Reflection Java reflection assignment of rights and static properties

When a class is private property, you need to be

 fieldName.setAccessible(true);

When a property is a static property class time, directly

 itemListField.set(null, arrayList);

Examples:

// Get the class 
Class mediaItemClazz = Class.forName ( "io.rong.imkit.plugin.image.PictureSelectorActivity $ MediaItem" ); 
// Get attributes 
Field, uriField = mediaItemClazz.getDeclaredField ( "uri" ); 
// set access permissions 
uriField .setAccessible ( to true ); 
Field, mediaTypeField = mediaItemClazz.getDeclaredField ( "mediaType" ); 
mediaTypeField.setAccessible ( to true ); 
// instantiate an object 
Object Item = mediaItemClazz.newInstance (); 
// set properties 
uriField.set (Item, the this .mTakePictureUri.getPath ()); 
mediaTypeField.set (Item, . 1 ); 

Class holderClazz= Class.forName("io.rong.imkit.plugin.image.PictureSelectorActivity$PicItemHolder");
// 获取静态属性
Field itemListField = holderClazz.getDeclaredField("itemList");
itemListField.setAccessible(true);
Field itemSelectedListField = holderClazz.getDeclaredField("itemSelectedList");
itemSelectedListField.setAccessible(true);
ArrayList arrayList = new ArrayList();
arrayList.add(item);
// 给静态属性赋值
itemListField.set(null, arrayList);
itemSelectedListField.set(null, null);