android - I'm using onSensorChanged(). What should I specify in <uses-feature>? -


i've checked doc here: http://developer.android.com/guide/topics/manifest/uses-feature-element.html

and found 2 relevant features:

1) android.hardware.sensor.accelerometer

2) android.hardware.sensor.compass

which 1 need specify in manifest? or both?

yes, i'm sure i'm using accelerometer. accelerometer , magnetic field values used calculate "direction" (which means i'm using android.hardware.sensor.compass ??)

here's code:

@override  public void onsensorchanged(sensorevent event) {   int type = event.sensor.gettype();    switch (type) {   case sensor.type_magnetic_field:    mags = event.values.clone();    break;                //i'm using accelerometer here   case sensor.type_accelerometer:    accels = event.values.clone();                         break; }                     sensormanager.getrotationmatrix(rotationmat, i, accels, mags);    sensormanager.getorientation(rotationmat, calculatedorients);                 //i direction here,  need specify android.hardware.sensor.compass in <uses-feature> ?    azimuth = (float) math.todegrees(calculatedorients[0]);    pitch = (float) math.todegrees(calculatedorients[1]);    roll = -(float) math.todegrees(calculatedorients[2]); }

thank in advance!

i think answer , should use both.

make sure can set required false , have application write notice user. else might not able distribute older clients through android market.

<uses-feature android:name="android.hardware.sensor.accelerometer" android:required="true" /> <uses-feature android:name="android.hardware.sensor.compass" android:required="true" />

Comments

Post a Comment

Popular posts from this blog

asp.net - repeatedly call AddImageUrl(url) to assemble pdf document -

i'm using abcpdf , i'm curious if can recursively call addimageurl() function assemble pdf document compile multiple urls? something like: int pagecount = 0; int theid = thedoc.addimageurl("http://stackoverflow.com/search?q=abcpdf+footer+page+x+out+of+", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetochain(theid); } pagecount = thedoc.pagecount; console.writeline("1 document page count:" + pagecount); //flatten document (int = 1; <= pagecount; i++) { thedoc.pagenumber = i; thedoc.flatten(); } //now try again theid = thedoc.addimageurl("http://stackoverflow.com/questions/1980890/pdf-report-generation", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetoc
Read more

java - Android recognize cell phone with keyboard or not? -

in android app, want detect user's device if device has keyboard(like motorola milestone) , show corresponding user interface. guys know how that? ! regards justicepenny http://developer.android.com/reference/android/content/res/configuration.html public int keyboard the kind of keyboard attached device. 1 of: keyboard_nokeys, keyboard_qwerty, keyboard_12key. that's it!
Read more

iphone - How would you achieve a LED Scrolling effect? -

how achieve led scrolling effect example below? led sign - led ticker emulator iphone , ipad http://img.skitch.com/20101201-rsfh4p1bajb1wp94k466pdpiuj.preview.jpg sometimes remunerates comment in other posts :) have put code you, should implement font '8pin matrix' realistic feeling. uilabel *label; - (void)viewdidload { [super viewdidload]; label = [[uilabel alloc]initwithframe:cgrectmake(10, 50, 300, 20)]; label.font = [uifont fontwithname:@"courier-bold" size:16.0]; label.backgroundcolor = [uicolor blackcolor]; label.textcolor = [uicolor greencolor]; label.linebreakmode = uilinebreakmodecharacterwrap; // otherwise "…" label.text = @"this led text scrolled "; // blanks space between [self.view addsubview:label]; [nstimer scheduledtimerwithtimeinterval:0.12f target:self selector:@selector(scrolllabel) use
Read more