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由于这个模块内容较多,篇幅较长，请耐心阅读。

“我”的模块分为四个部分

一、修改密码

1、创建修改密码界面

在com.boxuegu.activity包中，创建一个java类，命名为ModifyPswActivity。在res/layout文件夹下创建布局文件，命名为activity_modify_psw。

2、修改密码界面代码——activity_modify_psw.xml

android:orientation="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@drawable/register_bg">

android:id="@+id/et_original_psw"

android:layout_width="fill_parent"

android:layout_height="48dp"

android:layout_gravity="center_horizontal"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="35dp"

android:background="@drawable/register_user_name_bg"

android:drawableLeft="@drawable/psw_icon"

android:drawablePadding="10dp"

android:gravity="center_vertical"

android:hint="请输入原始密码"

android:inputType="textPassword"

android:paddingLeft="8dp"

android:textColor="#000000"

android:textColorHint="#a3a3a3"

android:textSize="14sp"/>

android:id="@+id/et_new_psw"

android:layout_width="fill_parent"

android:layout_height="48dp"

android:layout_gravity="center_horizontal"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:background="@drawable/register_psw_bg"

android:drawableLeft="@drawable/psw_icon"

android:drawablePadding="10dp"

android:hint="请输入新密码"

android:inputType="textPassword"

android:paddingLeft="8dp"

android:singleLine="true"

android:textColor="#000000"

android:textColorHint="#a3a3a3"

android:textSize="14sp"/>

android:id="@+id/et_new_psw_again"

android:layout_width="fill_parent"

android:layout_height="48dp"

android:layout_gravity="center_horizontal"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:background="@drawable/register_psw_again_bg"

android:drawableLeft="@drawable/psw_icon"

android:drawablePadding="10dp"

android:hint="请再次输入新密码"

android:inputType="textPassword"

android:paddingLeft="8dp"

android:singleLine="true"

android:textColor="#000000"

android:textColorHint="#a3a3a3"

android:textSize="14sp"/>

android:id="@+id/btn_save"

android:layout_width="fill_parent"

android:layout_height="40dp"

android:layout_gravity="center_horizontal"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="15dp"

android:background="@drawable/register_selector"

android:text="保存"

android:textColor="@android:color/white"

android:textSize="18sp"/>

3、修改密码界面逻辑代码——ModifyPswActivity.java

package com.boxuegu.activity;

import android.content.Intent;

import android.content.SharedPreferences;

import android.content.pm.ActivityInfo;

import com.boxuegu.R;

import com.boxuegu.utils.AnalysisUtils;

import com.boxuegu.utils.MD5Utils;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.text.TextUtils;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class ModifyPswActivity extends AppCompatActivity {

private TextView tv_main_title;

private TextView tv_back;

private EditText et_original_psw, et_new_psw, et_new_psw_again;

private Button btn_save;

private String originalPsw, newPsw, newPswAgain;

private String userName;

@Override

protected void onCreate(Bundle savedIntanceState){

super.onCreate(savedIntanceState);

//设置界面布局

setContentView(R.layout.activity_modify_psw);

//设置界面为竖屏

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

init();

userName = AnalysisUtils.readLoginUserName(this);

}

//获取界面控件并处理相关控件的点击事件

private void init(){

tv_main_title = (TextView) findViewById(R.id.tv_main_title);

tv_main_title.setText("修改密码");

tv_back = (TextView) findViewById(R.id.tv_back);

et_original_psw = (EditText) findViewById(R.id.et_original_psw);

et_new_psw = (EditText) findViewById(R.id.et_new_psw);

et_new_psw_again = (EditText) findViewById(R.id.et_new_psw_again);

btn_save = (Button) findViewById(R.id.btn_save);

tv_back.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

ModifyPswActivity.this.finish();

}

});

//保存按钮的点击事件

btn_save.setOnClickListener(new View.OnClickListener(){

@Override

public void onClick(View v) {

getEditString();

if (TextUtils.isEmpty(originalPsw)) {

Toast.makeText(ModifyPswActivity.this, "请输入原始密码",

Toast.LENGTH_SHORT).show();

return;

}else if (!MD5Utils.md5(originalPsw).equals(readPsw())) {

Toast.makeText(ModifyPswActivity.this, "输入的密码与原始密码不一致",

Toast.LENGTH_SHORT).show();

return;

}else if (MD5Utils.md5(newPsw).equals(readPsw())) {

Toast.makeText(ModifyPswActivity.this, "输入的新密码与原始的密码不能一致",

Toast.LENGTH_SHORT).show();

return;

}else if (TextUtils.isEmpty(newPsw)) {

Toast.makeText(ModifyPswActivity.this, "请输入新密码",

Toast.LENGTH_SHORT).show();

return;

}else if (TextUtils.isEmpty(newPswAgain)) {

Toast.makeText(ModifyPswActivity.this, "请再次输入新密码",

Toast.LENGTH_SHORT).show();

return;

}else if (!newPsw.equals(newPswAgain)) {

Toast.makeText(ModifyPswActivity.this, "两次输入的新密码不一致",

Toast.LENGTH_SHORT).show();

return;

} else {

Toast.makeText(ModifyPswActivity.this,"新密码设置成功",

Toast.LENGTH_SHORT).show();

modifyPsw(newPsw);

Intent intent = new Intent(ModifyPswActivity.this, LoginActivity.class);

startActivity(intent);

SettingActivity.instance.finish(); //关闭设置界面

ModifyPswActivity.this.finish(); //关闭本界面

}

}

});

}

//获取控件上的字符串

private void getEditString(){

originalPsw = et_original_psw.getText().toString().trim();

newPsw = et_new_psw.getText().toString().trim();

newPswAgain=et_new_psw_again.getText().toString().trim();

}

//修改登录成功时保存在SharedPreferences中的密码

private void modifyPsw(String newPsw){

String md5Psw = MD5Utils.md5(newPsw);

SharedPreferences sp = getSharedPreferences("loginInfo",MODE_PRIVATE);

SharedPreferences.Editor editor = sp.edit(); //获取编辑器

editor.putString(userName,md5Psw); //保存新密码

editor.commit(); //提交修改

}

//从SharedPreferences中读取原始密码

private String readPsw(){

SharedPreferences sp = getSharedPreferences("loginInfo", MODE_PRIVATE);

String spPsw = sp.getString(userName, "");

return spPsw;

}

}

4、修改设置界面代码

在设置界面逻辑代码(SettingActivity.java)文件中找到init方法，在注释//跳转到修改密码的界面下方添加如下代码

Intent intent = new Intent(SettingActivity.this,ModifyPswActivity.class);

startActivity(intent);

二、设置密保和找回密码

1、创建设置密保和找回密码界面

在com.boxuegu.activity包中，创建一个java类，命名为FindPswActivity。在res/layout文件夹下创建布局文件，命名为activity_find_psw。将所需图片find_psw_icon.png导入drawable文件夹中。

2、创建设置密保和找回密码界面界面代码——activity_find_psw.xml

android:orientation="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@drawable/login_bg">

android:id="@+id/tv_user_name"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="35dp"

android:text="您的用户名是?"

android:textColor="@android:color/white"

android:textSize="18sp"

android:visibility="gone"/>

android:id="@+id/et_user_name"

android:layout_width="fill_parent"

android:layout_height="48dp"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="10dp"

android:background="@drawable/find_psw_icon"

android:hint="请输入您的用户名"

android:paddingLeft="8dp"

android:singleLine="true"

android:textColor="#000000"

android:textColorHint="#a3a3a3"

android:visibility="gone"/>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="15dp"

android:text="您的姓名是?"

android:textColor="@android:color/white"

android:textSize="18sp"/>

android:id="@+id/et_validate_name"

android:layout_width="fill_parent"

android:layout_height="48dp"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="10dp"

android:background="@drawable/find_psw_icon"

android:hint="请输入要验证的姓名"

android:paddingLeft="8dp"

android:singleLine="true"

android:textColor="#000000"

android:textColorHint="#a3a3a3"/>

android:id="@+id/tv_reset_psw"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="10dp"

android:gravity="center_vertical"

android:textColor="@android:color/white"

android:textSize="15sp"

android:visibility="gone"/>

android:id="@+id/btn_validate"

android:layout_width="fill_parent"

android:layout_height="40dp"

android:layout_gravity="center_horizontal"

android:layout_marginLeft="35dp"

android:layout_marginRight="35dp"

android:layout_marginTop="15dp"

android:background="@drawable/register_selector"

android:text="验证"

android:textColor="@android:color/white"

android:textSize="18sp"/>

3、设置密保和找回密码界面逻辑代码

package com.boxuegu.activity;

import android.content.SharedPreferences;

import android.content.pm.ActivityInfo;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.text.TextUtils;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

import com.boxuegu.R;

import com.boxuegu.utils.AnalysisUtils;

import com.boxuegu.utils.MD5Utils;

public class FindPswActivity extends AppCompatActivity {

//form为security时从设置密保界面跳转过来，否则就从登录界面跳转过来的

private String from;

private TextView tv_main_title;

private TextView tv_back;

private Button btn_validate;

private EditText et_validate_name;

private TextView tv_reset_psw;

private EditText et_user_name;

private TextView tv_user_name;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

//设置界面布局

setContentView(R.layout.activity_find_psw);

//设置界面为竖屏

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

from = getIntent().getStringExtra("from");

init();

}

//获取界面控件及处理相应控件的点击事件

private void init() {

tv_main_title = (TextView) findViewById(R.id.tv_main_title);

tv_back = (TextView) findViewById(R.id.tv_back);

et_validate_name = (EditText) findViewById(R.id.et_validate_name);

btn_validate = (Button) findViewById(R.id.btn_validate);

tv_reset_psw = (TextView) findViewById(R.id.tv_reset_psw);

et_user_name = (EditText) findViewById(R.id.et_user_name);

tv_user_name = (TextView) findViewById(R.id.tv_user_name);

if ("security".equals(from)){

tv_main_title.setText("设置密保");

}else{

tv_main_title.setText("找回密码");

tv_user_name.setVisibility(View.VISIBLE);

et_user_name.setVisibility(View.VISIBLE);

}

tv_back.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

FindPswActivity.this.finish();

}

});

btn_validate.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

String validateName = et_validate_name.getText().toString().trim();

if ("security".equals(from)){ //设置密保

if (TextUtils.isEmpty(validateName)){

Toast.makeText(FindPswActivity.this,"请输入要验证的姓名",

Toast.LENGTH_SHORT).show();

return;

}else{

Toast.makeText(FindPswActivity.this,"密保设置成功",

Toast.LENGTH_SHORT).show();

//保存密保到SharedPreferences中

saveSecurity(validateName);

FindPswActivity.this.finish();

}

}else{ //找回密码

String userName = et_user_name.getText().toString().trim();

String sp_security = readSecurity(userName);

if (TextUtils.isEmpty(userName)){

Toast.makeText(FindPswActivity.this,"请输入您的用户名",

Toast.LENGTH_SHORT).show();

return;

}else if (!isExistUserName(userName)){

Toast.makeText(FindPswActivity.this,"您输入的用户名不存在",

Toast.LENGTH_SHORT).show();

return;

}else if (TextUtils.isEmpty(validateName)){

Toast.makeText(FindPswActivity.this,"请输入要验证的姓名",

Toast.LENGTH_SHORT).show();

return;

}if (!validateName.equals(sp_security)){

Toast.makeText(FindPswActivity.this,"输入的密保不正确",

Toast.LENGTH_SHORT).show();

return;

}else{

//输入的密保正确，重新给用户设置一个密码：123456

tv_reset_psw.setVisibility(View.VISIBLE);

tv_reset_psw.setText("初始密码：123456");

savePsw(userName);

}

}

}

});

}

//保存初始化的密码

private void savePsw(String userName){

String md5Psw = MD5Utils.md5("123456"); //密码MD5加密

SharedPreferences sp = getSharedPreferences("loginInfo",MODE_PRIVATE);

SharedPreferences.Editor editor = sp.edit(); //获取编辑器

editor.putString(userName,md5Psw);

editor.commit(); //提交修改

}

private void saveSecurity(String validateName){

SharedPreferences sp = getSharedPreferences("loginInfo",MODE_PRIVATE);

SharedPreferences.Editor editor = sp.edit(); //获取编辑器

//存入对应账户的密保

editor.putString(AnalysisUtils.readLoginUserName(this)+"_security",validateName);

editor.commit(); //提交修改

}

//从SharedPreferences中读取密保

private String readSecurity(String userName){

SharedPreferences sp = getSharedPreferences("loginInfo",MODE_PRIVATE);

String security = sp.getString(userName+"_security","");

return security;

}

//从SharedPreferences中根据用户输入的用户名来判断是否有这个用户

private boolean isExistUserName(String userName){

boolean hasUserName = false;

SharedPreferences sp = getSharedPreferences("loginInfo",MODE_PRIVATE);

String spPsw = sp.getString(userName,"");

if (!TextUtils.isEmpty(spPsw)){

hasUserName=true;

}

return hasUserName;

}

}

4、修改代码

(1)、修改登录界面

到登录界面逻辑代码(LoginActivity.java)文件夹中找到init方法。在注释//跳转到找回密码界面下方添加如下代码

Intent intent = new Intent(LoginActivity.this, FindPswActivity.class);

startActivity(intent);

(2)、修改设置界面

到设置界面逻辑代码(SettingActivity.java)文件夹中找到init方法。在注释//跳转到设置密保界面下方添加如下代码

Intent intent = new Intent(SettingActivity.this,FindPswActivity.class);

intent.putExtra("from","security");

startActivity(intent);

三、运行效果

Android项目实战系列—基于博学谷 开源地址

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