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BasicImmersiveMode / src / com.example.android.basicimmersivemode /

BasicImmersiveModeFragment.java

       
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        /*
       
       
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        * Copyright (C) 2013 The Android Open Source Project
       
       
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        *
       
       
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        * Licensed under the Apache License, Version 2.0 (the "License");
       
       
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        * you may not use this file except in compliance with the License.
       
       
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        * You may obtain a copy of the License at
       
       
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        *
       
       
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        *      http://www.apache.org/licenses/LICENSE-2.0
       
       
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        *
       
       
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        * Unless required by applicable law or agreed to in writing, software
       
       
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        * distributed under the License is distributed on an "AS IS" BASIS,
       
       
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        * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       
       
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        * See the License for the specific language governing permissions and
       
       
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        * limitations under the License.
       
       
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        */
       
       
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        package com.example.android.basicimmersivemode;
       
       
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        import android.os.Bundle;
       
       
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        import android.support.v4.app.Fragment;
       
       
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        import android.view.MenuItem;
       
       
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        import android.view.View;
       
       
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        import com.example.android.common.logger.Log;
       
       
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        public class BasicImmersiveModeFragment extends Fragment {
       
       
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        public static final String TAG = "BasicImmersiveModeFragment";
       
       
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        @Override
       
       
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        public void onCreate(Bundle savedInstanceState) {
       
       
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        super.onCreate(savedInstanceState);
       
       
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        setHasOptionsMenu(true);
       
       
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        }
       
       
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        @Override
       
       
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        public void onActivityCreated(Bundle savedInstanceState) {
       
       
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        super.onActivityCreated(savedInstanceState);
       
       
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        final View decorView = getActivity().getWindow().getDecorView();
       
       
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        decorView.setOnSystemUiVisibilityChangeListener(
       
       
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        new View.OnSystemUiVisibilityChangeListener() {
       
       
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        @Override
       
       
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        public void onSystemUiVisibilityChange(int i) {
       
       
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        int height = decorView.getHeight();
       
       
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        Log.i(TAG, "Current height: " + height);
       
       
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        }
       
       
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        });
       
       
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        }
       
       
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        @Override
       
       
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        public boolean onOptionsItemSelected(MenuItem item) {
       
       
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        if (item.getItemId() == R.id.sample_action) {
       
       
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        toggleHideyBar();
       
       
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        }
       
       
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        return true;
       
       
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        }
       
       
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        /**
       
       
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        * Detects and toggles immersive mode.
       
       
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        */
       
       
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        public void toggleHideyBar() {
       
       
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        // The UI options currently enabled are represented by a bitfield.
       
       
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        // getSystemUiVisibility() gives us that bitfield.
       
       
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        int uiOptions = getActivity().getWindow().getDecorView().getSystemUiVisibility();
       
       
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        int newUiOptions = uiOptions;
       
       
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        boolean isImmersiveModeEnabled =
       
       
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        ((uiOptions | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY) == uiOptions);
       
       
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        if (isImmersiveModeEnabled) {
       
       
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        Log.i(TAG, "Turning immersive mode mode off. ");
       
       
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        } else {
       
       
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        Log.i(TAG, "Turning immersive mode mode on.");
       
       
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        }
       
       
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        // Immersive mode: Backward compatible to KitKat (API 19).
       
       
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        // Note that this flag doesn't do anything by itself, it only augments the behavior
       
       
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        // of HIDE_NAVIGATION and FLAG_FULLSCREEN.  For the purposes of this sample
       
       
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        // all three flags are being toggled together.
       
       
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        // This sample uses the "sticky" form of immersive mode, which will let the user swipe
       
       
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        // the bars back in again, but will automatically make them disappear a few seconds later.
       
       
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        newUiOptions ^= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
       
       
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        newUiOptions ^= View.SYSTEM_UI_FLAG_FULLSCREEN;
       
       
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        newUiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
       
       
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        getActivity().getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
       
       
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        }
       
       
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        }