import org.jf.dexlib2.dexbacked.util.FixedSizeSet; //导入依赖的package包/类
@Nonnull
@Override
public Set<? extends DexBackedClassDef> getClasses() {
    return new FixedSizeSet<DexBackedClassDef>() {
        @Nonnull
        @Override
        public DexBackedClassDef readItem(int index) {
            return new DexBackedClassDef(DexBackedDexFile.this, getClassDefItemOffset(index));
        }

        @Override
        public int size() {
            return classCount;
        }
    };
}
 

import org.jf.dexlib2.dexbacked.util.FixedSizeSet; //导入依赖的package包/类
@Nonnull
@Override
public Set<String> getInterfaces() {
    final int interfacesOffset = dexFile.readSmallUint(classDefOffset + ClassDefItem.INTERFACES_OFFSET);
    if (interfacesOffset > 0) {
        final int size = dexFile.readSmallUint(interfacesOffset);
        return new FixedSizeSet<String>() {
            @Nonnull
            @Override
            public String readItem(int index) {
                return dexFile.getType(dexFile.readUshort(interfacesOffset + 4 + (2*index)));
            }

            @Override public int size() { return size; }
        };
    }
    return ImmutableSet.of();
}
 

import org.jf.dexlib2.dexbacked.util.FixedSizeSet; //导入依赖的package包/类
@Nonnull
@Override
public Set<? extends DexBackedClassDef> getClasses() {
	return new FixedSizeSet<DexBackedClassDef>() {
        @Nonnull
        @Override
        public DexBackedClassDef readItem(int index) {
            return new DexBackedClassDef(DexBackedDexFile.this, getClassDefItemOffset(index));
        }

        @Override
        public int size() {
            return classCount;
        }
    };
}
 

import org.jf.dexlib2.dexbacked.util.FixedSizeSet; //导入依赖的package包/类
@Nonnull
@Override
public Set<String> getInterfaces() {
    final int interfacesOffset = dexFile.readSmallUint(classDefOffset + ClassDefItem.INTERFACES_OFFSET);
    if (interfacesOffset > 0) {
        final int size = dexFile.readSmallUint(interfacesOffset);
        return new FixedSizeSet<String>() {
            @Nonnull
            @Override
            public String readItem(int index) {
                return dexFile.getType(dexFile.readUshort(interfacesOffset + 4 + (2 * index)));
            }

            @Override
            public int size() {
                return size;
            }
        };
    }
    return ImmutableSet.of();
}
 

import org.jf.dexlib2.dexbacked.util.FixedSizeSet; //导入依赖的package包/类
@Override
public Set<? extends DexBackedClassDef> getClasses() {
    return new FixedSizeSet<DexBackedClassDef>() {

        @Override
        public DexBackedClassDef readItem(int index) {
            return new DexBackedClassDef(DexBackedDexFile.this, getClassDefItemOffset(index));
        }

        @Override
        public int size() {
            return classCount;
        }
    };
}
 

import org.jf.dexlib2.dexbacked.util.FixedSizeSet; //导入依赖的package包/类
@Nonnull
@Override
public Set<? extends DexBackedClassDef> getClasses() {
    return new FixedSizeSet<DexBackedClassDef>() {
        @Nonnull
        @Override
        /*
         * (non-Javadoc)
         * Modified by CwT
         * Modified this place in order to add extra class in a new dex file
         * we add extra classes in class pool make the classcount bigger than the origin
         * number, but we can not get the class body from the origin file. So, the extra
         * classes body need to be extracted from the other file
         * @see org.jf.dexlib2.dexbacked.util.FixedSizeSet#readItem(int)
         */
        public DexBackedClassDef readItem(int index) {
        	if (index < classCount) {
        		return new DexBackedClassDef(DexBackedDexFile.this, getClassDefItemOffset(index));
}else{
	DexBackedClassDef classdef = new DexBackedClassDef(addDexFile, 
			addDexFile.getClassDefItemOffset(index-classCount));
	if (filter != null) {
		return filter.rewrite(classdef);
	}
	return classdef;
}
            
        }

        @Override
        public int size() {
            return classCount + (addDexFile == null ? 0 : addDexFile.getClassCount());
        }
    };
}