将联系人提取到回收者视图太慢了

Question

我正在向回收者视图提取联系人...现在以下代码效果很好但是在获取联系人时需要花费太多时间....所以如果有任何方法可以快速获取联系人，请指导我

public class AllContactsAdapter extends RecyclerView.Adapter<AllContactsAdapter.ContactViewHolder>{

private List<ContactVO> contactVOList;
private Context mContext;
public AllContactsAdapter(List<ContactVO> contactVOList, Context mContext){
    this.contactVOList = contactVOList;
    this.mContext = mContext;
}

@Override
public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(mContext).inflate(R.layout.single_contact_view, null);
    ContactViewHolder contactViewHolder = new ContactViewHolder(view);
    return contactViewHolder;
}

@Override
public void onBindViewHolder(ContactViewHolder holder, int position) {
    ContactVO contactVO = contactVOList.get(position);

        holder.tvContactName.setText(contactVO.getContactName());
        holder.tvPhoneNumber.setText(contactVO.getContactNumber());


}

@Override
public int getItemCount() {
    return contactVOList.size();
}

public static class ContactViewHolder extends RecyclerView.ViewHolder{

    ImageView ivContactImage;
    TextView tvContactName;
    TextView tvPhoneNumber;

    public ContactViewHolder(View itemView) {
        super(itemView);
        ivContactImage = (ImageView) itemView.findViewById(R.id.ivContactImage);
        tvContactName = (TextView) itemView.findViewById(R.id.tvContactName);
        tvPhoneNumber = (TextView) itemView.findViewById(R.id.tvPhoneNumber);
    }
}
}

这是我提取联系人的地方......

   private void getAllContacts() {
    List<ContactVO> contactVOList = new ArrayList();
    ContactVO contactVO;

    ContentResolver contentResolver = getContentResolver();
    Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC");
    if (cursor.getCount() > 0) {
        while (cursor.moveToNext()) {

            int hasPhoneNumber = Integer.parseInt(cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER)));
            if (hasPhoneNumber > 0) {
                String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
                String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));

                contactVO = new ContactVO();
                contactVO.setContactName(name);

                Cursor phoneCursor = contentResolver.query(
                        ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                        null,
                        ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
                        new String[]{id},
                        null);
                if (phoneCursor.moveToNext()) {
                    String phoneNumber = phoneCursor.getString(phoneCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                    contactVO.setContactNumber(phoneNumber);
                }

                phoneCursor.close();

                Cursor emailCursor = contentResolver.query(
                        ContactsContract.CommonDataKinds.Email.CONTENT_URI,
                        null,
                        ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = ?",
                        new String[]{id}, null);
                while (emailCursor.moveToNext()) {
                    String emailId = emailCursor.getString(emailCursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
                }
                contactVOList.add(contactVO);
            }
        }

        AllContactsAdapter contactAdapter = new AllContactsAdapter(contactVOList, getApplicationContext());
        rvContacts.setLayoutManager(new LinearLayoutManager(this));
        rvContacts.setAdapter(contactAdapter);
    }

Answer 1

此代码可以帮助您

我检索所有联系人并将该联系人绑定到Listview（在您的情况下也可以使用RecyclerView）

ContactsActivity

public class ContactsActivity extends AppCompatActivity {
String[] mProjection;
Cursor cursor;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_contacts);

    mProjection = new String[] {
            ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
            ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
            ContactsContract.CommonDataKinds.Photo.PHOTO
    };

    cursor = getActivity().getContentResolver().query(
           ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
           mProjection,
           null,
           null,
           ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " COLLATE LOCALIZED ASC"
   );

   ContactListAdapter adapter = new ContactListAdapter(getContext(),cursor);

    final ListView listView = (ListView) findViewById(R.id.lvContactDisplay);
    listView.setAdapter(adapter);
}
}

ContactListAdapter

public class ContactListAdapter extends BaseAdapter {

private Context mContext;
private Cursor mCursor;
String[] mProjection;

// State of the row that needs to show separator
private static final int SECTIONED_STATE = 1;

// State of the row that need not show separator
private static final int REGULAR_STATE = 2;

// Cache row states based on positions
private int[] mRowStates;

public ContactListAdapter(Context context, Cursor cursor) {
    mContext = context;
    mCursor = cursor;
    mRowStates = new int[getCount()];
}
@Override
public int getCount() {
    return mCursor.getCount();
}

@Override
public Object getItem(int position) {
    return null;
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View view;
    boolean showSeparator = false;
    mProjection = new String[] {
            ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
            ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
            ContactsContract.CommonDataKinds.Photo.PHOTO
    };

    mCursor.moveToPosition(position);
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inflater.inflate(R.layout.row_display_contacts, null);
    }
    else {
        view = convertView;
    }
    ImageView profileUser = (ImageView) view.findViewById(R.id.ivProfileUser);
    TextView contactNameView = (TextView) view.findViewById(R.id.tvUserContactName);
    TextView contactId = (TextView) view.findViewById(R.id.tvUserContactId);
    contactId.setVisibility(View.GONE);
    String id = mCursor.getString(mCursor.getColumnIndex(mProjection[0]));
    String name = mCursor.getString( mCursor.getColumnIndex(mProjection[1]));
    int photo = mCursor.getInt(mCursor.getColumnIndex(mProjection[2]));

    contactNameView.setText( name );
    contactId.setText(id);

    if (photo == 0){
        profileUser.setImageResource(R.drawable.ic_profile_user);
    }
    else {
        profileUser.setImageResource(photo);
    }

    switch (mRowStates[position]) {

        case SECTIONED_STATE:
            showSeparator = true;
            break;

        case REGULAR_STATE:
            showSeparator = false;
            break;

        default:

            if (position == 0) {
                showSeparator = true;
            }
            else {
                mCursor.moveToPosition(position - 1);

                String previousName = mCursor.getString(mCursor.getColumnIndex(mProjection[1]));
                char[] previousNameArray = previousName.toCharArray();
                char[] nameArray = name.toCharArray();

                if (nameArray[0] != previousNameArray[0]) {
                    showSeparator = true;
                }
                mCursor.moveToPosition(position);
            }

            // Cache it
            mRowStates[position] = showSeparator ? SECTIONED_STATE : REGULAR_STATE;

            break;
    }
    TextView separatorView = (TextView) view.findViewById(R.id.tvContactAlphabetOrder);
    if (showSeparator) {
        separatorView.setText(name.toCharArray(), 0, 1);
        separatorView.setVisibility(View.VISIBLE);
    }
    else {
        view.findViewById(R.id.tvContactAlphabetOrder).setVisibility(View.GONE);
    }
    return view;
}
}

row_display_contacts.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:id="@+id/tvContactAlphabetOrder"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="abc"
    android:padding="2dp"
    android:background="#C8C8C8"
    android:textSize="@dimen/font_size"
    android:textStyle="bold"/>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:layout_gravity="center_horizontal">

    <ImageView
        android:id="@+id/ivProfileUser"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:scaleType="fitXY"
        android:layout_gravity="center"
        android:src="@drawable/ic_profile_user"/>

    <TextView
        android:id="@+id/tvUserContactName"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text="abc"
        android:layout_gravity="center"
        android:padding="2dp"
        android:textColor="@color/navigationBarColor"
        android:layout_marginLeft="5dp"
        android:textSize="@dimen/font_size" />

    <TextView
        android:id="@+id/tvUserContactId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="abcdsfs"
        android:layout_gravity="center"
        android:padding="2dp"
        android:textColor="@color/navigationBarColor"
        android:layout_marginLeft="5dp"
        android:textSize="@dimen/font_size" />

</LinearLayout>

</LinearLayout>

您可以像这样获得所有联系人：