Android Error - Open Failed ENOENT

Question

I am trying to preserve some overlap of blocks using an array of integers that simply saves the number of times a block is executed. For some reason, however, when I try to write some files that I created (for example, "BlockForHelper.txt", which I made specifically in Eclipse and placed in the project directory), I get this error:

java.io.FileNotFoundException: /nfs/guille/groce/users/nicholsk/workspace3/SQLTest/BlockForTest: open failed: ENOENT (No such file or directory) at libcore.io.IoBridge.open(IoBridge.java:416) at java.io.FileOutputStream.<init>(FileOutputStream.java:88) at java.io.FileOutputStream.<init>(FileOutputStream.java:73) at com.example.sql2.SQLTest.blockCoverage(SQLTest.java:149) at com.example.sql2.test.SQLTestCase.testSuite(SQLTestCase.java:41) at java.lang.reflect.Method.invokeNative(Native Method) at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214) at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199) at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:190) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:175) at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1584) Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory) at libcore.io.Posix.open(Native Method) at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110) at libcore.io.IoBridge.open(IoBridge.java:400) ... 18 more 

and gives me an error:

 public void blockCoverage() throws IOException { String coverage = ""; for (int x = 0; x < 20; x++) coverage += x + " " + bb_count[x] + "\n"; File file = new File("/nfs/guille/groce/users/nicholsk/workspace3/SQLTest/BlockForTest.txt"); Writer out = new OutputStreamWriter(new FileOutputStream(file)); // Here try { out.write(coverage); } finally { out.close(); } } 

Does anyone know what could be causing this?

Answer 1

With sdk, you cannot write to the root of the internal storage. This will result in an error.

Edit:

Based on your code to use internal storage using sdk:

 final File dir = new File(context.getFilesDir() + "/nfs/guille/groce/users/nicholsk/workspace3/SQLTest"); dir.mkdirs(); //create folders where write files final File file = new File(dir, "BlockForTest.txt"); 

Answer 2

Place the text file in the resource directory. If the project root does not have the dir attribute, create it. Then you can use Context.getAssets().open("BlockForTest.txt"); to open the stream to this file.