Program: 69258
Project: 69258
Buggy source:
@Override public void onClick(DialogInterface arg0,int arg1){
  if (arg1 == -2) {
    path=null;
    childs=new String[fontpath.size()];
    for (int i=0; i < childs.length; ++i)     childs[i]=adpFont.getItem(i + 3);
    new AlertDialog.Builder(this).setTitle(R.string.rem).setItems(childs,this).setOnCancelListener(this).show();
    return;
  }
  if (arg1 != -1 && path == null) {
    childs=null;
    adpFont.remove(adpFont.getItem(arg1 + 3));
    try {
      if (fontpath.get(arg1).startsWith(this.getFilesDir().getCanonicalPath()))       new File(fontpath.get(arg1)).delete();
    }
 catch (    IOException e) {
    }
    fontpath.remove(arg1);
    if (fidx == arg1 + 1)     fidx=0;
    if (fidx > arg1 + 1)     --fidx;
    if (fontpath.size() == 0)     adpFont.remove(adpFont.getItem(2));
    spnFont.setSelection(fidx == 0 ? 0 : fidx + 2);
    return;
  }
  if (arg1 == -1)   path="String_Node_Str";
 else {
    if (path.endsWith("String_Node_Str")) {
      if (arg1 == 0)       path=path.substring(0,path.lastIndexOf('/') + 1);
 else {
        try {
          ZipFile zf=new ZipFile(path);
          ZipEntry ze=zf.getEntry(childs[arg1]);
          InputStream is=zf.getInputStream(ze);
          File of=new File(this.getFilesDir(),Long.toHexString(ze.getCrc()) + "String_Node_Str" + new File(ze.getName()).getName());
          of.getParentFile().mkdirs();
          OutputStream os=new FileOutputStream(of);
          byte[] buf=new byte[256];
          int size;
          while ((size=is.read(buf)) > 0)           os.write(buf,0,size);
          os.close();
          is.close();
          zf.close();
          path=of.getCanonicalPath();
        }
 catch (        ZipException e) {
          Toast.makeText(this,R.string.cantread,Toast.LENGTH_SHORT).show();
          spnFont.setSelection(0);
          path=null;
          return;
        }
catch (        IOException e) {
        }
      }
    }
 else {
      if (path.length() != 1 && arg1 == 0) {
        for (        String root : roots)         if (path.equals('/' + root))         path="String_Node_Str";
      }
      if (path.length() == 0)       path="String_Node_Str";
 else       path+=childs[arg1];
    }
  }
  if (path.charAt(path.length() - 1) != '/' && !path.endsWith("String_Node_Str")) {
    childs=null;
    Typeface tf;
    try {
      tf=Typeface.createFromFile(path);
    }
 catch (    RuntimeException e) {
      tf=null;
      Toast.makeText(this,R.string.cantopen,Toast.LENGTH_SHORT).show();
    }
    if (tf != null) {
      if (adpFont.getCount() < 3)       adpFont.add(getResources().getString(R.string.rem));
      for (int i=0; i < fontpath.size(); ++i) {
        if (!path.equals(fontpath.get(i)))         continue;
        adpFont.remove(adpFont.getItem(i + 3));
        fontpath.remove(i);
      }
      adpFont.add(new File(path).getName());
      fontpath.add(path);
    }
    spnFont.setSelection(tf == null ? 0 : adpFont.getCount() - 1);
    path=null;
  }
 else {
    try {
      if (path.length() == 1) {
        String[] dirs=new String[4];
        dirs[0]=Environment.getExternalStorageDirectory().getCanonicalPath();
        dirs[1]=Environment.getDataDirectory().getCanonicalPath();
        dirs[2]=Environment.getDownloadCacheDirectory().getCanonicalPath();
        dirs[3]=Environment.getRootDirectory().getCanonicalPath();
        for (int i=0; i < dirs.length; ++i)         for (int j=0; j < dirs.length; ++j)         if (i != j && dirs[i].length() > 0 && dirs[j].length() > 0 && dirs[i].startsWith(dirs[j]) && new File(dirs[j]).canRead())         dirs[i]="String_Node_Str";
        int cnt=0;
        for (        String dir1 : dirs) {
          if (!(dir1.length() > 0))           continue;
          if (!new File(dir1).canRead())           continue;
          ++cnt;
        }
        roots=new String[cnt];
        int j=0;
        for (        String dir : dirs) {
          if (!(dir.length() > 0))           continue;
          if (!new File(dir).canRead())           continue;
          roots[j]=dir.substring(1) + '/';
          ++j;
        }
        Arrays.sort(roots);
        childs=roots;
      }
 else       if (path.endsWith("String_Node_Str")) {
        try {
          ZipFile zf=new ZipFile(path);
          int cnt=1;
          for (Enumeration<? extends ZipEntry> e=zf.entries(); e.hasMoreElements(); )           if (!e.nextElement().isDirectory())           ++cnt;
          childs=new String[cnt];
          childs[0]="String_Node_Str";
          int j=1;
          for (Enumeration<? extends ZipEntry> e=zf.entries(); e.hasMoreElements(); ) {
            ZipEntry entry=e.nextElement();
            if (entry.isDirectory())             continue;
            childs[j]=entry.getName();
            ++j;
          }
          zf.close();
        }
 catch (        ZipException e) {
          Toast.makeText(this,R.string.cantread,Toast.LENGTH_SHORT).show();
          spnFont.setSelection(0);
          path=null;
          return;
        }
      }
 else {
        File f=new File(path);
        path=f.getCanonicalPath();
        if (!path.endsWith("String_Node_Str"))         path+='/';
        File[] fl=f.listFiles();
        if (fl == null) {
          Toast.makeText(this,R.string.cantread,Toast.LENGTH_SHORT).show();
          spnFont.setSelection(0);
          path=null;
          return;
        }
        int cnt=1;
        for (        File aFl1 : fl)         if (aFl1.canRead())         ++cnt;
        childs=new String[cnt];
        childs[0]="String_Node_Str";
        int j=1;
        for (        File aFl : fl) {
          if (!aFl.canRead())           continue;
          childs[j]=aFl.getName();
          if (aFl.isDirectory())           childs[j]+='/';
          ++j;
        }
      }
      new AlertDialog.Builder(this).setTitle(path).setItems(childs,this).setOnCancelListener(this).show();
    }
 catch (    IOException e) {
    }
  }
}

Fixed version (ground truth):
@Override public void onClick(DialogInterface arg0,int arg1){
  if (arg1 == -2) {
    path=null;
    childs=new String[fontpath.size()];
    for (int i=0; i < childs.length; ++i)     childs[i]=adpFont.getItem(i + 3);
    new AlertDialog.Builder(this).setTitle(R.string.rem).setItems(childs,this).setOnCancelListener(this).show();
    return;
  }
  if (arg1 != -1 && path == null) {
    childs=null;
    adpFont.remove(adpFont.getItem(arg1 + 3));
    try {
      if (fontpath.get(arg1).startsWith(this.getFilesDir().getCanonicalPath()))       new File(fontpath.get(arg1)).delete();
    }
 catch (    IOException e) {
    }
    fontpath.remove(arg1);
    if (fidx == arg1 + 1)     fidx=0;
    if (fidx > arg1 + 1)     --fidx;
    if (fontpath.size() == 0)     adpFont.remove(adpFont.getItem(2));
    spnFont.setSelection(fidx == 0 ? 0 : fidx + 2);
    return;
  }
  if (arg1 == -1)   path="String_Node_Str";
 else {
    if (path.endsWith("String_Node_Str")) {
      if (arg1 == 0)       path=path.substring(0,path.lastIndexOf('/') + 1);
 else {
        try {
          ZipFile zf=new ZipFile(path);
          try {
            zf.entries().nextElement();
          }
 catch (          IllegalArgumentException e) {
            zf.close();
            PASSED: {
              if (Build.VERSION.SDK_INT >= 24) {
                for (                Charset charset : Charset.availableCharsets().values()) {
                  zf=new ZipFile(path,charset);
                  try {
                    zf.entries().nextElement();
                  }
 catch (                  IllegalArgumentException e2) {
                    zf.close();
                    continue;
                  }
                  break PASSED;
                }
              }
              Toast.makeText(this,R.string.malformed,Toast.LENGTH_SHORT).show();
              spnFont.setSelection(0);
              path=null;
              return;
            }
          }
          ZipEntry ze=zf.getEntry(childs[arg1]);
          InputStream is=zf.getInputStream(ze);
          File of=new File(this.getFilesDir(),Long.toHexString(ze.getCrc()) + "String_Node_Str" + new File(ze.getName()).getName());
          of.getParentFile().mkdirs();
          OutputStream os=new FileOutputStream(of);
          byte[] buf=new byte[256];
          int size;
          while ((size=is.read(buf)) > 0)           os.write(buf,0,size);
          os.close();
          is.close();
          zf.close();
          path=of.getCanonicalPath();
        }
 catch (        ZipException e) {
          Toast.makeText(this,R.string.cantread,Toast.LENGTH_SHORT).show();
          spnFont.setSelection(0);
          path=null;
          return;
        }
catch (        IOException e) {
        }
      }
    }
 else {
      if (path.length() != 1 && arg1 == 0) {
        for (        String root : roots)         if (path.equals('/' + root))         path="String_Node_Str";
      }
      if (path.length() == 0)       path="String_Node_Str";
 else       path+=childs[arg1];
    }
  }
  if (path.charAt(path.length() - 1) != '/' && !path.endsWith("String_Node_Str")) {
    childs=null;
    Typeface tf;
    try {
      tf=Typeface.createFromFile(path);
    }
 catch (    RuntimeException e) {
      tf=null;
      Toast.makeText(this,R.string.cantopen,Toast.LENGTH_SHORT).show();
    }
    if (tf != null) {
      if (adpFont.getCount() < 3)       adpFont.add(getResources().getString(R.string.rem));
      for (int i=0; i < fontpath.size(); ++i) {
        if (!path.equals(fontpath.get(i)))         continue;
        adpFont.remove(adpFont.getItem(i + 3));
        fontpath.remove(i);
      }
      adpFont.add(new File(path).getName());
      fontpath.add(path);
    }
    spnFont.setSelection(tf == null ? 0 : adpFont.getCount() - 1);
    path=null;
  }
 else {
    try {
      if (path.length() == 1) {
        String[] dirs=new String[4];
        dirs[0]=Environment.getExternalStorageDirectory().getCanonicalPath();
        dirs[1]=Environment.getDataDirectory().getCanonicalPath();
        dirs[2]=Environment.getDownloadCacheDirectory().getCanonicalPath();
        dirs[3]=Environment.getRootDirectory().getCanonicalPath();
        for (int i=0; i < dirs.length; ++i)         for (int j=0; j < dirs.length; ++j)         if (i != j && dirs[i].length() > 0 && dirs[j].length() > 0 && dirs[i].startsWith(dirs[j]) && new File(dirs[j]).canRead())         dirs[i]="String_Node_Str";
        int cnt=0;
        for (        String dir1 : dirs) {
          if (!(dir1.length() > 0))           continue;
          if (!new File(dir1).canRead())           continue;
          ++cnt;
        }
        roots=new String[cnt];
        int j=0;
        for (        String dir : dirs) {
          if (!(dir.length() > 0))           continue;
          if (!new File(dir).canRead())           continue;
          roots[j]=dir.substring(1) + '/';
          ++j;
        }
        Arrays.sort(roots);
        childs=roots;
      }
 else       if (path.endsWith("String_Node_Str")) {
        try {
          ZipFile zf=new ZipFile(path);
          try {
            zf.entries().nextElement();
          }
 catch (          IllegalArgumentException e) {
            zf.close();
            PASSED: {
              if (Build.VERSION.SDK_INT >= 24) {
                for (                Charset charset : Charset.availableCharsets().values()) {
                  zf=new ZipFile(path,charset);
                  try {
                    zf.entries().nextElement();
                  }
 catch (                  IllegalArgumentException e2) {
                    zf.close();
                    continue;
                  }
                  break PASSED;
                }
              }
              Toast.makeText(this,R.string.malformed,Toast.LENGTH_SHORT).show();
              spnFont.setSelection(0);
              path=null;
              return;
            }
          }
          int cnt=1;
          for (Enumeration<? extends ZipEntry> e=zf.entries(); e.hasMoreElements(); )           if (!e.nextElement().isDirectory())           ++cnt;
          childs=new String[cnt];
          childs[0]="String_Node_Str";
          int j=1;
          for (Enumeration<? extends ZipEntry> e=zf.entries(); e.hasMoreElements(); ) {
            ZipEntry entry=e.nextElement();
            if (entry.isDirectory())             continue;
            childs[j]=entry.getName();
            ++j;
          }
          zf.close();
        }
 catch (        ZipException e) {
          Toast.makeText(this,R.string.cantread,Toast.LENGTH_SHORT).show();
          spnFont.setSelection(0);
          path=null;
          return;
        }
      }
 else {
        File f=new File(path);
        path=f.getCanonicalPath();
        if (!path.endsWith("String_Node_Str"))         path+='/';
        File[] fl=f.listFiles();
        if (fl == null) {
          Toast.makeText(this,R.string.cantread,Toast.LENGTH_SHORT).show();
          spnFont.setSelection(0);
          path=null;
          return;
        }
        int cnt=1;
        for (        File aFl1 : fl)         if (aFl1.canRead())         ++cnt;
        childs=new String[cnt];
        childs[0]="String_Node_Str";
        int j=1;
        for (        File aFl : fl) {
          if (!aFl.canRead())           continue;
          childs[j]=aFl.getName();
          if (aFl.isDirectory())           childs[j]+='/';
          ++j;
        }
      }
      new AlertDialog.Builder(this).setTitle(path).setItems(childs,this).setOnCancelListener(this).show();
    }
 catch (    IOException e) {
    }
  }
}