Creation and jump of activity

Mission requirements ：
All classes need to be submitted Java Source file code and layout file code （xml file ）, Be careful ： Submit Java Select the code language as Java, When submitting the layout file code, select the code language as XML

Task description ：
Achieve the following program effects as required , Figure 1 shows the main interface of the program .
（1） Click in the interface “ Please log in ” Jump to the login screen , Click on the login screen “ One click login of the local number ” Button to return to the main interface of the program , And the mobile phone number entered by the user is returned to the main interface and displayed in the position of the member name , What was just shown “ Please log in ” Change it to “ Logged in ”;
（2） Click... In the main interface “ Frequently used information ” Jump to the common information interface , When jumping, you need to put all the information （ full name 、 cell-phone number 、 mailbox 、 Address , These attributes need to be encapsulated in Information Class , Transfer data by object ） Transfer to this interface for display .
The picture resources required in the program are connected ：https://pan.baidu.com/s/1T624eEXyt9kFSfvdGuGdhw Extraction code ：p9g9

AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.homework07">

    <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label=" Journey " android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme">
        <activity android:name=".LoginActivity" android:label=" Sign in "></activity>
        <activity android:name=".InformationActivity" android:label=" Frequently used information "></activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:layout_margin="20dp">
        <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/colorPrimary">
            <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/photo"/>
            <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical">
                <TextView android:id="@+id/tv_user" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" Dear members " android:textColor="@android:color/white" android:textSize="23sp" android:textStyle="bold" android:layout_marginTop="5dp"/>
                <TextView android:id="@+id/tv_login" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:text=" Please log in " android:textColor="@android:color/white" android:textSize="15sp"/>
            </LinearLayout>
        </LinearLayout>
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" My tools " android:textSize="26sp" android:textColor="#737373" android:layout_marginTop="10dp"/>
        <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@android:color/white" android:padding="15dp">
            <LinearLayout android:id="@+id/information" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:layout_margin="10dp">
                <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:src="@drawable/info"/>
                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" Frequently used information " android:textSize="16sp" android:layout_marginTop="10dp"/>
            </LinearLayout>
            <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:layout_margin="10dp">
                <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:src="@drawable/video"/>
                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" Live broadcast " android:textSize="16sp" android:layout_marginTop="10dp"/>
            </LinearLayout>
            <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:layout_margin="10dp">
                <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:src="@drawable/outside"/>
                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" Travel list " android:textSize="16sp" android:layout_marginTop="10dp"/>
            </LinearLayout>
            <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:layout_margin="10dp">
                <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:src="@drawable/travel"/>
                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" Travel footprints " android:textSize="16sp" android:layout_marginTop="10dp"/>
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

login_layout.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent">
    <ImageView android:layout_width="120dp" android:layout_height="120dp" android:src="@drawable/photo" android:layout_marginTop="80dp" android:layout_gravity="center_horizontal"/>
    <EditText android:id="@+id/phoneNum" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="number" android:hint=" Please enter this phone number " android:layout_margin="16dp"/>
    <Button android:id="@+id/btn_login" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="16dp" android:layout_marginRight="16dp" android:text=" One click login of the local number " android:textColor="@android:color/white" android:background="#FF8800"/>
    <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="16dp" android:layout_marginRight="16dp" android:text=" Other ways to log in " android:textColor="#737373" android:background="#FAFAFA" android:layout_marginTop="10dp"/>
</LinearLayout>

info_layout.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent">
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="16dp">
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" full name ：" android:textSize="20sp"/>
        <EditText android:id="@+id/et_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="20sp"/>
    </LinearLayout>
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="16dp">
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" Phone number ：" android:textSize="20sp"/>
        <EditText android:id="@+id/et_phone" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="20sp"/>
    </LinearLayout>
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="16dp">
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" mailbox ：" android:textSize="20sp"/>
        <EditText android:id="@+id/et_email" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="20sp"/>
    </LinearLayout>
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="16dp">
        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" Address ：" android:textSize="20sp"/>
        <EditText android:id="@+id/et_address" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="20sp"/>
    </LinearLayout>
</LinearLayout>

MainActivity.java：

package com.example.homework07;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    

    private TextView loginTextView;
    private  TextView user;
    private final int LOGIN_REQUEST = 99;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        LinearLayout information = findViewById(R.id.information);
        loginTextView = findViewById(R.id.tv_login);
        user = findViewById(R.id.tv_user);

        loginTextView.setOnClickListener(new View.OnClickListener() {
    
            @Override
            public void onClick(View v) {
    
                //Activity Jump 
                Intent intent = new Intent();
                // Set purpose Activity class 
                intent.setClass(MainActivity.this,LoginActivity.class);
                // Jump to the new Activity, Return response 
                startActivityForResult(intent,LOGIN_REQUEST);
            }
        });

        information.setOnClickListener(new View.OnClickListener() {
    
            @Override
            public void onClick(View v) {
    
                //Activity Jump 
                Intent intent = new Intent();
                // Set purpose Activity class 
                intent.setClass(MainActivity.this,InformationActivity.class);
                // Pass custom type objects 
                Information info = new Information(" Wang Yibo ","189****1234","[email protected]"," China ");
                intent.putExtra("info",info);
                // Jump to the new Activity, No response returned 
                startActivity(intent);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == 100 && requestCode == LOGIN_REQUEST){
    
            String phoneNum = data.getStringExtra("phoneNum");
            // Consider that the number of digits of mobile phone number in real life is 11 position 
            if(!phoneNum.isEmpty() && phoneNum.length()== 11){
    
                user.setText(phoneNum);
                loginTextView.setText(" Logged in ");
            }
        }
    }
}

LoginActivity.java：

package com.example.homework07;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class LoginActivity extends AppCompatActivity {
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login_layout);

        final EditText text = findViewById(R.id.phoneNum);
        Button loginBtn = findViewById(R.id.btn_login);
        loginBtn.setOnClickListener(new View.OnClickListener() {
    
            @Override
            public void onClick(View v) {
    
                // Return the data 
                Intent response = new Intent();
                response.putExtra("phoneNum",text.getText().toString());
                // Respond to 
                setResult(100,response);
                // End the current LoginActivity
                finish();
            }
        });
    }
}

InformationActivity.java：

package com.example.homework07;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.widget.EditText;

public class InformationActivity extends AppCompatActivity {
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.info_layout);

        // Accept from MainActivity Data transferred 
        Intent request = getIntent();
        // Get custom type data 
        Information information = (Information) request.getSerializableExtra("info");
        String name = information.getName();
        String phone = information.getPhone();
        String email = information.getEmail();
        String address = information.getAddress();

        EditText nameET = findViewById(R.id.et_name);
        EditText phoneET = findViewById(R.id.et_phone);
        EditText emailET = findViewById(R.id.et_email);
        EditText addressET = findViewById(R.id.et_address);

        nameET.setText(name);
        phoneET.setText(phone);
        emailET.setText(email);
        addressET.setText(address);
    }
}

Information.java：

package com.example.homework07;

import java.io.Serializable;

// Use Intent When passing objects of this type , You need to make this class implement Serializable Interface 
public class Information implements Serializable {
    
    private String name;
    private String phone;
    private String email;
    private String address;

    public String getName() {
    
        return name;
    }

    public void setName(String name) {
    
        this.name = name;
    }

    public String getPhone() {
    
        return phone;
    }

    public void setPhone(String phone) {
    
        this.phone = phone;
    }

    public String getEmail() {
    
        return email;
    }

    public void setEmail(String email) {
    
        this.email = email;
    }

    public String getAddress() {
    
        return address;
    }

    public void setAddress(String address) {
    
        this.address = address;
    }

    public Information() {
    
    }

    public Information(String name, String phone, String email, String address) {
    
        this.name = name;
        this.phone = phone;
        this.email = email;
        this.address = address;
    }
}