ContentResolver (insert) bringt Programm zum Absturz

[B]package de.docjunior.importel;

import java.io.File;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Contacts.People;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class ImportTelefonnummern extends Activity implements
        OnItemClickListener, OnClickListener {
    private TextView tv;
    private Button   bt;
    private ListView lv;

    private String path;
    private ArrayAdapter<String> files;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.filebrowser_dialog);

        tv = (TextView) findViewById(R.id.Pfad);
        
        bt = (Button) findViewById(R.id.Submit);
        bt.setOnClickListener(this);
        
        lv = (ListView) findViewById(R.id.FileList);
        lv.setOnItemClickListener(this);

        path = getString(R.string.browser_root);
        getFileList();

    }

    /** lists all files in a directory */
    protected void getFileList() {

        /* list files in directory */
        File dirFile = new File(path);
        if (dirFile.isDirectory()) {

            String fileList[] = dirFile.list();
            for (int i = 0; i < fileList.length; i++) {
                File fp = new File(path + fileList[i]);
                if (fp.isDirectory()) {
                    fileList[i] = fileList[i] + "/";
                }
            }

            files = new ArrayAdapter<String>(this,
                    android.R.layout.simple_list_item_1, fileList);

            /* create a ListAdapter from filelist */
            lv.setAdapter(files);

            /* enable listview textfilter */
            lv.setTextFilterEnabled(true);

        }
    }

    public void onItemClick(AdapterView<?> l, View v, int position, long id) {

        if (l == lv) {

            String newDir = path + files.getItem(position);
            File file = new File(newDir);
            // if file is a directory
            if (file.isDirectory()) {
                path = newDir;
                this.getFileList();
            }
            // set selection as text
            tv.setText(newDir);
        } 
    }

    public void onClick (View v) {
        if (v == bt) {
            // TODO: parse the File and import to Content Provider People
            ContentValues values = new ContentValues();

            // Add Abraham Lincoln to contacts and make him a favorite.
            values.put(People.NAME, "Abraham Lincoln");
            // 1 = the new contact is ad    ded to favorites
            // 0 = the new contact is not added to favorites
            values.put(People.STARRED, 1);

            Uri uri = getContentResolver().insert(People.CONTENT_URI, values);
            
        }
    }
    
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        // return super.onKeyDown(keyCode, event);
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            
            // recreate String
            String dirlist[] = path.split("/");
            String newDir = "/";

            // put slashes to directories
            for (int i = 1; i < (dirlist.length - 1); i++) {
                newDir = newDir + dirlist[i] + "/";
            }

            // recreate list
            path = newDir;
            tv.setText(path);
            this.getFileList();
        }
        return true;
    }

}[/B]