Java tutorial
/* * Copyright 2017 Michael Nguyen * * This file is part of Music.php-Android. * * Music.php-Android is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Music.php-Android is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Music.php-Android. If not, see <http://www.gnu.org/licenses/>. */ package io.tehtotalpwnage.musicphp_android; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.os.AsyncTask; import android.support.v4.content.ContextCompat; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import com.android.volley.Request; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.StringRequest; import org.json.JSONArray; import org.json.JSONObject; import java.io.BufferedInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import java.util.HashMap; import java.util.Map; class AlbumListingAdapter extends BaseAdapter { private final String TAG = AlbumListingAdapter.class.getSimpleName(); private Context context; private String sAddress; private String token; private String[][] values; AlbumListingAdapter(Context context, String[][] values, String token) { this.context = context; this.sAddress = context.getSharedPreferences("Prefs", 0).getString("server", null); this.token = token; this.values = values; } @Override public int getCount() { return values.length; } @Override public Object getItem(int position) { return values[position]; } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View albumView = inflater.inflate(R.layout.album_layout, parent, false); ViewHolder holder = new ViewHolder(); holder.name = (TextView) albumView.findViewById(R.id.textView7); holder.artist = (TextView) albumView.findViewById(R.id.textView8); holder.image = (ImageView) albumView.findViewById(R.id.imageView4); albumView.setTag(holder); holder.name.setText(values[position][0]); holder.artist.setText(values[position][1]); final DownloadImage downloadImage = new DownloadImage(); downloadImage.execute(values[position][2]); try { holder.image.setImageDrawable(new BitmapDrawable(context.getResources(), downloadImage.get())); } catch (Exception e) { e.printStackTrace(); } albumView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Log.v(TAG, "Attempting to get information for album ID " + values[position][2]); StringRequest req = new StringRequest(Request.Method.GET, sAddress + "/api/albums/" + values[position][2], new Response.Listener<String>() { public void onResponse(String response) { try { JSONArray json = new JSONObject(response).getJSONArray("tracks"); String[][] tracks = new String[json.length()][2]; for (int i = 0; i < json.length(); i++) { JSONObject object = json.getJSONObject(i); tracks[i][0] = object.getString("id"); tracks[i][1] = object.getString("title"); } Intent intent = new Intent(context, AlbumActivity.class); intent.putExtra("album", tracks); intent.putExtra("token", token); Log.d(TAG, "Writing Bitmap to storage"); File rootDir = new File(context.getFilesDir(), "albums"); rootDir.mkdirs(); FileOutputStream stream = new FileOutputStream( new File(rootDir, values[position][2] + ".jpg")); downloadImage.get().compress(Bitmap.CompressFormat.JPEG, 100, stream); stream.close(); Log.d(TAG, "File writing complete"); intent.putExtra("art", values[position][2] + ".jpg"); context.startActivity(intent); } catch (Exception e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { } }) { @Override public Map<String, String> getHeaders() { Map<String, String> params = new HashMap<>(); params.put("Accept", "application/json"); params.put("Authorization", "Bearer " + token); return params; } }; VolleySingleton.getInstance(context).addToRequestQueue(req); } }); return albumView; } private static class ViewHolder { TextView name; TextView artist; ImageView image; } private class DownloadImage extends AsyncTask<String, Integer, Bitmap> { @Override protected Bitmap doInBackground(String... params) { return downloadImage(params[0]); } private Bitmap downloadImage(String url) { try { Log.d(TAG, "Fetching album art for album " + url); HttpURLConnection conn = (HttpURLConnection) new URL(sAddress + "/api/albums/" + url + "/image") .openConnection(); conn.setRequestProperty("Accept", "application/json"); conn.setRequestProperty("Authorization", "Bearer " + token); // conn.setInstanceFollowRedirects(true); conn.connect(); Log.d(TAG, "Got response code " + conn.getResponseCode() + " for request on album ID " + url); InputStream in = conn.getInputStream(); BufferedInputStream buf = new BufferedInputStream(in); Bitmap bMap = BitmapFactory.decodeStream(buf); if (bMap == null) { Drawable drawable = ContextCompat.getDrawable(context, R.drawable.ic_noalbum); bMap = Bitmap.createBitmap(960, 960, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bMap); drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight()); drawable.draw(canvas); } in.close(); buf.close(); return bMap; } catch (Exception e) { e.printStackTrace(); } return null; } } }