Improve GallerySpider

app/src/main/java/com/hippo/util/SystemUiHelperImplJB.java

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+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.util;
+
+import android.annotation.TargetApi;
+import android.app.ActionBar;
+import android.app.Activity;
+import android.os.Build;
+import android.view.View;
+
+@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+class SystemUiHelperImplJB extends SystemUiHelperImplICS {
+
+    SystemUiHelperImplJB(Activity activity, int level, int flags,
+            SystemUiHelper.OnVisibilityChangeListener onVisibilityChangeListener) {
+        super(activity, level, flags, onVisibilityChangeListener);
+    }
+
+    @Override
+    protected int createShowFlags() {
+        int flag = super.createShowFlags();
+
+        if (mLevel >= SystemUiHelper.LEVEL_HIDE_STATUS_BAR) {
+            flag |= View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
+
+            if (mLevel >= SystemUiHelper.LEVEL_LEAN_BACK) {
+                flag |= View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
+            }
+        }
+
+        return flag;
+    }
+
+    @Override
+    protected int createHideFlags() {
+        int flag = super.createHideFlags();
+
+        if (mLevel >= SystemUiHelper.LEVEL_HIDE_STATUS_BAR) {
+            flag |= View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                    | View.SYSTEM_UI_FLAG_FULLSCREEN;
+
+            if (mLevel >= SystemUiHelper.LEVEL_LEAN_BACK) {
+                flag |= View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
+            }
+        }
+
+        return flag;
+    }
+
+    @Override
+    protected void onSystemUiShown() {
+        if (mLevel == SystemUiHelper.LEVEL_LOW_PROFILE) {
+            // Manually show the action bar when in low profile mode.
+            ActionBar ab = mActivity.getActionBar();
+            if (ab != null) {
+                ab.show();
+            }
+        }
+
+        setIsShowing(true);
+    }
+
+    @Override
+    protected void onSystemUiHidden() {
+        if (mLevel == SystemUiHelper.LEVEL_LOW_PROFILE) {
+            // Manually hide the action bar when in low profile mode.
+            ActionBar ab = mActivity.getActionBar();
+            if (ab != null) {
+                ab.hide();
+            }
+        }
+
+        setIsShowing(false);
+    }
+}