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POCall alertdialog in another .java file
 

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  1. POCall alertdialog in another .java file
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    <p>I have one activity/java file (Browsefile.java) that would obtain the absolute path of the file. I want to pass this information to another java file for further processing (Sqlitefun.java). In the first stage, I just want to make sure the variable of file path is passed from Browsefile.java to Sqlitefun.java so I just create an alertdialog in the Sqlitefun.java file to test it. However, I have some issue on the context of the alertdialog object.</p> <p>(As Sqlitefun.java would further perform i/o and Sqlite processing tasks, I prefer to put this in another file.)</p> <p>Here are the codes for the files:</p> <p><strong>Browsefile.java</strong></p> <pre><code>public class Browsefile extends ListActivity { .... @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.browsefile); findViews(); getDir(root); } .... @Override protected void onListItemClick(ListView l, View v, int position, long id) { File file = new File(path.get(position)); if (file.isDirectory()) { if(file.canRead()) { getDir(path.get(position)); } else { selectpath = file.getAbsolutePath(); fpath.setText(selectpath); } } else { selectpath = file.getAbsolutePath(); fpath.setText(selectpath); } } private Button.OnClickListener importcsv = new Button.OnClickListener() { public void onClick(View v) { Sqlitefun firstClass = new Sqlitefun(); firstClass.getsAlertDialog(selectpath); } }; .... } </code></pre> <p><strong>Sqlitefun.java</strong></p> <pre><code>public class Sqlitefun { private Context context; public void getsAlertDialog(String filepath) { new AlertDialog.Builder(context) .setMessage(filepath) .setPositiveButton("OK", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub } }) .show(); } } </code></pre> <p>I have tried to use <code>this</code>, <code>Sqlitefun.this</code> to replace <code>context</code> in the line new <code>AlertDialog.Builder(context)</code> but none of this works. (Eclipse said <code>The constructor AlertDialog.Builder(Sqlitefun) is undefined</code> and did not allow me to compile. The above code did not have any error and allow me to compile, but there is a <code>nullpointer</code> exception for the Context. </p>
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