Android密码账号功能
16lz
2021-01-23
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:
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