add option of disable auto update

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

@@ -61,6 +61,7 @@ public class EhApplication extends RecordingApplication implements Thread.Uncaug
     private static final String TAG = EhApplication.class.getSimpleName();
 
     public static final boolean BETA = false;
+    public static final boolean AUTO_UPDATE = true;
 
     private static final boolean DEBUG_CONACO = false;
     private static final boolean DEBUG_PRINT_NATIVE_MEMORY = false;

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

@@ -949,6 +949,8 @@ public class Settings {
      ********************/
     private static final String KEY_BETA_UPDATE_CHANNEL = "beta_update_channel";
     private static final boolean DEFAULT_BETA_UPDATE_CHANNEL = EhApplication.BETA;
+    private static final String KEY_AUTO_CHECK_FOR_UPDATES = "auto_check_for_updates";
+    private static final boolean DEFAULT_AUTO_CHECK_FOR_UPDATES = EhApplication.AUTO_UPDATE;
 
     public static boolean getBetaUpdateChannel() {
         return getBoolean(KEY_BETA_UPDATE_CHANNEL, DEFAULT_BETA_UPDATE_CHANNEL);
@@ -958,6 +960,10 @@ public class Settings {
         putBoolean(KEY_BETA_UPDATE_CHANNEL, value);
     }
 
+    public static boolean getAutoCheckUpdateEnable() {
+        return getBoolean(KEY_AUTO_CHECK_FOR_UPDATES, DEFAULT_AUTO_CHECK_FOR_UPDATES);
+    }
+
     /********************
      ****** Crash
      ********************/

app/src/main/java/com/hippo/ehviewer/ui/MainActivity.java

@@ -331,7 +331,9 @@ public final class MainActivity extends StageActivity
 
         if (savedInstanceState == null) {
             onInit();
-            CommonOperations.checkUpdate(this, false);
+            if (Settings.getAutoCheckUpdateEnable()) {
+                CommonOperations.checkUpdate(this, false);
+            }
             checkDownloadLocation();
             if (Settings.getCellularNetworkWarning()) {
                 checkCellularNetwork();