学步园

1.前台控制selectot

mybutton_background.xml

<?xml version="1.0" encoding="utf-8"?>
<selector android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:state_pressed="false"
android:drawable="@drawable/button_background_focus" />
<item android:state_focused="true" android:state_pressed="true"
android:drawable="@drawable/button_background_pressed" />
<item android:state_focused="false" android:state_pressed="true"
android:drawable="@drawable/button_background_pressed" />
<item drawable="@drawable/button_background_normal">
</selector>
android:background="@drawable/mybutton_background"

2.后台重写Button

public class MyButton extends Button {

 private Drawable defDrawable = null;
 private Drawable preDrawable = null;
 public MyButton(Context context,Drawable defDrawable,Drawable preDrawable) {
  super(context);
  // TODO Auto-generated constructor stub
  this.defDrawable = defDrawable;
  this.preDrawable = preDrawable;
 }
 
 public MyButton(Context context) {
  super(context);
  // TODO Auto-generated constructor stub
 }
 
 public MyButton(Context context, AttributeSet attrs){
  super(context, attrs);
  // TODO Auto-generated constructor stub
 }
 
 @Override
 protected void onDraw(Canvas canvas) {
 //sets the button image based on whether the button in its pressed state
 //setBackgroundDrawable(getResources().getDrawable(isPressed()?R.drawable.btn_on : R.drawable.btn_off));
 if(isPressed() && preDrawable != null)
 {
  setBackgroundDrawable(preDrawable);
  setTextColor(Color.BLACK);
 }
 if(isPressed() && preDrawable == null)
 {
  //setBackgroundColor(Color.BLUE);
  setTextColor(Color.BLACK);
 }
 if(!isPressed() && defDrawable != null)
 {
  setBackgroundDrawable(defDrawable);
  setTextColor(Color.BLACK);
 }
 if(!isPressed() && defDrawable == null)
 {
  //setBackgroundColor(Color.WHITE);
  setTextColor(Color.BLACK);
 }
 super.onDraw(canvas);
 }

}

/*****************************************************调用后台重写Button2**********************************************************/

 MyButton buttonVo = new MyButton(context,null,null);
 buttonVo.setId(201);
 buttonVo.setText("首页");