Android_LoaderManager获取联系人

故事概况:
小农在开发的时候队长叫本人封装一个工具类,直接调用就能调起系统通讯录,选择人员后,把电话号码带回到UI……..
于是故事开始了….

• 写一个静态的类用来调用方法
• 封装进入系统联系人界面的方法如下

// 进入系统通讯录界面 public static void gotoSystemContact(Activity activityContext, int requestCode) {        Intent moblieIntent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);        activityContext.startActivityForResult(moblieIntent, requestCode);    }

• 写一个获取联系人内容的方法,

/**     * get contact phone     *     * @param cursor cursor     * @return all phone nums     */    private static List<String> getContactPhone(Activity activityContext, Cursor cursor) {        ArrayList<String> arrayList = new ArrayList<String>();        Cursor phone = null;        try {            int phoneColumn = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);            int phoneNum = cursor.getInt(phoneColumn);            if (phoneNum > 0) {                int idColumn = cursor.getColumnIndex(ContactsContract.Contacts._ID);                String contactId = cursor.getString(idColumn);                phone = activityContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + contactId, null, null);                if (phone != null && phone.moveToFirst()) {                    for (; !phone.isAfterLast(); phone.moveToNext()) {                        int index = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);                        int typeindex = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);                        int phone_type = phone.getInt(typeindex);                        String phoneNumber = phone.getString(index).trim();                        arrayList.add(phoneNumber);                    }                }            }        } catch (Exception e) {        }        if (phone != null && !phone.isClosed()) {            phone.close();        }        return arrayList;    }

• 解析联系人去除空格乱七八糟的如下方法

/**     * onActivityResult call the method get the contact phone num     *     * @param activityContext activity     * @param data            onActivityresult data     * @return phoneNum     */    public static String getContactResult(Activity activityContext, Intent data) {        String phoneNum = "";        Cursor cursor = null;        try {            if (data != null) {                Uri contactData = data.getData();                if (contactData != null) {                    cursor = activityContext.managedQuery(contactData, null, null, null, null);                }                if (cursor != null && cursor.moveToFirst()) {                    String name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));                    List<String> numbers = getContactPhone(activityContext, cursor);                    if (numbers != null && numbers.size() > 0) {                        String[] mPhoneNumbers = new String[numbers.size()];                        for (int i = 0; i < numbers.size(); i++) {                            String number = numbers.get(i);                            String newNumber = number.replaceAll("[^\\d]", "");                            mPhoneNumbers[i] = newNumber;                        }                        phoneNum = mPhoneNumbers[0];                    }                }            }        } catch (Exception e) {        }        return phoneNum;    }

就是这个方法,看到没有很顺利的返回了 phoneNum,但是数据库的coucor没有关闭,一个严谨的程序员怎么能忍受游标不关闭呢,其实我是能忍受的…..队长不能接受,必须要关闭 关闭能带来的问题是什么,第一次能获取到联系人号码,然后第二次执行的时候 在UI的onActivityResult里面会崩溃并且报游标关闭错误….

如下图:

但是如果你不关闭游标的话…..传说中的代码不严谨,内存泄漏什么的一堆,于是就的改…牺牲点app内存和一点点的代码不严谨你完成这个功能就需要一个操作,
ctr + D 删除关闭代码就行了…

但是这不允许,第一用了过时的API,第二游标必须关闭,所以只能修改实现方式

1. 新的实现方法,采用LoaderManager来完成,
   我们修改下获取手机号的方法如下

    /**     * onActivityResult call the method get the contact phone num     *     * @param activityContext     activity     * @param data                data     * @param phoneNumGetListener phone num callback     */    public static void getContactResult(final Activity activityContext, Intent data, final OnPhoneNumGetListener phoneNumGetListener) {        if (data != null) {            final Uri contactData = data.getData();            if (contactData != null) {                activityContext.getLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {                            @Override                            public Loader<Cursor> onCreateLoader(int id, Bundle args) {                                CursorLoader cursorLoader = new CursorLoader(activityContext);                                cursorLoader.setUri(contactData);                                return cursorLoader;                            }                            @Override                            public void onLoadFinished(Loader<Cursor> loader, Cursor data) {                                if (data != null && data.moveToFirst()) {                                    String name = data.getString(data.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));                                    List<String> numbers = getContactPhone(activityContext, data);                                    if (numbers != null && numbers.size() > 0) {                                        String[] mPhoneNumbers = new String[numbers.size()];                                        for (int i = 0; i < numbers.size(); i++) {                                            String number = numbers.get(i);                                            String newNumber = number.replaceAll("[^\\d]", "");                                            mPhoneNumbers[i] = newNumber;                                        }                                        if (phoneNumGetListener != null) {                                            phoneNumGetListener.getPhoneNum(mPhoneNumbers[0]);                                        }                                    }                                    data.close();                                    // when get data do not forget destoryloader                                    activityContext.getLoaderManager().destroyLoader(0);                                }                            }                            @Override                            public void onLoaderReset(Loader<Cursor> loader) {                            }                        }                );            }        }    }

这里我们传入了获得到手机号的一个异步回调,这就是LoaderManager的最大的区别,cursor = activityContext.managedQuery(contactData, null, null, null, null);

这方法是同步的,而且这个方法是过时的……

这样我们获取手机号的方法和解析就放到了 onLoadFinished里面

代码基本就这么多,activity里面只需要这样既可

  @Override    protected void onActivityResult(int requestCode, int resultCode, final Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == MOBILE_REQUEST_CODE) {            ATContactUtilLoadManager.getContactResult(this, data, new ATContactUtilLoadManager.OnPhoneNumGetListener() {                @Override                public void getPhoneNum(String num) {                    phoneNum.setText("loadmanager得到的>>>> " + num);                }            });        }    }

这样我们就能通过loadmanager拿到手机号了,关键的是curcor关闭了,任务完成了…..可能是最近看乔布斯传魔怔了,要是以前的脾气,早就pk起来了 ,删除一句代码就能解决干嘛费劲搞这个loadermanager
反过来想想加入 谷歌删除了过时的API. 或者由于你这个游标没关闭造成的内存泄漏正好达到crash的内存上限..罪过就大了..从自我做起吧,写一篇博客记录下今天的内容,两种工具类喜欢的可以看下
完整代码如下:
**

• 第一种普通方法代码

**

package com.asiatravel.atjardemo.utils;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.provider.ContactsContract;import java.util.ArrayList;import java.util.List;/** * <pre>use like this</pre> * <pre>1, call gotoSystemContact</pre> * <pre>2, onActivityResult call getContactResult</pre> * * Created by jsion on 16/5/10. */public class ATContactUtilNormal {    private ATContactUtilNormal() {    }    public static void gotoSystemContact(Activity activityContext, int requestCode) {        Intent moblieIntent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);        activityContext.startActivityForResult(moblieIntent, requestCode);    }    /**     * onActivityResult call the method get the contact phone num     *     * @param activityContext activity     * @param data            onActivityresult data     * @return phoneNum     */    public static String getContactResult(Activity activityContext, Intent data) {        String phoneNum = "";        Cursor cursor = null;        try {            if (data != null) {                Uri contactData = data.getData();                if (contactData != null) {                    cursor = activityContext.managedQuery(contactData, null, null, null, null);                }                if (cursor != null && cursor.moveToFirst()) {                    String name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));                    List<String> numbers = getContactPhone(activityContext, cursor);                    if (numbers != null && numbers.size() > 0) {                        String[] mPhoneNumbers = new String[numbers.size()];                        for (int i = 0; i < numbers.size(); i++) {                            String number = numbers.get(i);                            String newNumber = number.replaceAll("[^\\d]", "");                            mPhoneNumbers[i] = newNumber;                        }                        phoneNum = mPhoneNumbers[0];                    }                }            }        } catch (Exception e) {        }        return phoneNum;    }    /**     * get contact phone     *     * @param cursor cursor     * @return all phone nums     */    private static List<String> getContactPhone(Activity activityContext, Cursor cursor) {        ArrayList<String> arrayList = new ArrayList<String>();        Cursor phone = null;        try {            int phoneColumn = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);            int phoneNum = cursor.getInt(phoneColumn);            if (phoneNum > 0) {                int idColumn = cursor.getColumnIndex(ContactsContract.Contacts._ID);                String contactId = cursor.getString(idColumn);                phone = activityContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + contactId, null, null);                if (phone != null && phone.moveToFirst()) {                    for (; !phone.isAfterLast(); phone.moveToNext()) {                        int index = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);                        int typeindex = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);                        int phone_type = phone.getInt(typeindex);                        String phoneNumber = phone.getString(index).trim();                        arrayList.add(phoneNumber);                    }                }            }        } catch (Exception e) {        }        if (phone != null && !phone.isClosed()) {            phone.close();        }        return arrayList;    }}

**

• 第二种,loadermanager实现

**

package com.asiatravel.atjardemo.utils;import android.app.Activity;import android.app.LoaderManager;import android.content.CursorLoader;import android.content.Intent;import android.content.Loader;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.provider.ContactsContract;import java.util.ArrayList;import java.util.List;/** * <pre>use like this</pre> * <pre>1, call gotoSystemContact</pre> * <pre>2, onActivityResult call getContactResult</pre> * * Created by jsion on 16/5/10. */public class ATContactUtilLoadManager {    private ATContactUtilLoadManager() {    }    public static void gotoSystemContact(Activity activityContext, int requestCode) {        Intent moblieIntent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);        activityContext.startActivityForResult(moblieIntent, requestCode);    }    /**     * onActivityResult call the method get the contact phone num     *     * @param activityContext activity     * @param data            onActivityresult data     * @return phoneNum     */    public static void getContactResult(final Activity activityContext, Intent data, final OnPhoneNumGetListener phoneNumGetListener) {        if (data != null) {            final Uri contactData = data.getData();            if (contactData != null) {                activityContext.getLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {                            @Override                            public Loader<Cursor> onCreateLoader(int id, Bundle args) {                                CursorLoader cursorLoader = new CursorLoader(activityContext);                                cursorLoader.setUri(contactData);                                return cursorLoader;                            }                            @Override                            public void onLoadFinished(Loader<Cursor> loader, Cursor data) {                                if (data != null && data.moveToFirst()) {                                    String name = data.getString(data.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));                                    List<String> numbers = ATContactUtilLoadManager.getContactPhone(activityContext, data);                                    if (numbers != null && numbers.size() > 0) {                                        String[] mPhoneNumbers = new String[numbers.size()];                                        for (int i = 0; i < numbers.size(); i++) {                                            String number = numbers.get(i);                                            String newNumber = number.replaceAll("[^\\d]", "");                                            mPhoneNumbers[i] = newNumber;                                        }                                        if (phoneNumGetListener != null) {                                            phoneNumGetListener.getPhoneNum(mPhoneNumbers[0]);                                        }                                    }                                    data.close();                                    activityContext.getLoaderManager().destroyLoader(0);                                }                            }                            @Override                            public void onLoaderReset(Loader<Cursor> loader) {                            }                        }                );            }        }    }    /**     * get contact phone     *     * @param cursor cursor     * @return all phone nums     */    public static List<String> getContactPhone(Activity activityContext, Cursor cursor) {        ArrayList<String> arrayList = new ArrayList<String>();        Cursor phone = null;        try {            int phoneColumn = cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);            int phoneNum = cursor.getInt(phoneColumn);            if (phoneNum > 0) {                int idColumn = cursor.getColumnIndex(ContactsContract.Contacts._ID);                String contactId = cursor.getString(idColumn);                phone = activityContext.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + contactId, null, null);                if (phone != null && phone.moveToFirst()) {                    for (; !phone.isAfterLast(); phone.moveToNext()) {                        int index = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);                        int typeindex = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);                        int phone_type = phone.getInt(typeindex);                        String phoneNumber = phone.getString(index).trim();                        arrayList.add(phoneNumber);                    }                }            }        } catch (Exception e) {//            ATLogUtil.e(e.toString());        }        if (phone != null && !phone.isClosed()) {            phone.close();        }        return arrayList;    }    public interface OnPhoneNumGetListener {        void getPhoneNum(String phoneNum);    }}