我怎样才能建立在物理菜单按钮，长时间触摸事件？ [英] How can I create a long touch event on the physical menu button?

问题描述

现在，当你按住菜单按钮，在Android设备上它拉起来柔软keyboard.Is有没有办法覆盖此？我宁愿选择在长触摸此按钮会发生什么。

Right now when you hold down the menu button on my android device it pulls up a soft keyboard.Is there a way to override this? I would rather choose what happens on a long touch of this button.

在使用onKeyLong preSS它，只有当后退按钮不放检测。我怎样才能使这项工作的菜单按钮？

When using onKeyLongPress it only detects when the "Back" button is held down. How can I make this work for the menu button?

推荐答案

有关这一点，你可以使用 onKeyLong $ P $（PSS） -method，由提供 KeyEvent.Callback 级（可在活动的被使用过，因为它们的子类的 KeyEvent.Callback - 类）。

For this, you can use the onKeyLongPress()-method, offered by the KeyEvent.Callback-class (can be used in Activity's too, since they are a subclass of the KeyEvent.Callback-class).

还有一个小窍门，使这项工作：你要告诉Android的跟踪长期preSS点击菜单 - 按钮为 onKeyLong $ P $ （PSS） -method不会被触发，否则。这是在正常完成的onkeydown（） -method。

There is also a little trick to make this work: You'll have to tell Android to track a long-press click on the "Menu"-button as the onKeyLongPress()-method will not be triggered otherwise. This is done in the normal onKeyDown()-method.

所以你的code可能是这样的：

So your code might look like this:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if (keyCode == KeyEvent.KEYCODE_MENU) {
        // this tells the framework to start tracking for
        // a long press and eventual key up.  it will only
        // do so if this is the first down (not a repeat).
        event.startTracking();
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

@Override
public boolean onKeyLongPress(int keyCode, KeyEvent event){
    if (keyCode == KeyEvent.KEYCODE_MENU){
        // Do what you want...
        Toast.makeText(this, "I'm down!", Toast.LENGTH_SHORT).show();
        return true;
    }
    return super.onKeyLongPress(keyCode,event);
}

一个伟大的与文章进一步的信息可以在Android开发者博客上找到。

A great article with further informations can be found on the Android Developer Blog.

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