Store version code

app/src/main/java/com/hippo/ehviewer/EhApplication.java

@@ -18,6 +18,8 @@ package com.hippo.ehviewer;
 
 import android.app.ActivityManager;
 import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.os.Debug;
 import android.support.annotation.NonNull;
@@ -89,6 +91,14 @@ public class EhApplication extends SceneApplication {
             Analytics.start(this);
         }
 
+        // Update version code
+        try {
+            PackageInfo pi= getPackageManager().getPackageInfo(getPackageName(), 0);
+            Settings.putVersionCode(pi.versionCode);
+        } catch (PackageManager.NameNotFoundException e) {
+            // Ignore
+        }
+
         if (DEBUG_NATIVE_MEMORY) {
             debugNativeMemory();
         }

app/src/main/java/com/hippo/ehviewer/Settings.java

@@ -101,6 +101,17 @@ public class Settings {
         sSettingsPre.edit().putString(key, Integer.toString(value)).apply();
     }
 
+    private static final String KEY_VERSION_CODE = "version_code";
+    private static final int DEFAULT_VERSION_CODE = 0;
+
+    public static int getVersionCode() {
+        return getInt(KEY_VERSION_CODE, DEFAULT_VERSION_CODE);
+    }
+
+    public static void putVersionCode(int value) {
+        putInt(KEY_VERSION_CODE, value);
+    }
+
     private static final String KEY_DISPLAY_NAME = "display_name";
     private static final String DEFAULT_DISPLAY_NAME = null;