer -->
<TextView android: id = "@ + id/View01"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: width = "210px"
Android: height = "50px"
Android: background = "# ff0000"
/>
<TextView android: id = "@ + id/View02"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: width = "180px"
Android: height = "50px"
Android: background = "# dd0000"
/>
<TextView android: id = "@ + id/View03"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: width = "150px"
Android: height = "50px"
Android: background = "# bb0000"
/>
<TextView android: id = "@ + id/View04"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: width = "120px"
Android: height = "50px"
Android: background = "#990000"
/>
<TextView android: id = "@ + id/View05"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: width = "90px"
Android: height = "50px"
Android: background = "#770000"
/>
<TextView android: id = "@ + id/View06"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: width = "60px"
Android: height = "50px"
Android: background = "#550000"
/>
<TextView android: id = "@ + id/View07"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: width = "30px"
Android: height = "50px"
Android: background = "#330000"
/>
</FrameLayout>

From the column hn307165411