blocks|key|356836|text|试试这个..。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|356837|+++Reflections+reflections+=+new+Reflections("my.project.prefix");

+++Set<Class<?+extends+Object>>+allClasses+
++++++++++++++++++++++++=+reflections.getSubTypesOf(Object.class);|code-block|syntax|javascript|356838|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try this..

<pre><code> Reflections reflections = new Reflections("my.project.prefix");

 Set&lt;Class&lt;? extends Object&gt;&gt; allClasses 
 = reflections.getSubTypesOf(Object.class);
</code></pre>

blocks|key|138975|text|使用DexFile列出apk中的所有类：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|138976|++++try+{
++++++++DexFile+df+=+new+DexFile(context.getPackageCodePath());
++++++++for+(Enumeration<String>+iter+=+df.entries();+iter.hasMoreElements();)+{
++++++++++++String+s+=+iter.nextElement();
++++++++}
++++}+catch+(IOException+e)+{
++++++++e.printStackTrace();
++++}|code-block|syntax|javascript|138977|剩下的就是使用regexp或其他方法来过滤掉您想要的类。|138978|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Using DexFile to list all classes in your apk:

<pre><code> try {
 DexFile df = new DexFile(context.getPackageCodePath());
 for (Enumeration&lt;String&gt; iter = df.entries(); iter.hasMoreElements();) {
 String s = iter.nextElement();
 }
 } catch (IOException e) {
 e.printStackTrace();
 }
</code></pre>

the rest is using regexp or something else to filter out your desired class.

blocks|key|356916|text|这张图片取自http://mindtherobot.com/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|356917|代码示例|356918|假设我们有一个名为Foo的注释和几个用它装饰的类：|356919|@Retention(RetentionPolicy.RUNTIME)
public+@interface+Foo+{
++String+value();
}

@Foo("person")
public+class+Person+{

}

@Foo("order")
public+class+Order+{

}|code-block|syntax|javascript|356920|这是一个简单的类，它在运行时遍历应用程序中的所有类，查找那些标记为@Foo的类，并获取注解的值。不要将此代码复制并粘贴到您的应用程序中-它有很多需要修复和添加的内容，如下面的代码所述。|356921|public+class+ClasspathScanner+{
++private+static+final+String+TAG+=+ClasspathScanner.class.getSimpleName();

++private+static+Field+dexField;

++static+{
++++try+{
++++++dexField+=+PathClassLoader.class.getDeclaredField("mDexs");
++++++dexField.setAccessible(true);
++++}+catch+(Exception+e)+{
++++++//+TODO+(1):+handle+this+case+gracefully+-+nobody+promised+that+this+field+will+always+be+there
++++++Log.e(TAG,+"Failed+to+get+mDexs+field");
++++}+
++}

++public+void+run()+{
++++try+{
++++++//+TODO+(2):+check+here+-+in+theory,+the+class+loader+is+not+required+to+be+a+PathClassLoader
++++++PathClassLoader+classLoader+=+(PathClassLoader)+Thread.currentThread().getContextClassLoader();

++++++DexFile[]+dexs+=+(DexFile[])+dexField.get(classLoader);
++++++for+(DexFile+dex+:+dexs)+{
++++++++Enumeration<String>+entries+=+dex.entries();
++++++++while+(entries.hasMoreElements())+{
++++++++++//+(3)+Each+entry+is+a+class+name,+like+"foo.bar.MyClass"
++++++++++String+entry+=+entries.nextElement();
++++++++++Log.d(TAG,+"Entry:+"+%2B+entry);

++++++++++//+(4)+Load+the+class
++++++++++Class<?>+entryClass+=+dex.loadClass(entry,+classLoader);
++++++++++if+(entryClass+!=+null)+{
++++++++++++Foo+annotation+=+entryClass.getAnnotation(Foo.class);
++++++++++++if+(annotation+!=+null)+{
++++++++++++++Log.d(TAG,+entry+%2B+":+"+%2B+annotation.value());
++++++++++++}
++++++++++}
++++++++}
++++++}
++++}+catch+(Exception+e)+{
++++++//+TODO+(5):+more+precise+error+handling
++++++Log.e(TAG,+"Error",+e);
++++}
++}
}|356922|entityMap|0|LINK|mutability|MUTABLE|url|http://mindtherobot.com/blog/737/android-hacks-scan-android-classpath/^0|6|O|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|16|8|@]|9|@]|C|$K|L]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

This is taken from <a href="http://mindtherobot.com/blog/737/android-hacks-scan-android-classpath/" rel="nofollow">http://mindtherobot.com/</a>

Code example

Say we have an annotation called Foo and few classes decorated with it:

<pre><code>@Retention(RetentionPolicy.RUNTIME)
public @interface Foo {
 String value();
}

@Foo("person")
public class Person {

}

@Foo("order")
public class Order {

}
</code></pre>

Here’s a simple class that goes over all classes in your app in runtime, finds those marked with @Foo and get the value of the annotation. Do not copy and paste this code into your app – it has a lot to be fixed and added, as described below the code.

<pre><code>public class ClasspathScanner {
 private static final String TAG = ClasspathScanner.class.getSimpleName();

 private static Field dexField;

 static {
 try {
 dexField = PathClassLoader.class.getDeclaredField("mDexs");
 dexField.setAccessible(true);
 } catch (Exception e) {
 // TODO (1): handle this case gracefully - nobody promised that this field will always be there
 Log.e(TAG, "Failed to get mDexs field");
 } 
 }

 public void run() {
 try {
 // TODO (2): check here - in theory, the class loader is not required to be a PathClassLoader
 PathClassLoader classLoader = (PathClassLoader) Thread.currentThread().getContextClassLoader();

 DexFile[] dexs = (DexFile[]) dexField.get(classLoader);
 for (DexFile dex : dexs) {
 Enumeration&lt;String&gt; entries = dex.entries();
 while (entries.hasMoreElements()) {
 // (3) Each entry is a class name, like "foo.bar.MyClass"
 String entry = entries.nextElement();
 Log.d(TAG, "Entry: " + entry);

 // (4) Load the class
 Class&lt;?&gt; entryClass = dex.loadClass(entry, classLoader);
 if (entryClass != null) {
 Foo annotation = entryClass.getAnnotation(Foo.class);
 if (annotation != null) {
 Log.d(TAG, entry + ": " + annotation.value());
 }
 }
 }
 }
 } catch (Exception e) {
 // TODO (5): more precise error handling
 Log.e(TAG, "Error", e);
 }
 }
}
</code></pre>

blocks|key|356945|text|实际上我找到了解决方案。感谢你的tao回复。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|356946|private+String[]+getClassesOfPackage(String+packageName)+{
++++ArrayList<String>+classes+=+new+ArrayList<String>();
++++try+{
++++++++String+packageCodePath+=+getPackageCodePath();
++++++++DexFile+df+=+new+DexFile(packageCodePath);
++++++++for+(Enumeration<String>+iter+=+df.entries();+iter.hasMoreElements();+)+{
++++++++++++String+className+=+iter.nextElement();
++++++++++++if+(className.contains(packageName))+{
++++++++++++++++classes.add(className.substring(className.lastIndexOf(".")+%2B+1,+className.length()));
++++++++++++}
++++++++}
++++}+catch+(IOException+e)+{
++++++++e.printStackTrace();
++++}

++++return+classes.toArray(new+String[classes.size()]);
}|code-block|syntax|javascript|356947|在Android+5.0+Lolipop上测试|356948|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/15892032/2956344^0|G|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Actually i found solution. Thanks for <a href="https://stackoverflow.com/a/15892032/2956344">tao</a> reply.

<pre><code>private String[] getClassesOfPackage(String packageName) {
 ArrayList&lt;String&gt; classes = new ArrayList&lt;String&gt;();
 try {
 String packageCodePath = getPackageCodePath();
 DexFile df = new DexFile(packageCodePath);
 for (Enumeration&lt;String&gt; iter = df.entries(); iter.hasMoreElements(); ) {
 String className = iter.nextElement();
 if (className.contains(packageName)) {
 classes.add(className.substring(className.lastIndexOf(".") + 1, className.length()));
 }
 }
 } catch (IOException e) {
 e.printStackTrace();
 }

 return classes.toArray(new String[classes.size()]);
}
</code></pre>

Tested on Android 5.0 Lolipop

blocks|key|356981|text|这是一个解决方案，它不仅为您提供类名，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|356982|还包括Class<?>对象。|offset|length|style|CODE|356983|虽然PathClassLoader.class.getDeclaredField("mDexs")经常失败，|356984|new+DexFile(getContext().getPackageCodePath())似乎要稳定得多。|356985|public+abstract+class+ClassScanner+{

++++private+static+final+String+TAG+=+"ClassScanner";+
++++private+Context+mContext;

++++public+ClassScanner(Context+context)+{
++++++++mContext+=+context;
++++}

++++public+Context+getContext()+{
++++++++return+mContext;
++++}

++++void+scan()+throws+IOException,+ClassNotFoundException,+NoSuchMethodException+{
++++++++long+timeBegin+=+System.currentTimeMillis();

++++++++PathClassLoader+classLoader+=+(PathClassLoader)+getContext().getClassLoader();
++++++++//PathClassLoader+classLoader+=+(PathClassLoader)+Thread.currentThread().getContextClassLoader();//This+also+works+good
++++++++DexFile+dexFile+=+new+DexFile(getContext().getPackageCodePath());
++++++++Enumeration<String>+classNames+=+dexFile.entries();
++++++++while+(classNames.hasMoreElements())+{
++++++++++++String+className+=+classNames.nextElement();
++++++++++++if+(isTargetClassName(className))+{
++++++++++++++++//Class<?>+aClass+=+Class.forName(className);//java.lang.ExceptionInInitializerError
++++++++++++++++//Class<?>+aClass+=+Class.forName(className,+false,+classLoader);//tested+on+魅蓝Note(M463C)_Android4.4.4+and+Mi2s_Android5.1.1
++++++++++++++++Class<?>+aClass+=+classLoader.loadClass(className);//tested+on+魅蓝Note(M463C)_Android4.4.4+and+Mi2s_Android5.1.1
++++++++++++++++if+(isTargetClass(aClass))+{
++++++++++++++++++++onScanResult(aClass);
++++++++++++++++}
++++++++++++}
++++++++}

++++++++long+timeEnd+=+System.currentTimeMillis();
++++++++long+timeElapsed+=+timeEnd+-+timeBegin;
++++++++Log.d(TAG,+"scan()+cost+"+%2B+timeElapsed+%2B+"ms");
++++}

++++protected+abstract+boolean+isTargetClassName(String+className);

++++protected+abstract+boolean+isTargetClass(Class+clazz);

++++protected+abstract+void+onScanResult(Class+clazz);
}|code-block|syntax|javascript|356986|下面是一个如何使用的示例：|356987|new+ClassScanner(context)+{

++++@Override
++++protected+boolean+isTargetClassName(String+className)+{
++++++++return+className.startsWith(getContext().getPackageName())//I+want+classes+under+my+package
++++++++++++++++&&+!className.contains("$");//I+don't+need+none-static+inner+classes
++++}

++++@Override
++++protected+boolean+isTargetClass(Class+clazz)+{
++++++++return+AbsFactory.class.isAssignableFrom(clazz)//I+want+subclasses+of+AbsFactory
++++++++++++++++&&+!Modifier.isAbstract(clazz.getModifiers());//I+don't+want+abstract+classes
++++}

++++@Override
++++protected+void+onScanResult(Class+clazz)+{
++++++++Constructor+constructor+=+null;
++++++++try+{
++++++++++++constructor+=+clazz.getDeclaredConstructor();
++++++++++++constructor.setAccessible(true);
++++++++++++constructor.newInstance();
++++++++}+catch+(NoSuchMethodException+e)+{
++++++++++++e.printStackTrace();
++++++++}+catch+(InstantiationException+e)+{
++++++++++++e.printStackTrace();
++++++++}+catch+(IllegalAccessException+e)+{
++++++++++++e.printStackTrace();
++++++++}+catch+(InvocationTargetException+e)+{
++++++++++++e.printStackTrace();
++++++++}
++++}

}.scan();|356988|entityMap^0|0|3|8|0|2|1B|0|0|1A|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|13|8|@$D|14|E|15|F|G]]|9|@]|A|$]]|$1|L|3|M|5|N|7|16|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|17|8|@]|9|@]|A|$]]|$1|S|3|T|5|N|7|18|8|@]|9|@]|A|$O|P]]|$1|U|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|V|$]]

Here's a solution that bring you not only the class name, 
but also the <code>Class&lt;?&gt;</code> object.

And while <code>PathClassLoader.class.getDeclaredField("mDexs")</code> fails frequently, 
<code>new DexFile(getContext().getPackageCodePath())</code> seems much more stable.

<pre><code>public abstract class ClassScanner {

 private static final String TAG = "ClassScanner"; 
 private Context mContext;

 public ClassScanner(Context context) {
 mContext = context;
 }

 public Context getContext() {
 return mContext;
 }

 void scan() throws IOException, ClassNotFoundException, NoSuchMethodException {
 long timeBegin = System.currentTimeMillis();

 PathClassLoader classLoader = (PathClassLoader) getContext().getClassLoader();
 //PathClassLoader classLoader = (PathClassLoader) Thread.currentThread().getContextClassLoader();//This also works good
 DexFile dexFile = new DexFile(getContext().getPackageCodePath());
 Enumeration&lt;String&gt; classNames = dexFile.entries();
 while (classNames.hasMoreElements()) {
 String className = classNames.nextElement();
 if (isTargetClassName(className)) {
 //Class&lt;?&gt; aClass = Class.forName(className);//java.lang.ExceptionInInitializerError
 //Class&lt;?&gt; aClass = Class.forName(className, false, classLoader);//tested on 魅蓝Note(M463C)_Android4.4.4 and Mi2s_Android5.1.1
 Class&lt;?&gt; aClass = classLoader.loadClass(className);//tested on 魅蓝Note(M463C)_Android4.4.4 and Mi2s_Android5.1.1
 if (isTargetClass(aClass)) {
 onScanResult(aClass);
 }
 }
 }

 long timeEnd = System.currentTimeMillis();
 long timeElapsed = timeEnd - timeBegin;
 Log.d(TAG, "scan() cost " + timeElapsed + "ms");
 }

 protected abstract boolean isTargetClassName(String className);

 protected abstract boolean isTargetClass(Class clazz);

 protected abstract void onScanResult(Class clazz);
}
</code></pre>

and this is a example how to use:

<pre><code>new ClassScanner(context) {

 @Override
 protected boolean isTargetClassName(String className) {
 return className.startsWith(getContext().getPackageName())//I want classes under my package
 &amp;&amp; !className.contains("$");//I don't need none-static inner classes
 }

 @Override
 protected boolean isTargetClass(Class clazz) {
 return AbsFactory.class.isAssignableFrom(clazz)//I want subclasses of AbsFactory
 &amp;&amp; !Modifier.isAbstract(clazz.getModifiers());//I don't want abstract classes
 }

 @Override
 protected void onScanResult(Class clazz) {
 Constructor constructor = null;
 try {
 constructor = clazz.getDeclaredConstructor();
 constructor.setAccessible(true);
 constructor.newInstance();
 } catch (NoSuchMethodException e) {
 e.printStackTrace();
 } catch (InstantiationException e) {
 e.printStackTrace();
 } catch (IllegalAccessException e) {
 e.printStackTrace();
 } catch (InvocationTargetException e) {
 e.printStackTrace();
 }
 }

}.scan();
</code></pre>

blocks|key|357046|text|我找到了与Sergey+Shustikov相同的解决方案，它的包名是从上下文派生的，并处理内部类。不幸的是，当它在Galaxy+Nexus上工作时，它不能在Nexus+6和Nexus+6p上工作(没有在其他设备上测试)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|357047|代码如下：|357048|private+HashMap<String,+String>+loadClassFullnames()+{
++++final+HashMap<String,+String>+ret+=+new+HashMap<>();
++++try+{
++++++++final+String+thisPackage+=+context.getPackageName();
++++++++final+DexFile+tmp+=+new+DexFile(context.getPackageCodePath());
++++++++for+(Enumeration<String>+iter+=+tmp.entries();+iter.hasMoreElements();+)+{
++++++++++++final+String+classFullname+=+iter.nextElement();
++++++++++++if+(classFullname.startsWith(thisPackage))+{
++++++++++++++++//+TODO+filter+out+also+anonymous+classes+(es+Class1$51)
++++++++++++++++final+int+index+=+classFullname.lastIndexOf(".");
++++++++++++++++final+String+c+=+(index+>=+0)+?+classFullname.substring(index+%2B+1)+:+classFullname;
++++++++++++++++ret.put(c.replace('$',+'.'),+classFullname);
++++++++++++}
++++++++}
++++}+catch+(Throwable+ex)+{
++++++++Debug.w("Unable+to+collect+class+fullnames.+Reason:+"+%2B+ex.getCause()+%2B+"\n\rStack+Trace:\n\r"+%2B+((ex.getCause()+!=+null)?+ex.getCause().getStackTrace():+"none"));
++++}

++++return+ret;
}|code-block|syntax|javascript|357049|这表明在Galaxy+Nexus上，DexFile也包含应用程序包(我们正在尝试查找的包！)，而在Nexus6p上，没有找到来自匹配thisPackage的包，而其他一些包在那里……有没有人有同样的问题？|357050|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I found the same solution of Sergey Shustikov, with the package name derived form the context and handles inner classes. Unfortunally while it's working on Galaxy Nexus, it's not working on Nexus 6 and Nexus 6p (not tested on other devices).

Here's the code:

<pre><code>private HashMap&lt;String, String&gt; loadClassFullnames() {
 final HashMap&lt;String, String&gt; ret = new HashMap&lt;&gt;();
 try {
 final String thisPackage = context.getPackageName();
 final DexFile tmp = new DexFile(context.getPackageCodePath());
 for (Enumeration&lt;String&gt; iter = tmp.entries(); iter.hasMoreElements(); ) {
 final String classFullname = iter.nextElement();
 if (classFullname.startsWith(thisPackage)) {
 // TODO filter out also anonymous classes (es Class1$51)
 final int index = classFullname.lastIndexOf(".");
 final String c = (index &gt;= 0) ? classFullname.substring(index + 1) : classFullname;
 ret.put(c.replace('$', '.'), classFullname);
 }
 }
 } catch (Throwable ex) {
 Debug.w("Unable to collect class fullnames. Reason: " + ex.getCause() + "\n\rStack Trace:\n\r" + ((ex.getCause() != null)? ex.getCause().getStackTrace(): "none"));
 }

 return ret;
}
</code></pre>

It seams that on Galaxy Nexus, the DexFile contains also the application packages (the one we are trying to find!), while on Nexus 6[p] no package from matching thisPackage are found while some other packages are there...
Does anybody have the same problem?

blocks|key|139170|text|这些方法通常是过时的，并且不适用于多索引应用程序。要支持multidex，您可以获得所有的DexFiles，如下所示|type|unstyled|depth|inlineStyleRanges|entityRanges|data|139171|internal+fun+getDexFiles(context:+Context):+Sequence<DexFile>+{
++++//+Here+we+do+some+reflection+to+access+the+dex+files+from+the+class+loader.+These+implementation+details+vary+by+platform+version,
++++//+so+we+have+to+be+a+little+careful,+but+not+a+huge+deal+since+this+is+just+for+testing.+It+should+work+on+21%2B.
++++//+The+source+for+reference+is+at:
++++//+https://android.googlesource.com/platform/libcore/%2B/oreo-release/dalvik/src/main/java/dalvik/system/BaseDexClassLoader.java
++++val+classLoader+=+context.classLoader+as+BaseDexClassLoader

++++val+pathListField+=+field("dalvik.system.BaseDexClassLoader",+"pathList")
++++val+pathList+=+pathListField.get(classLoader)+//+Type+is+DexPathList

++++val+dexElementsField+=+field("dalvik.system.DexPathList",+"dexElements")
++++@Suppress("UNCHECKED_CAST")
++++val+dexElements+=+dexElementsField.get(pathList)+as+Array<Any>+//+Type+is+Array<DexPathList.Element>

++++val+dexFileField+=+field("dalvik.system.DexPathList\$Element",+"dexFile")
++++return+dexElements.map+{
++++++++dexFileField.get(it)+as+DexFile
++++}.asSequence()
}

private+fun+field(className:+String,+fieldName:+String):+Field+{
++++val+clazz+=+Class.forName(className)
++++val+field+=+clazz.getDeclaredField(fieldName)
++++field.isAccessible+=+true
++++return+field
}|code-block|syntax|javascript|139172|在那里，您可以像这样使用它来获取包中的所有类|139173|getDexFiles(context)
++++++++++++.flatMap+{+it.entries().asSequence()+}
++++++++++++.filter+{+it.startsWith("my.package.name")+}
++++++++++++.map+{+context.classLoader.loadClass(it)+}|139174|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

These approaches are generally outdated and don't work with multi dex apps. To support multidex you can get all of the DexFiles like this

<pre><code>internal fun getDexFiles(context: Context): Sequence&lt;DexFile&gt; {
 // Here we do some reflection to access the dex files from the class loader. These implementation details vary by platform version,
 // so we have to be a little careful, but not a huge deal since this is just for testing. It should work on 21+.
 // The source for reference is at:
 // https://android.googlesource.com/platform/libcore/+/oreo-release/dalvik/src/main/java/dalvik/system/BaseDexClassLoader.java
 val classLoader = context.classLoader as BaseDexClassLoader

 val pathListField = field("dalvik.system.BaseDexClassLoader", "pathList")
 val pathList = pathListField.get(classLoader) // Type is DexPathList

 val dexElementsField = field("dalvik.system.DexPathList", "dexElements")
 @Suppress("UNCHECKED_CAST")
 val dexElements = dexElementsField.get(pathList) as Array&lt;Any&gt; // Type is Array&lt;DexPathList.Element&gt;

 val dexFileField = field("dalvik.system.DexPathList\$Element", "dexFile")
 return dexElements.map {
 dexFileField.get(it) as DexFile
 }.asSequence()
}

private fun field(className: String, fieldName: String): Field {
 val clazz = Class.forName(className)
 val field = clazz.getDeclaredField(fieldName)
 field.isAccessible = true
 return field
}
</code></pre>

From there you can use it like this to get all classes in a package

<pre><code>getDexFiles(context)
 .flatMap { it.entries().asSequence() }
 .filter { it.startsWith("my.package.name") }
 .map { context.classLoader.loadClass(it) }
</code></pre>

How can i find all classes inside a package on Android? I use PathClassLoader, but it always returns an empty enumeration?

Additional info

Tried the suggested Reflections approach. Couple of important points about reflections library. The library available through maven central is not compatible with Android and gives dex errors. I had to include source and compile dom4j, java-assist. 

The problem with reflections, and my original solution is that PathClassLoader in android returns an empty enumeration for package. 

The issue with approach is that getResource in Android is always returning empty enumeration.

<pre><code>final String resourceName = aClass.getName().replace(".", "/") + ".class";

for (ClassLoader classLoader : loaders) {
 try {
 final URL url = classLoader.getResource(resourceName);
 if (url != null) {
 final String normalizedUrl = url.toExternalForm().substring(0, url.toExternalForm().lastIndexOf(aClass.getPackage().getName().replace(".", "/")));
 return new URL(normalizedUrl);
 }
 } catch (MalformedURLException e) {
 e.printStackTrace();
 }
 }
</code></pre>

Find all classes in a package in Android

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何在Android上找到一个包中的所有类？我使用PathClassLoader，但是它总是返回一个空的枚举？更多信息已尝试建议的反射方法。关于反射库的几个要点。maven central提供的库与Android不兼容，并给出了dex错误。我必须包括源代码和编译dom4j，java-assist。反射的问题，我最初的解...

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