Main2Activity

package it.rapz.sfondideirapper;

import android.Manifest;
import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.media.MediaScannerConnection;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;

import java.io.File;
import java.util.Arrays;
import java.util.Random;

public class Main2Activity extends AppCompatActivity {

    ListView listview;
    Context context;
    private static LayoutInflater inflater = null;
    private BroadcastReceiver mDLCompleteReceiver;
    private static BroadcastReceiver mDLCompleteReceiver2;
    public static final int idFoto = 14;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        Context context3 = getApplicationContext();
        CharSequence text = "Premi uno sfondo per scaricarlo!";
        int duration = Toast.LENGTH_LONG;

        Toast toast = Toast.makeText(context3, text, duration);
        toast.show();

        int permissionCheck = ContextCompat.checkSelfPermission(Main2Activity.this,
                Manifest.permission.WRITE_EXTERNAL_STORAGE);
        Log.e("ImageSaver", "WRITE_EXTERNAL_STORAGE:"+permissionCheck);


        if (ContextCompat.checkSelfPermission(Main2Activity.this,
                Manifest.permission.WRITE_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED) {

            if (ActivityCompat.shouldShowRequestPermissionRationale(Main2Activity.this,
                    Manifest.permission.WRITE_EXTERNAL_STORAGE)) {

            } else {

                // No explanation needed, we can request the permission.

                ActivityCompat.requestPermissions(Main2Activity.this,
                        new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                        1);

                int permissionCheck2 = ContextCompat.checkSelfPermission(Main2Activity.this,
                        Manifest.permission.WRITE_EXTERNAL_STORAGE);
                Log.e("ImageSaver", "WRITE_EXTERNAL_STORAGE:"+permissionCheck2);

            }
        }


        listview = (ListView) findViewById(R.id.listview);


        String[] str = new String[idFoto];

        listview.setAdapter(new yourAdapter(this, str));

        listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                Log.d("TAAAAG", "destra: ");
                Log.d("TAAAAG", "pos:"+position);
                Boolean ok = true;

                ImageView mImageView = (ImageView) findViewById(R.id.immagine);

                String name = "";
                if (name.isEmpty()) name = "sfondo_" + Math.abs(new Random().nextInt());
                int numFoto = idFoto - position;
                String url = "http://rapz.it/Sfondi/"+(numFoto)+".jpg";
                Log.d("NuovoTag", "pos:"+position);
                Log.d("NuovoTag", "id:"+idFoto);
                Log.d("NuovoTag", "http://rapz.it/Sfondi/"+(numFoto)+".jpg");

                DownloadManager.Request request;

                try {
                    request = new DownloadManager.Request(Uri.parse(url));
                } catch (IllegalArgumentException e) {
                    Log.d("NuovoTag", "Error: " + e.getMessage());
                    request = null;
                    ok = false;
                }
                /* allow mobile and WiFi downloads */
                if(ok) {
                    request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);
                    request.setTitle("DM Example");
                    request.setDescription("Downloading file");

                /* we let the user see the download in a notification */
                    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
                /* Try to determine the file extension from the url. Only allow image types. You
                 * can skip this check if you only plan to handle the downloaded file manually and
                 * don't care about file managers not recognizing the file as a known type */
                    String[] allowedTypes = {"png", "jpg", "jpeg", "gif", "webp"};
                    String suffix = url.substring(url.lastIndexOf(".") + 1).toLowerCase();
                    if (!Arrays.asList(allowedTypes).contains(suffix)) {
                        Log.d("NuovoTag", "Invalid file extension. Allowed types: \n");
                        String tvStatus = "";
                        ok = false;
                    }

                    if (ok) {
                        /* set the destination path for this download */
                        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS +
                                File.separator + "sfondi_dei_rapper", name + "." + suffix);
                        /* allow the MediaScanner to scan the downloaded file */
                        request.allowScanningByMediaScanner();
                        final DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);

                        /* this is our unique download id */
                        final long DL_ID = dm.enqueue(request);

                        /* get notified when the download is complete */
                        mDLCompleteReceiver = new BroadcastReceiver() {

                            @Override
                            public void onReceive(Context context, Intent intent) {
                                /* our download */
                                if (DL_ID == intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1L)) {

                                    //tvStatus.clearAnimation();
                                    /* get the path of the downloaded file */
                                    DownloadManager.Query query = new DownloadManager.Query();
                                    query.setFilterById(DL_ID);
                                    Cursor cursor = dm.query(query);
                                    if (!cursor.moveToFirst()) {
                                        //tvStatus.setText("Download error: cursor is empty");
                                        Log.d("NuovoTag", "IDownload error: cursor is empty");
                                        return;
                                    }

                                    if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))
                                            != DownloadManager.STATUS_SUCCESSFUL) {
                                        //tvStatus.setText("Download failed: no success status");
                                        Log.d("NuovoTag", "Download failed: no success status");
                                        return;
                                    }

                                    String path = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
                                    Log.d("NuovoTag", "File download complete. Location: \n" + path);
                                    Context context2 = getApplicationContext();
                                    CharSequence text = "Sfondo scaricato! \nPuoi trovarlo nella galleria";
                                    int duration = Toast.LENGTH_LONG;

                                    Toast toast = Toast.makeText(context2, text, duration);
                                    toast.show();

                                }
                            }
                        };
                        /* register receiver to listen for ACTION_DOWNLOAD_COMPLETE action */
                        registerReceiver(mDLCompleteReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
                    }
                }



            }
        });


    }

    public void MetodoDownload(int position, int destra)
    {
        Log.d("nTAAAAG", "1");
        Log.d("TAAAAG", "destra: "+destra);
        Log.d("TAAAAG", "pos:"+position);
        Boolean ok = true;


        String name = "";
        if (name.isEmpty()) name = "sfondo_" + Math.abs(new Random().nextInt());
        int numFoto = idFoto - position;
        String url = "";
        if(destra == 1)
        {
            url = "http://rapz.it/Sfondi/"+(numFoto*2)+".jpg";
        }
        else
        {
            url = "http://rapz.it/Sfondi/"+(numFoto)+".jpg";
        }
        Log.d("nTAAAAG", "1");
        //////////////////
        Log.d("NuovoTag", "pos:"+position);
        Log.d("NuovoTag", "id:"+idFoto);
        Log.d("NuovoTag", "http://rapz.it/Sfondi/"+(numFoto)+".jpg");

        DownloadManager.Request request;

        try {
            request = new DownloadManager.Request(Uri.parse(url));
        } catch (IllegalArgumentException e) {
            Log.d("NuovoTag", "Error: " + e.getMessage());
            request = null;
            ok = false;
        }
                /* allow mobile and WiFi downloads */
        if(ok) {
            request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);
            request.setTitle("DM Example");
            request.setDescription("Downloading file");

                /* we let the user see the download in a notification */
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
                /* Try to determine the file extension from the url. Only allow image types. You
                 * can skip this check if you only plan to handle the downloaded file manually and
                 * don't care about file managers not recognizing the file as a known type */
            String[] allowedTypes = {"png", "jpg", "jpeg", "gif", "webp"};
            String suffix = url.substring(url.lastIndexOf(".") + 1).toLowerCase();
            if (!Arrays.asList(allowedTypes).contains(suffix)) {
                Log.d("NuovoTag", "Invalid file extension. Allowed types: \n");
                String tvStatus = "";
                ok = false;
            }

            if (ok) {
                        /* set the destination path for this download */
                request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS +
                        File.separator + "sfondi_dei_rapper", name + "." + suffix);
                        /* allow the MediaScanner to scan the downloaded file */
                request.allowScanningByMediaScanner();
                final DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);

                        /* this is our unique download id */
                final long DL_ID = dm.enqueue(request);

                        /* get notified when the download is complete */
                mDLCompleteReceiver = new BroadcastReceiver() {

                    @Override
                    public void onReceive(Context context, Intent intent) {
                                /* our download */
                        if (DL_ID == intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1L)) {

                            //tvStatus.clearAnimation();
                                    /* get the path of the downloaded file */
                            DownloadManager.Query query = new DownloadManager.Query();
                            query.setFilterById(DL_ID);
                            Cursor cursor = dm.query(query);
                            if (!cursor.moveToFirst()) {
                                //tvStatus.setText("Download error: cursor is empty");
                                Log.d("NuovoTag", "IDownload error: cursor is empty");
                                return;
                            }

                            if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))
                                    != DownloadManager.STATUS_SUCCESSFUL) {
                                //tvStatus.setText("Download failed: no success status");
                                Log.d("NuovoTag", "Download failed: no success status");
                                return;
                            }

                            String path = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
                            Log.d("NuovoTag", "File download complete. Location: \n" + path);
                            Context context2 = getApplicationContext();
                            CharSequence text = "Sfondo scaricato! \nPuoi trovarlo nella galleria";
                            int duration = Toast.LENGTH_LONG;

                            Toast toast = Toast.makeText(context2, text, duration);
                            toast.show();

                        }
                    }
                };
                        /* register receiver to listen for ACTION_DOWNLOAD_COMPLETE action */
                registerReceiver(mDLCompleteReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
            }
        }

        destra = 0;


    }

    static public boolean resetExternalStorageMedia(Context context) {
        if (Environment.isExternalStorageEmulated())
            return (false);
        Uri uri = Uri.parse("file://" + Environment.getExternalStorageDirectory());
        Intent intent = new Intent(Intent.ACTION_MEDIA_MOUNTED, uri);

        context.sendBroadcast(intent);
        return (true);
    }

    static public void notifyMediaScannerService(Context context, String path) {
        MediaScannerConnection.scanFile(context,
                new String[] { path }, null,
                new MediaScannerConnection.OnScanCompletedListener() {
                    public void onScanCompleted(String path, Uri uri) {
                        Log.i("ExternalStorage", "Scanned " + path + ":");
                        Log.i("ExternalStorage", "-> uri=" + uri);
                    }
                });
    }

}