Android 中屏蔽 Home 键

港控/mmm° 2022-06-15 06:07 709阅读 0赞

原文：[http://www.cnblogs.com/newcj/articles/2066337.html][http_www.cnblogs.com_newcj_articles_2066337.html]

public void onAttachedToWindow()
    {  
           this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);     
           super.onAttachedToWindow(); 	
    }

在activity中加上这段代码就可以屏蔽home，至于为什么，因为android系统自己对与home键power键在PhoneWindowManager中做了处理，不会返回到上层应用的，但是我在看这部分代码的时候看到：

\frameworks\policies\base\phone\com\android\internal\policy\impl\PhoneWindowManager.java 1089行
     
    if (code == KeyEvent.KEYCODE_HOME) {
     
                // If a system window has focus, then it doesn't make sense
                // right now to interact with applications.
                WindowManager.LayoutParams attrs = win != null ? win.getAttrs() : null;
                if (attrs != null) {
                    final int type = attrs.type;
                    if (type == WindowManager.LayoutParams.TYPE_KEYGUARD
                            || type == WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG) {
                        // the "app" is keyguard, so give it the key
                        return false;
                    }
                    final int typeCount = WINDOW_TYPES_WHERE_HOME_DOESNT_WORK.length;
                    for (int i=0; i<typeCount; i++) {
                        if (type == WINDOW_TYPES_WHERE_HOME_DOESNT_WORK[i]) {
                            // don't do anything, but also don't pass it to the app
                            return true;
                        }
                    }
                }

type == WindowManager.LayoutParams.TYPE\_KEYGUARD这一句，我们可以看到，android对于锁屏特殊判断了，所以我就模拟这个进行的实现，只是有一点，activity中重写onAttachedToWindow（）方法需要api 5以上。

[http_www.cnblogs.com_newcj_articles_2066337.html]: http://www.cnblogs.com/newcj/articles/2066337.html