Questions[android-studio]

I have a project made in android-studio synced with a public Github repository.

Now I just added a file with sensitive data to my project that I never want to sync.

Is it possible to mark it from now, so it won't be pushed to Github at the next sync or any other?

I was looking through the options and did not see that possibility. I think I did that during the sync process, but I don't want to sync again just for that file and on the other hand I don't want an automatic sync to happen and the file will end up in the repository.

Is there a way to mark it for no sync?

When updating Android studio to the new version 3.1.1, it has told me that I should change things in the dependencies compilebecause implementationI have uploaded the compilation version to 27...

But gradle when doing build returns me the error:

Android dependency 'com.android.support.constraint:constraint-layout' has different version for the compile (1.0.2) and runtime (1.1.0) classpath. You should manually set the same version via DependencyResolution

I have reset the cache with (File -> Invalidate Caches/Restart -> Invalidate and Restart).but it still gives the error

Of all the modules that I use, only one uses constraint-layoutand I have it implementation 'com.android.support.constraint:constraint-layout:1.1.0'in principle it should be well established.

Searching by SO I have found the recommendation to use apibeforeimplementation

as follows

api 'com.android.support.constraint:constraint-layout:1.1.0'

And it has been mysteriously fixed...

My question is what is the difference in using implementationor api?

I am creating an app which has a login (main activity) and a record, when this process goes through, I go to enter a Navigation Drawer activity I have the fragments but it loads blank, when pressing the options of said menu they are loaded the fragments correctly, my problem is that I want it to open already with the starting fragment and not load blank.

package company.viral.organizadorjec;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import company.viral.organizadorjec.Fragment.AjustesF;
import company.viral.organizadorjec.Fragment.CalendarioF;
import company.viral.organizadorjec.Fragment.InicioF;
import company.viral.organizadorjec.Fragment.PerfilF;
import company.viral.organizadorjec.Fragment.ProfesoresF;

public class Menucentral extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menucentral);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);
}

@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menucentral, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    FragmentManager fragmentManager = getSupportFragmentManager();

    if (id == R.id.nav_camera) {
        fragmentManager.beginTransaction().replace(R.id.contenedor,new InicioF()).commit();
    } else if (id == R.id.nav_gallery) {
        fragmentManager.beginTransaction().replace(R.id.contenedor,new ProfesoresF()).commit();
    } else if (id == R.id.nav_slideshow) {
        fragmentManager.beginTransaction().replace(R.id.contenedor,new CalendarioF()).commit();
    } else if (id == R.id.nav_manage) {
        fragmentManager.beginTransaction().replace(R.id.contenedor,new AjustesF()).commit();
    } else if (id == R.id.nav_share) {
        fragmentManager.beginTransaction().replace(R.id.contenedor,new PerfilF()).commit();
    } else if (id == R.id.nav_send) {

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}
}

I am making an android application that has a map in which clicking on a marker shows the infowindow as follows:

But I need the infowindow to appear in the following way and I don't know how to do it:

How can I do it? Some example? Thank you

I have a problem trying to install android studio on Ubuntu 14.04. I get the following error:

ERROR: Cannot start Android Studio
No JDK found. Please validate either STUDIO_JDK, JDK_HOME or JAVA_HOME environment variable points to valid JDK installation.

I've already been researching and I only found a solution in Windows in which environment variables have to be created, but in ubuntu I don't find anything, and it is assumed that I already have the JDK installed.