android4.2 屏蔽home键

最新推荐文章于 2021-05-28 08:37:18 发布

原创最新推荐文章于 2021-05-28 08:37:18 发布 · 3.1k 阅读

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#4.2 屏蔽home #屏蔽home键

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本文介绍如何在Android应用中通过设置窗口属性来屏蔽和取消屏蔽Home键的功能，防止Home键触发默认行为。

WindowManager.java (frameworks\base\core\java\android\view)

中添加 public static final int FLAG_DISMISS_HOME_KEY = 0x02000000;

修改PhoneWindowManager.java (frameworks\base\policy\src\com\android\internal\policy\impl)

if (keyCode == KeyEvent.KEYCODE_HOME) {

            // If we have released the home key, and didn't do anything else
            // while it was pressed, then it is time to go home!
            if (!down && mHomePressed) {//红色为添加部分
                final boolean homeWasLongPressed = mHomeLongPressed;
                mHomePressed = false;

..........

WindowManager.LayoutParams attrs = win != null ? win.getAttrs() : null;
            if (attrs != null) {
                final int type = attrs.type;
              final int flag = attrs.flags;
                final int homeKeyFlag = flag & WindowManager.LayoutParams.FLAG_DISMISS_HOME_KEY;
                     if (type == WindowManager.LayoutParams.TYPE_KEYGUARD
                        || type == WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG
                        || homeKeyFlag == WindowManager.LayoutParams.FLAG_DISMISS_HOME_KEY) {
                    // the "app" is keyguard, so give it the key
                    return 0;
               }

如果在上层app中想屏蔽home键，只需要添加

import android.view.WindowManager;

this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_HOME_KEY);

解除home键屏蔽添加

this.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DISMISS_HOME_KEY);