Android开发笔记SQLite优化记住密码功能

本文实例为大家分享了android sqlite优化记住密码功能的具体代码，供大家参考，具体内容如下

package com.example.alimjan.hello_world;

/**
 * created by alimjan on 7/4/2017.
 */

  import com.example.alimjan.hello_world.bean.userinfo;
  import com.example.alimjan.hello_world.database.userdbhelper;
  import com.example.alimjan.hello_world.utils.dateutil;


  import android.app.alertdialog;
  import android.content.context;
  import android.content.dialoginterface;
  import android.content.intent;
  import android.os.bundle;
  import android.support.v7.app.appcompatactivity;
  import android.text.editable;
  import android.text.textwatcher;
  import android.util.log;
  import android.view.view;
  import android.view.view.onclicklistener;
  import android.view.view.onfocuschangelistener;
  import android.widget.adapterview;
  import android.widget.arrayadapter;
  import android.widget.button;
  import android.widget.checkbox;
  import android.widget.compoundbutton;
  import android.widget.edittext;
  import android.widget.radiobutton;
  import android.widget.radiogroup;
  import android.widget.spinner;
  import android.widget.textview;
  import android.widget.toast;
  import android.widget.adapterview.onitemselectedlistener;


public class class_4_2_3 extends appcompatactivity implements onclicklistener, onfocuschangelistener {

 private radiogroup rg_login;
 private radiobutton rb_password;
 private radiobutton rb_verifycode;
 private edittext et_phone;
 private textview tv_password;
 private edittext et_password;
 private button btn_forget;
 private checkbox ck_remember;
 private button btn_login;

 private int mrequestcode = 0;
 private int mtype = 0;
 private boolean bremember = false;
 private string mpassword = "111111";
 private string mverifycode;
 private userdbhelper mhelper;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.code_4_2_3);
  rg_login = (radiogroup) findviewbyid(r.id.rg_login);
  rb_password = (radiobutton) findviewbyid(r.id.rb_password);
  rb_verifycode = (radiobutton) findviewbyid(r.id.rb_verifycode);
  et_phone = (edittext) findviewbyid(r.id.et_phone);
  tv_password = (textview) findviewbyid(r.id.tv_password);
  et_password = (edittext) findviewbyid(r.id.et_password);
  btn_forget = (button) findviewbyid(r.id.btn_forget);
  ck_remember = (checkbox) findviewbyid(r.id.ck_remember);
  btn_login = (button) findviewbyid(r.id.btn_login);

  rg_login.setoncheckedchangelistener(new radiolistener());
  ck_remember.setoncheckedchangelistener(new checklistener());
  et_phone.addtextchangedlistener(new hidetextwatcher(et_phone));
  et_password.addtextchangedlistener(new hidetextwatcher(et_password));
  btn_forget.setonclicklistener(this);
  btn_login.setonclicklistener(this);
  et_password.setonfocuschangelistener(this);

  arrayadapter<string> typeadapter = new arrayadapter<string>(this,
    r.layout.item_select, typearray);
  typeadapter.setdropdownviewresource(r.layout.item_dropdown);
  spinner sp_type = (spinner) findviewbyid(r.id.sp_type);
  sp_type.setprompt("请选择用户类型");
  sp_type.setadapter(typeadapter);
  sp_type.setselection(mtype);
  sp_type.setonitemselectedlistener(new typeselectedlistener());
 }

 private class radiolistener implements radiogroup.oncheckedchangelistener {
  @override
  public void oncheckedchanged(radiogroup group, int checkedid) {
   if (checkedid == r.id.rb_password) {
    tv_password.settext("登录密码：");
    et_password.sethint("请输入密码");
    btn_forget.settext("忘记密码");
    ck_remember.setvisibility(view.visible);
   } else if (checkedid == r.id.rb_verifycode) {
    tv_password.settext("　验证码：");
    et_password.sethint("请输入验证码");
    btn_forget.settext("获取验证码");
    ck_remember.setvisibility(view.invisible);
   }
  }
 }

 private string[] typearray = {"个人用户", "公司用户"};
 class typeselectedlistener implements onitemselectedlistener {
  public void onitemselected(adapterview<?> arg0, view arg1, int arg2, long arg3) {
   mtype = arg2;
  }

  public void onnothingselected(adapterview<?> arg0) {
  }
 }

 private class checklistener implements compoundbutton.oncheckedchangelistener {
  @override
  public void oncheckedchanged(compoundbutton buttonview, boolean ischecked) {
   if (buttonview.getid() == r.id.ck_remember) {
    bremember = ischecked;
   }
  }
 }

 private class hidetextwatcher implements textwatcher {
  private edittext mview;
  private int mmaxlength;
  private charsequence mstr;

  public hidetextwatcher(edittext v) {
   super();
   mview = v;
   mmaxlength = viewutil.getmaxlength(v);
  }

  @override
  public void beforetextchanged(charsequence s, int start, int count, int after) {
  }

  @override
  public void ontextchanged(charsequence s, int start, int before, int count) {
   mstr = s;
  }

  @override
  public void aftertextchanged(editable s) {
   if (mstr == null || mstr.length() == 0)
    return;
   if ((mstr.length() == 11 && mmaxlength == 11) ||
     (mstr.length() == 6 && mmaxlength == 6)) {
    viewutil.hideoneinputmethod(class_4_2_3.this, mview);
   }
  }
 }

 @override
 public void onclick(view v) {
  string phone = et_phone.gettext().tostring();
  if (v.getid() == r.id.btn_forget) {
   if (phone==null || phone.length()<11) {
    toast.maketext(this, "请输入正确的手机号", toast.length_short).show();
    return;
   }
   if (rb_password.ischecked() == true) {
    intent intent = new intent(this, class_4_2_3_1.class);
    intent.putextra("phone", phone);
    startactivityforresult(intent, mrequestcode);
   } else if (rb_verifycode.ischecked() == true) {
    mverifycode = string.format("%06d", (int)(math.random()*1000000%1000000));
    alertdialog.builder builder = new alertdialog.builder(this);
    builder.settitle("请记住验证码");
    builder.setmessage("手机号"+phone+"，本次验证码是"+mverifycode+"，请输入验证码");
    builder.setpositivebutton("好的", null);
    alertdialog alert = builder.create();
    alert.show();
   }
  } else if (v.getid() == r.id.btn_login) {
   if (phone==null || phone.length()<11) {
    toast.maketext(this, "请输入正确的手机号", toast.length_short).show();
    return;
   }
   if (rb_password.ischecked() == true) {
    if (et_password.gettext().tostring().equals(mpassword) != true) {
     toast.maketext(this, "请输入正确的密码", toast.length_short).show();
     return;
    } else {
     loginsuccess();
    }
   } else if (rb_verifycode.ischecked() == true) {
    if (et_password.gettext().tostring().equals(mverifycode) != true) {
     toast.maketext(this, "请输入正确的验证码", toast.length_short).show();
     return;
    } else {
     loginsuccess();
    }
   }
  }
 }

 @override
 protected void onactivityresult(int requestcode, int resultcode, intent data) {
  if (requestcode == mrequestcode && data!=null) {
   //用户密码已改为新密码
   mpassword = data.getstringextra("new_password");
  }
 }

 //从修改密码页面返回登录页面，要清空密码的输入框
 @override
 protected void onrestart() {
  et_password.settext("");
  super.onrestart();
 }

 @override
 protected void onresume() {
  super.onresume();
  mhelper = userdbhelper.getinstance(this, 2);
  mhelper.openwritelink();
 }

 @override
 protected void onpause() {
  super.onpause();
  mhelper.closelink();
 }

 private void loginsuccess() {
  string desc = string.format("您的手机号码是%s，类型是%s。恭喜你通过登录验证，点击“确定”按钮返回上个页面",
    et_phone.gettext().tostring(), typearray[mtype]);
  alertdialog.builder builder = new alertdialog.builder(this);
  builder.settitle("登录成功");
  builder.setmessage(desc);
  builder.setpositivebutton("确定返回", new dialoginterface.onclicklistener() {
   @override
   public void onclick(dialoginterface dialog, int which) {
    finish();
   }
  });
  builder.setnegativebutton("我再看看", null);
  alertdialog alert = builder.create();
  alert.show();

  if (bremember) {
   userinfo info = new userinfo();
   info.phone = et_phone.gettext().tostring();
   info.password = et_password.gettext().tostring();
   info.update_time = dateutil.getcurdatestr("yyyy-mm-dd hh:mm:ss");
   mhelper.insert(info);
  }
 }

 //为什么光标进入密码框事件不选onclick？因为要点两下才会触发onclick动作（第一下是切换焦点动作）
 @override
 public void onfocuschange(view v, boolean hasfocus) {
  string phone = et_phone.gettext().tostring();
  if (v.getid() == r.id.et_password) {
   if (phone.length() > 0 && hasfocus == true) {
    userinfo info = mhelper.querybyphone(phone);
    if (info != null) {
     et_password.settext(info.password);
    }else{
     et_password.settext("");
    }
   }
  }
 }

 public static void starthome(context mcontext) {
  intent intent = new intent(mcontext, class_4_2_3.class);
  mcontext.startactivity(intent);
 }


}

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:focusable="true"
 android:focusableintouchmode="true"
 android:orientation="vertical"
 android:padding="5dp" >

 <radiogroup
  android:id="@+id/rg_login"
  android:layout_width="match_parent"
  android:layout_height="60dp"
  android:orientation="horizontal" >

  <radiobutton
   android:id="@+id/rb_password"
   android:layout_width="0dp"
   android:layout_height="match_parent"
   android:layout_weight="1"
   android:checked="true"
   android:gravity="left|center"
   android:text="密码登录"
   android:textcolor="@color/black"
   android:textsize="17sp" />

  <radiobutton
   android:id="@+id/rb_verifycode"
   android:layout_width="0dp"
   android:layout_height="match_parent"
   android:layout_weight="1"
   android:checked="false"
   android:gravity="left|center"
   android:text="验证码登录"
   android:textcolor="@color/black"
   android:textsize="17sp" />
 </radiogroup>

 <relativelayout
  android:layout_width="match_parent"
  android:layout_height="60dp" >

  <textview
   android:id="@+id/tv_type"
   android:layout_width="wrap_content"
   android:layout_height="match_parent"
   android:layout_alignparentleft="true"
   android:gravity="center"
   android:text="　　我是："
   android:textcolor="@color/black"
   android:textsize="17sp" />

  <spinner
   android:id="@+id/sp_type"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_torightof="@+id/tv_type"
   android:gravity="left|center"
   android:spinnermode="dialog" />
 </relativelayout>

 <relativelayout
  android:layout_width="match_parent"
  android:layout_height="60dp" >

  <textview
   android:id="@+id/tv_phone"
   android:layout_width="wrap_content"
   android:layout_height="match_parent"
   android:layout_alignparentleft="true"
   android:gravity="center"
   android:text="手机号码："
   android:textcolor="@color/black"
   android:textsize="17sp" />

  <edittext
   android:id="@+id/et_phone"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_marginbottom="5dp"
   android:layout_margintop="5dp"
   android:layout_torightof="@+id/tv_phone"
   android:background="@drawable/editext_selector"
   android:gravity="left|center"
   android:hint="请输入手机号码"
   android:inputtype="number"
   android:maxlength="11"
   android:textcolor="@color/black"
   android:textcolorhint="@color/grey"
   android:textcursordrawable="@drawable/text_cursor"
   android:textsize="17sp" />
 </relativelayout>

 <relativelayout
  android:layout_width="match_parent"
  android:layout_height="60dp" >

  <textview
   android:id="@+id/tv_password"
   android:layout_width="wrap_content"
   android:layout_height="match_parent"
   android:layout_alignparentleft="true"
   android:gravity="center"
   android:text="登录密码："
   android:textcolor="@color/black"
   android:textsize="17sp" />

  <framelayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_torightof="@+id/tv_password" >

   <edittext
    android:id="@+id/et_password"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginbottom="5dp"
    android:layout_margintop="5dp"
    android:background="@drawable/editext_selector"
    android:gravity="left|center"
    android:hint="请输入密码"
    android:inputtype="numberpassword"
    android:maxlength="6"
    android:textcolor="@color/black"
    android:textcolorhint="@color/grey"
    android:textcursordrawable="@drawable/text_cursor"
    android:textsize="17sp" />

   <button
    android:id="@+id/btn_forget"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="right"
    android:gravity="center"
    android:text="忘记密码"
    android:textcolor="@color/black"
    android:textsize="17sp" />
  </framelayout>
 </relativelayout>

 <checkbox
  android:id="@+id/ck_remember"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:button="@drawable/checkbox_selector"
  android:checked="false"
  android:padding="10dp"
  android:text="记住密码"
  android:textcolor="@color/black"
  android:textsize="17sp" />

 <button
  android:id="@+id/btn_login"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text="登录"
  android:textcolor="@color/black"
  android:textsize="22sp" />

</linearlayout>

package com.example.alimjan.hello_world;

/**
 * created by alimjan on 7/4/2017.
 */


  import android.app.activity;
  import android.app.alertdialog;
  import android.content.context;
  import android.content.intent;
  import android.os.bundle;
  import android.support.v7.app.appcompatactivity;
  import android.view.view;
  import android.view.view.onclicklistener;
  import android.widget.edittext;
  import android.widget.toast;

public class class_4_2_3_1 extends appcompatactivity implements onclicklistener {

 private edittext et_password_first;
 private edittext et_password_second;
 private edittext et_verifycode;
 private string mverifycode;
 private string mphone;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.code_4_2_3_1);
  et_password_first = (edittext) findviewbyid(r.id.et_password_first);
  et_password_second = (edittext) findviewbyid(r.id.et_password_second);
  et_verifycode = (edittext) findviewbyid(r.id.et_verifycode);
  findviewbyid(r.id.btn_verifycode).setonclicklistener(this);
  findviewbyid(r.id.btn_confirm).setonclicklistener(this);
  mphone = getintent().getstringextra("phone");
 }

 @override
 public void onclick(view v) {
  if (v.getid() == r.id.btn_verifycode) {
   if (mphone==null || mphone.length()<11) {
    toast.maketext(this, "请输入正确的手机号", toast.length_short).show();
    return;
   }
   mverifycode = string.format("%06d", (int) (math.random() * 1000000 % 1000000));
   alertdialog.builder builder = new alertdialog.builder(this);
   builder.settitle("请记住验证码");
   builder.setmessage("手机号"+mphone+"，本次验证码是"+mverifycode+"，请输入验证码");
   builder.setpositivebutton("好的", null);
   alertdialog alert = builder.create();
   alert.show();
  } else if (v.getid() == r.id.btn_confirm) {
   string password_first = et_password_first.gettext().tostring();
   string password_second = et_password_second.gettext().tostring();
   if (password_first==null || password_first.length()<6 ||
     password_second==null || password_second.length()<6) {
    toast.maketext(this, "请输入正确的新密码", toast.length_short).show();
    return;
   }
   if (password_first.equals(password_second) != true) {
    toast.maketext(this, "两次输入的新密码不一致", toast.length_short).show();
    return;
   }
   if (et_verifycode.gettext().tostring().equals(mverifycode) != true) {
    toast.maketext(this, "请输入正确的验证码", toast.length_short).show();
    return;
   } else {
    toast.maketext(this, "密码修改成功", toast.length_short).show();
    intent intent = new intent();
    intent.putextra("new_password", password_first);
    setresult(activity.result_ok, intent);
    finish();
   }
  }
 }

 public static void starthome(context mcontext) {
  intent intent = new intent(mcontext, class_4_2_3_1.class);
  mcontext.startactivity(intent);
 }

}

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:focusable="true"
 android:focusableintouchmode="true"
 android:orientation="vertical"
 android:padding="5dp" >

 <relativelayout
  android:layout_width="match_parent"
  android:layout_height="60dp" >

  <textview
   android:id="@+id/tv_password_first"
   android:layout_width="wrap_content"
   android:layout_height="match_parent"
   android:layout_alignparentleft="true"
   android:gravity="center"
   android:text="输入新密码："
   android:textcolor="@color/black"
   android:textsize="17sp" />

  <edittext
   android:id="@+id/et_password_first"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_marginbottom="5dp"
   android:layout_margintop="5dp"
   android:layout_torightof="@+id/tv_password_first"
   android:background="@drawable/editext_selector"
   android:gravity="left|center"
   android:hint="请输入新密码"
   android:inputtype="numberpassword"
   android:maxlength="11"
   android:textcolor="@color/black"
   android:textcolorhint="@color/grey"
   android:textcursordrawable="@drawable/text_cursor"
   android:textsize="17sp" />
 </relativelayout>

 <relativelayout
  android:layout_width="match_parent"
  android:layout_height="60dp" >

  <textview
   android:id="@+id/tv_password_second"
   android:layout_width="wrap_content"
   android:layout_height="match_parent"
   android:layout_alignparentleft="true"
   android:gravity="center"
   android:text="确认新密码："
   android:textcolor="@color/black"
   android:textsize="17sp" />

  <edittext
   android:id="@+id/et_password_second"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_marginbottom="5dp"
   android:layout_margintop="5dp"
   android:layout_torightof="@+id/tv_password_second"
   android:background="@drawable/editext_selector"
   android:gravity="left|center"
   android:hint="请再次输入新密码"
   android:inputtype="numberpassword"
   android:maxlength="11"
   android:textcolor="@color/black"
   android:textcolorhint="@color/grey"
   android:textcursordrawable="@drawable/text_cursor"
   android:textsize="17sp" />
 </relativelayout>

 <relativelayout
  android:layout_width="match_parent"
  android:layout_height="60dp" >

  <textview
   android:id="@+id/tv_verifycode"
   android:layout_width="wrap_content"
   android:layout_height="match_parent"
   android:layout_alignparentleft="true"
   android:gravity="center"
   android:text="　　验证码："
   android:textcolor="@color/black"
   android:textsize="17sp" />

  <framelayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:layout_torightof="@+id/tv_verifycode" >

   <edittext
    android:id="@+id/et_verifycode"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginbottom="5dp"
    android:layout_margintop="5dp"
    android:background="@drawable/editext_selector"
    android:gravity="left|center"
    android:hint="请输入验证码"
    android:inputtype="numberpassword"
    android:maxlength="6"
    android:textcolor="@color/black"
    android:textcolorhint="@color/grey"
    android:textcursordrawable="@drawable/text_cursor"
    android:textsize="17sp" />

   <button
    android:id="@+id/btn_verifycode"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="right"
    android:gravity="center"
    android:text="获取验证码"
    android:textcolor="@color/black"
    android:textsize="17sp" />
  </framelayout>
 </relativelayout>

 <button
  android:id="@+id/btn_confirm"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text="确定"
  android:textcolor="@color/black"
  android:textsize="22sp" />

</linearlayout>

当输入完手机号之后，点击密码编辑框时，从数据库查看内容，如果含有该号的密码则自动添加，如果没有则空。勾选记住密码选项之后，如果登陆成功则保存到数据库。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。