Debug memory usage

app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java

@@ -31,6 +31,7 @@ import android.database.sqlite.SQLiteDatabaseCorruptException;
 import android.graphics.Paint;
 import android.net.Uri;
 import android.os.Bundle;
+import android.os.Debug;
 import android.provider.Settings;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -92,7 +93,8 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
     private SwitchCompat swAuthSasl;
     private TextView tvProcessors;
     private TextView tvMemoryClass;
-    private TextView tvStorageSpace;
+    private TextView tvMemoryUsage;
+    private TextView tvStorageUsage;
     private TextView tvFingerprint;
     private Button btnCharsets;
     private Button btnCiphers;
@@ -151,7 +153,8 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         swAuthSasl = view.findViewById(R.id.swAuthSasl);
         tvProcessors = view.findViewById(R.id.tvProcessors);
         tvMemoryClass = view.findViewById(R.id.tvMemoryClass);
-        tvStorageSpace = view.findViewById(R.id.tvStorageSpace);
+        tvMemoryUsage = view.findViewById(R.id.tvMemoryUsage);
+        tvStorageUsage = view.findViewById(R.id.tvStorageUsage);
         tvFingerprint = view.findViewById(R.id.tvFingerprint);
         btnCharsets = view.findViewById(R.id.btnCharsets);
         btnCiphers = view.findViewById(R.id.btnCiphers);
@@ -590,7 +593,16 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
         tvMemoryClass.setText(getString(R.string.title_advanced_memory_class,
                 class_mb + " MB", Helper.humanReadableByteCount(mi.totalMem)));
 
-        tvStorageSpace.setText(getString(R.string.title_advanced_storage_space,
+        Runtime rt = Runtime.getRuntime();
+        long hused = rt.totalMemory() - rt.freeMemory();
+        long hmax = rt.maxMemory();
+        long nheap = Debug.getNativeHeapAllocatedSize();
+        tvMemoryUsage.setText(getString(R.string.title_advanced_memory_usage,
+                Helper.humanReadableByteCount(hused),
+                Helper.humanReadableByteCount(hmax),
+                Helper.humanReadableByteCount(nheap)));
+
+        tvStorageUsage.setText(getString(R.string.title_advanced_storage_usage,
                 Helper.humanReadableByteCount(Helper.getAvailableStorageSpace()),
                 Helper.humanReadableByteCount(Helper.getTotalStorageSpace())));
         tvFingerprint.setText(Helper.getFingerprint(getContext()));

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

@@ -409,15 +409,25 @@
             app:layout_constraintTop_toBottomOf="@id/tvProcessors" />
 
         <eu.faircode.email.FixedTextView
-            android:id="@+id/tvStorageSpace"
+            android:id="@+id/tvMemoryUsage"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:text="@string/title_advanced_storage_space"
+            android:text="@string/title_advanced_memory_class"
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/tvMemoryClass" />
 
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvStorageUsage"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:text="@string/title_advanced_storage_usage"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvMemoryUsage" />
+
         <eu.faircode.email.FixedTextView
             android:id="@+id/tvFingerprint"
             android:layout_width="0dp"
@@ -428,7 +438,7 @@
             android:textIsSelectable="true"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tvStorageSpace" />
+            app:layout_constraintTop_toBottomOf="@id/tvStorageUsage" />
 
         <Button
             android:id="@+id/btnCharsets"
@@ -454,6 +464,6 @@
             android:id="@+id/grpDebug"
             android:layout_width="0dp"
             android:layout_height="0dp"
-            app:constraint_referenced_ids="swAuthPlain,swAuthLogin,swAuthSasl,tvProcessors,tvMemoryClass,tvStorageSpace,tvFingerprint,btnCharsets,btnCiphers" />
+            app:constraint_referenced_ids="swAuthPlain,swAuthLogin,swAuthSasl,tvProcessors,tvMemoryClass,tvMemoryUsage,tvStorageUsage,tvFingerprint,btnCharsets,btnCiphers" />
     </androidx.constraintlayout.widget.ConstraintLayout>
 </eu.faircode.email.ScrollViewEx>

app/src/main/res/values/strings.xml

@@ -494,7 +494,8 @@
     <string name="title_advanced_more">More options</string>
     <string name="title_advanced_processors" translatable="false">Processors: %1$d</string>
     <string name="title_advanced_memory_class" translatable="false">Memory class: %1$s/%2$s</string>
-    <string name="title_advanced_storage_space" translatable="false">Storage space: %1$s/%2$s</string>
+    <string name="title_advanced_memory_usage" translatable="false">Memory usage: %1$s/%2$s Native: %3$s</string>
+    <string name="title_advanced_storage_usage" translatable="false">Storage space: %1$s/%2$s</string>
     <string name="title_advanced_charsets" translatable="false">Charsets</string>
     <string name="title_advanced_ciphers" translatable="false">Ciphers</string>