tempus/app/src/main/java/com/cappielloantonio/tempo/widget/WidgetProvider.java

package com.cappielloantonio.tempo.widget;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.text.TextUtils;
import android.widget.RemoteViews;

import com.cappielloantonio.tempo.R;

import android.app.TaskStackBuilder;

import com.cappielloantonio.tempo.ui.activity.MainActivity;

import android.util.Log;

import androidx.annotation.Nullable;

public class WidgetProvider extends AppWidgetProvider {
    private static final String TAG = "TempoWidget";
    public static final String ACT_PLAY_PAUSE = "tempo.widget.PLAY_PAUSE";
    public static final String ACT_NEXT = "tempo.widget.NEXT";
    public static final String ACT_PREV = "tempo.widget.PREV";
    public static final String ACT_TOGGLE_SHUFFLE = "tempo.widget.SHUFFLE";
    public static final String ACT_CYCLE_REPEAT = "tempo.widget.REPEAT";

    @Override
    public void onUpdate(Context ctx, AppWidgetManager mgr, int[] ids) {
        for (int id : ids) {
            RemoteViews rv = WidgetUpdateManager.chooseBuild(ctx, id);
            attachIntents(ctx, rv, id, null, null, null);
            mgr.updateAppWidget(id, rv);
        }
    }

    @Override
    public void onReceive(Context ctx, Intent intent) {
        super.onReceive(ctx, intent);
        String a = intent.getAction();
        Log.d(TAG, "onReceive action=" + a);
        if (ACT_PLAY_PAUSE.equals(a) || ACT_NEXT.equals(a) || ACT_PREV.equals(a)
                || ACT_TOGGLE_SHUFFLE.equals(a) || ACT_CYCLE_REPEAT.equals(a)) {
            WidgetActions.dispatchToMediaSession(ctx, a);
        } else if (AppWidgetManager.ACTION_APPWIDGET_UPDATE.equals(a)) {
            WidgetUpdateManager.refreshFromController(ctx);
        }
    }

    @Override
    public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId, android.os.Bundle newOptions) {
        super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId, newOptions);
        RemoteViews rv = WidgetUpdateManager.chooseBuild(context, appWidgetId);
        attachIntents(context, rv, appWidgetId, null, null, null);
        appWidgetManager.updateAppWidget(appWidgetId, rv);
        WidgetUpdateManager.refreshFromController(context);
    }

    public static void attachIntents(Context ctx, RemoteViews rv) {
        attachIntents(ctx, rv, 0, null, null, null);
    }

    public static void attachIntents(Context ctx, RemoteViews rv, int requestCodeBase) {
        attachIntents(ctx, rv, requestCodeBase, null, null, null);
    }

    public static void attachIntents(Context ctx, RemoteViews rv, int requestCodeBase,
                                     String songLink,
                                     String albumLink,
                                     String artistLink) {
        PendingIntent playPause = PendingIntent.getBroadcast(
                ctx,
                requestCodeBase + 0,
                new Intent(ctx, WidgetProvider4x1.class).setAction(ACT_PLAY_PAUSE),
                PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT
        );
        PendingIntent next = PendingIntent.getBroadcast(
                ctx,
                requestCodeBase + 1,
                new Intent(ctx, WidgetProvider4x1.class).setAction(ACT_NEXT),
                PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT
        );
        PendingIntent prev = PendingIntent.getBroadcast(
                ctx,
                requestCodeBase + 2,
                new Intent(ctx, WidgetProvider4x1.class).setAction(ACT_PREV),
                PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT
        );
        PendingIntent shuffle = PendingIntent.getBroadcast(
                ctx,
                requestCodeBase + 3,
                new Intent(ctx, WidgetProvider4x1.class).setAction(ACT_TOGGLE_SHUFFLE),
                PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT
        );
        PendingIntent repeat = PendingIntent.getBroadcast(
                ctx,
                requestCodeBase + 4,
                new Intent(ctx, WidgetProvider4x1.class).setAction(ACT_CYCLE_REPEAT),
                PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT
        );

        rv.setOnClickPendingIntent(R.id.btn_play_pause, playPause);
        rv.setOnClickPendingIntent(R.id.btn_next, next);
        rv.setOnClickPendingIntent(R.id.btn_prev, prev);
        rv.setOnClickPendingIntent(R.id.btn_shuffle, shuffle);
        rv.setOnClickPendingIntent(R.id.btn_repeat, repeat);

        PendingIntent launch = buildMainActivityPendingIntent(ctx, requestCodeBase + 10, null);
        rv.setOnClickPendingIntent(R.id.root, launch);

        PendingIntent songPending = buildMainActivityPendingIntent(ctx, requestCodeBase + 20, songLink);
        PendingIntent artistPending = buildMainActivityPendingIntent(ctx, requestCodeBase + 21, artistLink);
        PendingIntent albumPending = buildMainActivityPendingIntent(ctx, requestCodeBase + 22, albumLink);

        PendingIntent fallback = launch;
        rv.setOnClickPendingIntent(R.id.album_art, songPending != null ? songPending : fallback);
        rv.setOnClickPendingIntent(R.id.title, songPending != null ? songPending : fallback);
        rv.setOnClickPendingIntent(R.id.subtitle,
                artistPending != null ? artistPending : (songPending != null ? songPending : fallback));
        rv.setOnClickPendingIntent(R.id.album, albumPending != null ? albumPending : fallback);
    }

    private static PendingIntent buildMainActivityPendingIntent(Context ctx, int requestCode, @Nullable String link) {
        Intent intent;
        if (!TextUtils.isEmpty(link)) {
            intent = new Intent(Intent.ACTION_VIEW, Uri.parse(link), ctx, MainActivity.class);
        } else {
            intent = new Intent(ctx, MainActivity.class);
        }
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(ctx);
        stackBuilder.addNextIntentWithParentStack(intent);
        return stackBuilder.getPendingIntent(requestCode, PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT);
    }
}