快速拨号界面
java代码：Cursor phoneCursor = this.managedQuery(ontactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null,null, null);
再根据号码来查联系人
if(0 < phoneCursor.getCount()){
phoneCursor.moveToFirst();
// find all contact list
while (phoneCursor.getPosition() != phoneCursor.getCount()) {
ContactEntity contactentity = new ContactEntity();
contactentity.contact_id = phoneCursor
.getLong(phoneCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID));
contactentity.contacts_phone_type = phoneCursor
.getInt(phoneCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE));
contactentity.contacts_phone_number = phoneCursor
.getString(phoneCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)).replace(
"-", "");
contactCursor = this.managedQuery(
ContactsContract.Contacts.CONTENT_URI, null,
ContactsContract.Contacts._ID + "="
+ contactentity.contact_id, null, null);
contactCursor.moveToFirst();
contactentity.contacts_display_name = contactCursor
.getString(contactCursor
.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)).replace(
"-", "");
Uri uri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI,
contactentity.contact_id);
InputStream input = ContactsContract.Contacts.openContactPhotoInputStream(getContentResolver(), uri);
if(null != input){
contactentity.contact_phone_bmp = BitmapFactory.decodeStream(input);
}
// spell name can
contactentity.spellName = PinYin.getInstance(this).getPinyinString(
contactentity.contacts_display_name);
Log.i(TAG, "contactentity.contact_id: " + contactentity.contact_id
+ " contactentity.contacts_phone_type: "
+ contactentity.contacts_phone_type
+ " contactentity.contacts_phone_number: "
+ contactentity.contacts_phone_number
+ "contactentity.contacts_display_name: "
+ contactentity.contacts_display_name
+ "contactentity.contact_phone_bmp: "
+ contactentity.contact_phone_bmp);
phoneCursor.moveToNext();
customArrayList.add(contactentity);
}
经过测试发现性能消耗主要在这个while循环当中！因为在循环当中在加一个查询数据库操作自然慢！
解决方案：
发现在查询ContactsContract.CommonDataKinds.Phone.CONTENT_URI数据库时其实可以吧
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.PHOTO_ID查询出来
那么把原来的
private final static String[] mContactsProjection = new String[] {
ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
ContactsContract.CommonDataKinds.Phone.TYPE,
ContactsContract.CommonDataKinds.Phone.NUMBER,
};
改为
private final static String[] mContactsProjection = new String[] {
ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
ContactsContract.CommonDataKinds.Phone.TYPE,
ContactsContract.CommonDataKinds.Phone.NUMBER,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.PHOTO_ID
};
下面对应改为
while (phoneCursor.getPosition() != phoneCursor.getCount()) {
ContactEntity contactentity =new ContactEntity();
contactentity.contacts_id = phoneCursor.getLong(0);
contactentity.contacts_phone_type = phoneCursor.getInt(1);
contactentity.contacts_phone_number = phoneCursor.getString(2)
.replace("-", "");
contactentity.contacts_display_name = phoneCursor.getString(3).replace("-", "");
contactentity.contacts_photo_id = phoneCursor.getString(4);
// spell name can
contactentity.spellName = PinYin.getInstance(this)
.getPinyinString(contactentity.contacts_display_name);
// Log.i(TAG, "contactentity.contact_id: " +
// contactentity.contact_id
// + " contactentity.contacts_phone_type: "
// + contactentity.contacts_phone_type
// + " contactentity.contacts_phone_number: "
// + contactentity.contacts_phone_number
// + "contactentity.contacts_display_name: "
// + contactentity.contacts_display_name
// + "contactentity.contact_phone_bmp: "
// + contactentity.contact_phone_bmp);
phoneCursor.moveToNext();
customArrayList.add(contactentity);
}
}
这样改变后只读一次数据库！
在1000联系人的情况下耗时打LOG得到不到2000毫秒！
其他优化方向！
1、查询数据库时把managedquerey第二参数projection写时！只查需要的列！不查询全部！
2、在contactentity.contact_id = phoneCursor
.getLong(phoneCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID));取值时直接用数组序号0，1，2代替！
3.图片等大数据量数据可放在getview方法中直接赋值而不通过对象传递！
