Android app login and registration functions

Disclaimer: This is a blogger's original article, please support look like. https://blog.csdn.net/qq_39925376/article/details/90340271

1. Log
1.1 class files

public class LoginActivity extends Activity{
	EditText username;
	EditText password;
	Button login,register;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_login_first);
		findViews();
	}
	private void findViews() {
		username=(EditText) findViewById(R.id.username);
		password=(EditText) findViewById(R.id.password);
		login=(Button) findViewById(R.id.login);
		register=(Button) findViewById(R.id.register);
		login.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				String name=username.getText().toString();
				String pass=password.getText().toString();
				Log.i("TAG",name+"_"+pass);
				UserService uService=new UserService(LoginActivity.this);
				boolean flag=uService.login(name, pass);
				if(flag){
					Log.i("TAG","登录成功");
					Toast.makeText(LoginActivity.this, "登录成功",
					Toast.LENGTH_LONG).show();
					 Intent intent = new Intent(LoginActivity.this,
					 PersonalActivity.class);
					 startActivity(intent);
				}else{
					Log.i("TAG","登录失败");
					Toast.makeText(LoginActivity.this, "登录失败", 
					Toast.LENGTH_LONG).show();
				}
			}
		});
		register.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				Intent intent=new Intent(LoginActivity.this,
				RegisterActivity.class);
				startActivity(intent);}
		});}
}

1.2 file structure

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">
    
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="169dp"
        android:orientation="vertical" >
        
        <Button
            android:id="@+id/btn_home"
            android:layout_width="40dp"
            android:layout_height="36dp"
            android:layout_marginTop="13dp"
            android:background="@mipmap/cb_icon_discover_selected"
            android:contentDescription="@string/app_name" />

        <ImageView
            android:id="@+id/imageview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:contentDescription="@string/app_name"
            android:src="@mipmap/cb_icon_more_selected" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/imageview"
            android:layout_centerHorizontal="true"
            android:paddingTop="10dp"
            android:text="@string/please_login_text"
            android:textColor="@color/base_text_color"
            android:textSize="@dimen/txt_h3" />
    </RelativeLayout>

    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:stretchColumns="1" >

        <TableRow >

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="用户名：" 
                android:textColor="@color/white"/>
            <EditText
                android:id="@+id/username"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:hint="请输入用户名" />
        </TableRow>
        <TableRow >
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="密码：" 
            	android:textColor="@color/white" />
            <EditText
                android:id="@+id/password"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:hint="请输入密码" />
        </TableRow>
        <TableRow >
            <TextView />
            <LinearLayout >
                <Button
                    android:id="@+id/login"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:text="登录" />
                <Button
                    android:id="@+id/register"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:text="注册" />
            </LinearLayout>
        </TableRow>
    </TableLayout>
</LinearLayout>

2. Sign up
2.1 class file

public class RegisterActivity extends Activity {
	EditText username;
	EditText password;
	EditText age;
	RadioGroup sex;	
	Button register;
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_register);
		findViews();
		register.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				String name=username.getText().toString().trim();
				String pass=password.getText().toString().trim();
				String agestr=age.getText().toString().trim();
				String sexstr=((RadioButton)RegisterActivity.
				this.findViewById(
				sex.getCheckedRadioButtonId())).getText().toString();
				Log.i("TAG",name+"_"+pass+"_"+agestr+"_"+sexstr);
				UserService uService=new UserService(RegisterActivity.this);
				User user=new User();
				user.setUsername(name);
				user.setPassword(pass);
				user.setAge(Integer.parseInt(agestr));
				user.setSex(sexstr);
				uService.register(user);
				Toast.makeText(RegisterActivity.this, "注册成功", 
				Toast.LENGTH_LONG).show();
			}
		});}
	private void findViews() {
		username=(EditText) findViewById(R.id.usernameRegister);
		password=(EditText) findViewById(R.id.passwordRegister);
		age=(EditText) findViewById(R.id.ageRegister);
		sex=(RadioGroup) findViewById(R.id.sexRegister);
		register=(Button) findViewById(R.id.Register);}
}

2.2 file structure

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

    <TextView
        android:layout_width="match_parent"
        android:layout_height="91dp"
        android:layout_gravity="center"
        android:gravity="center"
        android:text="注册"
        android:textSize="28dp"
        android:textStyle="bold" />

    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:stretchColumns="1" >

        <TableRow >
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="用户名："
                android:textColor="@color/white" />

            <EditText
                android:id="@+id/usernameRegister"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:hint="请输入用户名" />
        </TableRow>
        <TableRow >

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="密码："
                android:textColor="@color/white" />

            <EditText
                android:id="@+id/passwordRegister"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:hint="请输入密码" />
        </TableRow>

        <TableRow >

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="年龄："
                android:textColor="@color/white" />

            <EditText
                android:id="@+id/ageRegister"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:hint="请输入年龄" />
        </TableRow>

        <TableRow >
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="性别："
                android:textColor="@color/white"/>

            <RadioGroup
                android:id="@+id/sexRegister"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:checkedButton="@+id/woman"
                android:orientation="horizontal" >

                <RadioButton
                    android:id="@+id/nan"
                    android:text="男"
                    android:textColor="@color/white" />

                <RadioButton
                    android:id="@+id/women"
                    android:text="女"
                    android:textColor="@color/white" />
            </RadioGroup>
        </TableRow>
        <TableRow >
            <TextView />
            <LinearLayout >

                <Button
                    android:id="@+id/Register"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:text="注册" />
            </LinearLayout>

        </TableRow>
    </TableLayout>

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.97"
        android:orientation="vertical" >
    </LinearLayout>

    <LinearLayout
        android:id="@+id/LinearLayout14"
        android:layout_width="match_parent"
        android:layout_height="26dp"
        android:background="@color/color_nav_text"
        android:orientation="horizontal" >

        <ImageView
            android:id="@+id/imageView5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/back" />

        <LinearLayout
            android:id="@+id/linearLayout16"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="0.18"
            android:orientation="vertical" >
        </LinearLayout>

        <ImageView
            android:id="@+id/imageView6"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/home" />

        <LinearLayout
            android:id="@+id/linearLayout17"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="0.17"
            android:orientation="vertical" >
        </LinearLayout>

        <ImageView
            android:id="@+id/imageView7"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/search" />
    </LinearLayout>
</LinearLayout>