android: actually implement a working(ish) file upload activity.

android/src/main/AndroidManifest.xml

@@ -3,6 +3,9 @@
       package="net.monarchpass.piecannon"
       android:versionCode="1"
       android:versionName="1.0">
+    
+    <uses-permission android:name="android.permission.INTERNET" />    
+    
     <application android:label="@string/app_name">
         <activity android:name=".Main"
                   android:label="@string/app_name">

android/src/main/java/net/monarchpass/piecannon/Send.java

@@ -4,18 +4,91 @@ import android.app.Activity;
 import android.os.Bundle;
 import android.content.Intent;
 import android.net.Uri;
+import android.widget.TextView;
+import android.content.ContentResolver;
+
+import com.google.common.io.ByteSource;
+
+import java.net.URI;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.io.PrintWriter;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ExecutionException;
+
+import lombok.AllArgsConstructor;
 
 public class Send extends Activity {
+    private final ExecutorService executor = Executors.newFixedThreadPool(1);
+
     @Override
     public void onCreate (final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_send);
         
         final Intent intent = getIntent();
         if (intent.hasExtra (Intent.EXTRA_STREAM)) {
             final Uri imageUri = intent.getParcelableExtra(Intent.EXTRA_STREAM);
             if (imageUri != null) {
-                // handle image
+                uploadImage(imageUri);
             }
         }
     }
+    
+    public void uploadImage (final Uri imageUri) {
+        // handle image
+        final TextView text = (TextView)findViewById(R.id.text);
+        text.setText(imageUri.toString());
+        
+        final ContentResolver resolver = getContentResolver();
+        final String type = resolver.getType(imageUri);
+        String extension;
+
+        if ("image/gif".equals(type)) {
+            extension = ".gif";
+        } else if ("image/png".equals(type)) {
+            extension = ".png";
+        } else {
+            extension = ".jpg";
+        }
+        
+        final String fileName = imageUri.getLastPathSegment() + extension;
+        final Server testServer = new TestServer();
+        
+        try
+        {
+            final URI uploaded = executor.submit(() -> testServer.upload(fileName, new ContentByteSource(resolver, imageUri)))
+                .get();
+            text.setText(uploaded.toString());
+            shareUploadUrl(uploaded);
+        }
+        catch (final InterruptedException | ExecutionException exception) {
+            final StringWriter buf = new StringWriter();
+            final PrintWriter out = new PrintWriter(buf);
+            out.println("in: " + imageUri + " -> " + fileName);
+            exception.printStackTrace(out);
+            text.setText(buf.toString());
+        }
+    }
+    
+    public void shareUploadUrl (final URI uploadedUrl) {
+        final Intent sharingIntent = new Intent(Intent.ACTION_SEND);
+        sharingIntent.setType("text/plain");
+        sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, uploadedUrl.toString());
+        startActivity(Intent.createChooser(sharingIntent, "Share uploaded url"));
+    }
+    
+    @AllArgsConstructor
+    public static class ContentByteSource extends ByteSource {
+        private final ContentResolver resolver;
+        private final Uri contentUri;
+    
+        @Override
+        public InputStream openStream () throws IOException
+        {
+            return resolver.openInputStream(contentUri);
+        }
+    }
 }