zoukankan      html  css  js  c++  java
  • 第八次作业

    xml

    <?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.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">

    <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#55000000"
    android:orientation="vertical"
    android:paddingLeft="30dp"
    android:paddingRight="30dp" >

    <LinearLayout
    android:layout_marginTop="80dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="horizontal" >

    <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="QQ"
    android:textColor="#fff"
    android:textSize="50dp" />
    </LinearLayout>
    <EditText
    android:id="@+id/userid"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp"
    android:background="@null"
    android:hint="QQ号/手机号/邮箱"
    android:maxLength="13"
    android:singleLine="true"
    android:textColor="#fff"
    android:textSize="25sp"
    android:textColorHint="#eee" />
    <View
    android:layout_width="match_parent"
    android:layout_height="1px"
    android:layout_marginTop="10dp"
    android:background="#eee" />
    <EditText
    android:id="@+id/lipassword"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:background="@null"
    android:hint="密码"
    android:inputType="textPassword"
    android:maxLength="13"
    android:singleLine="true"
    android:textColor="#fff"
    android:textSize="25dp"
    android:textColorHint="#eee" />
    <View
    android:layout_width="match_parent"
    android:layout_height="1px"
    android:layout_marginTop="10dp"
    android:background="#eee" />
    <Button
    android:id="@+id/login"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:background="#aaafff"
    android:text="登录"
    android:onClick="onClick"
    android:textColor="#fff"
    android:textSize="25sp" />
    <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:orientation="horizontal" >

    <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" />
    <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:gravity="right"
    android:text="新用户注册"
    android:textColor="#cc1CA4DE"
    android:textSize="20dp" />
    </LinearLayout>
    </LinearLayout>

    </android.support.constraint.ConstraintLayout>
    java
    package com.example.denglu;

    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("");
    }
    }
    });
    }

    }

    图片

     

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  • 原文地址:https://www.cnblogs.com/lixiaoai/p/11770809.html
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