podlite/src/com/miniabs/BaseActivity.java

package com.miniabs;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Handler;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

/** Shared bits: the mini player bar, a 1-second UI tick, sign-in errors and episode actions. */
abstract class BaseActivity extends Activity {
    protected final Handler handler = new Handler();
    private boolean ticking;

    private View mini;
    private TextView miniTitle, miniSub;
    private ImageButton miniPlay;
    private ProgressBar miniProgress;

    private final Runnable ticker = new Runnable() {
        public void run() {
            onTick();
            if (ticking) handler.postDelayed(this, 1000);
        }
    };

    @Override
    protected void onResume() {
        super.onResume();
        ticking = true;
        handler.post(ticker);
    }

    @Override
    protected void onPause() {
        ticking = false;
        handler.removeCallbacks(ticker);
        super.onPause();
    }

    protected void onTick() {
        updateMiniBar();
    }

    protected void toast(String s) {
        Toast.makeText(this, s, s.length() > 60 ? Toast.LENGTH_LONG : Toast.LENGTH_SHORT).show();
    }

    /** Shows an error; sends the user to the login screen if their sign-in expired. */
    protected void showError(Exception e) {
        if (e instanceof Api.AuthException) {
            Prefs.get(this).logout();
            App.clear();
            HomeActivity.clearCache();
            startActivity(new Intent(this, LoginActivity.class)
                    .putExtra("message", e.getMessage())
                    .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
            finish();
            return;
        }
        if (offerTrust(null)) return;
        toast(Util.describe(e));
    }

    /** If a request just failed on an unrecognised certificate, ask about it. retry runs after trusting. */
    protected boolean offerTrust(final Runnable retry) {
        return TrustPrompt.offer(this, new Runnable() {
            public void run() {
                if (retry != null) retry.run();
                else toast("Certificado aceptado. Téntao de novo.");
            }
        });
    }

    // ------------------------------------------------------------ mini player

    protected void setupMiniBar() {
        mini = findViewById(R.id.mini_bar);
        if (mini == null) return;
        miniTitle = (TextView) findViewById(R.id.mini_title);
        miniSub = (TextView) findViewById(R.id.mini_sub);
        miniPlay = (ImageButton) findViewById(R.id.mini_play);
        miniProgress = (ProgressBar) findViewById(R.id.mini_progress);
        findViewById(R.id.mini_info).setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                startActivity(new Intent(BaseActivity.this, PlayerActivity.class));
            }
        });
        miniPlay.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                PlayerService ps = PlayerService.get();
                if (ps != null && ps.episode() != null) {
                    PlayerService.send(BaseActivity.this, PlayerService.A_TOGGLE);
                } else {
                    Episode last = Prefs.get(BaseActivity.this).lastEpisode();
                    if (last != null) PlayerService.play(BaseActivity.this, last);
                }
                handler.postDelayed(new Runnable() {
                    public void run() {
                        updateMiniBar();
                    }
                }, 300);
            }
        });
    }

    protected void updateMiniBar() {
        if (mini == null) return;
        PlayerService ps = PlayerService.get();
        Episode e = ps != null ? ps.episode() : null;
        if (e == null) e = Prefs.get(this).lastEpisode();
        if (e == null) {
            mini.setVisibility(View.GONE);
            return;
        }
        mini.setVisibility(View.VISIBLE);
        miniTitle.setText(e.title);
        boolean playing = ps != null && ps.episode() != null && ps.isPlaying();
        miniPlay.setImageResource(playing ? R.drawable.ic_pause_small : R.drawable.ic_play_small);
        int pos, dur;
        String sub;
        if (ps != null && ps.episode() != null) {
            pos = ps.positionMs();
            dur = ps.durationMs();
            int st = ps.state();
            if (st == PlayerService.LOADING || st == PlayerService.ERROR) sub = ps.status();
            else sub = Util.join(e.show, dur > 0 ? "quedan " + Util.clock(dur - pos) : "");
        } else {
            double[] p = App.progress(e.id);
            double cur = p != null ? p[0] : Math.max(0, App.localPosition(this, e.id));
            pos = (int) (cur * 1000);
            dur = (int) (e.duration * 1000);
            sub = Util.join(e.show, "En pausa");
        }
        miniSub.setText(sub);
        miniProgress.setProgress(dur > 0 ? (int) (1000L * pos / dur) : 0);
    }

    // ------------------------------------------------------------ episode actions

    protected static final int M_PLAY = 1, M_DOWNLOAD = 2, M_DELETE = 3, M_PLAYED = 4, M_UNPLAYED = 5,
            M_SHOW = 6, M_CANCEL = 7;

    protected void episodeMenu(ContextMenu menu, Episode e, boolean offerShow) {
        menu.setHeaderTitle(e.title);
        menu.add(0, M_PLAY, 0, "Reproducir");
        if (DownloadService.busyWith(e.id)) menu.add(0, M_CANCEL, 0, "Cancelar descarga");
        else if (Downloads.has(this, e.id)) menu.add(0, M_DELETE, 0, "Eliminar descarga");
        else menu.add(0, M_DOWNLOAD, 0, "Descargar");
        double[] p = App.progress(e.id);
        if (p != null && p[2] > 0) menu.add(0, M_UNPLAYED, 0, "Marcar como non escoitado");
        else menu.add(0, M_PLAYED, 0, "Marcar como escoitado");
        if (offerShow) menu.add(0, M_SHOW, 0, "Ir ao programa");
    }

    /** Returns true if handled. onChanged runs on the UI thread after the list should refresh. */
    protected boolean episodeAction(int id, final Episode e, final Runnable onChanged) {
        switch (id) {
            case M_PLAY:
                playEpisode(e);
                return true;
            case M_DOWNLOAD:
                if (Prefs.get(this).wifiOnly() && !Util.onWifi(this)) {
                    new AlertDialog.Builder(this)
                            .setMessage("Non estás nunha wifi. Descargar con datos móbiles esta vez?")
                            .setPositiveButton("Descargar", new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface d, int w) {
                                    Prefs.get(BaseActivity.this).sp.edit().putBoolean("wifi_only", false).commit();
                                    DownloadService.enqueue(BaseActivity.this, e);
                                    toast("Descargando. Desactivouse «só con wifi» (podes cambialo en Axustes).");
                                    if (onChanged != null) onChanged.run();
                                }
                            })
                            .setNegativeButton("Cancelar", null)
                            .show();
                } else {
                    DownloadService.enqueue(this, e);
                    toast("Descargando…");
                }
                if (onChanged != null) onChanged.run();
                return true;
            case M_CANCEL:
                DownloadService.cancel(e.id);
                toast("Descarga cancelada");
                if (onChanged != null) onChanged.run();
                return true;
            case M_DELETE:
                PlayerService ps = PlayerService.get();
                if (ps != null && ps.episode() != null && ps.episode().id.equals(e.id) && ps.isLocal()) {
                    ps.stop();
                }
                Downloads.delete(this, e);
                toast("Descarga eliminada");
                if (onChanged != null) onChanged.run();
                return true;
            case M_PLAYED:
            case M_UNPLAYED:
                setPlayed(e, id == M_PLAYED, onChanged);
                return true;
            case M_SHOW:
                startActivity(new Intent(this, PodcastActivity.class)
                        .putExtra("itemId", e.itemId).putExtra("title", e.show));
                return true;
            default:
                return false;
        }
    }

    protected void playEpisode(Episode e) {
        PlayerService.play(this, e);
        startActivity(new Intent(this, PlayerActivity.class).putExtra("ep", e.toJson().toString()));
    }

    private void setPlayed(final Episode e, final boolean played, final Runnable onChanged) {
        final double dur = e.duration;
        final double[] before = App.progress(e.id);
        App.setProgress(e.id, played ? dur : 0, dur, played);
        if (onChanged != null) onChanged.run();
        new Job<Void>() {
            Void work() throws Exception {
                Api.setProgress(BaseActivity.this, e.itemId, e.id, played ? dur : 0, dur, Boolean.valueOf(played));
                App.forgetLocal(BaseActivity.this, e.id);
                return null;
            }

            void done(Void r) {
                toast(played ? "Marcado como escoitado" : "Marcado como non escoitado");
            }

            void failed(Exception ex) {
                if (before != null) App.setProgress(e.id, before[0], before[1], before[2] > 0);
                else App.setProgress(e.id, 0, dur, false);
                if (onChanged != null) onChanged.run();
                showError(ex);
            }
        }.start();
    }

    protected boolean onEpisodeContextItem(MenuItem item, Episode e, Runnable onChanged) {
        return e != null && episodeAction(item.getItemId(), e, onChanged);
    }
}