android launcher 日历图标显示日期

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看到iphone上的日历图标上的数字会随着日期的变化而变化，最近在android平台上也研究了 一下，实现方法如下：

直接上源码

在launcher里改的

首先，在IconCache.java文件中，找到方法private CacheEntry cacheLocked(ComponentName componentName, ResolveInfo info,
            HashMap<Object, CharSequence> labelCache)
在entry.icon = Utilities.createIconBitmap(icon, mContext); 这个位置修改：

<span style="font-size:14px;">if(info.activityInfo.packageName.equals("com.android.calendar")){entry.icon = Utilities.createCalendarIconBitmap(icon, mContext);}else{if (index >= 0) {entry.icon = Utilities.createIconBitmap(icon, mContext);} else {entry.icon = Utilities.createIconBitmap(/* SPRD: Feature 253522, Remove the application drawer view @{ */// getFullResIcon(info), mContext);icon, mContext, true);}}</span>

改后源码如下：

<span style="font-size:14px;">private CacheEntry cacheLocked(ComponentName componentName, ResolveInfo info,HashMap<Object, CharSequence> labelCache) {CacheEntry entry = mCache.get(componentName);if (entry == null) {entry = new CacheEntry();mCache.put(componentName, entry);ComponentName key = LauncherModel.getComponentNameFromResolveInfo(info);if (labelCache != null && labelCache.containsKey(key)) {entry.title = labelCache.get(key).toString();} else {entry.title = info.loadLabel(mPackageManager).toString();if (labelCache != null) {labelCache.put(key, entry.title);}}if (entry.title == null) {entry.title = info.activityInfo.name;}/* SPRD: Fix bug 281291, remove icon_top for theme defaut icon @{ *//* SPRD: UUI theme : system icons @{ */Drawable icon;/* SPRD: Fix bug294355, add just to ThemeManager. @{ */int index = sysIndexOf(componentName.getClassName());Log.i("jxt", "index:"+index+",Name:"+componentName.getClassName());icon = getFullResIcon(info);//changed by  leo if(info.activityInfo.packageName.equals("com.android.calendar")){entry.icon = Utilities.createCalendarIconBitmap(icon, mContext);}else{if (index >= 0) {entry.icon = Utilities.createIconBitmap(icon, mContext);} else {entry.icon = Utilities.createIconBitmap(/* SPRD: Feature 253522, Remove the application drawer view @{ */// getFullResIcon(info), mContext);icon, mContext, true);}}/* @} *//* @} *//* @} */}return entry;}</span>

接下来修改Utilities.java

添加一个函数：

<span style="font-size:14px;">static Bitmap createCalendarIconBitmap(Drawable icon, Context context){Bitmap calendarIcon = createIconBitmap(icon,context);String dayString  = String.valueOf(Calendar.getInstance().get(Calendar.DAY_OF_MONTH));synchronized (sCanvas) {final Canvas canvas = sCanvas;canvas.setBitmap(calendarIcon);final float mDensity = context.getResources().getDisplayMetrics().density;Paint mDatePaint = new Paint();mDatePaint.setTypeface(Typeface.DEFAULT_BOLD);mDatePaint.setTextSize((int)30F * mDensity);mDatePaint.setColor(0xff000000);mDatePaint.setAntiAlias(true);Rect rect = new Rect();mDatePaint.getTextBounds(dayString,0,dayString.length(),rect);int hoffset = 20;int width1 = rect.right - rect.left;int height1 = rect.bottom - rect.top;int width2 = calendarIcon.getWidth();int height2 = calendarIcon.getHeight() + hoffset;canvas.drawText(dayString,(width2 - width1)/2 - rect.left,(height2 - height1)/2 - rect.top,mDatePaint);canvas.setBitmap(null);return calendarIcon;}}</span>

再修改LauncherModel.java文件：

在onReceive()方法中添加如下代码：

<span style="font-size:14px;">//changed by leo}else if(Intent.ACTION_DATE_CHANGED.equals(action) ||Intent.ACTION_TIME_CHANGED.equals(action) ||Intent.ACTION_TIMEZONE_CHANGED.equals(action)){final String packageName = "com.android.calendar";enqueuePackageUpdated(new PackageUpdatedTask(PackageUpdatedTask.OP_UPDATE, new String[]{packageName}));}</span>

最后修改LauncherApplication.java文件，如果是launcher3的源码，则修改LauncherAppState.java文件

我这里修改的是

LauncherAppState.java

在构造函数 private LauncherAppState()中添加：

<span style="font-size:14px;"> //changed by leofilter.addAction(Intent.ACTION_TIME_CHANGED);filter.addAction(Intent.ACTION_DATE_CHANGED);filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);</span>

修改后的样式为：

<span style="font-size:14px;"> // Register intent receiversIntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);filter.addAction(Intent.ACTION_PACKAGE_REMOVED);filter.addAction(Intent.ACTION_PACKAGE_CHANGED);filter.addDataScheme("package");sContext.registerReceiver(mModel, filter);filter = new IntentFilter();filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);filter.addAction(Intent.ACTION_LOCALE_CHANGED);filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);//changed by leofilter.addAction(Intent.ACTION_TIME_CHANGED);filter.addAction(Intent.ACTION_DATE_CHANGED);filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);sContext.registerReceiver(mModel, filter);
</span>

当然， 这样是不能运行看到效果的，要将该导入的包都导入 ，然后再单编译launcher模块，push到手机里，就能看到日历图标上显示当前日期了。

      今天看到好多人修改后引起了问题，我把源码提取出来了，放在资源里，需要的可以去下载查看，请点击链接

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