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Android系统级推送原理详解：为什么App被杀也能收到通知？ - App应用开发 -...
...统。
一、核心架构：一条"公用"的长连接
Android 系统级推送的精髓：不是每个 App 自己建连接，而是操作系统维护一条到推送云端的长连接，所有 App 共享它。
消息流转过程：
你的服务器 -> 推送云（FCM/极光...
How to connect to my http://localhost web server from Android Emulator
What can I do in the Android emulator to connect it to my localhost web server page at http://localhost or http://127.0.0.1 ?
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How to implement a confirmation (yes/no) DialogPreference?
....setTitle("Title")
.setMessage("Do you really want to whatever?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(MainActivity.this...
Android 'Unable to add window — token null is not for an application' exception
I get the following Android exception when I try to open a dialog. Can someone please help me understand what is going on and how can I fix this problem?
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How to iterate through SparseArray?
Is there a way to iterate over Java SparseArray (for Android) ? I used sparsearray to easily get values by index. I could not find one.
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Android encryption / decryption using AES [closed]
... example of how to encrypt and decrypt image and other files with AES on Android?
11 Answers
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Further understanding setRetainInstance(true)
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Ok, perhaps I was slightly too harsh on the Android documentation, because it does have some useful information, but sadly none of it is linked from setRetainInstance(). From the page about fragments
Note: Each fragment requires a unique identifier that the system ...
Parsing query strings on Android
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Since Android M things have got more complicated. The answer of android.net.URI.getQueryParameter() has a bug which breaks spaces before JellyBean.
Apache URLEncodedUtils.parse() worked, but was deprecated in L, and removed in M.
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How to Sign an Already Compiled Apk
... with: jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore ~/.android/debug.keystore app.apk androiddebugkey -storepass android
– Pellet
Sep 19 '16 at 1:31
3
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How do I specify different layouts for portrait and landscape orientations?
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in my case , layout-land is not working when i am using , android:configChanges="orientation|keyboardHidden|screenSize"
– Tushar Pandey
Feb 11 '14 at 6:53
9
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