Android 2.3状态栏中添加menu,home和back快捷键的方.doc

在Android 2.3状态栏中添加menu，home和back快捷键的方法1、准备资源，修改XML文准备几张图，这里我们准备添加home back和menu图标，就需要准备6张图，三张普通状态，三张按下的高亮状态图标：stat_home.pngstat_home_pressed.pngstat_back.pngstat_back_pressed.pngstat_menu.pngstat_menu_pressed.png把它们放在frameworks/base/packages/SystemUI/res/drawable/目录下同时，在frameworks/base/packages/SystemUI/res/drawable 下创建三个imageButton的xml文件xml_stat_home.xml1. 2. 4. 8. 12. 16. 18. xml_stat_back.xml1. 2. 4. 8. 12. 16. 18. xml_stat_menu.xml1. 2. 4. 8. 12. 16. 18. 修改status_bar.xml成如下目录：frameworks/base/packages/SystemUI/res/layout/status_bar.xml1. 2. 20. 21. 22. 29. 30. 34. 42. 43. 50. 60. 71. 82. 90. 91. 92. 98. 33.143.二 为按钮添加动态效果修改frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarView.java在类中新增加四个成员（须导入android.widget.ImageButton和android.content.Context）：1. ImageButtonmHomeBtn;2. ImageButtonmBackBtn;3. ImageButtonmMenuBtn;4. final Context mContext;增加三个常量：(须导入android.view.KeyEvent;)public static final int RESV_KEY_HOME = KeyEvent.KEYCODE_HOME;public static final int RESV_KEY_BACK = KeyEvent.KEYCODE_BACK;public static final int RESV_KEY_MENU = KeyEvent.KEYCODE_MENU;在构造函数StatusBarView中初始化mContext1. public StatusBarView(Context context, AttributeSet attrs) 2. super(context, attrs);3. mContext=context;4. 注意”mContext=context;”须在”super(context, attrs);”后面，不然编译会报错在onFinishInflate中，获取几个button 的handler，并设置touch事件，添加如下代码：1. mHomeBtn=(ImageButton)findViewById(R.id.go_home);2. mBackBtn=(ImageButton)findViewById(R.id.go_back);3. mMenuBtn=(ImageButton)findViewById(R.id.pop_menu);4. 5. mHomeBtn.setOnTouchListener(homeOnTouch);6. mBackBtn.setOnTouchListener(backOnTouch);7. mMenuBtn.setOnTouchListener(menuOnTouch);各button的touch事件添加如下：1. voidsendIntent(Intentintent)2. 3. mContext.sendBroadcast(intent);4. 5. privatevoidsendKeyIntent(intkeycode)6. Intentintent=newIntent(Intent.ACTION_ICONKEY_CHANGED);7. intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);8. intent.putExtra(keycode,keycode);9. sendIntent(intent);10. 11. 12. privateOnTouchListenerhomeOnTouch=newOnTouchListener()13. /Override14. publicbooleanonTouch(Viewv,MotionEventevent)15. 16. /TODOAuto-generatedmethodstub17. switch(event.getAction()18. caseMotionEvent.ACTION_UP:19. 20. sendKeyIntent(RESV_KEY_HOME);21. 22. break;23. 24. returnfalse;25. 26. ;27. 28. privateOnTouchListenerbackOnTouch=newOnTouchListener()29. /Override30. publicbooleanonTouch(Viewv,MotionEventevent)31. 32. /TODOAuto-generatedmethodstub33. switch(event.getAction()34. caseMotionEvent.ACTION_UP:35. 36. sendKeyIntent(RESV_KEY_BACK);37. 38. break;39. 40. returnfalse;41. 42. ;43. 44. privateOnTouchListenermenuOnTouch=newOnTouchListener()45. /Override46. publicbooleanonTouch(Viewv,MotionEventevent)47. 48. /TODOAuto-generatedmethodstub49. switch(event.getAction()50. caseMotionEvent.ACTION_UP:51. 52. sendKeyIntent(RESV_KEY_MENU);53. 54. break;55. 56. returnfalse;57. 58. ;为防止点击statusBar上的按钮， 触发标题栏的expend事件， 修改一下函数onInterceptTouchEvent，点击到不属于button区域时才允许解析Motion的event：1. publicbooleanonInterceptTouchEvent(MotionEventevent)2. if(event.getX()mHomeBtn.getRight()3. &(event.getX()mMenuBtn.getLeft()4. returnmSerceptTouchEvent(event)5. ?true:super.onInterceptTouchEvent(event);6. 7. returnfalse;8. /returnmSerceptTouchEvent(event)9. /?true:super.onInterceptTouchEvent(event);10. 11. 需要自己添加Intent打开frameworks/base/core/java/android/content/Intent.java，增加下面的内容，由于我们的使用的API不公开，须加上/*hide*/，不然编译会报错1. /*2. * hide3. */ 4. public static final String ACTION_ICONKEY_CHANGED =ent.action.ICONKEY_CHANGED;5. 接收并处理intent修改StatusBarPolicy.java目录:frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarPolicy.java首先在构造函数中加入Intent的filter，注册号这个intent的receiver。filter.addAction(Intent.ACTION_ICONKEY_CHANGED); 接着在private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() 加入Intent的receiver动作;1. elseif(action.equals(Intent.ACTION_ICONKEY_CHANGED)2. Log.d(TAG,ReceivedACTION_ICONKEY_CHANGED);3. updateIconKeyAction(intent);4. 及处理函数：须导入以下包import android.view.IWindowManager;import android.os.SystemClock;import android.view.KeyEvent;1. privatefinalvoidupdateIconKeyAction(Intentintent)2. intkeycode=intent.getIntExtra(keycode,-1);3. IWindowManagerwm=IWindowManager.Stub.asInterface(ServiceManager.getService(window);4. 5. if(keycode!=-1)6. longnow=SystemClock.uptimeMillis();7. 8. KeyEventdown=newKeyEvent(now,now,KeyEvent.ACTION_DOWN,keycode,0);9. KeyEventup=newKeyEvent(now,now,KeyEvent.ACTION_UP,keycode,0);10. 11. try12. wm.injectKeyEvent(down,false);13. catch(RemoteExceptione)14. Log.i(Input,DeadOjbectException);15. 16. 17. try18. wm.injectKeyEvent(up,false);19. catch(RemoteExceptione)20. Log.i(Input,DeadOjbectException);21. 22. 23. StatusBar通知栏屏蔽按钮当拉出expand的通知栏时，按钮的响应非常慢，这时最好将按钮给屏蔽掉，我们在 statusBarView.java中增加两个方法：1. publicvoidhiddenHotIcons()2. mHomeBtn.setVisibility(View.INVISIBLE);3. mBackBtn.setVisibility(View.INVISIBLE);4. mMenuBtn.setVisibility(View.INVISIBLE);5. 6. 7. publicvoidshowHotIcons()8. mHomeBtn.setVisibility(View.VISIBLE);9. mBackBtn.setVisibility(View.VISIBLE);10. mMenuBtn.setVisibility(View.VISIBLE);11. 拉出或收回通知栏中，就可以调用这个函数来显示或隐藏这几个按钮。修改文件： statusBarService.java目录：frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarService.java1. void performExpand() 2. if (SPEW) Slog.d(TAG, performExpand: mExpanded= + mExpanded);3. if (mDisabled & StatusBarManager.DISABLE_EXPAND) != 0) 4. return ;5. 6. if (mExpanded) 7. return;8. 9. mExpanded = true;10. makeExpandedVisible();11. mStatusBarView.hiddenHotIcons();12. updateExpandedViewPos(EXPANDED_FULL_OPEN);13. if (false) postStartTracing();14. 15. void performCollapse() 16. if (SPEW) Slog.d(TAG, performCollapse: mExpanded= + mExpanded17. + mExpandedVisible= + mExpandedVisible18. + mTicking= + mTicking);19. 20. if (!mExpandedVisible) 21. return;22. 23. mExpandedVisible = false;24. visibilityChanged(false);25. mExpandedParams.flags |= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;26. mExpandedParams.flags &= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;27. mExpandedDialog.ge