Android密码账号功能

来源：互联网发布：天猫销售数据编辑：程序博客网时间：2024/05/17 01:20

Android很多app上都有输入账号密码这一功能，此次实验app是通过SharedPreferences实现存储用户的账号密码功能。

布局文件的login_top.xml

<?xml version="1.0" encoding="utf-8"?>  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"      xmlns:app="http://schemas.android.com/apk/res-auto"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:padding="@dimen/activity_horizontal_margin"      android:background="@drawable/logintop_roundbg">      <EditText          android:id="@+id/etName"          android:layout_width="match_parent"          android:layout_height="wrap_content"          android:background="@android:drawable/edit_text"          android:drawableLeft="@drawable/icon_user"          android:ems="10"          android:hint="@string/etName"          android:drawablePadding="10dp"          >          <requestFocus />      </EditText>      <EditText          android:id="@+id/etPassword"          android:layout_width="match_parent"          android:layout_height="wrap_content"          android:layout_below="@+id/etName"          android:background="@android:drawable/edit_text"          android:drawableLeft="@drawable/icon_pass"          android:ems="10"          android:hint="@string/etPassword"          android:inputType="textPassword"          android:drawablePadding="10dp"          >      </EditText>      <LinearLayout          android:layout_width="match_parent"          android:layout_height="wrap_content"          android:layout_below="@+id/etPassword">          <CheckBox              android:text="记住密码"              android:layout_width="0dp"              android:layout_height="wrap_content"              android:id="@+id/cblsRememberPass"              android:textSize="20sp"              android:layout_weight="1" />          <Button              android:layout_width="0dp"              android:layout_height="wrap_content"              android:layout_weight="1"              android:background="@drawable/btn_select"              android:onClick="login"              android:text="@string/btnLogin" />      </LinearLayout>  </RelativeLayout>

activity_login.xml：

package cn.edu.bzu.case_login;  import android.content.Intent;  import android.content.SharedPreferences;  import android.support.v7.app.AppCompatActivity;  import android.os.Bundle;  import android.view.View;  import android.widget.CheckBox;  import android.widget.EditText;  import android.widget.Toast;  public class LoginActivity extends AppCompatActivity {      private EditText etName,etPassword;      private SharedPreferences sharedPreference;      private CheckBox cblsRememberPass;      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_login);          initViews();          sharedPreference=getSharedPreferences("rememberpassword",MODE_PRIVATE);          boolean isRemember=sharedPreference.getBoolean("rememberpassword",false);          if (isRemember){              String name=sharedPreference.getString("name","");              String password=sharedPreference.getString("password","");              etName.setText(name);              etPassword.setText(password);              cblsRememberPass.setChecked(true);          }      }      private void initViews() {          etName= (EditText) findViewById(R.id.etName);          etPassword= (EditText) findViewById(R.id.etPassword);          cblsRememberPass= (CheckBox) findViewById(R.id.cblsRememberPass);      }      public void login(View view){          String name=etName.getText().toString();          String password=etPassword.getText().toString();          if("admin".equals(name)&&"123456".equals(password)){              SharedPreferences.Editor editor=sharedPreference.edit();              if (cblsRememberPass.isChecked()){                  editor.putBoolean("rememberpassword",true);                  editor.putString("name",name);                  editor.putString("password",password);              }else {                  editor.clear();              }              editor.commit();              Intent intent=new Intent(this,MainActivity.class);              startActivity(intent);              finish();          }else {              Toast.makeText(this,"账号或者密码错误！",Toast.LENGTH_LONG).show();          }      }  }

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"      xmlns:tools="http://schemas.android.com/tools"      android:id="@+id/activity_main"      android:layout_width="match_parent"      android:layout_height="match_parent"      android:paddingBottom="@dimen/activity_vertical_margin"      android:paddingLeft="@dimen/activity_horizontal_margin"      android:paddingRight="@dimen/activity_horizontal_margin"      android:paddingTop="@dimen/activity_vertical_margin"      tools:context="cn.edu.bzu.case_login.MainActivity">      <TextView          android:text="Welcome you"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_centerVertical="true"          android:layout_centerHorizontal="true"          android:textSize="40sp"          android:layout_marginTop="263dp"          android:id="@+id/textView" />  </RelativeLayout>

LoginActivity部分的代码：

package cn.edu.bzu.case_login;  import android.content.Intent;  import android.content.SharedPreferences;  import android.support.v7.app.AppCompatActivity;  import android.os.Bundle;  import android.view.View;  import android.widget.CheckBox;  import android.widget.EditText;  import android.widget.Toast;  public class LoginActivity extends AppCompatActivity {      private EditText etName,etPassword;      private SharedPreferences sharedPreference;      private CheckBox cblsRememberPass;      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_login);          initViews();          sharedPreference=getSharedPreferences("rememberpassword",MODE_PRIVATE);          boolean isRemember=sharedPreference.getBoolean("rememberpassword",false);          if (isRemember){              String name=sharedPreference.getString("name","");              String password=sharedPreference.getString("password","");              etName.setText(name);              etPassword.setText(password);              cblsRememberPass.setChecked(true);          }      }      private void initViews() {          etName= (EditText) findViewById(R.id.etName);          etPassword= (EditText) findViewById(R.id.etPassword);          cblsRememberPass= (CheckBox) findViewById(R.id.cblsRememberPass);      }      public void login(View view){          String name=etName.getText().toString();          String password=etPassword.getText().toString();          if("admin".equals(name)&&"123456".equals(password)){              SharedPreferences.Editor editor=sharedPreference.edit();              if (cblsRememberPass.isChecked()){                  editor.putBoolean("rememberpassword",true);                  editor.putString("name",name);                  editor.putString("password",password);              }else {                  editor.clear();              }              editor.commit();              Intent intent=new Intent(this,MainActivity.class);              startActivity(intent);              finish();          }else {              Toast.makeText(this,"账号或者密码错误！",Toast.LENGTH_LONG).show();          }      }  }

MainActivity部分的代码：

package cn.edu.bzu.case_login;  import android.support.v7.app.AppCompatActivity;  import android.os.Bundle;  public class MainActivity extends AppCompatActivity {      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);      }  }

以下是效果图：

这里写图片描述

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