[讲解]Android 2.3状态栏中添加menu,home和back快捷键的方

[讲解]Android 2.3状态栏中添加menu,home和back快捷键的方 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.png stat_home_pressed.png stat_back.png stat_back_pressed.png stat_menu.png stat_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.xml 1. 2. 8. 12. 16. 18. xml_stat_back.xml 1. 2. 8. 12. 16. 18. xml_stat_menu.xml 1. 2. 8. 12. 16. 18. 修改status_bar.xml成如下 目录: frameworks/base/packages/SystemUI/res/layout/status_bar.xml 1. 2. 20. 21. 22. 29. 30. 34. 42. 43. 50. 60. 71. 82. 90. 91. 92. 98. 103. 107. 111. 112. 118. 124. 130. 131. 132. 133. 143. 二 为按钮添加动态效果 修改 frameworks/base/packages/SystemUI/src/com/android/systemui/st atusbar/StatusBarView.java 在类中新增加四个成员(须导入android.widget.ImageButton和 android.content.Context): 1. ImageButton mHomeBtn; 2. ImageButton mBackBtn; 3. ImageButton mMenuBtn; 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mContext 1. 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. private void sendKeyIntent(int keycode){ 6. Intent intent = new Intent(Intent.ACTION_ICONKEY_CHANGED); 7. intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 8. intent.putExtra("keycode", keycode); 9. sendIntent(intent); 10. } 11. 12. private OnTouchListener homeOnTouch = new OnTouchListener(){ 13. //@Override 14. public boolean onTouch(View v, MotionEvent event) 15. { 16. // TODO Auto-generated method stub 17. switch (event.getAction()) { 18. case MotionEvent.ACTION_UP: 19. { 20. sendKeyIntent(RESV_KEY_HOME); 21. } 22. break; 23. } 24. return false; 25. } 26. }; 27. 28. private OnTouchListener backOnTouch = new OnTouchListener(){ 29. //@Override 30. public boolean onTouch(View v, MotionEvent event) 31. { 32. // TODO Auto-generated method stub 33. switch (event.getAction()) { 34. case MotionEvent.ACTION_UP: 35. { 36. sendKeyIntent(RESV_KEY_BACK); 37. } 38. break; 39. } 40. return false; 41. } 42. }; 43. 44. private OnTouchListener menuOnTouch = new OnTouchListener(){ 45. //@Override 46. public boolean onTouch(View v, MotionEvent event) 47. { 48. // TODO Auto-generated method stub 49. switch (event.getAction()) { 50. case MotionEvent.ACTION_UP: 51. { 52. sendKeyIntent(RESV_KEY_MENU); 53. } 54. break; 55. } 56. return false; 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. public boolean onInterceptTouchEvent(MotionEvent event) { 2. if( (event.getX() > mHomeBtn.getRight()) 3. && (event.getX() < mMenuBtn.getLeft())){ 4. return mService.interceptTouchEvent(event) 5. ? true : super.onInterceptTouchEvent(event); 6. } 7. return false; 8. //return mService.interceptTouchEvent(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. * @hide 3. */ 4. public static final String ACTION_ICONKEY_CHANGED ="android.intent.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. else if (action.equals(Intent.ACTION_ICONKEY_CHANGED)) { 2. Log.d(TAG, "Received ACTION_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. private final void updateIconKeyAction(Intent intent){ 2. int keycode = intent.getIntExtra("keycode", -1); 3. IWindowManager wm = IWindowManager.Stub.asInterface(ServiceManager.getService("window")); 4. 5. if(keycode != -1){ 6. long now = SystemClock.uptimeMillis(); 7. 8. KeyEvent down = new KeyEvent(now, now, KeyEvent.ACTION_DOWN, keycode, 0); 9. KeyEvent up = new KeyEvent(now, now, KeyEvent.ACTION_UP, keycode, 0); 10. 11. try { 12. wm.injectKeyEvent(down, false); 13. }catch (RemoteException e) { 14. Log.i("Input", "DeadOjbectException"); 15. } 16. 17. try{ 18. wm.injectKeyEvent(up, false); 19. }catch(RemoteException e) { 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. public void hiddenHotIcons(){ 2. mHomeBtn.setVisibility(View.INVISIBLE); 3. mBackBtn.setVisibility(View.INVISIBLE); 4. mMenuBtn.setVisibility(View.INVISIBLE); 5. } 6. 7. public void showHotIcons(){ 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/st atusbar/StatusBarService.java 1. 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=" + mExpanded 17. + " mExpandedVisible=" + mExpandedVisible 18. + " 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.getWindow().setAttributes(mExpandedParams); 28. mTrackingView.setVisibility(View.GONE); 29. mExpandedView.setVisibility(View.GONE); 30. 31. mStatusBarView.showHotIcons(); 32. 33. if ((mDisabled & StatusBarManager.DISABLE_NOTIFICATION_ICONS) == 0) { 34. setNotificationIconVisibility(true, com.android.internal.R.anim.fade_in); 35. } 36. if (mDateView.getVisibility() == View.VISIBLE) { 37. setDateViewVisibility(false, com.android.internal.R.anim.fade_out); 38. } 39. 40. if (!mExpanded) { 41. return; 42. } 43. mExpanded = false; 44. } 编译 #source /opt/android_froyo_smdk/build/envsetup.sh #export TARGET_PRODUCT=full_smdkv210 #mmm frameworks/base/ 把编译生成的相关文件放进SD卡对应的目录即可, 在伟研科技 WY-S5PV210开发板上的效果如下图