'Error of connection jdbc postgreSQL Android Studio - Failed resolution of: Ljava/lang/management/ManagementFactory;

I don't understand why the code doesn't works on Android, it's the same code in Java and it's works on my laptop. I've already search on Google, Stackoverflow, and Youtube, but I didn't find the reason. On all Youtube tutorials, this type of code works on android. Example : https://www.youtube.com/watch?v=lM2vDPPx4Xg or https://www.youtube.com/watch?v=MnmEXqfV5BU

Here is the code :

@Override
    protected Void doInBackground(Void... voids) {
        try{
            Class c=Class.forName("org.postgresql.Driver");
            Driver driver=(Driver) c.newInstance();
            DriverManager.registerDriver(driver);
            String url="jdbc:postgresql://url?sslmode=verify-ca&sslfactory=org.postgresql.ssl.DefaultJavaSSLFactory";
            String username="username";
            String password="pwd";

            this.conn=DriverManager.getConnection(url,username,password);

            //statement for make request
            this.stmt=this.conn.createStatement();
            System.out.println("Connecté !");
            conn_load=false;
        }catch (Exception e){
            System.out.println("Connexion problem");
            System.out.println(e.getCause());
        }
        return null;
    }

In the windows terminal the code works but not on android :

Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Ljava/lang/management/ManagementFactory;
        at org.postgresql.util.PGPropertyMaxResultBufferParser.adjustResultSize(PGPropertyMaxResultBufferParser.java:200)
        at org.postgresql.util.PGPropertyMaxResultBufferParser.parseProperty(PGPropertyMaxResultBufferParser.java:37)
        at org.postgresql.core.PGStream.setMaxResultBuffer(PGStream.java:643)
        at org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:102)
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:197)
        at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
        at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:217)
        at org.postgresql.Driver.makeConnection(Driver.java:458)
        at org.postgresql.Driver.connect(Driver.java:260)
        at java.sql.DriverManager.getConnection(DriverManager.java:569)
        at java.sql.DriverManager.getConnection(DriverManager.java:219)
        at com.devoteam.recrutement.model.bdd.BDD.doInBackground(BDD.java:54)
        at com.devoteam.recrutement.model.bdd.BDD.doInBackground(BDD.java:12)
        at android.os.AsyncTask$2.call(AsyncTask.java:333)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:764) 
     Caused by: java.lang.ClassNotFoundException: Didn't find class "java.lang.management.ManagementFactory" on path: DexPathList[[zip file "/data/app/com.devoteam.recrutement-B8V00xTM4oetyFeYswlxVQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.devoteam.recrutement-B8V00xTM4oetyFeYswlxVQ==/lib/arm, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at org.postgresql.util.PGPropertyMaxResultBufferParser.adjustResultSize(PGPropertyMaxResultBufferParser.java:200) 
        at org.postgresql.util.PGPropertyMaxResultBufferParser.parseProperty(PGPropertyMaxResultBufferParser.java:37) 
        at org.postgresql.core.PGStream.setMaxResultBuffer(PGStream.java:643) 
        at org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:102) 
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:197) 
        at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49) 
        at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:217) 
        at org.postgresql.Driver.makeConnection(Driver.java:458) 
        at org.postgresql.Driver.connect(Driver.java:260) 
        at java.sql.DriverManager.getConnection(DriverManager.java:569) 
        at java.sql.DriverManager.getConnection(DriverManager.java:219) 
        at com.devoteam.recrutement.model.bdd.BDD.doInBackground(BDD.java:54) 
        at com.devoteam.recrutement.model.bdd.BDD.doInBackground(BDD.java:12) 
        at android.os.AsyncTask$2.call(AsyncTask.java:333) 
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:764) 
javaandroidpostgresqljdbc


Solution 1:[1]

Same problem using version 42.3.4. In this blog post, they are using 42.2.5 with success. I changed to 42.2.5 JDBC 42 and could connect.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Leonardo Alves Machado

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