如何prevent方向的改变只是一个布局，而不是整个屏幕/活动

问题描述

我需要一个子布局（可以是任何布局，如的FrameLayout 或 RelativeLayout的）忽略方向改变和横向始终保持。但不是其父母或其他兄弟姐妹的布局/意见，就应该相应地改变其方向。

因此​​，我不能使用 setRequestedOrientation（）或的android：screenOrientation =风景。或将锁定方向对整个屏幕或活性。我需要锁定才刚刚这个单一的布局。

我的布局XML：

  RelativeLayout的（家长）
  TextView中
    的FrameLayout / RelativeLayout的＆下;  - 这需要被锁定
      的FrameLayout
        按键
 

解决方案

这可能取决于你所说的不改变方向的意思。不过，我觉得开始是创建自己的类不应该改变的一部分最好的地方。因此，布局XML现在有两个文件：

main_layout.xml

  RelativeLayout的（家长）
    TextView中
        MyNonChangingLayout
 

my_non_changing_layout.xml

 的RelativeLayout
     的FrameLayout
         按键
 

您已经创建

  MyNonChangingLayout延伸的FrameLayout {
    MyNonchangingLayout（上下文内容）{
        超级（上下文）;
        myContext =背景;
        makeFromXML（）;
    }私人无效makeFromXML（）{
    LayoutInflater吹气=（LayoutInflater）myContext.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
    冠捷= inflater.inflate（MyR.layout.my_non_changing_layout，这一点，假）;    //获取这里的所有子视图中使用topView.findViewById（）    //执行查看其他任何启动你需要在这里    //确保你这个否则它不会实际出现！
    super.addView（冠捷）;
}/ *
 *然后，您可以覆盖相当多的布局的电话和
 *加强对孩子的行为。两个例子：
 * ///为了专门捕获方向变化
@Overridge
onConfigurationChanged（配置NEWCONFIG）{
    super.onConfigurationChanged（NEWCONFIG）;
    //你可以通过删除所有意见，并重建他们在这里创建布局
    //也许由具有两个XML布局，其中一个是90度..​​.
    //如果你做layot​​这里，请确保您不构造code交锋！
    开关（newConfig.orientation）{
        案例ORIENTATION_LANDSCAPE：
            //使这个方向布局（根据上文）
            打破;
        案例ORIENTATION_PORTRAIT：
            //使这个方向布局（根据上文）
            打破;
        案例ORIENTATION_SQUARE：
            //使这个方向布局（根据上文）
            打破;
    }
}//处理大小的变化来执行对儿童的长宽比：
@override
保护无效onSizeChanged（INT W，INT小时，INT oldw，诠释oldh）{
    super.onSizeChanged（W，H，oldw，oldh）;    INT viewWidth = //事情我已经决定
    INT viewHeight = //事情我已经决定
    setViewsize（viewToHaveSizedControlled，viewWidth，viewheight）;
}//该职位的事情意味着它不会崩溃不管它是哪个线程
//上执行...
私人无效setViewsize（最终视图V，最终诠释W，最终诠释高）{
    后（新的Runnable（）{
        公共无效的run（）{
            ViewGroup.LayoutParams LP = v.getLayoutParams（）;
            lp.width = W;
            lp.height = H;
            v.setLayoutParams（LP）;
    }}）;
}
 

}

您可以再执行pretty你想好什么。如果你能具体谈谈要强制上分区域什么样的行为，我可能能够提出更具体的code。

有一件事情你可能会想要做的就是保持

I would need a child layout (can be any layout, like FrameLayout or RelativeLayout) to ignore orientation change and remain always in landscape orientation. But not its parent or any other sibling layouts/views, they should change their orientation accordingly.

Hence, I cannot use setRequestedOrientation() or android:screenOrientation="landscape". Or it will lock the orientation for the whole screen or the activity. I need to lock only just this single layout.

My layout XML:

RelativeLayout (Parent)
  TextView
    FrameLayout/RelativeLayout <-- this need to be locked
      FrameLayout
        Button

解决方案

It probably depends what you mean by "not change orientation". However, I think that best place to start would be to create your own class for the part that shouldn't change. So the layout xml now has two files:

main_layout.xml

RelativeLayout (Parent)
    TextView
        MyNonChangingLayout

my_non_changing_layout.xml

 RelativeLayout
     FrameLayout
         Button

Where you have created

MyNonChangingLayout extends FrameLayout {
    MyNonchangingLayout(Context content) {
        super(context);
        myContext = context;
        makeFromXML();
    }

private void makeFromXML() {
    LayoutInflater inflater = (LayoutInflater)myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    topView =  inflater.inflate(MyR.layout.my_non_changing_layout, this, false);

    // Get all the sub Views here using topView.findViewById()

    // Do any other initiation of the View you need here

    // Make sure you this otherwise it won't actually appear!
    super.addView(topView);
}

/*
 * Then, you can override quite a lot of the layout's calls and
 * enforce behaviour on the children. Two examples:
 */

// To specifically catch orientation changes
@Overridge
onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // You could create the layout here by removing all views and rebuilding them
    // Perhaps by having a two xml layouts, one of which is "90 degrees out" ...
    // If you do make the layot here, make sure you don't clash with the constructor code!
    switch (newConfig.orientation) {
        case ORIENTATION_LANDSCAPE:
            // Make the layout for this orientation (as per above)
            break;
        case ORIENTATION_PORTRAIT:
            // Make the layout for this orientation (as per above)
            break;
        case ORIENTATION_SQUARE:
            // Make the layout for this orientation (as per above)
            break;
    }
}

//to handle size changes to enforce aspect ratios on children:
@override
protected void onSizeChanged (int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);

    int viewWidth = //something I've determine
    int viewHeight = //something I've determined
    setViewsize(viewToHaveSizedControlled, viewWidth, viewheight);
}

// The post thing means that it doesn't crash no matter which thread it is
// executed on ...
private void setViewsize(final View v, final int w, final int h) {
    post(new Runnable() {
        public void run() {
            ViewGroup.LayoutParams lp = v.getLayoutParams();
            lp.width = w;
            lp.height = h;
            v.setLayoutParams(lp);
    }});
}

}

You can then enforce pretty well anything you want. If you can be more specific about what behaviour you want to enforce on the sub region I might be able to suggest more specific code.

One thing you may be wanting to do is to keep

这篇关于如何prevent方向的改变只是一个布局，而不是整个屏幕/活动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！