hprof file not generated by Android application

I am debugging a Android slideshow playing app in eclipse. I am trying to generate heap dump in order to find the origin of memory leak but no hprof file is generated in the folder"/data/data/app folder/"android device I am testing. The following is my code for generating the files. What's wrong with that? Thanks in advance!

public class HeapDumpingUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
private static final String HPROF_DUMP_BASENAME = "leak-app-";
private final String dataDir;

public HeapDumpingUncaughtExceptionHandler(String dataDir) {
    this.dataDir = dataDir;
    Date d = new Date();
    CharSequence s  = DateFormat.format("yyyy-MM-dd_HH-mm-ss", d.getTime());

    String absPath = new File(dataDir, HPROF_DUMP_BASENAME +s+".hprof").getAbsolutePath();

                     try {
                    Log.d(this.getClass().toString(),"memory leak app handler: initial heap dump created "+ absPath);
                         Debug.dumpHprofData(absPath);

                     } catch (IOException e) {
                         e.printStackTrace();
                     }
}

@Override
public void uncaughtException(Thread thread, Throwable ex) {

    Date d = new Date();
    CharSequence s  = DateFormat.format("yyyy-MM-dd_HH-mm-ss", d.getTime());

    String absPath = new File(dataDir, HPROF_DUMP_BASENAME+s+".hprof").getAbsolutePath();

    Log.d(this.getClass().toString(),"memory leak app handler: exception caught : "+ex.getClass()+ " heap dump path "+absPath);
        try {
            Debug.dumpHprofData(absPath);
        } catch (IOException e) {
            e.printStackTrace();
        }

    ex.printStackTrace();
}
}

Finally find out I dun reli need this code to generate hprof as DDMS already has this function. Sorry for disturbing you guys and thank you.