java - Save image taken to a specific directory with specific name -
i having trouble saving image taken specific directory specific name. have no idea how it. below code.
cameracaptureimage.java
public class capturecameraimage extends activity { public static int cameraid = 0; public static boolean isblack = true; public static imageview image; @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activitycapturecameraimage); image = (imageview) findviewbyid(r.id.imgview); } public void onbackclick(view v){ cameraid = 0; intent = new intent(capturecameraimage.this,cameraview.class); startactivityforresult(i, 999); } } cameraview.java
public class cameraview extends activity implements surfaceholder.callback, onclicklistener{ private static final string tag = "cameratest"; camera mcamera; boolean mpreviewrunning = false; @suppresswarnings("deprecation") public void oncreate(bundle icicle){ super.oncreate(icicle); log.e(tag, "oncreate"); getwindow().setformat(pixelformat.translucent); requestwindowfeature(window.feature_no_title); getwindow().setflags(windowmanager.layoutparams.flag_fullscreen,windowmanager.layoutparams.flag_fullscreen); setcontentview(r.layout.cameraview); imageview img = (imageview) findviewbyid(r.id.blankimage); if(capturecameraimage.isblack) img.setbackgroundresource(android.r.color.black); else img.setbackgroundresource(android.r.color.white); msurfaceview = (surfaceview) findviewbyid(r.id.surface_camera); msurfaceview.setonclicklistener(this); msurfaceholder = msurfaceview.getholder(); msurfaceholder.addcallback(this); msurfaceholder.settype(surfaceholder.surface_type_push_buffers); } @override protected void onrestoreinstancestate(bundle savedinstancestate){ super.onrestoreinstancestate(savedinstancestate); } camera.picturecallback mpicturecallback = new camera.picturecallback() { public void onpicturetaken(byte[] data, camera camera) { // todo auto-generated method stub if (data != null){ //intent mintent = new intent(); //mintent.putextra("image",imagedata); mcamera.stoppreview(); mpreviewrunning = false; mcamera.release(); try{ bitmapfactory.options opts = new bitmapfactory.options(); bitmap bitmap= bitmapfactory.decodebytearray(data, 0, data.length,opts); bitmap = bitmap.createscaledbitmap(bitmap, 300, 300, false); int width = bitmap.getwidth(); int height = bitmap.getheight(); int newwidth = 300; int newheight = 300; // calculate scale - in case = 0.4f float scalewidth = ((float) newwidth) / width; float scaleheight = ((float) newheight) / height; // createa matrix manipulation matrix matrix = new matrix(); // resize bit map matrix.postscale(scalewidth, scaleheight); // rotate bitmap matrix.postrotate(90); bitmap resizedbitmap = bitmap.createbitmap(bitmap, 0, 0, width, height, matrix, true); capturecameraimage.image.setimagebitmap(resizedbitmap); }catch(exception e){ e.printstacktrace(); } //storebyteimage(mcontext, imagedata, 50,"imagename"); //setresult(foto_mode, mintent); setresult(585); finish(); } } }; protected void onresume(){ log.e(tag, "onresume"); super.onresume(); } protected void onsaveinstancestate(bundle outstate){ super.onsaveinstancestate(outstate); } protected void onstop(){ log.e(tag, "onstop"); super.onstop(); } @targetapi(9) public void surfacecreated(surfaceholder holder){ log.e(tag, "surfacecreated"); mcamera = camera.open(capturecameraimage.cameraid); } public void surfacechanged(surfaceholder holder, int format, int w, int h) { log.e(tag, "surfacechanged"); // xxx stoppreview() crash if preview not running if (mpreviewrunning){ mcamera.stoppreview(); } camera.parameters p = mcamera.getparameters(); p.setpreviewsize(300, 300); if(capturecameraimage.cameraid == 0){ string stringflashmode = p.getflashmode(); if (stringflashmode.equals("torch")) p.setflashmode("on"); // light set off, flash set normal 'on' mode else p.setflashmode("torch"); } mcamera.setparameters(p); try{ mcamera.setpreviewdisplay(holder); }catch (exception e){ // todo auto-generated catch block e.printstacktrace(); } mcamera.startpreview(); mpreviewrunning = true; mcamera.takepicture(null, mpicturecallback, mpicturecallback); } public void surfacedestroyed(surfaceholder holder) { log.e(tag, "surfacedestroyed"); //mcamera.stoppreview(); //mpreviewrunning = false; //mcamera.release(); } private surfaceview msurfaceview; private surfaceholder msurfaceholder; public void onclick(view v) { // todo auto-generated method stub mcamera.takepicture(null, mpicturecallback, mpicturecallback); } }
to capture image , save in specific folder, have :
- request permission on runtime (api 23)
- request image capture
- create folder
first of all, if target api 23, have follow new permission system asks user grant when used first time. in case, need have write_external_storage granted.
boolean haspermission = (contextcompat.checkselfpermission(this, manifest.permission.write_external_storage) == packagemanager.permission_granted); if (!haspermission) { activitycompat.requestpermissions(this, new string[]{manifest.permission.write_external_storage}, request_write_storage); } then, need create implicit intent capture photo. camera app appear in app chooser or selected automatically depending on user settings , installed apps.
intent intent = new intent(mediastore.action_image_capture); startactivityforresult(intent, request_image_capture); // final int = 1 finally, need create folder , indicate output android know save picture.
//intent = new intent... long timestamp = system.currenttimemillis(); file file = new file(""); file = new file(environment.getexternalstoragedirectory() + file.separator + "dcim" + file.separator + address + file.separator , "img_" + string.valueof(timestamp) + ".jpg"); intent.putextra(mediastore.extra_output, uri.fromfile(file)); //startactivityforresult... there lot of storage possibilities. can take here : https://developer.android.com/training/basics/data-storage/files.html
i have done nothing special in onactivityresult callback method. show toast confirm user picture saved successfully. code above in onclicklistener of imageview in case.
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