Android studio 开发一个用户登录界面

宁静的小镇 發表於 2019-5-24 20:33:00

Android studio 开发一个用户登录界面

Android studio 开发一个用户登录界面
<img src="https://img2018.cnblogs.com/blog/956249/201905/956249-20190524202744322-1274970611.png">
<img src="https://img2018.cnblogs.com/blog/956249/201905/956249-20190524202818054-1658890931.png">
activity_main.xml
<div class="cnblogs_code">
<pre> 1 <?xml version="1.0" encoding="utf-8"?>
 2 <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 xmlns:app="http://schemas.android.com/apk/res-auto"
 4 xmlns:tools="http://schemas.android.com/tools"
 5 android:layout_width="match_parent"
 6 android:layout_height="match_parent"
 7 tools:context=".MainActivity">
 8
 9 <Button
10 android:id="@+id/button"
11 android:layout_width="203dp"
12 android:layout_height="46dp"
13 android:layout_marginEnd="120dp"
14 android:layout_marginRight="120dp"
15 android:layout_marginBottom="148dp"
16 android:hint="登录"
17 android:onClick="Check"
18 app:layout_constraintBottom_toBottomOf="parent"
19 app:layout_constraintEnd_toEndOf="parent"
20 app:layout_constraintHorizontal_bias="1.0"
21 app:layout_constraintStart_toStartOf="parent" />
22
23 <EditText
24 android:id="@+id/name"
25 android:layout_width="209dp"
26 android:layout_height="50dp"
27 android:layout_marginTop="324dp"
28 android:layout_marginEnd="92dp"
29 android:layout_marginRight="92dp"
30 android:ems="10"
31 android:hint="用户名"
32 android:inputType="textPersonName"
33 app:layout_constraintEnd_toEndOf="parent"
34 app:layout_constraintTop_toTopOf="parent" />
35
36 <EditText
37 android:id="@+id/pass"
38 android:layout_width="wrap_content"
39 android:layout_height="wrap_content"
40 android:layout_marginTop="200dp"
41 android:layout_marginEnd="96dp"
42 android:layout_marginRight="96dp"
43 android:ems="10"
44 android:hint="密码"
45 android:inputType="textPersonName"
46 app:layout_constraintEnd_toEndOf="parent"
47 app:layout_constraintTop_toTopOf="parent" />
48
49
50 </android.support.constraint.ConstraintLayout></pre>
</div>
<img src="https://img2018.cnblogs.com/blog/956249/201905/956249-20190524202928184-174451273.png">
MainActivity.java
<div class="cnblogs_code">
<pre> 1 package com.example.myapplication;
 2
 3 import android.os.Bundle;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.view.View;
 6 import android.widget.EditText;
 7 import android.widget.Toast;
 8
 9 public class MainActivity extends AppCompatActivity {
10 EditText name;//用户名
11 EditText pass;//密码
12 @Override
13 protected void onCreate(Bundle savedInstanceState) {
14 super.onCreate(savedInstanceState);
15 setContentView(R.layout.activity_main);
16
17 //写代码
18 name=(EditText) findViewById(R.id.name);//获取用户名
19 pass=(EditText) findViewById(R.id.pass);//获取密码
20
21 }
22 //登录验证代码
23 public voidCheck(View v) {
24 String mname = "hello";
25 String mpass = "1234";
26 String user = name.getText().toString().trim();
27 String pwd = pass.getText().toString().trim();
28 if (user.equals(mname) && pwd.equals(mpass)) {
29 Toast.makeText(this, "恭喜，通过", Toast.LENGTH_SHORT).show();
30 } else {
31 Toast.makeText(this, "很遗憾，继续努力", Toast.LENGTH_SHORT).show();
32 }
33 }
34
35
36 }</pre>
</div>
  
来源：https://www.cnblogs.com/lisa2016/p/10920075.html

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Android studio 开发一个用户登录界面