动态地将 Spinner 添加到 RelativeLayout [英] Add a Spinner to a RelativeLayout dynamically

问题描述

我正在尝试向 RelativeLayout 动态添加微调器，但我遇到了问题.这是我的代码.

I am trying to add a spinner dynamically to a RelativeLayout but I am having problems. This is my code.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
 xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="@+id/Relativ"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

</RelativeLayout>

在我的课堂上:

    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    RelativeLayout rl = (RelativeLayout) findViewById(R.id.Relativ);

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,1);
    adapter.add("1");
    adapter.add("2");
    adapter.add("3");
    adapter.add("4");
    adapter.add("5");

    Spinner list = new Spinner(this);
    list.setAdapter(adapter);
    rl.addView(list);
    }

但它没有运行.我想知道我的代码有什么问题以及如何修复它.我在 RelativeLayout.addView 中尝试过使用 RelativeLayout 参数，但它没有运行.谢谢.

But it does't run. I would like to know what is wrong in my code and how I can fix it. I have tryed with RelativeLayout params in the RelativeLayout.addView and it doesn't run. Thank you.

推荐答案

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    RelativeLayout rl = new RelativeLayout(this);
    ArrayList<String> arrayList = new ArrayList<String>();
    arrayList.add("1");
    arrayList.add("2");
    arrayList.add("3");
    arrayList.add("4");
    arrayList.add("5");

    Spinner list = new Spinner(this);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_spinner_dropdown_item, arrayList);
    list.setAdapter(adapter);
    rl.addView(list);
    setContentView(rl);
}

这篇关于动态地将 Spinner 添加到 RelativeLayout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IT屋！