Android 隐藏底部导航栏,并且Dialog 弹出时保持隐藏

1. 全屏显示
   可以在配置清单文件中设置,也可在代码中设置

        
        true
        @null

    也可在`activity`的`onCreate`中`setContentView`前设置

        // 将activity设置为全屏显示
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

2. 隐藏底部导航栏

   也需要在 activity的onCreate中setContentView前设置

    
    public static void hideNavigationBar(Window window) {
        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
        window.getDecorView().setonSystemUiVisibilityChangeListener(visibility -> {
            int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                    //布局位于状态栏下方
                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                    //全屏
                    View.SYSTEM_UI_FLAG_FULLSCREEN |
                    //隐藏导航栏
                    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
            if (Build.VERSION.SDK_INT >= 19) {
                uiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
            } else {
                uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
            }
            window.getDecorView().setSystemUiVisibility(uiOptions);
        });
    }

3. dialog弹出时隐藏导航栏

   普通Dialog中

        Dialog dialog = builder.create();
        NavigationBarUtil.focusNotAle(dialog.getWindow());
        dialog.show();
        NavigationBarUtil.hideNavigationBar(dialog.getWindow());
        NavigationBarUtil.clearFocusNotAle(dialog.getWindow());

    自定义ProgressDialog,重写show()方法

    @Override
    public void show() {
        NavigationBarUtil.focusNotAle(window);
        super.show();
        NavigationBarUtil.hideNavigationBar(window);
        NavigationBarUtil.clearFocusNotAle(window);
    }

4.工具类贴一下

public class NavigationBarUtil {
    
    public static void hideNavigationBar(Window window) {
        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
        window.getDecorView().setonSystemUiVisibilityChangeListener(visibility -> {
            int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                    //布局位于状态栏下方
                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                    //全屏
                    View.SYSTEM_UI_FLAG_FULLSCREEN |
                    //隐藏导航栏
                    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
            if (Build.VERSION.SDK_INT >= 19) {
                uiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
            } else {
                uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
            }
            window.getDecorView().setSystemUiVisibility(uiOptions);
        });
    }

    
    public static void focusNotAle(Window window) {
        window.setFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
    }

    
    public static void clearFocusNotAle(Window window) {
        window.clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
    }
}