Some of the most common uses for repeating alarms and background services is to schedule regular updates of application data from Internet resources, cache data, or execute long running downloads. But if you aren't connected to the Internet, or
Users have a number of alternatives when it comes to enjoying the audio from their Android devices. Most devices have a built-in speaker, headphone jacks for wired headsets, and many also feature Bluetooth connectivity and support for A2DP
There are many ways to store your data, such as in an online database, in a local SQLite database, or even in a text file. It is up to you to decide what is the best solution for your application. This lesson shows you how to create a SQLite virtual
When developing your Android application to take advantage of multiple APKs on Google Play, it’s important to adopt some good practices from the get-go, and prevent unnecessary headaches further into the development process. This lesson shows
在4.0的圓環滑動解鎖中,我們點擊下去的時候會有震動效果,因為這個空間設定的震動效果沒有綁定設定中設定的觸摸震動開關來取消震動效果,所以如果我們需要根據設定中的觸摸震動開關來開啟和取消滑動解鎖的震動效果,就需要做以下修改了。 在LockScreen.java類中的LockScreen方法中的else if (mUnlockWidget instanceof
前兩天再做一個關於AChartEngine曲線的即時顯示,學習了一些AChartEngine基本用法,現在將XYMultipleSeriesRenderer樣式屬性說明記錄下來和大家一起分享一下[java]XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
在android開發中,如果我們需要讀取表中的某一欄位的資料的話,往往使用一個資料庫的遊標cursor來自上而下的遍曆讀取,讀的時候,為了確保表不為空白,我們可以調用cursor的getCount方法來,如果值不為0,代表表不為空白,這時候,開發人員們往往再判斷完表是否為空白之後,直接按照欄位讀資料,運行時會報類似於這樣的錯誤:Index -1 requested,with a size of