Android AsyncTask用法巧用实例代码

android asynctask

联系人导入

 new asynctask<arraylist<contactinfo>, integer, arraylist<contactinfo>>() {
                    @override
                    protected void onpreexecute() {
                      super.onpreexecute();
                      if (importingdialog != null)
                        importingdialog.show();
                    }

                    @override
                    protected arraylist<contactinfo> doinbackground(arraylist<contactinfo>... params) {

                      int importcount = 0;
                      for (contactinfo member : importlistcontact) {
                        if (member.ischeck()) {
                          importcount++;

                          contactinserthelper.insertsyscontacts2xphone(member);
                          params[0].add(member);

                          publishprogress(importcount);
                        }
                      }
                      return params[0];
                    }

                    @override
                    protected void onprogressupdate(integer... values) {
                      importingdialog.notifybyteprogress(count, values[0]);
                    }

                    @override
                    protected void onpostexecute(arraylist<contactinfo> contactinfos) {
                      final arraylist<string> names = new arraylist<string>();
                      final arraylist<string> numbers = new arraylist<string>();
                      for (contactinfo contactinfo : contactinfos) {
                        for (int i = 0; i < contactinfo.getphones().size(); i++) {
                          numbers.add(contactinfo.getphones().get(i).replaceall(" ", ""));
                          names.add(contactinfo.getname());
                        }
                      }

                      intent intent = new intent("com.godinsec.importcomplete");
                      intent.putstringarraylistextra("numbers", numbers);
                      intent.putstringarraylistextra("names", names);
                      importcontactactivity.this.sendbroadcast(intent);


                      intent updateintent = new intent("com.godinsec.update.syscontacts");
                      importcontactactivity.this.sendbroadcast(updateintent);

                      handler.sendemptymessage(0);
                    }
                  }.execute(new arraylist<contactinfo>());

联系人删除

new launchercontactdeleasynctask(mactivity, contactinfosdeles).execute(new arraylist<string>());

package com.godinsec.contacts.core;
import android.content.context;
import android.content.intent;
import android.os.asynctask;
import com.godinsec.contacts.r;
import com.godinsec.contacts.contacthelper.contactinserthelper;
import com.godinsec.contacts.db.applicationsqlmanger;
import com.godinsec.contacts.dialog.importingdialog;
import com.godinsec.contacts.model.contactinfo;
import java.util.arraylist;
/**
 * created by safly on 2016/9/23.
 */
public class launchercontactdeleasynctask extends asynctask<arraylist<string>, integer, arraylist<string>> {
  private context mcontext = null;
  private arraylist<contactinfo> deletelistcontacts;//总数
  private contactinserthelper contactinserthelper;

  final arraylist<string> delecontactphones = new arraylist<>();

  private importingdialog importingdialog = null;
  int delecount = 0;
  int deleallcount = 0;

  public launchercontactdeleasynctask(context mcontext, arraylist<contactinfo> contactinfos) {
    this.mcontext = mcontext;
    this.deletelistcontacts = contactinfos;
    contactinserthelper = new contactinserthelper(mcontext);
  }


  @override
  protected void onpreexecute() {
    super.onpreexecute();
    importingdialog = new importingdialog(mcontext,mcontext.getresources().getstring(r.string.gsettings_dele_contacts));
    importingdialog.setcanceledontouchoutside(false);

    if (importingdialog != null){
      importingdialog.show();
    }

    for (contactinfo member : deletelistcontacts) {
      if (member.ischeck()) {
        deleallcount++;
      }
    }
  }

  @override
  protected arraylist<string> doinbackground(arraylist<string>... params) {
    for (contactinfo member : deletelistcontacts) {
      if (member.ischeck()) {
        //删除联系人
        long contactserverflag = applicationsqlmanger.getinstance().getcontactserverflagbylaunchercontact(mcontext, member);

        params[0].add(string.valueof(contactserverflag));
        delecount += contactinserthelper.delete(mcontext, member);

        //传递要删除的号码
        for (string phone : member.getphones()) {
          if (delecontactphones != null) {
            delecontactphones.add(phone);
          }
        }

        publishprogress(delecount);
      }
    }
    return params[0];
  }

  @override
  protected void onprogressupdate(integer... values) {
    importingdialog.notifybyteprogress(deleallcount, values[0]);
  }

  @override
  protected void onpostexecute(arraylist<string> contactids) {
    super.onpostexecute(contactids);

    if (importingdialog.isshowing()) {
      importingdialog.dismiss();
    }

    intent updateintent = new intent("com.godinsec.update.syscontacts");
    mcontext.sendbroadcast(updateintent);

    intent intent = new intent("com.godinsec.delcontact");
    intent.putstringarraylistextra("numbers", delecontactphones);
    mcontext.sendbroadcast(intent);
  }
}

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！