用户登录记录密码

来源：互联网发布：布谷鸟软件编辑：程序博客网时间：2024/05/18 00:07

AndroidManifest.Java

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="cn.edu.bzu.case_login">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".LoginActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".MainActivity"></activity>    </application></manifest>

LoginActivity

package cn.edu.bzu.case_login;import android.content.Context;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;    private EditText etPassword;    private SharedPreferences sharedPreferences ;    private CheckBox cbIsRemeberPass;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_login);        initViews();       sharedPreferences= getSharedPreferences("rememberpassword", Context.MODE_PRIVATE);       boolean isRemeber= sharedPreferences.getBoolean("rememberpassword",false);        if (isRemeber){            String name=sharedPreferences.getString("name","");            String password=sharedPreferences.getString("password","");            etName.setText(name);            etPassword.setText(password);            cbIsRemeberPass.setChecked(true);        }    }    private void initViews() {        etName=(EditText) findViewById(R.id.etName);        etPassword=(EditText)findViewById(R.id.etPassword);        cbIsRemeberPass=(CheckBox)findViewById(R.id.cbIsRememberPass);    }    public void login(View view){        String name=etName.getText().toString();        String password=etPassword.getText().toString();        if ("admain".equals(name)&&"123456".equals(password)){            SharedPreferences.Editor editor=sharedPreferences.edit();            if (cbIsRemeberPass.isChecked()){                editor.putBoolean("remeberpassword",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,"账号或密码有误",Toast.LENGTH_LONG.show());        }    }}

MainActivity

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);    }}

activity_login.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:id="@+id/activity_login"    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"    android:background="@drawable/loginbg"    tools:context="cn.edu.bzu.case_login.LoginActivity">    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        app:srcCompat="@drawable/deer"        android:layout_alignParentBottom="true"        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true"        android:layout_marginBottom="20dp"        android:id="@+id/imageView" /></RelativeLayout>
activity_main.xml

<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_alignParentTop="true"        android:layout_centerHorizontal="true"        android:textSize="40sp"        android:layout_marginTop="263dp"        android:id="@+id/textView" /></RelativeLayout>
login_top.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    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:drawablePadding="10dp"        android:ems="10"        android:hint="@string/etName">        <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:drawablePadding="10dp"        android:ems="10"        android:hint="@string/etPass"        android:inputType="textPassword">        <requestFocus />    </EditText>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_below="@id/etPassword">        <Button            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:background="@drawable/btn_select"            android:text="@string/btnLogin" />        <Button            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:layout_marginLeft="10dp"            android:background="@drawable/btn_select"            android:text="@string/btnRegister" />    </LinearLayout></RelativeLayout>
结果运行图：

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