android - 在 android 中阻止后退按钮

Question

我想阻止 android 中的硬件后退按钮，以防止返回到其他 Activity .. 提前致谢...

Answer 1

以下代码可让您在平台的所有版本上正确处理 Activity 中的返回键:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if (  Integer.valueOf(android.os.Build.VERSION.SDK) < 7 //Instead use android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.ECLAIR
            && keyCode == KeyEvent.KEYCODE_BACK
            && event.getRepeatCount() == 0) {
        // Take care of calling this method on earlier versions of
        // the platform where it doesn't exist.
        onBackPressed();
    }

    return super.onKeyDown(keyCode, event);
}

@Override
public void onBackPressed() {
    // This will be called either automatically for you on 2.0
    // or later, or by the code above on earlier versions of the
    // platform.
    return;
}

来源:http://android-developers.blogspot.com/2009/12/back-and-other-hard-keys-three-stories.html