如何从android隐藏导航栏

Question

如何从android隐藏导航栏？我可以从布局中隐藏标题栏。但是当我在设备中运行应用程序时，我仍然看到导航栏。这可以隐藏导航栏吗？

Answer 1

试试这个

View aView = getWindow().getDecorView();
aView.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);

但我建议您先阅读Link

我发现这也值得一读link

Answer 2

在您的活动中尝试以下代码：

View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
              | View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);

请参阅：https://developer.android.com/training/system-ui/navigation.html

Answer 3

你可以使用它

@Override

@SuppressLint（＆＃34; NewApi＆＃34） 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);
}

}