使用全屏对话框时如何隐藏导航栏 [英] How to Hide Navigation Bar When Using Full Screen Dialog

问题描述

我正在使用全屏‍ Dialog以全屏模式显示ExoPlayer视频.我已经在托管Dialog的Activity的onCreate方法中使用以下代码来隐藏Navigation Bar.

I am using a full-screen ‍Dialog to show ExoPlayer video in full screen mode. I am already using the following code in the onCreate method of the Activity hosting the Dialog to hide the Navigation Bar.

public class BaseActivity extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //Hide the navigation bar in the beginning
        final View decorView = getWindow().getDecorView();
        int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN;
        decorView.setSystemUiVisibility(uiOptions);

        //Set a system bar visibility change listener
        decorView.setOnSystemUiVisibilityChangeListener(
                new View.OnSystemUiVisibilityChangeListener() {
                    @Override
                    public void onSystemUiVisibilityChange(int visibility) {
                        if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
                            decorView.setSystemUiVisibility(
                                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                                            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
                        }
                    }
                }
        );


    }
}

问题在于，对话框打开后，导航栏就会出现，而我无法将其隐藏.

The problem is that as soon as the dialog opens the navigation bar appears and I cannot hide it.

private void openFullScreenDialog() {
    ((ViewGroup) mExoPlayerView.getParent()).removeView(mExoPlayerView);
    mFullScreenDialog.addContentView(mExoPlayerView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
    mFullScreenIcon.setImageDrawable(ContextCompat.getDrawable(PlaybackActivity.this, R.drawable.ic_fullscreen_exit));
    mExoPlayerFullScreen = true;
    mFullScreenDialog.show();
    getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
    | View.SYSTEM_UI_FLAG_FULLSCREEN);
}

无论对话框或setSystemUiVisibility()使用什么选项，都会出现导航栏.

The navigation bar appears no matter what options I use for the dialog or setSystemUiVisibility().

推荐答案

执行以下操作:

decorView.setOnSystemUiVisibilityChangeListener(
        new View.OnSystemUiVisibilityChangeListener() {
            @Override
            public void onSystemUiVisibilityChange(int visibility) {
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
                getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);

            }
        }
);

也可以重写此方法:

@Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus) {
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);

        }
    }

这篇关于使用全屏对话框时如何隐藏导航栏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！