Android Custom Controls

Study reference: http://blog.csdn.net/hudashi/article/details/50913257

http://blog.csdn.net/gebitan505/article/details/18264091

http://blog.csdn.net/psuaije/article/details/8662266

Http://www.cnblogs.com/yc-755909659/archive/2015/02/10/4283294.html

Here is the source code: an interface is added to the code to set custom events for custom controls

MyControl. Java code:

[Java]View Plaincopy

2. Package Paj.control;
6. Import Android.content.Context;
8. Import Android.util.AttributeSet;
10. Import Android.view.View;
12. Import Android.widget.Button;
14. Import Android.widget.EditText;
16. Import Android.widget.LinearLayout;
18. Inherit LinearLayout
20. Public Class MyControl extends LinearLayout {
24. /** 
26. * Must have an interface
28. */
30. public interface icoallback{
32. public void OnClickButton (String s);
34. }
38. /** 
40. * Initialize interface variables
42. */
44. Icoallback icallback = null;
48. /** 
50. * Custom Control Custom Events
52. * @param Iback interface type
54. */
56. public void Setonclick (Icoallback iback)
58. {
60. Icallback = Iback;
62. }
66. //////////////////////////////////////////////////////////////////////////////  
68. ////////////////////////////////////////////////////////////////////////////  
72. private Context _context;
76. /** 
78. * Two parameters of the constructor (must use the two parameter constructor, because the custom control needs to use in the XML layout, contains the property)
80. * @param context invokes the object of the custom control
82. * @param attrs
84. */
86. Public mycontrol (context context, AttributeSet attrs) {
88. Super (context, attrs);
92. _context = Context;
94. //Add a custom control to the main layout
96. This.addview (Createlayout ());
98. }
102. private View Createlayout () {
104. //Create a lainearlayout layout
106. LinearLayout layout = new LinearLayout (_context);
108. Linearlayout.layoutparams params = new Linearlayout.layoutparams (Layoutparams.fill_parent, LAYOUTPARAMS.WRAP_  CONTENT);
110. Layout.setorientation (linearlayout.vertical);
112. Layout.setlayoutparams (params);
114. //Create a text edit box
116. final EditText edit = new EditText (_context);
118. Layoutparams editparams = new Layoutparams (Layoutparams.fill_parent, layoutparams.wrap_content);
120. Edit.setlayoutparams (Editparams);
122. //Create a button
124. Button button = New button (_context);
126. Layoutparams btpparams = new Layoutparams (Layoutparams.wrap_content, layoutparams.wrap_content);
128. Button.setlayoutparams (Btpparams);
130. Button.settext ("Click to get");
132. //Set button's Click event
134. Button.setonclicklistener (new Onclicklistener () {
138. @Override
140. public void OnClick (View v) {
142. //Returns the calculated value in this custom control, using the callback implementation
144. Icallback.onclickbutton (Edit.gettext (). toString ());
146. }
148. });
150. //Text edit boxes and buttons added to layout layouts
152. Layout.addview (edit);
154. Layout.addview (button);
158. return layout;
160. }
164. }

Activity_main.xml Code

[HTML]View Plaincopy

2. <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
4. <!--define your own controls--
6. xmlns:paj_control="Http://schemas.android.com/apk/res/paj.control.mycontrol"
8. android:layout_width="fill_parent"
10. android:layout_height="fill_parent"
12. android:orientation="vertical"
14. >
16. <!--custom Controls --
18. <paj.control.mycontrol android:id="@+id/mycontrol"
20. android:layout_width="fill_parent"
22. android:layout_height="wrap_content"
24. />
28. <!--Displays the value returned by the custom control-
30. <TextView android:id="@+id/test"
32. android:layout_width="match_parent"
34. android:layout_height="match_parent"
36. />
40. </linearlayout>

Mainactivity.java Code:

[Java]View Plaincopy

2. Package com.example.controlstest;
6. Import Paj.control.mycontrol;
8. Import Paj.control.mycontrol.ICoallBack;
10. Import Android.os.Bundle;
12. Import android.app.Activity;
14. Import Android.view.Menu;
16. Import Android.widget.TextView;
20. Public class Mainactivity extends Activity {
24. MyControl _mmycontrol;
26. TextView TextView;
30. @Override
32. protected void OnCreate (Bundle savedinstancestate) {
34. super.oncreate (savedinstancestate);
36. Setcontentview (R.layout.activity_main);
38. TextView = (TextView) Findviewbyid (r.id.test);
40. //Get custom Controls
42. _mmycontrol = (mycontrol) Findviewbyid (R.id.mycontrol);
44. //Implement Setonclick custom events in custom controls
46. _mmycontrol.setonclick (new Icoallback () {
50. @Override
52. public void OnClickButton (String s) {
54. Textview.settext (s); //The value passed by the custom control is displayed in the text box
56. }
58. });
60. }
62. }

Android Custom Controls