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/*
* Copyright (C) 2012 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.example.android.immersivemode;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.MenuItem;
import android.view.View;
import com.example.android.common.logger.Log;
public class ImmersiveModeFragment extends Fragment {
public static final String TAG = "ImmersiveModeFragment";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
final View decorView = getActivity().getWindow().getDecorView();
decorView.setOnSystemUiVisibilityChangeListener(
new View.OnSystemUiVisibilityChangeListener() {
@Override
public void onSystemUiVisibilityChange(int i) {
int height = decorView.getHeight();
Log.i(TAG, "Current height: " + height);
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.sample_action) {
toggleHideyBar();
}
return true;
}
/**
* Detects and toggles immersive mode (also known as "hidey bar" mode).
*/
public void toggleHideyBar() {
// The UI options currently enabled are represented by a bitfield.
// getSystemUiVisibility() gives us that bitfield.
int uiOptions = getActivity().getWindow().getDecorView().getSystemUiVisibility();
int newUiOptions = uiOptions;
boolean isImmersiveModeEnabled =
((uiOptions | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY) == uiOptions);
if (isImmersiveModeEnabled) {
Log.i(TAG, "Turning immersive mode mode off. ");
} else {
Log.i(TAG, "Turning immersive mode mode on.");
}
// Navigation bar hiding: Backwards compatible to ICS.
if (Build.VERSION.SDK_INT >= 14) {
newUiOptions ^= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
}
// Status bar hiding: Backwards compatible to Jellybean
if (Build.VERSION.SDK_INT >= 16) {
newUiOptions ^= View.SYSTEM_UI_FLAG_FULLSCREEN;
}
// Immersive mode: Backward compatible to KitKat.
// Note that this flag doesn't do anything by itself, it only augments the behavior
// of HIDE_NAVIGATION and FLAG_FULLSCREEN. For the purposes of this sample
// all three flags are being toggled together.
// Note that there are two immersive mode UI flags, one of which is referred to as "sticky".
// Sticky immersive mode differs in that it makes the navigation and status bars
// semi-transparent, and the UI flag does not get cleared when the user interacts with
// the screen.
if (Build.VERSION.SDK_INT >= 18) {
newUiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
}
getActivity().getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
}
}