app/src/main/java/one/nem/kidshift/ChildLoginActivity.java

@@ -1,6 +1,10 @@
 package one.nem.kidshift;
 
 import android.os.Bundle;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.widget.EditText;
+import android.widget.Toast;
 
 import androidx.activity.EdgeToEdge;
 import androidx.appcompat.app.AppCompatActivity;
@@ -10,6 +14,9 @@ import androidx.core.view.WindowInsetsCompat;
 
 public class ChildLoginActivity extends AppCompatActivity {
 
+
+    private EditText loginCode1, loginCode2, loginCode3, loginCode4, loginCode5, loginCode6, loginCode7, loginCode8;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -20,5 +27,63 @@ public class ChildLoginActivity extends AppCompatActivity {
             v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
             return insets;
         });
+
+        // コードのフォーカスを自動で移動する
+        loginCode1 = findViewById(R.id.loginCode_1);
+        loginCode2 = findViewById(R.id.loginCode_2);
+        loginCode3 = findViewById(R.id.loginCode_3);
+        loginCode4 = findViewById(R.id.loginCode_4);
+        loginCode5 = findViewById(R.id.loginCode_5);
+        loginCode6 = findViewById(R.id.loginCode_6);
+        loginCode7 = findViewById(R.id.loginCode_7);
+        loginCode8 = findViewById(R.id.loginCode_8);
+
+        loginCode1.addTextChangedListener(new LoginCodeTextWatcher(loginCode1, loginCode2));
+        loginCode2.addTextChangedListener(new LoginCodeTextWatcher(loginCode2, loginCode3));
+        loginCode3.addTextChangedListener(new LoginCodeTextWatcher(loginCode3, loginCode4));
+        loginCode4.addTextChangedListener(new LoginCodeTextWatcher(loginCode4, loginCode5));
+        loginCode5.addTextChangedListener(new LoginCodeTextWatcher(loginCode5, loginCode6));
+        loginCode6.addTextChangedListener(new LoginCodeTextWatcher(loginCode6, loginCode7));
+        loginCode7.addTextChangedListener(new LoginCodeTextWatcher(loginCode7, loginCode8));
+        loginCode8.addTextChangedListener(new LoginCodeTextWatcher(loginCode8, null));
+
+        // ログインボタンを押したときの処理
+        findViewById(R.id.childLoginButton).setOnClickListener(v -> {
+            Toast.makeText(this, "ログインコード: " + getLoginCode(), Toast.LENGTH_SHORT).show();
+        });
+    }
+
+    private String getLoginCode() {
+        return loginCode1.getText().toString() +
+                loginCode2.getText().toString() +
+                loginCode3.getText().toString() +
+                loginCode4.getText().toString() +
+                loginCode5.getText().toString() +
+                loginCode6.getText().toString() +
+                loginCode7.getText().toString() +
+                loginCode8.getText().toString();
+    }
+
+    private static class LoginCodeTextWatcher implements TextWatcher {
+        private EditText currentView;
+        private final EditText nextView;
+
+        LoginCodeTextWatcher(EditText currentView, EditText nextView) {
+            this.currentView = currentView;
+            this.nextView = nextView;
+        }
+
+        @Override
+        public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+        @Override
+        public void onTextChanged(CharSequence s, int start, int before, int count) { }
+
+        @Override
+        public void afterTextChanged(Editable s) {
+            if (s.length() == 1 && nextView != null) {
+                nextView.requestFocus();
+            }
+        }
     }
 }