Making sure the path activity renders well o n small screens (#1061)

* Making sure the path activity renders well o n small screens

* Tweaked the function

* Removed commented code

app/src/main/java/org/thoughtcrime/securesms/home/PathActivity.kt

@@ -10,12 +10,14 @@ import android.util.AttributeSet
 import android.util.TypedValue
 import android.view.Gravity
 import android.view.View
+import android.widget.FrameLayout
 import android.widget.LinearLayout
 import android.widget.RelativeLayout
 import android.widget.TextView
 import android.widget.Toast
 import androidx.annotation.ColorRes
 import androidx.core.content.ContextCompat
+import androidx.core.view.doOnLayout
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
@@ -49,6 +51,7 @@ import org.thoughtcrime.securesms.util.fadeIn
 import org.thoughtcrime.securesms.util.fadeOut
 import org.thoughtcrime.securesms.util.getAccentColor
 
+
 class PathActivity : ScreenLockActionBarActivity() {
     private lateinit var binding: ActivityPathBinding
     private val broadcastReceivers = mutableListOf<BroadcastReceiver>()
@@ -82,6 +85,20 @@ class PathActivity : ScreenLockActionBarActivity() {
                     }
             }
         }
+
+        binding.pathScroll.doOnLayout {
+            val child: View = binding.pathScroll.getChildAt(0)
+            val isScrollable: Boolean = child.height > binding.pathScroll.height
+            val params = binding.pathRowsContainer.layoutParams as FrameLayout.LayoutParams
+
+            if(isScrollable){
+                params.gravity = Gravity.CENTER_HORIZONTAL
+            } else {
+                params.gravity = Gravity.CENTER
+            }
+
+            binding.pathRowsContainer.layoutParams = params
+        }
     }
 
     private fun registerObservers() {

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

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <gradient
+        android:centerY="0.75"
+        android:centerColor="#00000000"
+        android:endColor="?colorPrimary"
+        android:angle="270" />
+
+</shape>

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

@@ -27,12 +27,27 @@
         android:layout_margin="@dimen/large_spacing"
         android:clipChildren="false">
 
-        <LinearLayout
+        <ScrollView
-            android:id="@+id/pathRowsContainer"
+            android:id="@+id/pathScroll"
-            android:layout_width="wrap_content"
+            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
+            android:layout_height="match_parent"
-            android:orientation="vertical"
+            android:layout_centerInParent="true"
-            android:layout_centerInParent="true" />
+            android:paddingBottom="@dimen/large_spacing">
+
+            <LinearLayout
+                android:id="@+id/pathRowsContainer"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_horizontal"
+                android:orientation="vertical" />
+
+        </ScrollView>
+
+        <View
+            android:id="@+id/gradientView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:background="@drawable/fade_gradient" />
 
         <ProgressBar
             android:id="@+id/spinner"