android 4.0 屏蔽 HOME_KEY 和 RECENT_APP_KEY
16lz
2021-01-26
在项目中需要屏蔽虚拟按键，back 和menu键可以屏蔽，但是HOME_KEY 和 RECENT_APP_KEY 却无法屏蔽，在 onKeyDown(int keyCode, KeyEvent event) 方法中不能捕获HOME_KEY 和 RECENT_APP_KEY 的动作。
1、屏蔽HOME_KEY
参考网站http://www.2cto.com/kf/201207/138886.html
在/frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java(拦截消息的处理类)
的interceptKeyBeforeDispatching() 方法中做修改
public static final int FLAG_HOMEKEY_DISPATCHED = 0x80000000;// 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 0; } final int typeCount = WINDOW_TYPES_WHERE_HOME_DOESNT_WORK.length; for (int i=0; i在应用中设置以下代码
public static final int FLAG_HOMEKEY_DISPATCHED = 0x80000000;public void onAttachedToWindow() {getWindow().addFlags(FLAG_HOMEKEY_DISPATCHED);super.onAttachedToWindow();}并在onKeyDown(int keyCode, KeyEvent event) 中返回true。屏蔽了HOME键。
2、屏蔽RECENT_APP_KEY
在PhoneWindowManager.java(拦截消息的处理类) 的interceptKeyBeforeDispatching() 方法中，RECENT_APP_KEY的事件不能截取。屏蔽RECENT_APP_KEY只能另想办法。
参考http://blog.csdn.net/yihongyuelan/article/details/7623578
在/frameworks/base/packages/SystemUI 中的TabletStatusBar.java （平板的StatusBar）。发现在类中存在一个广播类，添加一个屏蔽的动作和一个取消屏蔽的动作。达到通过广播去控制recentApp的动作是否响应。
protected View makeStatusBarView() {......// receive broadcasts IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS); filter.addAction(Intent.ACTION_SCREEN_OFF);//增加开关动作 filter.addAction(ACTION_DISABLE_RECENT_BUTTON); filter.addAction(ACTION_ENABLE_RECENT_BUTTON); context.registerReceiver(mBroadcastReceiver, filter); return sb;} private boolean disableRecentButton = false; private static final String ACTION_DISABLE_RECENT_BUTTON = "action_disable_recent_button"; private static final String ACTION_ENABLE_RECENT_BUTTON = "action_enable_recent_button"; private View.OnClickListener mOnClickListener = new View.OnClickListener() { public void onClick(View v) { if (v == mRecentButton) { if (!disableRecentButton) {//recentApp 动作处理 onClickRecentButton();} } else if (v == mInputMethodSwitchButton) { onClickInputMethodSwitchButton(); } else if (v == mCompatModeButton) { onClickCompatModeButton(); } }};private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action) || Intent.ACTION_SCREEN_OFF.equals(action)) { boolean excludeRecents = false; if (Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action)) { String reason = intent.getStringExtra("reason"); if (reason != null) { excludeRecents = reason.equals("recentapps"); } } if (Intent.ACTION_SCREEN_OFF.equals(action)) { // If we're turning the screen off, we want to hide the // recents panel with no animation // TODO: hide other things, like the notification tray, // with no animation as well mRecentsPanel.show(false, false); excludeRecents = true; } animateCollapse(excludeRecents); } //增加开关动作 else if (ACTION_DISABLE_RECENT_BUTTON.equals(action)){ disableRecentButton = true; } else if (ACTION_ENABLE_RECENT_BUTTON.equals(action)){ disableRecentButton = false; } } };最后在应用中添加以下代码就可以屏蔽了RECNET_APP_KEY
private static final String ACTION_DISABLE_RECENT_BUTTON = "action_disable_recent_button"; private static final String ACTION_ENABLE_RECENT_BUTTON = "action_enable_recent_button";@Overrideprotected void onResume() {super.onResume();Intent intent = new Intent(ACTION_DISABLE_RECENT_BUTTON);sendBroadcast(intent);}@Overrideprotected void onPause() {Intent intent = new Intent(ACTION_ENABLE_RECENT_BUTTON);sendBroadcast(intent);super.onPause();}更多相关文章
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