动态创建按钮和设置onClickListener [英] Dynamically creating Buttons and setting onClickListener

问题描述

我有问题，处理动态创建按钮在Android上。我创建N个按钮和我做同样的方法被点击按钮的时候，但我必须知道被点击的按钮。

I have problem with handling dynamically created Buttons on Android. I'm creating N buttons and I have to do the same method when button is clicked but I have to know which button is clicked.

for (int i = 0; i < NO_BUTTONS; i++){
        Button btn = new Button(this);
        btn.setId(2000+i);

        ...

        btn.setOnClickListener((OnClickListener) this);
        buttonList.addView(btn);
        list.add(btn);

Cucurrently我加入ID为每一个按钮，我用下面的方法，看哪个按钮被点击。 （行 btn.setId（2000 + I）; 和 btn.setOnClickListener（（OnClickListener）本）; ）。这种方法也可以实现在活动。

Cucurrently I'm adding ID to every button and I'm using the method below to see which button was clicked. (line btn.setId(2000+i); and btn.setOnClickListener((OnClickListener) this);). This method is also implemented in the activity.

@Override
public void onClick(View v) {
    switch (v.getId()){
        case 2000: selectButton(0);
        break;

        ...

        case 2007: selectButton(7);
        break;
    }
 }

这看起来并不好我，所以我要问有没有一些更好的方式来做到这一点？或如何发送一些信息给onclick事件？有什么建议？

This doesn't look good to me so i'm asking is there some better way to do this? or how to send some information to onclick event? any suggestions?

推荐答案

您可以创建一个返回onclickListener，并采取一个按钮作为参数的方法。然后使用该方法来设置onClicklistener在你的第一个循环。

You could create a method that returns an onclickListener and takes a button as a parameter. And then use that method to set the onClicklistener in the first loop you have..

更新：code可能是soemthing沿着这些路线：

Update: code could be soemthing along these lines:

View.OnClickListener getOnClickDoSomething(final Button button)  {
    return new View.OnClickListener() {
        public void onClick(View v) {
            button.setText("text now set.. ");    
        }
    };
}

如在活性的方法，然后用它在这样的环

as a method in the activity and then use it in the loop like this

button.setOnClickListener(getOnClickDoSomething(button));

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