Android Studio布局错误(Android Studio Layout Errors)

 嘿，我真的需要你的帮助。 
 
 我的问题是Android Studio不会在模拟器或物理设备中正确显示布局。 每当我放置一个textView，按钮等，我想将它居中（水平，垂直或两者），然后我启动模拟器它就会粘在左上角。 
 
 这是我的代码:: 
 
private void firstStage(){
    ViewGroup container = (ViewGroup) findViewById(R.id.container);
    container.removeAllViews();
    container.addView(getLayoutInflater().inflate(R.layout.first_stage, null));
}


private void showHint(){
    ViewGroup container = (ViewGroup) findViewById(R.id.container);
    container.removeAllViews();
    container.addView(getLayoutInflater().inflate(R.layout.first_hint, null));
    firstImage = (ImageView) findViewById(R.id.hintImage);
    firstImage.setImageResource(R.drawable.firsthint);
    Button back = (Button) findViewById(R.id.first_hint_backButton);
    back.setOnClickListener(this);


}
 
 在showHint方法中一切正常..按钮和imageview是我设置它们的地方。 
 
 在firstStage方法中，我有一个textView，如果我选择带有“center”的东西，它总是在左上角，就像Android Studio突然无法处理重力：中心了。 
 
 我尝试创建一个新项目，但错误仍然发生。 如果我将textView设置为右侧，然后将其放在右边的中间，则可以正常工作。 但这不是一个长期的解决方案。 你有没有人遇到过同样的问题？ 
 
 在你问之前，是的，我用“中心”尝试了一切。 在XML文件中，在代码中等等。 
 
 也许这也会对你有所帮助:: 
 
 如果我通过setContentView（R.layout.first_stage）调用布局; 有用。 textView就在那里我想要它...我只是不知道为什么它不再适用于ViewGroup，当它完全适用于我的其他2个布局？！ 
 
 这是我的布局代码:: 
 
<?xml version="1.0" encoding="utf-8"?>
 
 RelativeLayout xmlns：android =“http://schemas.android.com/apk/res/android”android：layout_width =“match_parent”android：layout_height =“match_parent” 
 
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="@string/first_stage"
    android:id="@+id/textView2"
    android:enabled="true"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />
 
 / RelativeLayout的 
 
 编辑：： 
 
 它现在有效!! 我将容器从RelativeLayout更改为FrameLayout。 我不知道为什么它现在有效，但它的确有效！ 
 
 感谢pdegand59的快速帮助，真的很感激。 

Hey I really need your help.
 
My problem is that Android Studio will not display the Layout correctly in the emulator or physical device. Whenever i place a textView, button etc. and i want to center it (horizontally, vertically or both), and i start the emulator it's stuck to the top left corner.
 
This is my code::
 
private void firstStage(){
    ViewGroup container = (ViewGroup) findViewById(R.id.container);
    container.removeAllViews();
    container.addView(getLayoutInflater().inflate(R.layout.first_stage, null));
}


private void showHint(){
    ViewGroup container = (ViewGroup) findViewById(R.id.container);
    container.removeAllViews();
    container.addView(getLayoutInflater().inflate(R.layout.first_hint, null));
    firstImage = (ImageView) findViewById(R.id.hintImage);
    firstImage.setImageResource(R.drawable.firsthint);
    Button back = (Button) findViewById(R.id.first_hint_backButton);
    back.setOnClickListener(this);


}
 
In the showHint Method everything works fine.. the button and imageview are there where i have set them.
 
In the firstStage method however i have a textView and it is always in the top left corner if I choose something with "center", like Android Studio suddenly can't handle gravity:center anymore. 
 
I tried it with creating a new project but the error still occurs. If i set the textView to the right side and then put it in the middle with margin-right, it works. But that is not really a long-term solution. Did anyone of you experience the same problem?
 
And before you ask, Yes i have tried everything with "center". In the XML- file, in the code and so on.
 
Maybe this will also help you::
 
If i call the layout via setContentView(R.layout.first_stage); it works. The textView is right in there where i want it to be.. I just don't know why it won't work with ViewGroup anymore, when it works perfectly for my other 2 Layouts?! 
 
This is my Layout-Code:: 
 
<?xml version="1.0" encoding="utf-8"?>
 
RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"
 
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="@string/first_stage"
    android:id="@+id/textView2"
    android:enabled="true"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />
 
/RelativeLayout
 
EDIT::
 
It works now!! I changed the container from being a RelativeLayout to a FrameLayout. I don't know exactely why it works now, but it works!!!
 
Thanks to pdegand59 for the fast help, really appreciate it. 

原文：https://stackoverflow.com/questions/31650687