Move fragments to core UI.

core/ui/build.gradle.kts

@@ -23,6 +23,8 @@ android {
 dependencies {
   lintChecks(project(":lintchecks"))
 
+  api(project(":core:util"))
+
   platform(libs.androidx.compose.bom).let { composeBom ->
     api(composeBom)
     androidTestApi(composeBom)

core/ui/src/main/java/org/signal/core/ui/compose/ComposeDialogFragment.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.ui.compose
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.ComposeView
+import androidx.compose.ui.platform.ViewCompositionStrategy
+import androidx.fragment.app.DialogFragment
+import org.signal.core.ui.compose.theme.SignalTheme
+
+/**
+ * Generic ComposeDialogFragment which can be subclassed to build UI with compose.
+ */
+abstract class ComposeDialogFragment : DialogFragment() {
+  override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+    return ComposeView(requireContext()).apply {
+      setViewCompositionStrategy(ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed)
+      setContent {
+        SignalTheme {
+          DialogContent()
+        }
+      }
+    }
+  }
+
+  @Composable
+  abstract fun DialogContent()
+}

core/ui/src/main/java/org/signal/core/ui/compose/ComposeFragment.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.ui.compose
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.compose.runtime.Composable
+import androidx.fragment.compose.content
+import org.signal.core.ui.compose.theme.SignalTheme
+import org.signal.core.ui.logging.LoggingFragment
+
+/**
+ * Generic ComposeFragment which can be subclassed to build UI with compose.
+ */
+abstract class ComposeFragment : LoggingFragment() {
+  override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? = content {
+    SignalTheme {
+      FragmentContent()
+    }
+  }
+
+  @Composable
+  abstract fun FragmentContent()
+}

core/ui/src/main/java/org/signal/core/ui/logging/LoggingFragment.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.ui.logging;
+
+import android.os.Bundle;
+
+import androidx.annotation.LayoutRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import org.signal.core.util.logging.Log;
+
+/**
+ * Simply logs out lifecycle events.
+ */
+public abstract class LoggingFragment extends Fragment {
+
+  private static final String TAG = Log.tag(LoggingFragment.class);
+
+  public LoggingFragment() { }
+
+  public LoggingFragment(@LayoutRes int contentLayoutId) {
+    super(contentLayoutId);
+  }
+
+  @Override
+  public void onCreate(@Nullable Bundle savedInstanceState) {
+    logEvent("onCreate()");
+    super.onCreate(savedInstanceState);
+  }
+
+  @Override
+  public void onStart() {
+    logEvent("onStart()");
+    super.onStart();
+  }
+
+  @Override
+  public void onStop() {
+    logEvent("onStop()");
+    super.onStop();
+  }
+
+  @Override
+  public void onDestroy() {
+    logEvent("onDestroy()");
+    super.onDestroy();
+  }
+
+  private void logEvent(@NonNull String event) {
+    Log.d(TAG, "[" + Log.tag(getClass()) + "] " + event);
+  }
+}