第八次作业

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="50dp"
        android:src="@drawable/qq" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="30dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="账号:"
            android:textSize="30sp" />

        <EditText
            android:id="@+id/etName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入账号"
            android:textSize="30sp" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="30dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="密码:"
            android:textSize="30sp" />

        <EditText
            android:id="@+id/etPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入密码"
            android:inputType="textPassword"
            android:textSize="30sp" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="30dp">

        <CheckBox
            android:id="@+id/cbRemember"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:text="记住密码"
            android:textSize="20sp" />

        <Button
            android:id="@+id/btnLogin"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:onClick="btnLogin"
            android:text="登录"
            android:textSize="20sp" />

        <Button
            android:id="@+id/btnExit"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:text="取消"
            android:textSize="20sp" />

    </LinearLayout>


</LinearLayout>
    复制代码
    复制代码
    package com.example.minkexin;

    import android.app.Notification;
    import android.content.SharedPreferences;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.EditText;
    import android.widget.Toast;

    public class MainActivity extends AppCompatActivity {

    EditText userid;  //声明控件
    EditText lipassword;
    Button login;
    private CheckBox cbRemember;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    userid=(EditText)findViewById(R.id.userid); //控件的初始化
    lipassword=(EditText)findViewById(R.id.lipassword);
    login=(Button)findViewById(R.id.login);   //监听
    cbRemember = findViewById(R.id.cbRemember);
    SharedPreferences sp = getSharedPreferences("date", MODE_PRIVATE);
    userid.setText(sp.getString("name", ""));
    lipassword.setText(sp.getString("password", ""));



    login.setOnClickListener(new View.OnClickListener() {
    @Override   //方法的调用
    public void onClick(View view) {

    if ("admin".equals(userid.getText().toString())&&"admin".equals(lipassword.getText().toString())) {
    if (cbRemember.isChecked()) {
    SharedPreferences sp = getSharedPreferences("date", MODE_PRIVATE);
    SharedPreferences.Editor editor = sp.edit();
    editor.putString("name", userid.getText().toString());
    editor.putString("password", lipassword.getText().toString());
    editor.commit();
    Toast t1 = Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_SHORT);
    t1.show();
    } else {
    SharedPreferences sp = getSharedPreferences("date", MODE_PRIVATE);
    SharedPreferences.Editor editor = sp.edit();
    editor.putString("name", "");
    editor.putString("password", "");
    editor.commit();
    Toast t3 = Toast.makeText(getApplicationContext(), "登录成功，保存失败", Toast.LENGTH_SHORT);
    t3.show();

    }
    }
    else {
    Toast t2 = Toast.makeText(getApplicationContext(), "登录失败", Toast.LENGTH_SHORT);
    t2.show();
    userid.setText("");
    lipassword.setText("");
    }
    }
    });
    }
    }