使用Kotlin将运行时余量设置为任何视图 [英] Set runtime margin to any view using Kotlin

问题描述

我是Kotlin的初学者.我不太熟悉这种语言.我正在举一个例子，玩代码.我只想将运行时余量设置为任何视图.我也尝试用Google搜索它，但没有为此任务找到任何合适的解决方案.

I am a beginner in Kotlin .I am not too much familier with this language. I am making one example and playing with code. I Just want to set runtime margin to any view. I also trying to google it but not getting any proper solution for this task.

要求

将运行时裕量设置为任何视图.

Set runtime margin to any View.

说明

我获取了一个包含在Button上的xml文件，我想将此按钮的运行时裕度设置为

I have taking one xml file which is contain on Button and I want to set runtime margin to this button.

代码

我也尝试下面的方法，但这是行不通的.

I also try below thing but it's not work.

class MainActivity : AppCompatActivity() {


//private lateinit var btnClickMe: Button
//var btnClickMe=Button();

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        //For setting runtime text to any view.
        btnClickMe.text = "Chirag"

        //For getting runtime text to any view
        var str: String = btnClickMe.text as String;

        //For setting runtimer drawable
       btnClickMe.background=ContextCompat.getDrawable(this,R.drawable.abc_ab_share_pack_mtrl_alpha)//this.getDrawable(R.drawable.abc_ab_share_pack_mtrl_alpha)


        /*
        //For Setting Runtime Margine to any view.
        var param:GridLayout.LayoutParams
        param.setMargins(10,10,10,10);

        btnClickMe.left=10;
        btnClickMe.right=10;
        btnClickMe.top=10;
        btnClickMe.bottom=10;
        */

        // Set OnClick Listener.
        btnClickMe.setOnClickListener {
            Toast.makeText(this,str,5000).show();
        }

    }

}

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:orientation="vertical"
tools:context="chirag.iblazing.com.stackoverflowapp.MainActivity"
android:layout_height="match_parent">

<Button
    android:id="@+id/btnClickMe"
    android:text="Click Me"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

</LinearLayout>

我该如何进行?

推荐答案

您需要从按钮获取layoutParams对象，并将其强制转换为ViewGroup.MarginLayoutParams(这是

You need to get the layoutParams object from button and cast it to ViewGroup.MarginLayoutParams (which is a parent class of LinearLayout.LayoutParams, RelativeLayout.LayoutParams and others and you don't have to check which is btnClickMe's actual parent) and set margins to whatever you want.

检查以下代码:

val param = btnClickMe.layoutParams as ViewGroup.MarginLayoutParams
param.setMargins(10,10,10,10)
btnClickMe.layoutParams = param // Tested!! - You need this line for the params to be applied.

希望有帮助.

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