Android ImageView 图片设置为透明

 

方法一：

在xml中，设置如下

< ImageView   

         android:id = "@+id/xx_id"   

         android:layout_width = "wrap_content"   

         android:layout_height = "wrap_content"   

         android:background = "@drawable/xx"  />   

< ImageView 

         android:id = "@+id/xx_id" 

         android:layout_width = "wrap_content" 

         android:layout_height = "wrap_content" 

         android:background = "@drawable/xx"  />

 

java代码中

private  ImageView image; 

image = (ImageView) findViewById(R.id.xx_id);  

image.getBackground().setAlpha( 0 );

 

方法二：

在xml中，设置如下

< ImageView   

         android:id = "@+id/xx_id"   

         android:layout_width = "wrap_content"   

         android:layout_height = "wrap_content"   

         android:src = "@drawable/xx"  />   

< ImageView 

         android:id = "@+id/xx_id" 

         android:layout_width = "wrap_content" 

         android:layout_height = "wrap_content" 

         android:src = "@drawable/xx"  />

 

java代码中

private  ImageView image;   

image = (ImageView) findViewById(R.id.xx_id);   

image.setAlpha( 0 );