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POAndroid : java.lang.NoClassDefFoundError File
 

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  1. POAndroid : java.lang.NoClassDefFoundError File
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    <p>This is my code:</p> <pre><code> public static void deleteFile(stPath){ File yourDir = new File(stPath); **// Line 210 in MyUtil.java** // .... /// } </code></pre> <p>and I call it in AsynTask method:</p> <pre><code>private class Backup extends AsyncTask&lt;String, Void, Exception&gt; { @Override protected void onPreExecute() { showProgressDialog(StringUtil.getString(R.string.backucking)); } @Override protected Exception doInBackground(String... params) { deleteFile(stPath); return null; } @Override protected void onPostExecute(Exception result) { showProgressDialog(StringUtil.getString(R.string.downloading)); } } </code></pre> <p>When I run, it throw a error java.lang.NoClassDefFoundError. Android cannot find java.io.File?? I don't understand. Can you explain for me? </p> <p>This is my logcat:</p> <pre><code>java.lang.RuntimeException: An error occured while executing doInBackground() --------- Stack trace --------- android.os.AsyncTask$3.done(AsyncTask.java:299) java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) java.util.concurrent.FutureTask.setException(FutureTask.java:124) java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) java.util.concurrent.FutureTask.run(FutureTask.java:137) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) java.lang.Thread.run(Thread.java:856) ------------------------------- --------- Cause --------- java.lang.NoClassDefFoundError: mypakage/d/a/b/d com.mypakage.util.b.e(MyUtil.java:210) com.mypakage.view.main.f.a(OneView.java:1046) com.mypakage.view.main.f.doInBackground(OneView.java:1) android.os.AsyncTask$2.call(AsyncTask.java:287) java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) java.util.concurrent.FutureTask.run(FutureTask.java:137) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) java.lang.Thread.run(Thread.java:856) ------------------------------- </code></pre>
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    1. PTQuestion
    1. USHikaru
    1. USHikaru
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    1. PO
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    1. This table or related slice is empty.
    1. COpost the stacktrace
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      1. POAndroid : java.lang.NoClassDefFoundError File
      1. USSpringLearner
    2. CONoClassDefFoundError means when you run or compile the program, the compiler cannot locate a class file which it needs to run/compile, but it can't locate it and so produces the error(This can happen for a variety of reasons). The stack trace NoClassDefFoundError:something something something should tell you the missing class. I you post that we may be able to give you a better idea of the likely cause.
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      1. POAndroid : java.lang.NoClassDefFoundError File
      1. USCS Ted
    3. COadd your deleteFile() method
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      1. POAndroid : java.lang.NoClassDefFoundError File
      1. USBiraj Zalavadia
 

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