设置Imageview背景

Question

我正在创建一个动态Imageview。

ImageView btnSend = new ImageView (this); 

我需要把包含图像的状态的布局，这是XML：

<? xml version = "1.0" encoding = "utf-8"?> 
<selector 
     xmlns: android = "http://schemas.android.com/apk/res/android"> 
     <item 
      android: state_focused = "true" 
      android: state_pressed = "false" 
      android: drawable = "@ drawable/button_state3" /> 
     <item 
      android: state_focused = "true" 
      android: state_pressed = "true" 
      android: drawable = "@ drawable/button_state2" /> 
     <item 
      android: state_focused = "false" 
      android: state_pressed = "true" 
      android: drawable = "@ drawable/button_state2" /> 
     <item 
      android: drawable = "@ drawable/button_state1" /> 
</ selector> 

我setBackgroundResource属性测试，但不起作用。

如何将此布局分配给Imageview？

在此先感谢。

Answer 1

你在这个XML中创建了什么（在@之后删除空格）是StateListDrawable而不是你提到的Layout。 因此，请使用ImageView.setImageResource(R.drawable.mydrawable)进行设置。

Answer 2

这是工作代码...

ImageView btnEliminar = new ImageView (this); 

StateListDrawable drawable = new StateListDrawable(); 

Drawable normal = getResources().getDrawable(R.drawable.image_normal); 
Drawable selected = getResources().getDrawable(R.drawable.image_selected); 
Drawable pressed = getResources().getDrawable(R.drawable.image_pressed); 

drawable.addState(new int[] { android.R.attr.state_pressed}, pressed); 
drawable.addState(new int[] { android.R.attr.state_focused}, selected); 
drawable.addState(new int[] { android.R.attr.state_enabled}, normal); 

btnEliminar.setImageDrawable(drawable);