Android错误-打开失败ENOENT

Question

我正在尝试使用整数数组保存一些块覆盖率，该整数数组仅保存执行块的次数。但是由于某种原因，当我尝试写入创建的某些文件（例如，“ BlockForHelper.txt”，该文件是我在Eclipse中专门制作并放置在项目目录中）时，出现此错误：

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

并给我错误：

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();

    }

}

有人知道这可能是什么造成的吗？

Answer 1

使用sdk，您无法写入内部存储的根目录。这会导致您的错误。编辑：根据您的代码，将内部存储与sdk结合使用：final File dir = new File(context.getFilesDir() + "/nfs/guille/groce/users/nicholsk/workspace3/SQLTest");dir.mkdirs(); //create folders where write filesfinal File file = new File(dir, "BlockForTest.txt");