11.12周安卓作业

1

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity"

    android:orientation="vertical">

 

    <EditText

        android:id="@+id/et1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="123" />

    <Button

        android:id="@+id/bt1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="写入"/>

    <EditText

        android:id="@+id/et2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="123" />

    <Button

        android:id="@+id/bt2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="读取"/>

 

 

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity"

    android:orientation="vertical">

 

    <EditText

        android:id="@+id/et_in"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="10dp"

        android:hint="输入你想要写入的内容"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        app:layout_constraintVertical_bias="0.042" />

 

    <Button

        android:id="@+id/b1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_margin="10dp"

        android:layout_marginTop="120dp"

        android:onClick="click1"

        android:text="写入"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintHorizontal_bias="0.365"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        app:layout_constraintVertical_bias="0.154" />

 

    <EditText

        android:id="@+id/et_out"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_margin="10dp"

        android:hint="显示读取的内容"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        app:layout_constraintVertical_bias="0.421" />

 

    <Button

        android:id="@+id/b2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_margin="10dp"

        android:onClick="click2"

        android:text="读取"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintHorizontal_bias="0.346"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        app:layout_constraintVertical_bias="0.541" />

 

 

</androidx.constraintlayout.widget.ConstraintLayout>

 

 

 

2.

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity"

    android:orientation="vertical">

 

 

    <TextView

        android:id="@+id/tv1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginBottom="15dp"

        android:background="#27D52C"

        android:padding="5dp"

        android:text="用户登录"

        android:textColor="#FFFFFF"

        android:textSize="25sp" />

 

    <LinearLayout

        android:id="@+id/ll_1"

        android:layout_width="match_parent"

        android:layout_height="50dp"

        android:layout_margin="10dp"

        android:orientation="horizontal">

 

        <TextView

            android:id="@+id/tv2"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_margin="10dp"

            android:text="账号"

            android:textColor="#000000"

            android:textSize="18sp" />

 

        <EditText

            android:id="@+id/et1"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginTop="10dp"

            android:hint="请输入账号" />

 

    </LinearLayout>

 

    <LinearLayout

        android:id="@+id/ll_2"

        android:layout_width="match_parent"

        android:layout_height="50dp"

        android:layout_margin="10dp"

        android:orientation="horizontal">

 

        <TextView

            android:id="@+id/tv3"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_margin="10dp"

            android:text="密码"

            android:textColor="#000000"

            android:textSize="18sp" />

 

        <EditText

            android:id="@+id/et2"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginTop="10dp"

            android:hint="请输入密码" />

 

    </LinearLayout>

 

    <LinearLayout

        android:id="@+id/ll_3"

        android:layout_width="match_parent"

        android:layout_height="80dp"

        android:layout_marginLeft="25dp"

        android:orientation="horizontal">

 

        <CheckBox

            android:id="@+id/cb1"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_margin="10dp"

            android:text="记住密码" />

 

        <CheckBox

            android:id="@+id/cb2"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_margin="10dp"

            android:text="自动登录" />

 

        <Button

            android:id="@+id/btn1"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_margin="10dp"

            android:text="登录" />

 

    </LinearLayout>

 

 

</LinearLayout>

package com.example.myapplication;

import java.util.Map;

 

import android.os.Bundle;

import android.app.Activity;

import android.content.DialogInterface.OnClickListener;

import android.content.SharedPreferences.Editor;

import android.text.TextUtils;

import android.view.Menu;

import android.view.View;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.EditText;

import android.widget.Toast;

 

import androidx.annotation.CheckResult;

 

public class MainActivity extends Activity implements android.view.View.OnClickListener , CompoundButton.OnCheckedChangeListener {

 

    private EditText et_account;

    private EditText et_password;

    private Button btn_login;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        initView();

        Map<String, String> userInfo=qq.getUserInfo(this);

        if(userInfo!=null){

            et_account.setText(userInfo.get("account"));

            et_password.setText(userInfo.get("password"));

        }

    }

    private void initView() {

        // TODO Auto-generated method stub

        et_account=(EditText)findViewById(R.id.user);

        et_password=(EditText)findViewById(R.id.password);

        btn_login=(Button)findViewById(R.id.b1);

        btn_login.setOnClickListener(this);

        CheckBox cb1=findViewById(R.id.cb1);

        cb1.setOnCheckedChangeListener(this);

        CheckBox cb2=findViewById(R.id.cb2);

        cb2.setOnCheckedChangeListener(this);

    }

    @Override

    public void onClick(View v) {

        // TODO Auto-generated method stub

        switch(v.getId()){

            case R.id.b1:

                String account=et_account.getText().toString().trim();

                String password=et_password.getText().toString();

                if(TextUtils.isEmpty(account)){

                    Toast.makeText(this, "请输入账号", Toast.LENGTH_SHORT).show();

                    return;

                }

                if(TextUtils.isEmpty(password)){

                    Toast.makeText(this, "请输入密码", Toast.LENGTH_SHORT).show();

                    return;

                }

                Toast.makeText(this, "登录成功", Toast.LENGTH_SHORT).show();

 

        }

 

    }

 

    @Override

    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

        switch (compoundButton.getId()){

            case R.id.cb1 :

                String account=et_account.getText().toString().trim();

                String password=et_password.getText().toString();

                boolean isSaveSuccess=qq.saveUserInfo(this, account, password);

                if(isSaveSuccess&&b){

                    Toast.makeText(this, "保存成功", Toast.LENGTH_SHORT).show();

                }else{

                    Toast.makeText(this, "保存失败", Toast.LENGTH_SHORT).show();

                    et_account.setText(null);

                    et_password.setText(null);

                }

 

                break;

            case R.id.cb2: account=et_account.getText().toString().trim();

                password=et_password.getText().toString();

                if(TextUtils.isEmpty(account)){

                    Toast.makeText(this, "请输入账号", Toast.LENGTH_SHORT).show();

                    return;

                }

                if(TextUtils.isEmpty(password)){

                    Toast.makeText(this, "请输入密码", Toast.LENGTH_SHORT).show();

                    return;

                }

                if(b)

                    Toast.makeText(this, "登录成功", Toast.LENGTH_SHORT).show();

                else{

                    Toast.makeText(this, "请登录", Toast.LENGTH_SHORT).show();

                }

 

        }

    }

复制代码

复制代码

package com.example.myapplication;

 

import java.util.HashMap;

import java.util.Map;

 

import android.content.Context;

import android.content.SharedPreferences;

 

public class qq {

    public static boolean saveUserInfo(Context context,String account,String password ){

        SharedPreferences sp=context.getSharedPreferences("data", context.MODE_PRIVATE);

        SharedPreferences.Editor editor=sp.edit();

        editor.putString("Username", account);

        editor.putString("pwd", password);

        editor.commit();

        return true;

    }

 

 

 

    public static Map<String, String> getUserInfo(Context context){

 

        SharedPreferences sp=context.getSharedPreferences("data", context.MODE_PRIVATE);

        String account=sp.getString("Username", null);

        String password=sp.getString("pwd", null);

        Map<String, String> userMap=new HashMap<String,String>();

        userMap.put("account", account);

        userMap.put("password", password);

        return userMap;

 

 

    }

 

}

package com.example.myapplication;

 

import android.content.Context;

import android.content.SharedPreferences;

 

import java.util.HashMap;

import java.util.Map;

 

public class saveQQ {

    public static boolean SaveUserInfo(Context context, String account, String password) {

        SharedPreferences sp = context.getSharedPreferences("data", Context.MODE_PRIVATE);

        SharedPreferences.Editor edit = sp.edit();

        edit.putString("account", account);

        edit.putString("pwd", password);

        edit.commit();

        return true;

    }

    public static Map<String,String>getUserInfo(Context context){

        SharedPreferences sp=context.getSharedPreferences("data",Context.MODE_PRIVATE);

        String account=sp.getString("account",null);

        String password=sp.getString("pwd",null);

        Map<String,String>userMap=new HashMap<String,String>();

        userMap.put("account",account);

        userMap.put("password",password);

        return userMap;

    }

 

 

}