Android Error - Open Failed ENOENT

Question

I am trying to save some block coverage using an array of integers that simply saves the number of times a block is executed. For some reason, though, when I try and write to some files that I created ("BlockForHelper.txt" for example, 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 the 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();     } } 

Anyone know what might be causing this?

Answer 1

With sdk, you can't write to the root of internal storage. This cause your error.

Edit :

Based on your code, to use internal storage with 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

Put the text file in the assets directory. If there isnt an assets dir create one in the root of the project. Then you can use Context.getAssets().open("BlockForTest.txt"); to open a stream to this file.