Pebble: various preparations for FW 3.x support

- Implement encodeAppStart() for FW 3.x
- List cached PBWs in AppManager (currently only UUID)

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/AppManagerActivity.java

@@ -5,7 +5,9 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.support.v4.app.NavUtils;
 import android.support.v4.content.LocalBroadcastManager;
 import android.view.ContextMenu;
@@ -17,14 +19,18 @@ import android.widget.ListView;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.File;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
 
-import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceApp;
+import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.adapter.GBDeviceAppAdapter;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceApp;
 import nodomain.freeyourgadget.gadgetbridge.service.DeviceCommunicationService;
+import nodomain.freeyourgadget.gadgetbridge.util.FileUtils;
 
 
 public class AppManagerActivity extends Activity {
@@ -49,6 +55,15 @@ public class AppManagerActivity extends Activity {
 
                     appList.add(new GBDeviceApp(uuid, appName, appCreator, "", appType));
                 }
+
+                SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(GBApplication.getContext());
+
+                if (sharedPrefs.getBoolean("pebble_force_untested", false)) {
+                    List<GBDeviceApp> cachedApps = getCachedApps();
+                    for (GBDeviceApp app : cachedApps) {
+                        appList.add(app);
+                    }
+                }
                 mGBDeviceAppAdapter.notifyDataSetChanged();
             }
         }
@@ -57,6 +72,23 @@ public class AppManagerActivity extends Activity {
     private GBDeviceAppAdapter mGBDeviceAppAdapter;
     private GBDeviceApp selectedApp = null;
 
+    private List<GBDeviceApp> getCachedApps() {
+        List<GBDeviceApp> cachedAppList = new ArrayList<>();
+        try {
+            File cachePath = new File(FileUtils.getExternalFilesDir().getPath() + "/pbw-cache");
+            File files[] = cachePath.listFiles();
+            for (File file : files) {
+                if (file.getName().endsWith(".pbw")) {
+                    UUID uuid = UUID.fromString(file.getName().substring(0, file.getName().length() - 4));
+                    cachedAppList.add(new GBDeviceApp(uuid, uuid.toString(), "N/A", "", GBDeviceApp.Type.UNKNOWN));
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return cachedAppList;
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/PebbleProtocol.java

@@ -38,6 +38,7 @@ public class PebbleProtocol extends GBDeviceProtocol {
     static final short ENDPOINT_PHONECONTROL = 33;
     static final short ENDPOINT_APPLICATIONMESSAGE = 48;
     static final short ENDPOINT_LAUNCHER = 49;
+    static final short ENDPOINT_APPRUNSTATE = 52;
     static final short ENDPOINT_LOGS = 2000;
     static final short ENDPOINT_PING = 2001;
     static final short ENDPOINT_LOGDUMP = 2002;
@@ -58,6 +59,8 @@ public class PebbleProtocol extends GBDeviceProtocol {
     static final short ENDPOINT_BLOBDB = (short) 45531;  // 3.x only
     static final short ENDPOINT_PUTBYTES = (short) 48879;
 
+    static final byte APPRUNSTATE_START = 1;
+
     static final byte NOTIFICATION_EMAIL = 0;
     static final byte NOTIFICATION_SMS = 1;
     static final byte NOTIFICATION_TWITTER = 2;
@@ -161,18 +164,20 @@ public class PebbleProtocol extends GBDeviceProtocol {
     static final byte TYPE_INT32 = 3;
 
     static final short LENGTH_PREFIX = 4;
-    static final short LENGTH_PING = 5;
     static final short LENGTH_SIMPLEMESSAGE = 1;
-    static final short LENGTH_SETTIME = 5;
+
+    static final short LENGTH_APPRUNSTATE = 17;
+    static final short LENGTH_PING = 5;
+    static final short LENGTH_PHONEVERSION = 17;
     static final short LENGTH_REMOVEAPP = 17;
     static final short LENGTH_REFRESHAPP = 5;
-    static final short LENGTH_PHONEVERSION = 17;
+    static final short LENGTH_SETTIME = 5;
+    static final short LENGTH_SYSTEMMESSAGE = 2;
     static final short LENGTH_UPLOADSTART = 7;
     static final short LENGTH_UPLOADCHUNK = 9;
     static final short LENGTH_UPLOADCOMMIT = 9;
     static final short LENGTH_UPLOADCOMPLETE = 5;
     static final short LENGTH_UPLOADCANCEL = 5;
-    static final short LENGTH_SYSTEMMESSAGE = 2;
 
     private static final String[] hwRevisions = {"unknown", "ev1", "ev2", "ev2_3", "ev2_4", "v1_5", "v2_0", "evt2", "dvt"};
     private static Random mRandom = new Random();
@@ -509,10 +514,21 @@ public class PebbleProtocol extends GBDeviceProtocol {
 
     @Override
     public byte[] encodeAppStart(UUID uuid) {
+        if (isFw3x) {
+            ByteBuffer buf = ByteBuffer.allocate(LENGTH_PREFIX + LENGTH_APPRUNSTATE);
+            buf.order(ByteOrder.BIG_ENDIAN);
+            buf.putShort(LENGTH_APPRUNSTATE);
+            buf.putShort(ENDPOINT_APPRUNSTATE);
+            buf.put(APPRUNSTATE_START);
+            buf.putLong(uuid.getMostSignificantBits());
+            buf.putLong(uuid.getLeastSignificantBits());
+            return buf.array();
+        } else {
             ArrayList<Pair<Integer, Object>> pairs = new ArrayList<>();
             pairs.add(new Pair<>(1, (Object) 1)); // launch
             return encodeApplicationMessagePush(ENDPOINT_LAUNCHER, uuid, pairs);
         }
+    }
 
     @Override
     public byte[] encodeAppDelete(UUID uuid) {