Launcher中拨号、短信图标加数字提示未接电话、未读短信数量

之前尝试过使用BadgeView来实现，修改涉及地方太多了，后来换了这种方式

本文仅简单实现拨号、短信图标动态提示未读数目，若有更好方式实现的，欢迎交流

Launcher.java

    private final Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            ......

            //ADD BY XIONG.CHEN FOR SHOW UNREAD MMS
            else if (msg.what == UPDATE_MMS_ICON) {
            	setMmsOrPhoneNum(MMS_ICON_NAME, getMissMmsCount());
            } else if (msg.what == UPDATE_CALL_ICON) {
            	setMmsOrPhoneNum(PHONE_ICON_NAME, getMissCallCount());
            }
        }
    };

        //ADD BY XIONG.CHEN FOR SHOW UNREAD MMS ADD MISSCALL
	private SMSContentObserver smsContentObserver = null;
	private CallContentObserver callContentObserver = null;

	private final static int UPDATE_MMS_ICON = 826;
	private final static int UPDATE_CALL_ICON = 1206;
	private final static String PHONE_ICON_NAME = "com.android.contacts.activities.DialtactsActivity";
	private final static String MMS_ICON_NAME = "com.android.mms.ui.ConversationList";
	
	
	public class SMSContentObserver extends ContentObserver {
		private Handler mSmsHandler;

		public SMSContentObserver(Context context, Handler handler) {
			super(handler);
			mSmsHandler = handler;
		}

		@Override
		public void onChange(boolean selfChange) {
			mHandler.removeMessages(UPDATE_MMS_ICON);
			Message msg = mHandler.obtainMessage(UPDATE_MMS_ICON);
			msg.obj = getMissCallCount();
			mHandler.sendMessage(msg);
		}
	}
	
	public class CallContentObserver extends ContentObserver {
		private Handler mHandler;

		public CallContentObserver(Context context, Handler handler) {
			super(handler);
			mHandler = handler;
		}

		@Override
		public void onChange(boolean selfChange) {
			mHandler.removeMessages(UPDATE_CALL_ICON);
			Message msg = mHandler.obtainMessage(UPDATE_CALL_ICON);
			msg.obj = getMissCallCount();
			mHandler.sendMessage(msg);
		}
	}
	
	/**
	 * 
	 * @param flag updata which icon,phone or mms
	 * @param missCount
	 */
	private void setMmsOrPhoneNum(final String flag, final int missCount) {
		if(mWorkspace == null) return;
		ArrayList cellLayouts = mWorkspace.getWorkspaceAndHotseatCellLayouts();
        for (final CellLayout layoutParent: cellLayouts) {
            final ViewGroup shortcutAndWidgetContainer = layoutParent.getShortcutsAndWidgets();

            mWorkspace.post(new Runnable() {
                public void run() {

                    int childCount = shortcutAndWidgetContainer.getChildCount();
                    for (int j = 0; j < childCount; j++) {
                        View view = shortcutAndWidgetContainer.getChildAt(j);
                        
                        Object tag = view.getTag();
                        if (tag instanceof ShortcutInfo) {
                            final ShortcutInfo info = (ShortcutInfo) tag;
                            final Intent intent = info.intent;

                            if (intent != null) {
                                final ComponentName name = intent.getComponent();
                                if (name != null && name.getClassName().equals(flag)) {
                                	BubbleTextView bv = (BubbleTextView) view;
                                	Bitmap defaultIconBitmap = Bitmap.createBitmap(info.getIcon(mIconCache));
                                    Bitmap bitmap = Utilities.createIconBitmap(defaultIconBitmap, missCount);
                                    bv.setCompoundDrawablesWithIntrinsicBounds(null,
                                    		new FastBitmapDrawable(bitmap),
                                            null, null);
                                }
                            }
                        }
                    }
                }
            });
        }
	}
	
	private int getMissMmsCount() {
		int missSmsCount = 0;
		Cursor cursorSMS = null;
		Cursor cursorMMS = null;
		try {
			cursorSMS = getContentResolver().query(
					Uri.parse("content://sms"), null, "(read=0 and type=1)",
					null, null);
			cursorMMS = getContentResolver().query(
					Uri.parse("content://mms"), null, "(read=0)", null,
					null);
		} catch (SQLiteException e) {
			return missSmsCount;
		}
		if (cursorSMS != null) {
			missSmsCount = cursorSMS.getCount();
			cursorSMS.close();
		}
		if (cursorMMS != null) {
			missSmsCount = missSmsCount + cursorMMS.getCount();
			cursorMMS.close();
		}

		return missSmsCount;
	}
	
	private int getMissCallCount() {
		int missCallCount = 0;
		Uri missingCallUri = Calls.CONTENT_URI;
		String where = Calls.TYPE + " = '" + Calls.MISSED_TYPE + "'"
				+ " AND new=1";
		Cursor cursorCall = null;
		try {
			cursorCall = getContentResolver().query(missingCallUri,
					null, where, null, null);
		} catch (SQLiteException e) {
			return missCallCount;
		}

		if (cursorCall != null) {
			missCallCount = cursorCall.getCount();
			cursorCall.close();
		}

		return missCallCount;
	}
	//ADD END

    //add by xiong.chen for ...
    static Bitmap createIconBitmap(Bitmap b, int count) {
    	
    	if (count == 0) return b;
        int textureWidth = b.getWidth();
        final Canvas canvas = sCanvas;
        Paint paint = new Paint();
        canvas.setBitmap(b);
        
        paint.setColor(Color.RED);
        canvas.drawCircle(textureWidth - 17, 16, 16, paint);
        paint.setColor(Color.WHITE);
        paint.setStyle(Style.STROKE);
        paint.setStrokeWidth(2);
        canvas.drawCircle(textureWidth - 17, 16, 16, paint);
        
        Paint countPaint = new Paint(Paint.ANTI_ALIAS_FLAG|Paint.DEV_KERN_TEXT_FLAG);  
        countPaint.setColor(Color.WHITE);  
        countPaint.setTextSize(26f);  
        countPaint.setTypeface(Typeface.DEFAULT_BOLD);  
        float x = textureWidth - 24;
        if (count > 9) x -= 4;        
        canvas.drawText(String.valueOf(count), x, 25, countPaint); 
        //END
    	return b;
    }

在finishBindingItems()方法中加入

        //ADD BY XIONG.CHEN ...
        int missCall = getMissCallCount();
        int missMms = getMissMmsCount();
        if(missCall != 0) {
        	setMmsOrPhoneNum(PHONE_ICON_NAME, missCall);
        }
        if(missMms != 0) {
        	setMmsOrPhoneNum(MMS_ICON_NAME, missMms);
        }

使得第一回启动launcher时便可提示未读信息