Gloria-Alexandra Popa - Curs 2 - Code Challenge

app/src/main/AndroidManifest.xml

@@ -11,7 +11,10 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.AndroidFundamentalsMai2021">
-        <activity android:name=".MainActivity">
+        <activity android:name=".ConstraintLayoutSampleActivity"></activity>
+        <activity android:name=".MainActivity" />
+        <activity android:name=".EmailsActivity" />
+        <activity android:name=".StartActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/com/magdamiu/androidfundamentalsmai2021/ConstraintLayoutSampleActivity.java

@@ -0,0 +1,14 @@
+package com.magdamiu.androidfundamentalsmai2021;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.os.Bundle;
+
+public class ConstraintLayoutSampleActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_constraint_layout_sample);
+    }
+}

app/src/main/java/com/magdamiu/androidfundamentalsmai2021/EmailAdapter.java

@@ -0,0 +1,40 @@
+package com.magdamiu.androidfundamentalsmai2021;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import java.util.List;
+
+public class EmailAdapter extends RecyclerView.Adapter<EmailViewHolder> {
+    private List<Mail> emails;
+
+    public EmailAdapter(List<Mail> emails) {
+        this.emails = emails;
+    }
+
+    // creates the item view, only the UI elements (it's like a template)
+    @NonNull
+    @Override
+    public EmailViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.email_item, parent, false);
+        return new EmailViewHolder(itemView);
+    }
+
+    // fills the item with the corresponding element from the list (data source)
+    @Override
+    public void onBindViewHolder(@NonNull EmailViewHolder holder, int position) {
+        Mail currentMail = emails.get(position);
+        holder.getTextViewSender().setText(currentMail.getSenderName());
+        holder.getTextViewSubject().setText(currentMail.getSubject());
+    }
+
+    // decides how many items to create in our recycler view
+    @Override
+    public int getItemCount() {
+        return emails.size();
+    }
+}

app/src/main/java/com/magdamiu/androidfundamentalsmai2021/EmailViewHolder.java

@@ -0,0 +1,29 @@
+package com.magdamiu.androidfundamentalsmai2021;
+
+import android.view.View;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+// the class associated to the item of the recycler view
+// each UI element from the item should have a dedicated field in this class
+public class EmailViewHolder extends RecyclerView.ViewHolder {
+    final private TextView textViewSender;
+    final private TextView textViewSubject;
+
+    public EmailViewHolder(@NonNull View itemView) {
+        super(itemView);
+
+        textViewSender = itemView.findViewById(R.id.textViewSender);
+        textViewSubject = itemView.findViewById(R.id.textViewSubject);
+    }
+
+    public TextView getTextViewSender() {
+        return textViewSender;
+    }
+
+    public TextView getTextViewSubject() {
+        return textViewSubject;
+    }
+}

app/src/main/java/com/magdamiu/androidfundamentalsmai2021/EmailsActivity.java

@@ -0,0 +1,61 @@
+package com.magdamiu.androidfundamentalsmai2021;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import android.os.Bundle;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class EmailsActivity extends AppCompatActivity {
+
+    private List<Mail> emails;
+    private RecyclerView recyclerViewEmails;
+    private RecyclerView.LayoutManager layoutManager;
+    private EmailAdapter emailAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_emails);
+
+        // data source for our RecyclerView
+        populateListOfEmails();
+
+        // init the ui elements
+        initView();
+
+        // set the linear layout manager to our recycler view
+        setLayoutManager();
+
+        // set the adapter to our recycler view
+        setAdapter();
+    }
+
+    private void initView() {
+        recyclerViewEmails = findViewById(R.id.recyclerViewEmails);
+    }
+
+    private void populateListOfEmails() {
+        emails = new ArrayList<>();
+        Mail newEmail = new Mail(1, "Magda", "Curs Android");
+        emails.add(newEmail);
+        for (int i = 1; i < 20; i++) {
+            int index = i + 1;
+            newEmail = new Mail(index, "Sender " + index, "Subject " + index);
+            emails.add(newEmail);
+        }
+    }
+
+    private void setLayoutManager() {
+        layoutManager = new LinearLayoutManager(this);
+        recyclerViewEmails.setLayoutManager(layoutManager);
+    }
+
+    private void setAdapter() {
+        emailAdapter = new EmailAdapter(emails);
+        recyclerViewEmails.setAdapter(emailAdapter);
+    }
+}

app/src/main/java/com/magdamiu/androidfundamentalsmai2021/Mail.java

@@ -0,0 +1,37 @@
+package com.magdamiu.androidfundamentalsmai2021;
+
+public class Mail {
+    private int id;
+    private String senderName;
+    private String subject;
+
+    public Mail(int id, String senderName, String subject) {
+        this.id = id;
+        this.senderName = senderName;
+        this.subject = subject;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getSenderName() {
+        return senderName;
+    }
+
+    public void setSenderName(String senderName) {
+        this.senderName = senderName;
+    }
+
+    public String getSubject() {
+        return subject;
+    }
+
+    public void setSubject(String subject) {
+        this.subject = subject;
+    }
+}

app/src/main/java/com/magdamiu/androidfundamentalsmai2021/MainActivity.java

@@ -3,7 +3,9 @@
 import androidx.appcompat.app.AppCompatActivity;
 
 import android.os.Bundle;
+import android.text.TextUtils;
 import android.util.Log;
+import android.util.Patterns;
 import android.view.View;
 import android.webkit.WebView;
 import android.widget.AdapterView;
@@ -21,6 +23,8 @@ public class MainActivity extends AppCompatActivity {
     private static final String ANDROID_URL = "https://developer.android.com/";
 
     private EditText editTextName;
+    private EditText editTextEmail;
+    private EditText editTextPhone;
     private Button buttonDisplayGreetings;
     private TextView textViewGreetings;
 
@@ -33,20 +37,22 @@ public class MainActivity extends AppCompatActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        /*setContentView(R.layout.activity_main);*/
-        /*setContentView(R.layout.sample);*/
-        // setContentView(R.layout.scrollview_sample);
-        // setContentView(R.layout.webview_sample);
+        /* setContentView(R.layout.activity_main);
+        setContentView(R.layout.sample);
+        setContentView(R.layout.code_challenge_c2);
+        setContentView(R.layout.scrollview_sample);
+        setContentView(R.layout.webview_sample);
         setContentView(R.layout.spinner_sample);
+        setContentView(R.layout.code_challenge2_c3); */
+        setContentView(R.layout.code_challenge1_c3);
 
-        setAndroidVersions();
+        /* setAndroidVersions();
         initialiseSpinnerAdapter();
         setSpinnerAdapter();
-        handlingSpinnerListener();
+        handlingSpinnerListener(); */
 
-        //loadUrl();
-
-        // initViews();
+        // loadUrl();
+        initViews();
         displayLogs();
     }
 
@@ -60,6 +66,7 @@ private void setAndroidVersions() {
         androidVersions.add("kitkat");
     }
 
+
     // step 2: initialise adapter for our spinner
     // ArrayAdapter is a default adapter
     private void initialiseSpinnerAdapter() {
@@ -89,18 +96,22 @@ public void onNothingSelected(AdapterView<?> adapterView) {
         });
     }
 
+
     // webview load url
     private void loadUrl() {
         webView = findViewById(R.id.webViewSample);
         webView.getSettings().setJavaScriptEnabled(true);
         webView.loadUrl(ANDROID_URL);
     }
 
+
     // init views for implementing a first simple form
     private void initViews() {
         editTextName = findViewById(R.id.editTextName);
         buttonDisplayGreetings = findViewById(R.id.buttonDisplayGreetings);
         textViewGreetings = findViewById(R.id.textViewGreetings);
+        editTextEmail = findViewById(R.id.editTextEmail);
+        editTextPhone = findViewById(R.id.editTextPhone);
     }
 
     private void displayLogs() {
@@ -128,4 +139,28 @@ public void displayGreetingsOnClick(View view) {
             Toast.makeText(MainActivity.this, getString(R.string.error_insert_name), Toast.LENGTH_LONG).show();
         }
     }
+
+    // Course 3: Code Challenge 1
+    public static boolean isValidEmail(CharSequence target) {
+        return (!TextUtils.isEmpty(target) && Patterns.EMAIL_ADDRESS.matcher(target).matches());
+    }
+
+    public static boolean isValidPhone(CharSequence phone) {
+        return (!TextUtils.isEmpty(phone) && Patterns.PHONE.matcher(phone).matches());
+    }
+
+    public void displaySubmitOnClick(View view) {
+        String inputName = editTextEmail.getText().toString();
+        if (!isValidEmail(inputName)) {
+            editTextEmail.setError(getString(R.string.error_insert_email));
+            Toast.makeText(MainActivity.this, getString(R.string.error_insert_email),
+                    Toast.LENGTH_LONG).show();
+        }
+        inputName = editTextPhone.getText().toString();
+        if (!isValidPhone(inputName)) {
+            editTextPhone.setError(getString(R.string.error_insert_phone));
+            Toast.makeText(MainActivity.this, getString(R.string.error_insert_phone),
+                    Toast.LENGTH_LONG).show();
+        }
+    }
 }

app/src/main/java/com/magdamiu/androidfundamentalsmai2021/StartActivity.java

@@ -0,0 +1,34 @@
+package com.magdamiu.androidfundamentalsmai2021;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+
+public class StartActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_start);
+    }
+
+    public void startMainActivityOnClick(View view) {
+        // starts from the current activity, and moves the user to the Main Activity screen
+        Intent intentToStartMainActivity = new Intent(StartActivity.this, MainActivity.class);
+        startActivity(intentToStartMainActivity);
+    }
+
+    public void startRecyclerViewActivityOnClick(View view) {
+        // starts from the current activity, and moves the user to the Emails Activity screen
+        Intent intentToStartEmailsActivity = new Intent(StartActivity.this, EmailsActivity.class);
+        startActivity(intentToStartEmailsActivity);
+    }
+
+    public void startConstraintActivity(View view) {
+        // starts from the current activity, and moves the user to the Constraint Activity screen
+        Intent intentToStartConstraintActivity = new Intent(StartActivity.this, ConstraintLayoutSampleActivity.class);
+        startActivity(intentToStartConstraintActivity);
+    }
+}