Count the number of methods in the JAR package Dex file

in the previous period of time doing Android projects, there has been a problem of more than 65535 methods, if the number of methods in the code is not more than 65535, you can

add a line to the Project.Properties file dex.force.jumbo=true, solve this problem.

Later, referring to some methods on the Internet, I wrote a gadget to count the number of methods in jar packages and Dex files. The main principle is to use the Dex file structure of the file header has a method_ids_siz to count the number of methods.

Now share it, the code is as follows, the direct copy is compiled into a jar package, and then the console: Java-jar Xxx.jar file can see the output. folder, jar, and Dex files are currently supported.

Import Java.io.bufferedinputstream;import Java.io.bufferedreader;import Java.io.file;import Java.io.fileinputstream;import Java.io.filenotfoundexception;import Java.io.ioexception;import Java.io.inputstreamreader;public class Test2 {private void Test () {}private final static String jar = "Jar";p rivate final static string dex = "Dex";p rivate final static string DIR = "dir";p rivate final static string UNKNOWN = "UNKNOWN";/** * based on The extension gets the file type */public static string Getfiletype (string path) {String type = unknown;try {File File = new file (path), if (file. Isdirectory ()) {type = DIR;} else {if (Getextensionname (File.getname ()). Equalsignorecase (DEX)) {type = DEX;} else if (Gete Xtensionname (File.getname ()). Equalsignorecase (Jar)) {type = jar;}}} catch (Exception e) {}return type;} public static void Main (string[] args) {if (args.length! = 1) {System.out.println ("Param Error");} else {String type = Get FileType (Args[0]), if (Type.equalsignorecase (DEX)) {Resolvedex (args[0]);} else if (Type.equalsignorecASE (JAR)) {Resolvejar (Args[0]),} else if (Type.equalsignorecase (DIR)) {Resolvedir (args[0]);} else {System.err.println ("Unknown File Type");}} SYSTEM.OUT.PRINTLN ("parsing End");} /** * Simple get extension, not completely accurate. If it is completely accurate, it can be judged according to the file stream. * @param filename * @return */public static string Getextensionname (string filename) {if ((filename! = null) && (f Ilename.length () > 0)) {int dot = filename.lastindexof ('. '); if (dot >-1) && (dot < (Filename.length ()-1)) {return filename.substring (dot + 1);}} return filename;} /** * Process Dex File * * @param path */public static void Resolvedex (String path) {try {File file = new file (path);  FileInputStream fis = new FileInputStream (file); byte[] bytes = new byte[1000];if (fis.read (bytes)! =-1) {StringBuilder SB = new StringBuilder (); for (int i = i--; i >) {sb.append (integer.tobinarystring (Bytes[i] & 255));} System.out.println (File.getname () + "Number of methods:" + Integer.parseint (sb.tostring (), 2));}} catch (FileNotFoundException e) {e.printstacktrace ();} CATCH (IOException e) {e.printstacktrace ();}} /** * Parse jar * * @param path */public static void Resolvejar (string filePath) {try {string path = system.getenv ("DX"); Processbuilder pb=new processbuilder ("Dx.bat", "--dex", "--output=c://temp.dex", FilePath);p b.directory (New File ( Path));p B.redirecterrorstream (true); Process p =pb.start (); Bufferedinputstream in = new Bufferedinputstream (P.getinputstream ()); BufferedReader INBR = new BufferedReader (new InputStreamReader (in)); String linestr;while ((linestr = Inbr.readline ()) = null) {//Get command output information in console after//system.out.println (LINESTR);//print output information} Checks whether the command failed to execute. if (p.waitfor () = 0) {if (P.exitvalue ()! = 0) {//P.exitvalue () ==0 indicates normal end, 1: Abnormal end System.err.println (filepath+ "command execution failed!"); Inbr.close (); In.close (); return;}} Inbr.close (); In.close (); File Originfile = new file (FilePath); File File = new file ("C://temp.dex");  FileInputStream fis = new FileInputStream (file); byte[] bytes = new byte[1000];if (fis.read (bytes)! =-1) {StringBuilder SB = new StringBuilder (); for (int i = 91; i > 87; i--) {sb.append (String.Format ("%02x", (Bytes[i] & 255)));} System.out.println (Originfile.getabsolutepath () + "Number of methods:" + Integer.parseint (sb.tostring (), 16));} File.deleteonexit ();} catch (IOException e) {e.printstacktrace ();} catch (Interruptedexception e) {e.printstacktrace ()}} /** * Recursively processing file directory * @param path */public static void Resolvedir (String path) {file File=new file (path); file[] fileList = File.listfiles (); for (int i = 0; i < filelist.length; i++) {if (Filelist[i].isdirectory ()) {Resolvedir ( Filelist[i].getabsolutepath ());} Else{if (Getfiletype (Filelist[i].getabsolutepath ()). Equalsignorecase (DEX)) {Resolvedex (Filelist[i]. GetAbsolutePath ());} else if (Getfiletype (Filelist[i].getabsolutepath ()). Equalsignorecase (JAR)) {Resolvejar (Filelist[i]. GetAbsolutePath ());}}}}

　　

Count the number of methods in the JAR package Dex file