如何隐藏导航栏永久Android的活动？

问题描述：

我想隐藏的导航在我的活动永久栏（而不是整个系统UI）。现在，我使用这块code

I want to hide navigation bar permanently in my activity(not whole system ui). now i'm using this piece of code

getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);

它隐藏了吧，但是当用户触摸屏幕就显示了。有没有什么办法可以永久隐藏它，直到活动的onStop（）;

答

代码片段：

FullScreenFragment.java

HideNavigationBarComponent.java

这是Android的 4.4 +

This is for Android 4.4+

试用身临其境的模式 https://developer.android.com/training/系统UI / immersive.html

快速片段（对于活动类）：

private int currentApiVersion;

@Override
@SuppressLint("NewApi")
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    currentApiVersion = android.os.Build.VERSION.SDK_INT;

    final int flags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
        | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
        | View.SYSTEM_UI_FLAG_FULLSCREEN
        | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;

    // This work only for android 4.4+
    if(currentApiVersion >= Build.VERSION_CODES.KITKAT)
    {

        getWindow().getDecorView().setSystemUiVisibility(flags);

        // Code below is to handle presses of Volume up or Volume down.
        // Without this, after pressing volume buttons, the navigation bar will
        // show up and won't hide
        final View decorView = getWindow().getDecorView();
        decorView
            .setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener()
            {

                @Override
                public void onSystemUiVisibilityChange(int visibility)
                {
                    if((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0)
                    {
                        decorView.setSystemUiVisibility(flags);
                    }
                }
            });
    }

}


@SuppressLint("NewApi")
@Override
public void onWindowFocusChanged(boolean hasFocus)
{
    super.onWindowFocusChanged(hasFocus);
    if(currentApiVersion >= Build.VERSION_CODES.KITKAT && hasFocus)
    {
        getWindow().getDecorView().setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
    }
}

如果您有问题，当你preSS增大音量或降低音量，你的导航栏中显示。我加了code。在的onCreate 看 setOnSystemUiVisibilityChangeListener 一>

If you have problems when you press Volume up or Volume down that your navigation bar show. I added code in onCreate see setOnSystemUiVisibilityChangeListener

下面是另外一个相关的问题：

Here is another related question:

Immersive模导航成为后容积preSS或最小化，还原

如何隐藏导航栏永久Android的活动？

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