我对Android 2.1的应用程序的建筑，我想覆盖后退按钮。

I have an application building against Android 2.1 and I want to override the back button.

我跟这里的例子：

http://android-developers.blogspot.com/2009_12_01_archive.html

和我的code是如下：

And my code is as follows:

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)  {
        if (Integer.parseInt(android.os.Build.VERSION.SDK) < 5
                && keyCode == KeyEvent.KEYCODE_BACK
                && event.getRepeatCount() == 0) {
            Log.d("CDA", "onKeyDown Called");
            onBackPressed();
        }

        return true;
    }

    @Override
    public void onBackPressed() {
    Log.d("CDA", "onBackPressed Called");
        Intent setIntent = new Intent(Intent.ACTION_MAIN);
        setIntent.addCategory(Intent.CATEGORY_HOME);
        setIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(setIntent); 

        return;
    }   

它适用于pre 2.x的设备，但没有一个英雄2.1更新-1和Nexus One的2.2工作。

It works on pre 2.x devices but doesn't work on a Hero with 2.1 update-1 and a Nexus One with 2.2.

有somwthing我从这个例子里缺？或者，任何人都可以指出为什么它不工作？

Is there somwthing I am missing from the example? Or can anyone point out why it isn't working?

我不甚至可以按钮pressed在logcat中。

I dont even get the button pressed in the logcat.

推荐答案

您使用的的onkeyup（）

使用刚的onkeydown（）在Android的1.x或 onBack pressed（）在安卓2.X

Use just onKeyDown() in Android 1.x or onBackPressed() in Android 2.x