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App Inventor 2 PhoneInfo 拓展：获取手机等设备软硬件、版本等相关信息 ·...
...下载：
PhoneInfo.aia
使用方法
GetDeviceID
获取设备ID。Android 10+不支持！
GetPhoneNumber
获取本机手机号码。无SIM卡设备将返回空文本；双SIM卡设备将返回主卡号码。Android 10+不支持！
注：这个方法采用的是较常规的方式获取信...
TaifunFlashlight 手电筒/闪光灯拓展 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
一个用于打开/关闭手电筒的扩展插件，所需要的权限：
android.permission.CAMERA（注：拍摄照片和视频）
android.permission.FLASHLIGHT（注：控制手电筒）
要至少11级的API（即Android 3.0.0以上）
属性
返回设备是否有闪光灯
过程
...
蓝牙接收的数据怎么一行一行更新显示和，类似图2这样的 - App应用开发 - 清...
...还在写 为什么现在app出现运行故障 弹出来：Need android.permission.BLUETOOTH_SCAN permission for android.content.AttributionSource@d5ca151a: GattService registerScanner
注意： 5秒钟后将报告另一条错误信息。liangzhi123 发表于 2024-12-06 16:04
这个还...
MIT已发布v2.76版本：支持iOS编译，苹果版App终于来了，中文网已完成升级！...
...待升级的重要更新：
1、iOS苹果版App编译支持 beta版
2、Android SDK由 34 升级到 35，支持安卓15
3、日志的控制台展示
4、全新的颜色选择器
5、AAR包支持
------------------ 2025/08/24----------------------
中文网已完成v2.76版本升级。...
Handler vs AsyncTask
... provide a convenient, easy-to-use way to achieve background processing in Android apps, without worrying too much about the low-level details(threads, message loops etc). It provides callback methods that help to schedule tasks and also to easily update the UI whenever required.
However, it is im...
How to convert Milliseconds to “X mins, x seconds” in Java?
...Minutes(millis))
);
If TimeUnit or toMinutes are unsupported (such as on Android before API version 9), use the following equations:
int seconds = (int) (milliseconds / 1000) % 60 ;
int minutes = (int) ((milliseconds / (1000*60)) % 60);
int hours = (int) ((milliseconds / (1000*60*60)) % 24);
//...
Retrieve a Fragment from a ViewPager
...
private static String makeFragmentName(int viewId, long id) {
return "android:switcher:" + viewId + ":" + id;
}
A HAPPY PATH: ViewPager.instantiateItem()
A similar approach to getItem() above but non-lifecycle-breaking is to this is to hook into instantiateItem() instead of getItem() as the ...
How to send objects through bundle
...he global application state.
Update:
Customize and then add this to your AndroidManifest.xml :
<application android:label="@string/app_name" android:debuggable="true" android:name=".CustomApplication"
And then have a class in your project like this :
package com.example;
import android.app...
Converting of Uri to String
...another activity, try the method intent.setData(Uri uri)
https://developer.android.com/reference/android/content/Intent.html#setData(android.net.Uri)
In another activity, via intent.getData() to obtain the Uri.
share
...
How to subtract X days from a date using Java calendar?
...oject back-ports the classes to Java 6 & 7; the ThreeTenABP project to Android.
The Question is vague, not clear if it asks for a date-only or a date-time.
LocalDate
For a date-only, without time-of-day, use the LocalDate class. Note that a time zone in crucial in determining a date such as "...