Add widget feature

app/src/main/AndroidManifest.xml

@@ -57,6 +57,18 @@
             android:name=".activities.InterestsActivity"
             android:theme="@style/Theme.Capture.NoActionBar" />
 
+        <!-- App Widget Provider -->
+        <receiver
+            android:name=".widget.LatestPostWidget"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/latest_post_widget_info" />
+        </receiver>
+
         <!-- FileProvider for camera access -->
         <provider
             android:name="androidx.core.content.FileProvider"

app/src/main/java/com/pineapple/capture/fragment/CameraFragment.java

@@ -1,5 +1,6 @@
 package com.pineapple.capture.fragment;
 
+import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -51,6 +52,9 @@
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
 
+import android.appwidget.AppWidgetManager;
+import android.content.ComponentName;
+
 public class CameraFragment extends Fragment {
 
     private PreviewView previewView;
@@ -379,10 +383,15 @@ private void savePostToFirestore(String imageUrl, String content) {
                     FirebaseFirestore.getInstance().collection("posts")
                         .add(postData)
                         .addOnSuccessListener(documentReference -> {
+                            // Success - post created and image uploaded
                             String postId = documentReference.getId();
                             Log.d("CameraFragment", "Post saved with ID: " + postId);
                             Toast.makeText(requireContext(), "Post uploaded successfully!", Toast.LENGTH_SHORT).show();
 
+                            // Update the home screen widget
+                            updateWidget();
+
+                            // For testing: verify the post was saved by reading it back
                             FirebaseFirestore.getInstance().collection("posts").document(postId)
                                 .get()
                                 .addOnSuccessListener(postSnapshot -> {
@@ -463,4 +472,24 @@ private void resetCameraAfterPost() {
             }
         }
     }
+
+    /**
+     * Update the home screen widget with the latest post
+     */
+    private void updateWidget() {
+        Intent intent = new Intent(requireContext(), com.pineapple.capture.widget.LatestPostWidget.class);
+        intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
+
+        // Use AppWidgetManager to get the widget IDs
+        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(requireContext());
+        int[] appWidgetIds = appWidgetManager.getAppWidgetIds(
+                new ComponentName(requireContext(), com.pineapple.capture.widget.LatestPostWidget.class));
+
+        // Add widget IDs to the intent
+        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
+
+        // Send broadcast to update widgets
+        requireContext().sendBroadcast(intent);
+        Log.d("CameraFragment", "Widget update broadcast sent");
+    }
 }

app/src/main/java/com/pineapple/capture/widget/LatestPostWidget.java

@@ -0,0 +1,177 @@
+package com.pineapple.capture.widget;
+
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+import android.view.View;
+import android.widget.RemoteViews;
+import android.os.Bundle;
+
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.request.target.AppWidgetTarget;
+import com.bumptech.glide.request.transition.Transition;
+import com.google.firebase.auth.FirebaseAuth;
+import com.google.firebase.firestore.FirebaseFirestore;
+import com.google.firebase.firestore.Query;
+import com.google.firebase.firestore.QueryDocumentSnapshot;
+import com.pineapple.capture.MainActivity;
+import com.pineapple.capture.R;
+import com.pineapple.capture.feed.FeedItem;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class LatestPostWidget extends AppWidgetProvider {
+
+    private static final String TAG = "LatestPostWidget";
+
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        // There may be multiple widgets active, so update all of them
+        for (int appWidgetId : appWidgetIds) {
+            updateAppWidget(context, appWidgetManager, appWidgetId);
+        }
+    }
+
+    private void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {
+        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_latest_post);
+
+        // Show loading state - hide post views, show empty view with loading text
+        views.setViewVisibility(R.id.widget_empty_view, View.VISIBLE);
+        views.setTextViewText(R.id.widget_empty_view, "Loading...");
+
+        // Set up click intent for the widget
+        Intent intent = new Intent(context, MainActivity.class);
+        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_IMMUTABLE);
+        views.setOnClickPendingIntent(R.id.widget_post_image, pendingIntent);
+
+        // Update the widget initially with loading state
+        appWidgetManager.updateAppWidget(appWidgetId, views);
+
+        // Fetch the latest post from Firestore
+        FirebaseFirestore db = FirebaseFirestore.getInstance();
+        db.collection("posts")
+            .orderBy("timestamp", Query.Direction.DESCENDING)
+            .limit(1)
+            .get()
+            .addOnSuccessListener(queryDocumentSnapshots -> {
+                if (!queryDocumentSnapshots.isEmpty()) {
+                    for (QueryDocumentSnapshot document : queryDocumentSnapshots) {
+                        FeedItem latestPost = document.toObject(FeedItem.class);
+                        latestPost.setId(document.getId());
+
+                        // Update widget with post data
+                        updateWidgetWithPost(context, appWidgetManager, appWidgetId, latestPost);
+                        return;
+                    }
+                } else {
+                    // No posts found
+                    views.setViewVisibility(R.id.widget_empty_view, View.VISIBLE);
+                    views.setTextViewText(R.id.widget_empty_view, "No posts available");
+                    appWidgetManager.updateAppWidget(appWidgetId, views);
+                }
+            })
+            .addOnFailureListener(e -> {
+                Log.e(TAG, "Error fetching latest post", e);
+                views.setViewVisibility(R.id.widget_empty_view, View.VISIBLE);
+                views.setTextViewText(R.id.widget_empty_view, "Error loading post");
+                appWidgetManager.updateAppWidget(appWidgetId, views);
+            });
+    }
+
+    private void updateWidgetWithPost(Context context, AppWidgetManager appWidgetManager, 
+                                    int appWidgetId, FeedItem post) {
+        // Create a RemoteViews object
+        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_latest_post);
+
+        // Hide empty view
+        views.setViewVisibility(R.id.widget_empty_view, View.GONE);
+
+        // Set caption
+        if (post.getContent() != null && !post.getContent().isEmpty()) {
+            views.setTextViewText(R.id.widget_post_caption, post.getContent());
+            views.setViewVisibility(R.id.widget_post_caption, View.VISIBLE);
+        } else {
+            views.setViewVisibility(R.id.widget_post_caption, View.GONE);
+        }
+
+        // Set username
+        views.setTextViewText(R.id.widget_username, post.getUsername() != null ? 
+                post.getUsername() : "Anonymous");
+
+        // Set up click intent to open the app
+        Intent intent = new Intent(context, MainActivity.class);
+        intent.putExtra("post_id", post.getId());
+        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_IMMUTABLE);
+        views.setOnClickPendingIntent(R.id.widget_post_image, pendingIntent);
+
+        // First update with what we have (without images)
+        appWidgetManager.updateAppWidget(appWidgetId, views);
+
+        // Load images in background thread
+        ExecutorService executor = Executors.newSingleThreadExecutor();
+        Handler handler = new Handler(Looper.getMainLooper());
+
+        executor.execute(() -> {
+            try {
+                // Load post image with Glide in background thread
+                if (post.getImageUrl() != null && !post.getImageUrl().isEmpty()) {
+                    try {
+                        Bitmap bitmap = Glide.with(context.getApplicationContext())
+                                .asBitmap()
+                                .load(post.getImageUrl())
+                                .submit(400, 400)  // Limit size to prevent OOM
+                                .get();
+
+                        views.setImageViewBitmap(R.id.widget_post_image, bitmap);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Error loading post image", e);
+                    }
+                }
+
+                // Load user avatar with Glide in background thread
+                if (post.getProfilePictureUrl() != null && !post.getProfilePictureUrl().isEmpty()) {
+                    try {
+                        Bitmap avatarBitmap = Glide.with(context.getApplicationContext())
+                                .asBitmap()
+                                .load(post.getProfilePictureUrl())
+                                .circleCrop()
+                                .submit(80, 80)  // Small size for avatar
+                                .get();
+
+                        views.setImageViewBitmap(R.id.widget_user_avatar, avatarBitmap);
+                    } catch (Exception e) {
+                        Log.e(TAG, "Error loading avatar image", e);
+                    }
+                }
+
+                // Update widget with images on main thread
+                handler.post(() -> {
+                    appWidgetManager.updateAppWidget(appWidgetId, views);
+                });
+            } catch (Exception e) {
+                Log.e(TAG, "Error in background loading", e);
+            }
+        });
+    }
+
+    @Override
+    public void onEnabled(Context context) {
+        // Called when the first widget is created
+    }
+
+    @Override
+    public void onDisabled(Context context) {
+        // Called when the last widget is disabled
+
+        // Shutdown the executor service if needed
+    }
+} 

app/src/main/res/drawable/widget_background.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="#333333" />
+    <corners android:radius="12dp" />
+</shape> 

app/src/main/res/drawable/widget_preview.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Background -->
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="#333333" />
+            <corners android:radius="12dp" />
+        </shape>
+    </item>
+
+    <!-- Post image placeholder -->
+    <item android:top="8dp" android:left="8dp" android:right="8dp" android:bottom="40dp">
+        <shape android:shape="rectangle">
+            <solid android:color="#888888" />
+        </shape>
+    </item>
+
+    <!-- Caption overlay at the top -->
+    <item android:top="8dp" android:left="8dp" android:right="8dp" android:height="40dp">
+        <shape android:shape="rectangle">
+            <solid android:color="#80000000" />
+        </shape>
+    </item>
+
+    <!-- Avatar placeholder -->
+    <item android:left="16dp" android:bottom="16dp" android:width="32dp" android:height="32dp">
+        <shape android:shape="oval">
+            <solid android:color="#CCCCCC" />
+        </shape>
+    </item>
+
+    <!-- Username placeholder -->
+    <item android:left="56dp" android:bottom="16dp" android:width="80dp" android:height="16dp">
+        <shape android:shape="rectangle">
+            <solid android:color="#CCCCCC" />
+            <corners android:radius="4dp" />
+        </shape>
+    </item>
+</layer-list> 

app/src/main/res/layout/widget_latest_post.xml

@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="8dp"
+    android:background="@drawable/widget_background">
+
+    <!-- Post Image -->
+    <ImageView
+        android:id="@+id/widget_post_image"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scaleType="centerCrop"
+        android:contentDescription="Latest post" />
+
+    <!-- Caption overlay at the top -->
+    <TextView
+        android:id="@+id/widget_post_caption"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentTop="true"
+        android:padding="8dp"
+        android:background="#80000000"
+        android:textColor="#FFFFFF"
+        android:maxLines="2"
+        android:ellipsize="end"
+        android:textSize="14sp" />
+
+    <!-- Username and avatar container -->
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentStart="true"
+        android:layout_margin="8dp"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:background="#80000000"
+        android:padding="4dp">
+
+        <!-- User Avatar -->
+        <ImageView
+            android:id="@+id/widget_user_avatar"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:contentDescription="User avatar" />
+
+        <!-- Username -->
+        <TextView
+            android:id="@+id/widget_username"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textColor="#FFFFFF"
+            android:textSize="12sp"
+            android:maxLines="1"
+            android:ellipsize="end"
+            android:layout_marginStart="4dp" />
+    </LinearLayout>
+
+    <!-- Empty state view -->
+    <TextView
+        android:id="@+id/widget_empty_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:textSize="14sp"
+        android:textColor="#FFFFFF"
+        android:background="#80000000"
+        android:text="No posts available"
+        android:visibility="gone" />
+
+</RelativeLayout> 

app/src/main/res/xml/latest_post_widget_info.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:initialKeyguardLayout="@layout/widget_latest_post"
+    android:initialLayout="@layout/widget_latest_post"
+    android:minWidth="180dp"
+    android:minHeight="180dp"
+    android:previewImage="@drawable/widget_preview"
+    android:resizeMode="horizontal|vertical"
+    android:updatePeriodMillis="1800000"
+    android:widgetCategory="home_screen">
+</appwidget-provider>