Question

我想在ListView中显示所有用户收件箱短信。我使用一种方法首先获取所有短信（并保留在我的短信模型上），然后使用我的自定义BaseAdapter来显示。但它很慢，有时在弱电设备中导致＆＃34;没有响应＆＃34;。我猜是因为它获得了所有短信一次并且它不是懒惰的。有什么想法提高性能吗？

我的助手方法：

public List<SMS> getAllSMS() {
  List<SMS> unreadSms = new ArrayList<SMS>();
  Cursor cur = context.getContentResolver().query(SMS_INBOX, null, "", null, null);
  while (cur.moveToNext()) {
    SMS item = new SMS();
    item.setId(cur.getInt(0));
    item.setThreadId(cur.getInt(1));
    item.setNumber(cur.getString(cur.getColumnIndexOrThrow("address")));
    item.setName(getContactName(item.getNumber()));
    item.setDate(new Date(cur.getLong(cur.getColumnIndexOrThrow("date"))));
    item.setMessage(cur.getString(cur.getColumnIndexOrThrow("body")));
    unreadSms.add(item);
  }
  cur.close();

  return unreadSms;
}

我的适配器：

public class SMSAdapter extends BaseAdapter {
private Context context;
private List<SMS> items;
final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm", Locale.getDefault());

  public SMSAdapter(Context context, List<SMS> items) {
    this.context = context;
    this.items = items;
  }

  @Override public int getCount() {
    return items.size();
  }

  @Override public SMS getItem(int i) {
    return items.get(i);
  }

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

  @Override public View getView(int i, View view, ViewGroup viewGroup) {
    ViewHolder viewHolder;
    if (view == null) {
      view = LayoutInflater.from(context).inflate(R.layout.item_sms_list, viewGroup, false);
      viewHolder = new ViewHolder(view);
      view.setTag(viewHolder);
    } else {
      viewHolder = (ViewHolder) view.getTag();
    }

    final SMS item = getItem(i);

    Uri contactUri = null;
    try {
      contactUri = PhoneUtil.getPhotoUri(context, item.getNumber());
    } catch (Exception e) {
      e.printStackTrace();
    }
    Picasso.with(context)
        .load(contactUri)
        .placeholder(R.mipmap.ic_avatar)
        .into(viewHolder.imgAvatar);

    if (item.getName() != null && !item.getName().isEmpty()) {
      viewHolder.txtName.setText(item.getName());
    } else {
      viewHolder.txtName.setText(item.getNumber());
    }
    final PersianCalendar persianCalendar = new PersianCalendar();
    persianCalendar.setTimeInMillis(item.getDate().getTime());
    viewHolder.txtDate.setText(
        simpleDateFormat.format(item.getDate()) + " " + persianCalendar.getPersianShortDate());
    viewHolder.txtMessage.setText(item.getMessage());

    viewHolder.imgDelete.setOnClickListener(new View.OnClickListener() {
      @Override public void onClick(View view) {
        //items.remove(item);
        PhoneUtil.removeSMS(context, item.getId(), item.getThreadId());
        notifyDataSetChanged();
      }
    });

    return view;
  }

  private static class ViewHolder {
    public ImageView imgAvatar, imgDelete;
    public TextView txtName;
    public TextView txtDate;
    public TextView txtMessage;

    public ViewHolder(View viewItem) {
      final TypefaceProvider typefaceProvider = new TypefaceProvider(viewItem.getContext());
      imgAvatar = (ImageView) viewItem.findViewById(R.id.img_avatar);
      imgDelete = (ImageView) viewItem.findViewById(R.id.img_delete);
      txtName = (TextView) viewItem.findViewById(R.id.txt_name);
      txtDate = (TextView) viewItem.findViewById(R.id.txt_date);
      txtMessage = (TextView) viewItem.findViewById(R.id.txt_message);

      typefaceProvider.setTypeface(txtName);
      typefaceProvider.setTypeface(txtDate);
      typefaceProvider.setTypeface(txtMessage);
    }
  }
}

Answer 1

我更改了我的适配器并使用CursorAdapter而不是BaseAdapter并且在加载我的适配器之前没有获得所有SMS。性能提高，滞后减少。

希望这对某人有所帮助。

在ListView中显示SMS收件箱的有效方法

1 个答案: