Main-screen recordings list, player actions, background recording, exports (1.4.0-alpha)

- Main screen: recordings list at the bottom (newest first); removed the separate
  library screen and the top-right link
- Player: delete/rename/share/export, no autoplay, embedded-marker fallback
- Word-level tap-to-seek from Whisper token timestamps (length fallback)
- Export transcripts as .txt + .srt to Downloads
- RecordingService: microphone foreground service for background recording
- FileProvider for sharing on Android 9 and older
- StreamingResampler extracted to its own class + JUnit regression tests
- Bump to 1.4.0-alpha (versionCode 6)

1 files changed, 166 insertions, 162 deletions

diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 8bda7d3..e919117 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,178 +1,182 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/root"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@color/background"
-    android:paddingLeft="20dp"
-    android:paddingRight="20dp">
-
-    <TextView
-        android:id="@+id/titleText"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:letterSpacing="0.04"
-        android:text="@string/app_name"
-        android:textColor="@color/text_primary"
-        android:textSize="30sp"
-        android:textStyle="bold"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/libraryButton"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="4dp"
-        android:background="?android:attr/selectableItemBackground"
-        android:padding="8dp"
-        android:text="@string/library"
-        android:textColor="@color/text_secondary"
-        android:textSize="14sp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/subtitleText"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/subtitle"
-        android:textColor="@color/text_secondary"
-        android:textSize="12sp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/titleText" />
-
-    <ImageView
-        android:id="@+id/recIndicator"
-        android:layout_width="12dp"
-        android:layout_height="12dp"
-        android:layout_marginBottom="6dp"
-        android:contentDescription="@null"
-        android:src="@drawable/ic_rec_dot"
-        android:visibility="invisible"
-        app:layout_constraintBottom_toTopOf="@id/timerText"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent" />
-
-    <TextView
-        android:id="@+id/timerText"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginBottom="10dp"
-        android:fontFamily="monospace"
-        android:text="@string/timer_zero"
-        android:textColor="@color/text_primary"
-        android:textSize="46sp"
-        android:textStyle="bold"
-        app:layout_constraintBottom_toTopOf="@id/recordButton"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent" />
-
-    <ImageButton
-        android:id="@+id/recordButton"
-        android:layout_width="148dp"
-        android:layout_height="148dp"
-        android:background="@drawable/bg_record_idle"
-        android:contentDescription="@string/cd_record"
-        android:scaleType="centerInside"
-        android:src="@android:color/transparent"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="0.34" />
-
-    <com.wuhei.reccoon.WaveformView
-        android:id="@+id/waveformView"
-        android:layout_width="0dp"
-        android:layout_height="64dp"
-        android:layout_marginTop="16dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/recordButton" />
-
-    <com.wuhei.reccoon.LevelMeterView
-        android:id="@+id/levelMeter"
-        android:layout_width="0dp"
-        android:layout_height="38dp"
-        android:layout_marginTop="10dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/waveformView" />
-
-    <Button
-        android:id="@+id/markButton"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="6dp"
-        android:enabled="false"
-        android:minWidth="140dp"
-        android:text="@string/mark_action"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/levelMeter" />
+    android:fillViewport="true">
 
     <LinearLayout
-        android:id="@+id/optionsRow"
-        android:layout_width="wrap_content"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="2dp"
-        android:gravity="center"
-        android:orientation="horizontal"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/markButton">
-
-        <androidx.appcompat.widget.AppCompatCheckBox
-            android:id="@+id/monoCheckbox"
+        android:orientation="vertical"
+        android:paddingLeft="20dp"
+        android:paddingTop="16dp"
+        android:paddingRight="20dp"
+        android:paddingBottom="24dp">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:letterSpacing="0.04"
+            android:text="@string/app_name"
+            android:textColor="@color/text_primary"
+            android:textSize="30sp"
+            android:textStyle="bold" />
+
+        <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:contentDescription="@string/mono_recording"
-            android:text="@string/mono_short"
+            android:layout_gravity="center_horizontal"
+            android:text="@string/subtitle"
             android:textColor="@color/text_secondary"
-            android:textSize="13sp" />
+            android:textSize="12sp" />
+
+        <ImageView
+            android:id="@+id/recIndicator"
+            android:layout_width="12dp"
+            android:layout_height="12dp"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginTop="14dp"
+            android:contentDescription="@null"
+            android:src="@drawable/ic_rec_dot"
+            android:visibility="invisible" />
 
-        <androidx.appcompat.widget.AppCompatCheckBox
-            android:id="@+id/silenceCheckbox"
+        <TextView
+            android:id="@+id/timerText"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginStart="10dp"
-            android:contentDescription="@string/silence_recording"
-            android:text="@string/silence_short"
+            android:layout_gravity="center_horizontal"
+            android:fontFamily="monospace"
+            android:text="@string/timer_zero"
+            android:textColor="@color/text_primary"
+            android:textSize="46sp"
+            android:textStyle="bold" />
+
+        <ImageButton
+            android:id="@+id/recordButton"
+            android:layout_width="148dp"
+            android:layout_height="148dp"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginTop="6dp"
+            android:background="@drawable/bg_record_idle"
+            android:contentDescription="@string/cd_record"
+            android:scaleType="centerInside"
+            android:src="@android:color/transparent" />
+
+        <com.wuhei.reccoon.WaveformView
+            android:id="@+id/waveformView"
+            android:layout_width="match_parent"
+            android:layout_height="64dp"
+            android:layout_marginTop="16dp" />
+
+        <com.wuhei.reccoon.LevelMeterView
+            android:id="@+id/levelMeter"
+            android:layout_width="match_parent"
+            android:layout_height="38dp"
+            android:layout_marginTop="10dp" />
+
+        <Button
+            android:id="@+id/markButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginTop="6dp"
+            android:enabled="false"
+            android:minWidth="140dp"
+            android:text="@string/mark_action" />
+
+        <LinearLayout
+            android:id="@+id/optionsRow"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginTop="2dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <androidx.appcompat.widget.AppCompatCheckBox
+                android:id="@+id/monoCheckbox"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:contentDescription="@string/mono_recording"
+                android:text="@string/mono_short"
+                android:textColor="@color/text_secondary"
+                android:textSize="13sp" />
+
+            <androidx.appcompat.widget.AppCompatCheckBox
+                android:id="@+id/silenceCheckbox"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="10dp"
+                android:contentDescription="@string/silence_recording"
+                android:text="@string/silence_short"
+                android:textColor="@color/text_secondary"
+                android:textSize="13sp" />
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/statusText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="6dp"
+            android:gravity="center"
+            android:text="@string/status_idle"
             android:textColor="@color/text_secondary"
-            android:textSize="13sp" />
-    </LinearLayout>
+            android:textSize="14sp" />
 
-    <TextView
-        android:id="@+id/statusText"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="8dp"
-        android:gravity="center"
-        android:text="@string/status_idle"
-        android:textColor="@color/text_secondary"
-        android:textSize="14sp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/optionsRow" />
-
-    <TextView
-        android:id="@+id/footerText"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginBottom="10dp"
-        android:alpha="0.6"
-        android:text="@string/footer"
-        android:textColor="@color/text_secondary"
-        android:textSize="11sp"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="1dp"
+            android:layout_marginTop="20dp"
+            android:layout_marginBottom="14dp"
+            android:background="@color/divider" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/recordings_title"
+            android:textColor="@color/text_primary"
+            android:textSize="18sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:text="@string/recordings_subtitle"
+            android:textColor="@color/text_secondary"
+            android:textSize="12sp" />
+
+        <LinearLayout
+            android:id="@+id/recordingsContainer"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="6dp"
+            android:orientation="vertical" />
+
+        <TextView
+            android:id="@+id/emptyText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:gravity="center"
+            android:text="@string/recordings_empty"
+            android:textColor="@color/text_secondary"
+            android:textSize="14sp"
+            android:visibility="gone" />
+
+        <TextView
+            android:id="@+id/footerText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginTop="20dp"
+            android:alpha="0.6"
+            android:text="@string/footer"
+            android:textColor="@color/text_secondary"
+            android:textSize="11sp" />
+
+    </LinearLayout>
+</ScrollView>