disapp/app/src/main/java/org/disroot/disrootapp/ui/WelcomeActivity.java

package org.disroot.disrootapp.ui;

import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageButton;

import org.disroot.disrootapp.R;

import org.disroot.disrootapp.utils.Constants;

public class WelcomeActivity extends AppCompatActivity {
    ImageButton imageButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);
        imageButton = findViewById(R.id.homeBtn);//Home
        imageButton.setOnClickListener( arg0 -> {
            Intent goHome = new Intent(WelcomeActivity.this, MainActivity.class);
            WelcomeActivity.this.startActivity(goHome);
        } );

        imageButton = findViewById(R.id.fDroidBtn);//Home
        imageButton.setOnClickListener( arg0 -> {
            Uri uri = Uri.parse( Constants.URL_FDROID );
            Intent fDroid = new Intent(Intent.ACTION_VIEW, Uri.parse(String.valueOf(uri)));
            startActivity(fDroid);
        } );
    }
}