Add more logic and metadata object.

app/src/main/java/de/trac/spherical/MainActivity.java

@@ -8,7 +8,6 @@ import android.util.Log;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
@@ -18,7 +17,9 @@ import de.trac.spherical.parser.SphereParser;
 public class MainActivity extends AppCompatActivity {
 
     public static final String TAG = "Spherical";
-    public static final String INTENT_SPHERE = "application/vnd.google.panorama360+jpg";
+
+    public static final String MIME_PHOTO_SPHERE = "application/vnd.google.panorama360+jpg";
+    public static final String MIME_IMAGE = "image/*";
 
     private TextView text;
 
@@ -26,41 +27,81 @@ public class MainActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        //TODO: Remove later
         text = (TextView) findViewById(R.id.hello_world);
 
-        Log.d(TAG, "STARTING");
         Intent intent = getIntent();
-        Log.d(TAG, "Intent: " + intent.getAction() + " " + intent.getType());
-
         switch (intent.getAction()) {
+            //Image was sent into the app
             case Intent.ACTION_SEND:
-                handleSentImage(intent);
+                handleSentImageIntent(intent);
                 break;
 
+            //App was launched via launcher icon
+            //TODO: Remove later together with launcher intent filter
             default:
                 Toast.makeText(this, R.string.prompt_share_image, Toast.LENGTH_LONG).show();
         }
     }
 
-    private void handleSentImage(Intent intent) {
+    /**
+     * Distinguish type of sent image. Images with the MIME type of a photosphere will be directly
+     * displayed, while images with MIME type image/* are being manually tested using {@link SphereParser}.
+     * @param intent incoming intent.
+     */
+    private void handleSentImageIntent(Intent intent) {
         String type = intent.getType();
         if (type != null) {
-            switch (type) {
+
-                case INTENT_SPHERE:
             Uri imageUri = intent.getParcelableExtra(Intent.EXTRA_STREAM);
-                    if (imageUri != null) {
+            if (imageUri == null) {
-                        showImage(imageUri);
+                Toast.makeText(this, R.string.file_not_found, Toast.LENGTH_SHORT).show();
+                return;
             }
 
-                Toast.makeText(this, R.string.wow, Toast.LENGTH_LONG).show();
+            switch (type) {
+                case MIME_PHOTO_SPHERE:
+                    displayPhotoSphere(imageUri);
+                    break;
+
+                case MIME_IMAGE:
+                    displayMaybePhotoSphere(imageUri);
                     break;
             }
+
         } else {
-            Toast.makeText(this, "LOL", Toast.LENGTH_SHORT).show();
+            Toast.makeText(this, "TODO: Figure out what to do :D", Toast.LENGTH_SHORT).show();
         }
     }
 
-    private void showImage(Uri uri) {
+    /**
+     * Check, whether the sent photo is a photo sphere and display either a sphere, or a plain image.
+     * @param uri
+     */
+    private void displayMaybePhotoSphere(Uri uri) {
+        try {
+            InputStream inputStream = getContentResolver().openInputStream(uri);
+            String xml = SphereParser.getXMLContent(inputStream);
+
+            boolean sphere = true; //TODO: parser.
+
+            if (sphere) {
+                displayPhotoSphere(uri);
+            } else {
+                displayFlatImage(uri);
+            }
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * Display a photo sphere.
+     * @param uri
+     */
+    private void displayPhotoSphere(Uri uri) {
         try {
             InputStream inputStream = getContentResolver().openInputStream(uri);
             String xml = SphereParser.getXMLContent(inputStream);
@@ -79,4 +120,12 @@ public class MainActivity extends AppCompatActivity {
             Toast.makeText(this, R.string.ioerror, Toast.LENGTH_SHORT).show();
         }
     }
+
+    /**
+     * Display a flat image.
+     * @param uri
+     */
+    private void displayFlatImage(Uri uri) {
+
+    }
 }

app/src/main/java/de/trac/spherical/parser/PhotoSphereMetadata.java

@@ -0,0 +1,31 @@
+package de.trac.spherical.parser;
+
+/**
+ * Created by vanitas on 12.09.17.
+ */
+
+public class PhotoSphereMetadata {
+
+    public static final String USE_PANORAMA_VIEWER = "GPano:UsePanoramaViewer";
+    public static final String CAPTURE_SOFTWARE = "GPano:CaptureSoftware";
+    public static final String STITCHING_SOFTWARE = "GPano:StitchingSoftware";
+    public static final String PROJECTION_TYPE = "GPano:ProjectionType";
+    public static final String POSE_HEADING_DEGREES = "GPano:PoseHeadingDegrees";
+    public static final String POSE_PITCH_DEGREES = "GPano:PosePitchDegrees";
+    public static final String POSE_ROLL_DEGREES = "GPano:PoseRollDegrees";
+    public static final String INITIAL_VIEW_HEADING_DEGREES = "GPano:InitialViewHeadingDegrees";
+    public static final String INITIAL_VIEW_PITCH_DEGREES = "GPano:InitialViewPitchDegrees";
+    public static final String INITIAL_VIEW_ROLL_DEGREES = "GPano:InitialViewRollDegrees";
+    public static final String INITIAL_HORIZONTAL_POV_DEGREES = "GPano:InitialHorizontalFOVDegrees";
+    public static final String FIRST_PHOTO_DATE = "GPano:FirstPhotoDate";
+    public static final String LAST_PHOTO_DATE = "GPano:LastPhotoDate";
+    public static final String SOURCE_PHOTOS_COUNT = "GPano:SourcePhotosCount";
+    public static final String EXPOSURE_LOCK_USED = "GPano:ExposureLockUsed";
+    public static final String CROPPED_AREA_IMAGE_WIDTH_PIXELS = "GPano:CroppedAreaImageWidthPixels";
+    public static final String CROPPED_AREA_IMAGE_HEIGHT_PIXELS = "GPano:CroppedAreaImageHeightPixels";
+    public static final String FULL_PANO_WIDTH_PIXELS = "GPano:FullPanoWidthPixels";
+    public static final String FULL_PANO_HEIGHT_PIXELS = "GPano:FullPanoHeightPixels";
+    public static final String CROPPED_AREA_LEFT_PIXELS = "GPano:CroppedAreaLeftPixels";
+    public static final String CROPPED_AREA_TOP_PIXELS = "GPano:CroppedAreaTopPixels";
+    public static final String INITIAL_CAMERA_DOLLY = "GPano:InitialCameraDolly";
+}

app/src/main/java/de/trac/spherical/parser/SphereParser.java

@@ -108,7 +108,7 @@ public class SphereParser {
         }
     }
 
-    public static void append(ArrayList<Byte> list, byte[] array, int r) {
+    private static void append(ArrayList<Byte> list, byte[] array, int r) {
         for (int i = 0; i < r; i++) {
             list.add(array[i]);
         }