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传感器组件 · App Inventor 2 中文网
...添加此属性的版本之前，加速度传感器 组件直接传递从 Android 系统接收到的传感器值。然而，这些值无法补偿默认为横向模式的平板电脑，需要 MIT App Inventor 程序员进行补偿。但是，在手机等纵向模式设备中进行补偿会导致结...
App Inventor 2 能否实现后台推送通知？源码级深度调研 - App应用开发 - 清...
...; App（即使未打开）
关键特征：
1. 操作系统级别：由 Android/iOS 系统进程接收，不需要 App 运行
2. 持久连接：手机系统与推送服务器保持长连接（不是 App 自己的连接）
3. 省电：所有 App 共享同一条系统级连接
4. 可靠性高：...
ASP.NET Web API Authentication
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Is it going to maintain a session for Android application?
– Mujtaba Hassan
Jun 13 '12 at 12:42
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Parcelable where/when is describeContents() used?
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@LeoLink android.os.ParcelFileDescriptor
– Ognyan
Oct 21 '14 at 10:34
7
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How to compare dates in Java? [duplicate]
...ava.time (JSR-310).
Back-ports are available for Java 6 and 7 as well as Android.
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Calling a Fragment method from a parent Activity
I see in the Android Fragments Dev Guide that an "activity can call methods in a fragment by acquiring a reference to the Fragment from FragmentManager, using findFragmentById() or findFragmentByTag() ."
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Usage of forceLayout(), requestLayout() and invalidate()
...g called directly after invalidate is called, I even see that happening in Android source code for things like TextView, but according to this diagram doing so is redundant, right? So is there any purpose for doing that?
– tcox
May 12 '15 at 22:10
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Prevent ViewPager from destroying off-screen views
...s limit will be recreated from the adapter when needed."
http://developer.android.com/reference/android/support/v4/view/ViewPager.html#setOffscreenPageLimit(int)
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...载：
cn.fun123.SQLite.aix
SQLite
SQLite 是 Android 内置的小型、快速、独立的 SQL（结构化查询语言）数据库引擎。
SQL 语句用于创建、选择、更新和删除一个或多个表中的数据。SQL 允许表之间建立复杂的关系，并提...
How to read/write a boolean when implementing the Parcelable interface?
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@sotrh that is a copy-paste from a source code. Open android.os.Parcel source and see for yourself.
– Yaroslav Mytkalyk
Jan 5 '16 at 10:19
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