Android内容提供者
一、ContentProvider
实现跨程序共享数据
创建内容提供者：extends ContentProvider类
访问数据
Uri uri =Uri.parse("uri路径")
查询数据
ContentResolver resolver = context.getContentResolver();
Cursor cur = resolver.query(Uri,projection,selection,selectionArgs,sortOrder)
while(cursor.moveToNext()){
String add = cursor.getString(0)}
cursor.close()