Android实现记住密码小功能

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".v.mainactivity">

    <textview
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="登录"
        android:textsize="20sp"
        android:textcolor="#ffeb3b"
        android:gravity="center"
        android:padding="10dp"
        android:background="#8bc34a"
        >
    </textview>


    <linearlayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_margintop="50dp"
        >

      <textview
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="邮箱:"
          android:textcolor="#03a9f4"
          android:textsize="15sp"
          android:textstyle="italic"
          android:layout_marginleft="30dp"
          android:padding="10dp"
          >
      </textview>

      <edittext
          android:id="@+id/youxiang"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:hint="请输入邮箱"
          android:paddingleft="10dp"
          android:textcolorhint="#ff5722"
          android:textstyle="italic"
          android:layout_marginright="40dp"
          >
      </edittext>


    </linearlayout>


  <linearlayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal"
      android:layout_margintop="10dp"
      >

    <textview
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="密码:"
        android:textcolor="#03a9f4"
        android:textsize="15sp"
        android:textstyle="italic"
        android:layout_marginleft="30dp"
        android:padding="10dp"
        >
    </textview>

    <edittext
        android:id="@+id/mima"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:hint="请输入密码"
        android:paddingleft="10dp"
        android:textcolorhint="#ff5722"
        android:textstyle="italic"
        >
    </edittext>

    <imageview
        android:id="@+id/can"
        android:layout_width="20dp"
        android:layout_height="match_parent"
        android:src="@mipmap/login_icon_hide_password_n"
        android:layout_marginright="20dp"
        >
    </imageview>
  </linearlayout>


  <checkbox
      android:id="@+id/ji"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="记住密码"
      android:textcolor="#ff5722"
      android:layout_marginleft="40dp"
      android:layout_margintop="15dp"
      >
  </checkbox>


  <button
      android:id="@+id/deng"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:text="登录"
      android:textcolor="#ff5722"
      android:background="#03a9f4"
      android:textstyle="bold"
      android:textsize="15sp"
      android:layout_margin="30dp"
      >
  </button>
</linearlayout>

package com.wd.health.v;

import android.content.intent;
import android.content.sharedpreferences;
import android.os.bundle;
import android.text.method.hidereturnstransformationmethod;
import android.text.method.passwordtransformationmethod;
import android.view.view;
import android.widget.button;
import android.widget.checkbox;
import android.widget.edittext;
import android.widget.imageview;
import android.widget.toast;

import com.wd.health.r;
import com.wd.health.base.baseactivity;
import com.wd.health.bean.loginbean;
import com.wd.health.contract.ilogincontract;
import com.wd.health.net.rsacoder;
import com.wd.health.p.loginpresenter;

import butterknife.bindview;
import butterknife.butterknife;

public class mainactivity extends baseactivity<loginpresenter> implements ilogincontract.iloginview {

    @bindview(r.id.can)
    imageview can;
    @bindview(r.id.ji)
    checkbox ji;
    @bindview(r.id.deng)
    button deng;
    @bindview(r.id.youxiang)
    edittext youxiang;
    @bindview(r.id.mima)
    edittext mima;
    boolean sb=true;
    private sharedpreferences user;
    private sharedpreferences.editor edit;

    @override
    protected int initview() {
        return r.layout.activity_main;
    }

    @override
    protected loginpresenter creatpresenter() {
        return new loginpresenter();
    }

    @override
    protected void loaddata() {
        butterknife.bind(this);
        //默认是隐藏
        mima.settransformationmethod(passwordtransformationmethod.getinstance());
        //点击小眼睛
        can.setonclicklistener(new view.onclicklistener() {
            @override
            public void onclick(view v) {
                if (sb){
                    can.setimageresource(r.mipmap.login_icon_show_password);
                    mima.settransformationmethod(hidereturnstransformationmethod.getinstance());    //显示
                    sb=false;
                }else {
                    can.setimageresource(r.mipmap.login_icon_hide_password_n);
                    mima.settransformationmethod(passwordtransformationmethod.getinstance());   //隐藏
                    sb=true;
                }
            }
        });
        //记住密码
        user = getsharedpreferences("user", mode_private);
        boolean isremenber = user.getboolean("remember_password", false);
        if(isremenber){
            youxiang.settext(user.getstring("phone",""));
            mima.settext(user.getstring("password",""));
            ji.setchecked(true);
        }

        //点击登录
        deng.setonclicklistener(new view.onclicklistener() {
            @override
            public void onclick(view v) {
                string s1 = youxiang.gettext().tostring();      //获取输入框邮箱
                string s2 = mima.gettext().tostring();          //获取输入框密码
                string a="";        //存放加密的密码
                try {
                    a = rsacoder.encryptbypublickey(s2);        //加密后的密码
                } catch (exception e) {
                    e.printstacktrace();
                }
                if (s1.equals("")){         //如果邮箱为空则吐司
                    toast.maketext(mainactivity.this, "请输入邮箱", toast.length_short).show();
                }else if (s2.equals("")){   //如果密码为空则吐司
                    toast.maketext(mainactivity.this, "请输入密码", toast.length_short).show();
                }else {
                    //这是mvp调用的p层
                    mpresenter.showdengpresenter(s1,a);     //s1是邮箱  a是加密的密码
                    //记住密码
                    edit = user.edit();
                    if(ji.ischecked()){
                        edit.putboolean("remember_password",true);
                        edit.putstring("phone",s1);        //没有加密的邮箱
                        edit.putstring("password",s2);      //没有加密的密码
                    }else{
                        edit.clear();
                    }
                    edit.apply();
                }

            }
        });

    }

    @override
    public void showdengview(loginbean loginbean) {
        toast.maketext(this, loginbean.getmessage(), toast.length_short).show();
        if (loginbean.getstatus().equals("0000")){
            user.edit().putstring("userid",string.valueof(loginbean.getresult().getuserid()))
                    .putstring("sessionid",loginbean.getresult().getsessionid())
                    .putstring("nickname",loginbean.getresult().getnickname())
                    .putstring("username",loginbean.getresult().getusername())
                    .putstring("jiguangpwd",loginbean.getresult().getjiguangpwd())
                    .putstring("headpic",loginbean.getresult().getheadpic())
                    .putstring("sex",string.valueof(loginbean.getresult().getsex()))
                    .putstring("age",string.valueof(loginbean.getresult().getage()))
                    .putstring("height",string.valueof(loginbean.getresult().getheight()))
                    .putstring("weight",string.valueof(loginbean.getresult().getweight()))
                    .putstring("email",string.valueof(loginbean.getresult().getemail()))
                    .putstring("whetherbingwechat",string.valueof(loginbean.getresult().getwhetherbingwechat()))
                    .putstring("invitationcode",string.valueof(loginbean.getresult().getinvitationcode()))
                    .putstring("faceflag",string.valueof(loginbean.getresult().getfaceflag()))
                    .commit();
            //成功后跳转到首页
            intent intent = new intent(mainactivity.this,homeactivity.class);
            startactivity(intent);
            finish();
        }

    }
}