Android Communication between service and activity from other projects -


i've developed foreground service should handle bluetooth low energy communication between specific hw device.

this service has got activity in can set parameters manage service, anyway works activiy killed too.

the service contains bootreceiver , started device boot.

now, aim create another projects 1 or more activityes, 1 have communicate service , excange data.

i've looked aswer on net , results:

  • bind , interface

it seems 1 correct 1 lot complicated , involves lot of code little data.

  • broadcast receiver

broadcast receiver easy implement, if should read data bluetooth each 100ms example? don't think correct way.

which correct way of implementing communication that?

in android have several ways share data between application, it's depend on - how many data want share between applications, cyber issues, battery consumption , timing issues:

1) can use aidl in both app in order share data, please aware not able send objects, should convert data parcelable or byte-array. pros - great solutions short data.

2)sharedpreferences , use same android:shareduserid="android.uid.share" on both application - not recommended due battery consumption , timing issue, great share big data.

3)you can use client/server model , open unix socket on bot applications - pros - reliable , can secured, cons - short battery life.

4)broadcast receiver - [not recommended] due potentially timing issue.

5)using shared file @ sdcard - not recommended.


Comments

Post a Comment

Popular posts from this blog

angular - Ionic slides - dynamically add slides before and after -

hi i'm using ngfor create set of 3 slides while starting in middle i'm guaranteed able slide left or right on start. when slide right can simple listen reachedend , push slide array i'm looping. but have problem adding slide beginning. if same above , use e.g. array.unshift() or spread add item beginning, view think it's on position 0 , snaps view new slide. the code below work animates slide change index 1. slide = [0,1,2] //example loop slidechanged(event) { if(this.slides.isbeginning()){ this.slide = [this.slide[0]-1, ...this.slide]; this.slides.update(); this.slides.slideto(1) } } <ion-slides [initialslide]="1" (ionslidedidchange)="slidechanged($event)"> <ion-slide *ngfor="let item of slide"> <h1>slide {{item}}</h1> </ion-slide> </ion-slides> any appreciated! you can using ionslidenextend , ionslideprevend events slides . please
Read more

minify - Minimizing css files -

i want know how css files can minimized. currently, using external sites css minifier compress css files. however, after removing whitespaces, comments, etc, file sizes reduced 10-15%. how frameworks bootstrap manage make minimized versions kilobytes. as example, css is: body { background-color: #ff0; } the reduction goes 28 bytes 22 bytes other css files have lot more characters still smaller this. actually minifying code means it's remove thing code white space characters new line characters comments block delimiters it reduces amount of code has transferred on web , speed site load fastly.but unreadable format.
Read more

Add a dynamic header in angular 2 http provider -

i have http interceptor built via tutorial https://scotch.io/@kashyapmukkamala/using-http-interceptor-with-angular2 the problem need have dynamic header changes automatically once changes 'mode' in app. service able tell interceptor change header, or have interceptor pull header (which string)from service each request. able throwing away patch method, call http.patch('new header string') set header string. call in service controls 'mode' setting. wondering if there way interceptor pull recent value service each request or if can add method http provider via interceptor? i've tried call service in interceptor each request returns undefined. because creating new instance of service or copying value before service fired , loaded/changed data. i don't want pass header string every http provider call because defeats purpose of having interceptor, id able set once changes or have provider fetch service before makes request. tl;dr : need add autom
Read more