Android dialog 去除虚拟按键的解决方法

setContentView(R.layout.activity_main);之前添加

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

getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(new OnSystemUiVisibilityChangeListener() {
  @Override
  public void onSystemUiVisibilityChange(int 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 |= 0x00001000;
    } else {
      uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
    }
    getWindow().getDecorView().setSystemUiVisibility(uiOptions);
  }
});

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 |
        //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 |= 0x00001000;
    } else {
      uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
    }
    mDialog.getWindow().getDecorView().setSystemUiVisibility(uiOptions);
  }
});要在mDialog.show();之前。