安卓：如何读取按钮触摸表？ [英] Android: How to read button touches in table?

问题描述

什么是在按钮（自定义键盘）的表来测试按钮触摸的正确方法？对于每个按钮OnTouch听众似乎很麻烦。

What's the correct way to test for button touches in a table of buttons (custom keypad)? OnTouch Listeners for every button seems cumbersome.

推荐答案

这不是累赘。不过，我会建议使用同一个侦听为他们所有。的（这是使用 OnTouchListener ; OnClickListener 可能是你的情况更好）的

It's not cumbersome. However I would suggest using the same listener for all of them. (And this is using OnTouchListener; OnClickListener may be better in your case.)

public class MyButtonTouchListener implements OnTouchListener {
    @Override
    public boolean onTouch(View v, MotionEvent ev) {
        Button b = (Button) v;
        String buttonText = b.getText().toString();
        // Do whatever, based on buttonText. Example: if (buttonText.equals("#")) { doPound(); }
    }
}

然后，创建这些项目中的一个，并将其分配给所有的人。

Then, you create one of these items, and assign it to all of them.

MyButtonTouchListener listener = new MyButtonTouchListener();
ArrayList<Button> myButtons = new ArrayList<Button>();
// Add all your Button objects to the ArrayList.
for (Button b : myButtons)
    b.setOnTouchListener(listener);

现在，您的听众只有一次在内存中出现，并且每个项目仍具有独特的功能。

Now, your listener only appears once in memory, and each item still has unique functionality.

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