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Dialog throwing "Unable to add window — token null is not for an application” with getApplication()
...you leave the activity before the callback is called? At least that's what Android seems to complain about in logcat.
– Artem Russakovskii
Oct 14 '11 at 21:20
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Check if application is installed - Android
...69
Note: This will not work in some virtual spaces. They can violate the Android API and always return an array, even if there is no application with that package name.
In this case, use getPackageInfo.
share
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Difference between onCreate() and onStart()? [duplicate]
... Log.i(TAG, "On Create .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onDestroy()
*/
@Override
protected void onDestroy() {
super.onDestroy();
Log.i(TAG, "On Destroy .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onPause()
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XML Android Permissions List Full [closed]
...uld, however, access this list of permissions through using Eclipse, under AndroidManifest.xml by adding a "Uses Permission" control. On the right, it shows you the entire list of available permissions so you don't do a typo somewhere.
But hey, sharing is caring! :D
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What is android:ems attribute in Edit Text? [duplicate]
In EditText there is an attribute named android:ems . The description
is "Makes the EditText be exactly this many ems wide"
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BLE（五）移动端工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
文章源自：https://www.gandalf.site/2018/12/ble.html
0x1 Android手机抓取app蓝牙数据0x11 Android蓝牙HCI日志在部分Android机型为开发人员提供了保存蓝牙日志的选项，即可保存手机向设备发送的数据和设备响应的数据，打开方式如下：
开发...
HAXM 安装/启动失败？ - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
报错如下：
emulator: Android emulator version 30.3.5.0 (build_id 7033400) (CL:N/A)
127.0.0.1 - - [01/Apr/2025 16:55:37] "GET /echeck/ HTTP/1.1" 200 39
handleCpuAcceleration: feature check for hvf
emulator: ERROR: x86_64 emulation currently requires hardware acceleration!
CPU accel...
【iOS】有关苹果iOS App的一些进展、BluetoothLE蓝牙拓展等 - App Inventor...
1、iOS由于苹果限制，不能像Android那样使用拓展，只能内置组件适配比如ble功能，经典蓝牙不支持。
我们正在努力将 BluetoothLE 扩展程序移植到 iOS 平台，使其成为一个组件。由于 Apple 对应用程序的限制，我们无法像在 Android 上...
AccessibilityTools 无障碍工具扩展：执行返回、主页和最近任务等操作 · A...
...面板
API 17
SplitScreen激活分屏
API 26，Android Oreo 8.1.0 起可用
其他方法
API 16
后续回复中有用户反馈：如果应用面向 Android 12 或更高版本，可能因为服务带有 intent filter 但未设置 android:exp...
How to display HTML in TextView?
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That should be android.text.Html.fromHtml. I know most IDEs will fix it for you but for readability it is nicer to know the package names.
– Martin
Oct 22 '13 at 12:22
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