Android屏蔽home键

Android屏蔽home键 博客分类: , Android技术 Android 在activity中加上下面这段代码就可以屏蔽home Java代码 1. @Override 2. public boolean onKeyDown(int keyCode, KeyEvent event) 3. { 4. // TODO Auto-generated method stub 5. // 按下键盘上返回按钮 6. 7. if (keyCode == KeyEvent.KEYCODE_HOME) 8. { 9. Log.i("TAG","home"); 10. System.exit(0); 11. return true; 12. } 13. else 14. return super.onKeyDown(keyCode, event); 15. 16. } 前提是，要重写onAttachedToWindow()这个方法。 Java代码 1. @Override 2. public void onAttachedToWindow() 3. { 4. this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DI ALOG); 5. super.onAttachedToWindow(); 6. } 因为android系统自己对home键在PhoneWindowManager中做了处理，不会返回到上层应 用。查看源代码: \frameworks\policies\base\phone\com\android\internal\policy\impl\PhoneWindowManager.java 1089行 Java代码 1. if (code == KeyEvent.KEYCODE_HOME) { 2. // If a system window has focus, then it doesn't make sense 3. // right now to interact with applications. 4. WindowManager.LayoutParams attrs = win != null ? win.getAttrs() : null; 5. if (attrs != null) { 6. final int type = attrs.type; 7. if (type == WindowManager.LayoutParams.TYPE_KEYGUARD 8. || type == WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG ) { 9. // the "app" is keyguard, so give it the key 10. return false; 11. } 12. final int typeCount = WINDOW_TYPES_WHERE_HOME_DOESNT_WORK .length; 13. for (int i=0; i表

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