Solution of Android dialog Removing Virtual Keys

Some models of Android have no physical keys, only virtual keys. The full-screen method of Activity is as follows:

1. In

setContentView(R.layout.activity_main); Add before 

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

2. When the user draws the virtual key, the automatic re-hiding method is as follows:

getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(new OnSystemUiVisibilityChangeListener() {
  @Override
  public void onSystemUiVisibilityChange(int visibility) {
    int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
        // The layout is below the status bar 
        View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
        // Full screen 
        View.SYSTEM_UI_FLAG_FULLSCREEN |
        // Hide the navigation bar 
        View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
        View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
    if (Build.VERSION.SDK_INT >= 19) {
      uiOptions |= 0x00001000;
    } else {
      uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
    }
    getWindow().getDecorView().setSystemUiVisibility(uiOptions);
  }
});

3. dialog hiding method

mDialog.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
mDialog.getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(new OnSystemUiVisibilityChangeListener() {
  @Override
  public void onSystemUiVisibilityChange(int visibility) {
    int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
        // The layout is below the status bar 
        View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
        // Full screen 
        View.SYSTEM_UI_FLAG_FULLSCREEN |
        // Hide the navigation bar 
        View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
        View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
    if (Build.VERSION.SDK_INT >= 19) {
      uiOptions |= 0x00001000;
    } else {
      uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
    }
    mDialog.getWindow().getDecorView().setSystemUiVisibility(uiOptions);
  }
}); To be in mDialog.show(); Before.