java - android copy file display error -


it display 07-07 16:34:48.270: w/system.err(6050): copy java.io.ioexception given permission

<uses-permission android:name="android.permission.write_external_storage" /> <uses-permission android:name="android.permission.write_settings" />

file copy code : 

 file file = new file("/mnt/sdcard/infobooks/"); if (file.exists() == false) { file.mkdirs(); } inputstream myinput = this.getassets().open("book4.pdf"); string outfilename = environment.getexternalstoragedirectory()+"/infobooks/book4.pdf"; file file2=new file(outfilename); file2.createnewfile(); fileoutputstream myoutput = new fileoutputstream(outfilename); // transfer bytes inputfile outputfile byte[] buffer = new byte[1024]; int length; while ((length = myinput.read(buffer)) > 0) { myoutput.write(buffer, 0, length); } // close streams myoutput.flush(); myoutput.close(); myinput.close();

from sounds of it, error isn't related writing external storage rather reading assets. file 'book4.pdf' exist in assets directory? how big it? version of android running? there time when android had limit on file size in assets when compression being used. prior android 2.3, assetmanager couldn't read large compressed files (where large meant on 1mb in uncompressed state). way around not compress file (by giving extension aapt skips compression, such jpg or png), going command-line builds, or splitting files smaller chunks reconstituting them on device.

without full stacktrace, however, can't know cause of error is.


Comments

Post a Comment

Popular posts from this blog

javascript - backbone.js Collection.add() doesn't `construct` (`initialize`) an object -

<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd"> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> <script src="http://documentcloud.github.com/underscore/underscore-min.js"></script> <script src="http://documentcloud.github.com/backbone/backbone-min.js"></script> </head> <body> <button id="cmd_create_event" name="cmd_create_event" type="button">create new `event`</button> <script type="text/javascript"> var eventmodel = backbone.model.extend({ initialize : function() { console.log("`event` initialized. id: " + this.cid); this.bind("change:status", function() { console.log(this.get("status") + " value `status`"); }); this.bind("error", function(model, e...
Read more

php - Get uncommon values from two or more arrays -

is there function in php give array of uncommon values 2 or more arrays? for example: $array1 = array( "green", "red", "blue"); $array2 = array( "green", "yellow", "red"); .... $result = function_needed($array1, $array2,...); print_r($result); should give output: array("blue", "yellow", ...); use array_diff , array_merge : $result = array_merge(array_diff($array1, $array2), array_diff($array2, $array1)); here's demo. for multiple arrays, combine callback , array_reduce : function unique(&$a, $b) { return $a ? array_merge(array_diff($a, $b), array_diff($b, $a)) : $b; } $arrays = array( array('green', 'red', 'blue'), array('green', 'yellow', 'red') ); $result = array_reduce($arrays, 'unique'); and here's demo of that.
Read more

Adding duplicate array rows in Php -

i create function in php adds rows of array shared column value. so input. $test = array( array("c", 5, 6), array("c", 2, 3), array("test", 5, 6) ); and output. $testduplicatefree = array( array("c", 7, 9), array("test", 5, 6) ) ); i'm thinking function combine_duplicates($array,$col){ ... ... return $duplicatefreearray; } where $col duplicate free array. so, in case, combine_duplicates($test,0); would me desired output. this. <?php function combine_duplicates($array,$col) { $index = array(); foreach ($array $row) { $key = $row[$col]; if (!isset($index[$key])) { $index[$key] = $row; } else { ($i = 0; $i < count($row); ++$i) { if ($i != $col) { $index[$key][$i] += $row[$i]; } } } } return array_values($index); } $array = array( array("c", 5, 6), array("c", 2, 3), array("test", 5, 6) ); print_r(combine_duplicates($array, 0)); try here: http://codepad.org/mdhesqhi
Read more