android 通讯录的查看和添加

/* * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.example.android.contactmanager;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.provider.ContactsContract;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.ListView;import android.widget.SimpleCursorAdapter;public final class ContactManager extends Activity{    public static final String TAG = "ContactManager";    private Button mAddAccountButton;    private ListView mContactList;    private boolean mShowInvisible;    private CheckBox mShowInvisibleControl;    /**     * Called when the activity is first created. Responsible for initializing the UI.     */    @Override    public void onCreate(Bundle savedInstanceState)    {        Log.v(TAG, "Activity State: onCreate()");        super.onCreate(savedInstanceState);        setContentView(R.layout.contact_manager);        // Obtain handles to UI objects        mAddAccountButton = (Button) findViewById(R.id.addContactButton);        mContactList = (ListView) findViewById(R.id.contactList);        mShowInvisibleControl = (CheckBox) findViewById(R.id.showInvisible);        // Initialize class properties        mShowInvisible = false;        mShowInvisibleControl.setChecked(mShowInvisible);        // Register handler for UI elements        mAddAccountButton.setOnClickListener(new View.OnClickListener() {            public void onClick(View v) {                Log.d(TAG, "mAddAccountButton clicked");                launchContactAdder();            }        });        mShowInvisibleControl.setOnCheckedChangeListener(new OnCheckedChangeListener() {            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                Log.d(TAG, "mShowInvisibleControl changed: " + isChecked);                mShowInvisible = isChecked;                populateContactList();            }        });        // Populate the contact list        populateContactList();    }    /**     * Populate the contact list based on account currently selected in the account spinner.     */    private void populateContactList() {        // Build adapter with contact entries        Cursor cursor = getContacts();        String[] fields = new String[] {                ContactsContract.Data.DISPLAY_NAME        };        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.contact_entry, cursor,                fields, new int[] {R.id.contactEntryText});        mContactList.setAdapter(adapter);    }    /**     * Obtains the contact list for the currently selected account.     *     * @return A cursor for for accessing the contact list.     */    private Cursor getContacts()    {        // Run query        Uri uri = ContactsContract.Contacts.CONTENT_URI;        String[] projection = new String[] {                ContactsContract.Contacts._ID,                ContactsContract.Contacts.DISPLAY_NAME        };        String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '" +                (mShowInvisible ? "0" : "1") + "'";        String[] selectionArgs = null;        String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";        return managedQuery(uri, projection, selection, selectionArgs, sortOrder);    }    /**     * Launches the ContactAdder activity to add a new contact to the selected accont.     */    protected void launchContactAdder() {        Intent i = new Intent(this, ContactAdder.class);        startActivity(i);    }}