android中contentprovider通讯录

package com.bestlinks.wp; import android.app.AlertDialog; import android.app.ListActivity; import android.content.DialogInterface; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleCursorAdapter; public class MainList extends ListActivity { /** Called when the activity is first created. */ ListView listView; ListAdapter adapter; Cursor c; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); listView = (ListView) findViewById(android.R.id.list); setAdapter(); listView.setOnItemLongClickListener(longClickItemListener); } AdapterView.OnItemLongClickListener longClickItemListener = new AdapterView.OnItemLongClickListener() { public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { final CharSequence[] items = { "编辑联系人", "删除联系人" }; AlertDialog.Builder builder = new AlertDialog.Builder(MainList.this); builder.setTitle(c.getString(1)); builder.setItems(items, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int item) { if (item == 0) { Intent intent = new Intent(MainList.this, AddContact.class); intent.setAction(AddContact.EDIT_TABLE_ACTION); Uri uri = Uri.parse(ContactProvider.CONTENT_URI + "/" + c.getString(0)); intent.setData(uri); startActivity(intent); } else if (item == 1) { new AlertDialog.Builder(MainList.this).setTitle("删除") .setMessage("将会删除此联系人").setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick( DialogInterface dialog, int id) { Uri uri = Uri .parse(ContactProvider.CONTENT_URI + "/" + c .getString(0)); getContentResolver().delete( uri, null, null); setAdapter(); } }).setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick( DialogInterface dialog, int id) { dialog.cancel(); } }).show(); } } }); return false; } }; private void setAdapter() { // TODO Auto-generated method stub Uri uri = ContactProvider.CONTENT_URI; c = getContentResolver().query(uri, null, null, null,null); startManagingCursor(c); adapter = new SimpleCursorAdapter(this, R.layout.contact_list_item, c, new String[] { "name", "tel" }, new int[] { R.id.name_list, R.id.tel_list }); setListAdapter(adapter); } @Override public boolean onCreateOptionsMenu(Menu menu) { this.getMenuInflater().inflate(R.menu.option_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.item_add: Intent intent = new Intent(this, AddContact.class); intent.setAction(AddContact.INSERT_TABLE_ACTION); startActivity(intent); return true; case R.id.item_cancel: return true; } return super.onOptionsItemSelected(item); } }