【移动应用开发技术】Android中怎么使用SQLite实现记住密码功能

【移动应用开发技术】Android中怎么使用SQLite实现记住密码功能

这期内容当中在下将会给大家带来有关Android中怎么使用SQLite实现记住密码功能，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。具体内容如下package

com.example.alimjan.hello_world;

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="/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="/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_sec