Taking photo in android -

-

hi developing app camera functionality surfaceview. want take picture when surface view created.

in fragment's oncreateview method, initialized need.

@override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         // inflate layout fragment         view = inflater.inflate(r.layout.game_one_start_fragment, container, false);          initwidgets(view);             return view;      }

in initwidgets() method initialized surfaceview object below

msurfaceview = (surfaceview) view.findviewbyid(r.id.game_action_surfaceview); msurfaceholder = msurfaceview.getholder();

in onresume() method getting surfaceholder object.

@override     public void onresume() {         super.onresume();         msurfaceholder.addcallback(this);         msurfaceholder.settype(surfaceholder.surface_type_push_buffers);         safecameraopen(camera.camerainfo.camera_facing_back);      }

safecameraopen() have followed android developer link. used same code mentioned.

the surfaceholder.callback used below

@override     public void surfacecreated(surfaceholder holder) {          mcamera.startpreview();      }       @override     public void surfacechanged(surfaceholder holder, int format, int width, int height) {          try { //to set picture orientation             setcameradisplayorientation(getactivity(), findfrontfacingcameraid(), mcamera);             mcamera.startpreview();             mcamera.setpreviewdisplay(holder);          } catch (ioexception e) {              e.printstacktrace();          }          camera.parameters parameters = mcamera.getparameters();         parameters.getsupportedpreviewsizes();          mcamera.setparameters(parameters);       }      @override     public void surfacedestroyed(surfaceholder holder) {         mcamera.stoppreview();         mcamera.release();     }

i want take picture when fragment loaded.

i have tried in onviewcreated(),onresume() , onstart() lifecycle methods. within them have used following line

 mcamera.takepicture(null,null,mpicturecallback);

(mcamera object created , initialized in safecameraopen() method)

if tried within mentioned lifecycle methods, getting following crash error.

java.lang.runtimeexception: takepicture failed             @ android.hardware.camera.native_takepicture(native method)             @ android.hardware.camera.takepicture(camera.java:1266)             @ android.hardware.camera.takepicture(camera.java:1211)             @ com.gaming.fragment.gameonestartfragment.snappicture(gameonestartfragment.java:76)             @ com.gaming.fragment.gameonestartfragment.surfacecreated(gameonestartfragment.java:284)             @ android.view.surfaceview.updatewindow(surfaceview.java:572)             @ android.view.surfaceview.access$000(surfaceview.java:86)             @ android.view.surfaceview$3.onpredraw(surfaceview.java:175)             @ android.view.viewtreeobserver.dispatchonpredraw(viewtreeobserver.java:847)             @ android.view.viewrootimpl.performtraversals(viewrootimpl.java:1897)             @ android.view.viewrootimpl.dotraversal(viewrootimpl.java:1019)             @ android.view.viewrootimpl$traversalrunnable.run(viewrootimpl.java:5725)             @ android.view.choreographer$callbackrecord.run(choreographer.java:761)             @ android.view.choreographer.docallbacks(choreographer.java:574)             @ android.view.choreographer.doframe(choreographer.java:544)             @ android.view.choreographer$framedisplayeventreceiver.run(choreographer.java:747)             @ android.os.handler.handlecallback(handler.java:733)             @ android.os.handler.dispatchmessage(handler.java:95)             @ android.os.looper.loop(looper.java:136)             @ android.app.activitythread.main(activitythread.java:5086)             @ java.lang.reflect.method.invokenative(native method)             @ java.lang.reflect.method.invoke(method.java:515)             @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:785)             @ com.android.internal.os.zygoteinit.main(zygoteinit.java:601)             @ dalvik.system.nativestart.main(native method)

but, when use takepicture() method of camera object inside button click capture picture.

how can take picture without view click ?

you don't call startpreview method of camera object. think should call startpreview before take picture. in case didn't set preview display:

try {    camera.setpreviewdisplay(surface.getholder()); } catch (ioexception e) {    // todo auto-generated catch block    e.printstacktrace(); }

check answer: how take pictures camera without preview when app starts?


Comments

Post a Comment

Popular posts from this blog

python - pip install -U PySide error -

-
does know how avoid following error when running pip install -u pyside per official website instructions here: https://pypi.python.org/pypi/pyside/#installing-pyside-on-a-mac-os-x-system note have done brew install qt successfully. you using pip version 7.0.3, version 7.1.2 available. should consider upgrading via 'pip install --upgrade pip' command. collecting pyside using cached pyside-1.2.4.tar.gz installing collected packages: pyside running setup.py install pyside complete output command /applications/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-build-cpxemt/pyside/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-0r7hri-record/install-record.txt --single-version-externally-managed --compile: ...
Read more

arrays - C++ error: a brace-enclosed initializer is not allowed here before ‘{’ token -

-
simple question: i'm trying initialize array within c++ class declaration: using namespace std; #include <string> class myclass{ public: string myarray[] = {"a","b","c"}; }; and i'm getting error: error: brace-enclosed initializer not allowed here before ‘{’ token no, without complied c++11 compiler, cannot initialize member array in declaration. have initialize array member in constructor. , don't use open array if know number of elements initialize array.
Read more

cytoscape.js - How to add nodes to Dagre layout with Cytoscape -

-
i trying add nodes dagre graph through cityscape.js. problem nodes not painted. code have: cy.add({ group: "nodes", data: { id:"n0",name:"n0",weight: 75 }, }); $.ajax(url).done(function(jsontree){ var newnodes=[]; for(var i=1;i<6;i++){ //var child = jsontree.result[i]; newnodes.push( { group: "nodes", data: { id: "n"+i, name:"n"+i}}, { group: "edges", data: { id: "e"+i, source: "n0", target: "n"+i } } ); } cy.add(newnodes); any ideas? have used loaded function reload graph not work. not know if have use specific function reload graph. thank in advance. you need add positions new nodes. cytoscape.js docs : it important note positions of newly added nodes must defined when calling cy.add(). nodes can not placed in graph without valid position — otherwise not displayed. yo...
Read more