Android: Ability To Auto-hide The Title/status Bars?

I have a fullscreen drawing app that disables the title and status bars using the Android Theme.NoTitleBar.Fullscreen theme. One of the requests I am getting would be the ability

Solution 1:

Using android 3.1, one can set the visibility of the UI Status bar using

View.setSystemUiVisibility(View.STATUS_BAR_HIDDEN);

on touching where the status bar would be, the bar appears.

You can listen for this via the

View.setOnSystemUiVisibilityChangeListener 

method and then hide the bar again after some time

Solution 2:

So, just wondering if there is any way to auto-hide the OS standard title and status bars.

None that I have seen.

Moreover, what your user is requesting can't be done generically -- what if there is a Button up "near where they would be"?

Solution 3:

I think the solution to your problem is right in the dummy Fullscreen project Android Studio has. Check it out:

publicclassFullscreenActivityextendsActivity {
        /**
         * Whether or not the system UI should be auto-hidden after
         * {@link #AUTO_HIDE_DELAY_MILLIS} milliseconds.
         */privatestaticfinalbooleanAUTO_HIDE=true;
        /**
         * If {@link #AUTO_HIDE} is set, the number of milliseconds to wait after
         * user interaction before hiding the system UI.
         */privatestaticfinalintAUTO_HIDE_DELAY_MILLIS=3000;

        /**
         * If set, will toggle the system UI visibility upon interaction. Otherwise,
         * will show the system UI visibility upon interaction.
         */privatestaticfinalbooleanTOGGLE_ON_CLICK=true;

        /**
         * The flags to pass to {@link SystemUiHider#getInstance}.
         */privatestaticfinalintHIDER_FLAGS= SystemUiHider.FLAG_HIDE_NAVIGATION;

        /**
         * The instance of the {@link SystemUiHider} for this activity.
         */private SystemUiHider mSystemUiHider;

        @OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_fullscreen);

            finalViewcontrolsView= findViewById(R.id.fullscreen_content_controls);
            finalViewcontentView= findViewById(R.id.fullscreen_content);

            // Set up an instance of SystemUiHider to control the system UI for// this activity.
            mSystemUiHider = SystemUiHider.getInstance(this, contentView, HIDER_FLAGS);
            mSystemUiHider.setup();
            mSystemUiHider
                    .setOnVisibilityChangeListener(newSystemUiHider.OnVisibilityChangeListener() {
                        // Cached values.int mControlsHeight;
                        int mShortAnimTime;

                        @Override@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)publicvoidonVisibilityChange(boolean visible) {
                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
                                // If the ViewPropertyAnimator API is available// (Honeycomb MR2 and later), use it to animate the// in-layout UI controls at the bottom of the// screen.if (mControlsHeight == 0) {
                                    mControlsHeight = controlsView.getHeight();
                                }
                                if (mShortAnimTime == 0) {
                                    mShortAnimTime = getResources().getInteger(
                                            android.R.integer.config_shortAnimTime);
                                }
                                controlsView.animate()
                                        .translationY(visible ? 0 : mControlsHeight)
                                        .setDuration(mShortAnimTime);
                            } else {
                                // If the ViewPropertyAnimator APIs aren't// available, simply show or hide the in-layout UI// controls.
                                controlsView.setVisibility(visible ? View.VISIBLE : View.GONE);
                            }

                            if (visible && AUTO_HIDE) {
                                // Schedule a hide().
                                delayedHide(AUTO_HIDE_DELAY_MILLIS);
                            }
                        }
                    });

            // Set up the user interaction to manually show or hide the system UI.
            contentView.setOnClickListener(newView.OnClickListener() {
                @OverridepublicvoidonClick(View view) {
                    if (TOGGLE_ON_CLICK) {
                        mSystemUiHider.toggle();
                    } else {
                        mSystemUiHider.show();
                    }
                }
            });

            // Upon interacting with UI controls, delay any scheduled hide()// operations to prevent the jarring behavior of controls going away// while interacting with the UI.
            findViewById(R.id.dummy_button).setOnTouchListener(mDelayHideTouchListener);
        }

        @OverrideprotectedvoidonPostCreate(Bundle savedInstanceState) {
            super.onPostCreate(savedInstanceState);

            // Trigger the initial hide() shortly after the activity has been// created, to briefly hint to the user that UI controls// are available.
            delayedHide(100);
        }


        /**
         * Touch listener to use for in-layout UI controls to delay hiding the
         * system UI. This is to prevent the jarring behavior of controls going away
         * while interacting with activity UI.
         */
        View.OnTouchListenermDelayHideTouchListener=newView.OnTouchListener() {
            @OverridepublicbooleanonTouch(View view, MotionEvent motionEvent) {
                if (AUTO_HIDE) {
                    delayedHide(AUTO_HIDE_DELAY_MILLIS);
                }
                returnfalse;
            }
        };

        HandlermHideHandler=newHandler();
        RunnablemHideRunnable=newRunnable() {
            @Overridepublicvoidrun() {
                mSystemUiHider.hide();
            }
        };

        /**
         * Schedules a call to hide() in [delay] milliseconds, canceling any
         * previously scheduled calls.
         */privatevoiddelayedHide(int delayMillis) {
            mHideHandler.removeCallbacks(mHideRunnable);
            mHideHandler.postDelayed(mHideRunnable, delayMillis);
        }
}