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.accounts.Account; import android.accounts.AccountManager; import android.accounts.AccountManagerCallback; import android.accounts.AccountManagerFuture; import android.app.ActionBar; import android.content.ComponentName; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import android.os.AsyncTask; import android.os.Build; import android.os.Bundle; import android.os.RemoteException; import android.support.annotation.NonNull; import android.support.design.widget.NavigationView; import android.support.v4.media.MediaBrowserCompat; import android.support.v4.media.session.MediaControllerCompat; import android.support.v4.media.session.MediaSessionCompat; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.util.TypedValue; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.FrameLayout; import android.widget.GridView; import android.widget.ListView; import android.widget.TextView; import com.android.volley.AuthFailureError; import com.android.volley.NetworkResponse; 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.JSONException; import org.json.JSONObject; import java.net.HttpURLConnection; import java.util.HashMap; import java.util.List; import java.util.Map; public class NavigationActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, PlayerFragment.OnFragmentInteractionListener { private static final String TAG = NavigationActivity.class.getSimpleName(); private MediaBrowserCompat mMediaBrowser; private NavigationView nav; private List<MediaSessionCompat.QueueItem> queue; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_navigation); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); 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.addDrawerListener(toggle); toggle.syncState(); nav = (NavigationView) findViewById(R.id.nav_view); nav.setNavigationItemSelectedListener(this); mMediaBrowser = new MediaBrowserCompat(this, new ComponentName(this, MediaPlaybackService.class), mConnectionCallback, null); nav.getMenu().performIdentifierAction(R.id.nav_camera, 0); nav.setCheckedItem(R.id.nav_camera); } @Override public void onBackPressed() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawer(GravityCompat.START); } else if (getCheckedItem(nav) != 0) { Log.d(TAG, "MenuItem " + getCheckedItem(nav) + " was selected"); nav.getMenu().performIdentifierAction(R.id.nav_camera, 0); nav.setCheckedItem(R.id.nav_camera); } else { Log.d(TAG, "Creating exit dialog"); AlertDialog.Builder alert = new AlertDialog.Builder(this); alert.setTitle("Quit"); alert.setMessage("Are you sure you want to exit?"); alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { finish(); } }); alert.setNegativeButton("No", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); alert.show(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.navigation, 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); } @Override public boolean onNavigationItemSelected(@NonNull MenuItem item) { // Handle navigation view item clicks here. int id = item.getItemId(); if (id == R.id.nav_camera) { // Everything after this point is actually my code. StringRequest req = new StringRequest(Request.Method.GET, UrlGenerator.getServerUrl(this) + "/api/user", new Response.Listener<String>() { @Override public void onResponse(String response) { TextView view = new TextView(getApplicationContext()); view.setText(response); FrameLayout layout = (FrameLayout) findViewById(R.id.navFrame); layout.removeAllViews(); layout.addView(view); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.v(TAG, "Connection error"); TextView view = new TextView(getApplicationContext()); view.setText(getResources().getString(R.string.error_connection)); FrameLayout layout = (FrameLayout) findViewById(R.id.navFrame); layout.removeAllViews(); layout.addView(view); NetworkResponse networkResponse = error.networkResponse; if (networkResponse != null && networkResponse.statusCode == HttpURLConnection.HTTP_UNAUTHORIZED) { Log.v(TAG, "Request was unauthorized, meaning that a new token is needed"); AccountManager manager = AccountManager.get(getApplicationContext()); manager.invalidateAuthToken(MusicPhpAccount.ACCOUNT_TYPE, getIntent().getStringExtra(AccountManager.KEY_AUTHTOKEN)); Intent intent = new Intent(NavigationActivity.this, MainActivity.class); startActivity(intent); } } }) { @Override public Map<String, String> getHeaders() throws AuthFailureError { Map<String, String> params = new HashMap<>(); params.put("Accept", "application/json"); params.put("Authorization", "Bearer " + getIntent().getStringExtra(AccountManager.KEY_AUTHTOKEN)); return params; } }; VolleySingleton.getInstance(this).addToRequestQueue(req); } else if (id == R.id.nav_gallery) { final Context context = this; getListing(Item.albums, 0, new VolleyCallback() { @Override public void onSuccess(JSONArray result) { Log.d(TAG, "Volley callback reached"); String albums[][] = new String[result.length()][3]; for (int i = 0; i < result.length(); i++) { try { JSONObject object = result.getJSONObject(i); albums[i][0] = object.getString("name"); albums[i][1] = object.getJSONObject("artist").getString("name"); albums[i][2] = object.getString("id"); } catch (Exception e) { e.printStackTrace(); } } AlbumListingAdapter adapter = new AlbumListingAdapter(context, albums, getIntent().getStringExtra(AccountManager.KEY_AUTHTOKEN)); GridView view = new GridView(context); view.setLayoutParams(new DrawerLayout.LayoutParams(ActionBar.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); view.setNumColumns(GridView.AUTO_FIT); view.setColumnWidth((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 148, getResources().getDisplayMetrics())); view.setStretchMode(GridView.STRETCH_SPACING_UNIFORM); view.setAdapter(adapter); view.setVerticalSpacing((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, getResources().getDisplayMetrics())); FrameLayout layout = (FrameLayout) findViewById(R.id.navFrame); layout.removeAllViews(); layout.addView(view); Log.d(TAG, "Adapter setup complete"); } }); } else if (id == R.id.nav_slideshow) { getListing(Item.artists, 0, new VolleyCallback() { @Override public void onSuccess(JSONArray result) { } }); } else if (id == R.id.nav_manage) { getListing(Item.tracks, 0, new VolleyCallback() { @Override public void onSuccess(JSONArray result) { } }); } else if (id == R.id.nav_share) { Log.d(TAG, "Queue contains " + queue.size() + " items. Displaying queue..."); ListView view = new ListView(this); view.setLayoutParams(new DrawerLayout.LayoutParams(ActionBar.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); String tracks[][] = new String[queue.size()][2]; for (int i = 0; i < queue.size(); i++) { MediaSessionCompat.QueueItem queueItem = queue.get(i); tracks[i][0] = queueItem.getDescription().getMediaId(); tracks[i][1] = (String) queueItem.getDescription().getTitle(); } AlbumAdapter adapter = new AlbumAdapter(this, tracks, getIntent().getStringExtra(AccountManager.KEY_AUTHTOKEN), this); view.setAdapter(adapter); view.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // String sAddress = getApplicationContext().getSharedPreferences("Prefs", 0).getString("server", null); // Bundle bundle = new Bundle(); // bundle.putString("Authorization", "Bearer " + token); // bundle.putString("Title", tracks[position][1]); // bundle.putString("art", getIntent().getStringExtra("art")); // bundle.putString("ID", tracks[position][0]); // MediaControllerCompat.getMediaController(AlbumActivity.this).getTransportControls().playFromUri(Uri.parse(sAddress + "/api/tracks/" + tracks[position][0] + "/audio"), bundle); } }); FrameLayout layout = (FrameLayout) findViewById(R.id.navFrame); layout.removeAllViews(); layout.addView(view); } else if (id == R.id.nav_send) { String sAddress = getSharedPreferences("Prefs", 0).getString("server", null); StringRequest request = new StringRequest(Request.Method.POST, sAddress + "/api/logout", new Response.Listener<String>() { @Override public void onResponse(String response) { try { JSONObject object = new JSONObject(response); if (object.getString("status").equals("OK")) { Log.v(TAG, "Logged out successfully. Now redirecting to MainActivity..."); AccountManager manager = AccountManager.get(getApplicationContext()); Account accounts[] = manager.getAccountsByType(MusicPhpAccount.ACCOUNT_TYPE); int account = 0; for (int i = 0; i < accounts.length; i++) { if (accounts[i].name.equals( getIntent().getStringExtra(AccountManager.KEY_ACCOUNT_NAME))) { account = i; break; } } final AccountManagerFuture future; if (Build.VERSION.SDK_INT >= 22) { future = manager.removeAccount(accounts[account], NavigationActivity.this, new AccountManagerCallback<Bundle>() { @Override public void run(AccountManagerFuture<Bundle> future) { } }, null); } else { future = manager.removeAccount(accounts[account], new AccountManagerCallback<Boolean>() { @Override public void run(AccountManagerFuture<Boolean> future) { } }, null); } AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() { @Override protected Void doInBackground(Void... params) { try { future.getResult(); Intent intent = new Intent(NavigationActivity.this, MainActivity.class); startActivity(intent); } catch (Exception e) { e.printStackTrace(); } return null; } }; task.execute(); } else { Log.v(TAG, "Issue with logging out..."); } } catch (JSONException e) { Log.e(TAG, "Issue with parsing JSON..."); e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e(TAG, "Error on logging out..."); } }) { @Override public Map<String, String> getHeaders() { Map<String, String> params = new HashMap<>(); params.put("Accept", "application/json"); params.put("Authorization", "Bearer " + getIntent().getStringExtra(AccountManager.KEY_AUTHTOKEN)); return params; } }; VolleySingleton.getInstance(this).addToRequestQueue(request); } DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); drawer.closeDrawer(GravityCompat.START); return true; } private enum Item { albums, artists, tracks } private void getListing(Item item, int id, final VolleyCallback callback) { String sAddress = getSharedPreferences("Prefs", 0).getString("server", null); StringRequest req = new StringRequest(Request.Method.GET, sAddress + "/api/" + item + "/" + (id == 0 ? "" : id), new Response.Listener<String>() { @Override public void onResponse(String response) { Log.d("Music.php-Android", "Server response: " + response); try { JSONArray array = new JSONArray(response); Log.d("Music.php-Android", "JSON contains " + String.valueOf(array.length()) + " objects"); callback.onSuccess(array); } catch (Exception e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.v(TAG, "failure"); } }) { @Override public Map<String, String> getHeaders() throws AuthFailureError { Map<String, String> params = new HashMap<>(); params.put("Accept", "application/json"); params.put("Authorization", "Bearer " + getIntent().getStringExtra(AccountManager.KEY_AUTHTOKEN)); return params; } }; VolleySingleton.getInstance(this).addToRequestQueue(req); } @Override public void onFragmentInteraction(Uri uri) { } interface VolleyCallback { void onSuccess(JSONArray result); } @Override public void onStart() { super.onStart(); mMediaBrowser.connect(); } @Override public void onStop() { super.onStop(); if (MediaControllerCompat.getMediaController(NavigationActivity.this) != null) { MediaControllerCompat.getMediaController(NavigationActivity.this) .unregisterCallback(controllerCallback); } mMediaBrowser.disconnect(); } private final MediaBrowserCompat.ConnectionCallback mConnectionCallback = new MediaBrowserCompat.ConnectionCallback() { @Override public void onConnected() { MediaSessionCompat.Token token = mMediaBrowser.getSessionToken(); try { MediaControllerCompat mediaController = new MediaControllerCompat(NavigationActivity.this, token); MediaControllerCompat.setMediaController(NavigationActivity.this, mediaController); queue = mediaController.getQueue(); mediaController.registerCallback(controllerCallback); } catch (RemoteException e) { e.printStackTrace(); } } @Override public void onConnectionSuspended() { } @Override public void onConnectionFailed() { } }; MediaControllerCompat.Callback controllerCallback = new MediaControllerCompat.Callback() { @Override public void onQueueChanged(List<MediaSessionCompat.QueueItem> newQueue) { queue = newQueue; } }; private int getCheckedItem(NavigationView navView) { Menu menu = navView.getMenu(); for (int i = 0; i < menu.size(); i++) { MenuItem item = menu.getItem(i); if (item.isChecked()) { return i; } } return 0; } @Override public void onDestroy() { super.onDestroy(); android.os.Process.killProcess(android.os.Process.myPid()); } }