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使用App Inventor扩展实现多点触控：Scale Detector · App Inventor 2 中文网
...模板来创建新的 App Inventor 组件，这些组件可以实现其他 Android 手势检测器。
1、多点触控演示应用
ScaleGestureDemo 是缩放手势的简单演示，其中两根手指靠得更近或更远以表示展开或收缩。 你可以从这里下载打包的应用程序并...
How to pass values between Fragments
... Regarding using interfaces to communicate between fragments: developer.android.com/training/basics/fragments/…
– Andre L Torres
Feb 21 '18 at 0:04
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Set inputType for an EditText Programmatically?
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According to the TextView docs, the programmatic version of android:password is setTransformationMethod(), not setInputType(). So something like:
mEdit.setTransformationMethod(PasswordTransformationMethod.getInstance());
should do the trick.
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SQLiteDatabase.query method
...789 there are several versions that have a limit parameter, e.g. developer.android.com/reference/android/database/sqlite/… it's all just simple text concatenation in the end so you can put e.g. "some_column LIMIT 10" into orderBy and it would still work
– zapl
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How to determine when Fragment becomes visible in ViewPager
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Thanks to today's Android Support Library update (rev 11), the user visible hint issue is finally fixed. It's now safe to use user visible hint for ViewPager.
– Oasis Feng
Nov 14 '12 at 3:05
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Understanding Canvas and Surface concepts
...d therefore the whole Surface / Canvas / Bitmap system, which is used in Android.
3 Answers
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What is the meaning of “POSIX”?
... a related project that seems to add more functionality on top of Cygwin.
Android
Android has its own C library (Bionic) which does not fully support POSIX as of Android O: Is Android POSIX-compatible?
Bonus level
The Linux Standard Base further extends POSIX.
Use the non-frames indexes, they a...
Java Timestamp - How can I create a Timestamp with the date 23/09/2007?
...time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
Later versions of Android bundle implementations of the java.time classes.
For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….
The Thre...
Getting a File's MD5 Checksum in Java
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Doesn't work for me in my android code I get this error...java.lang.NoSuchMethodError: org.apache.commons.codec.binary.Hex.encodeHexString at org.apache.commons.codec.digest.DigestUtils.md5Hex(DigestUtils.java:215)
– JPM
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START_STICKY and START_NOT_STICKY
...tween START_STICKY and START_NOT_STICKY while implementing services in android? Could anyone point out to some standard examples.. ?
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