Android dialog 去除虚拟按键

Android 部分机型没有物理按键，只有虚拟按键，Activity全屏方法如下：

1、在

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

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

 2、当用户划出虚拟按键后，自动再隐藏方法如下：

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);
    }
});

3、dialog 隐藏方法

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。