chore: initialize repository with gitignore

hw4/task2-complex-controls/app/build.gradle

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+apply plugin: 'com.android.application'
+
+configurations.configureEach {
+    exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jdk7'
+    exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib-jdk8'
+}
+
+android {
+    namespace 'com.example.task2complexcontrols'
+    compileSdk 34
+
+    defaultConfig {
+        applicationId 'com.example.task2complexcontrols'
+        minSdk 26
+        targetSdk 34
+        versionCode 1
+        versionName '1.0'
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+
+    testOptions {
+        animationsDisabled true
+    }
+}
+
+dependencies {
+    implementation 'androidx.appcompat:appcompat:1.7.0'
+    implementation 'androidx.core:core:1.13.1'
+
+    androidTestImplementation 'androidx.test:core:1.5.0'
+    androidTestImplementation 'androidx.test:runner:1.5.2'
+    androidTestImplementation 'androidx.test:rules:1.5.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-intents:3.5.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.5.1'
+    androidTestImplementation 'junit:junit:4.13.2'
+}

hw4/task2-complex-controls/app/src/androidTest/java/com/example/task2complexcontrols/MainActivityComplexUiTest.java

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+package com.example.task2complexcontrols;
+
+import static androidx.test.espresso.Espresso.onData;
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.action.ViewActions.closeSoftKeyboard;
+import static androidx.test.espresso.action.ViewActions.replaceText;
+import static androidx.test.espresso.action.ViewActions.scrollTo;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.matcher.ViewMatchers.isChecked;
+import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static androidx.test.espresso.matcher.ViewMatchers.isEnabled;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+import static androidx.test.espresso.matcher.ViewMatchers.withSpinnerText;
+import static androidx.test.espresso.matcher.ViewMatchers.withText;
+import static org.hamcrest.Matchers.allOf;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.instanceOf;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import android.app.UiAutomation;
+import android.view.accessibility.AccessibilityEvent;
+
+import androidx.test.core.app.ActivityScenario;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.concurrent.TimeoutException;
+
+@RunWith(AndroidJUnit4.class)
+public class MainActivityComplexUiTest {
+
+    private ActivityScenario<MainActivity> activityScenario;
+
+    @Before
+    public void setUp() {
+        activityScenario = ActivityScenario.launch(MainActivity.class);
+    }
+
+    @After
+    public void tearDown() {
+        activityScenario.close();
+    }
+
+    /**
+     * 协议复选框应直接控制提交按钮是否可点击。
+     */
+    @Test
+    public void testAgreementToggle_ChangesButtonState() {
+        onView(withId(R.id.btn_submit)).check(matches(not(isEnabled())));
+
+        onView(withId(R.id.cb_agreement)).perform(scrollTo(), click());
+
+        onView(withId(R.id.cb_agreement)).check(matches(isChecked()));
+        onView(withId(R.id.btn_submit)).check(matches(isEnabled()));
+    }
+
+    /**
+     * 单选按钮、复选框和 Spinner 都应支持正确选择并反映当前状态。
+     */
+    @Test
+    public void testSelectionControls_UpdateUiStateCorrectly() {
+        onView(withId(R.id.et_name)).perform(replaceText("赵六"), closeSoftKeyboard());
+        onView(withId(R.id.rb_female)).perform(click());
+        onView(withId(R.id.cb_sport)).perform(scrollTo(), click());
+        onView(withId(R.id.cb_read)).perform(scrollTo(), click());
+        selectCity("上海");
+
+        onView(withId(R.id.et_name)).check(matches(withText("赵六")));
+        onView(withId(R.id.rb_female)).check(matches(isChecked()));
+        onView(withId(R.id.cb_sport)).check(matches(isChecked()));
+        onView(withId(R.id.cb_read)).check(matches(isChecked()));
+        onView(withId(R.id.spinner_city)).check(matches(withSpinnerText(containsString("上海"))));
+    }
+
+    /**
+     * 完整提交流程应输出与 Spinner 当前选择一致的 Toast 提示。
+     */
+    @Test
+    public void testSubmitFlow_ShowsToastWithSelectedCity() {
+        onView(withId(R.id.et_name)).perform(replaceText("孙七"), closeSoftKeyboard());
+        onView(withId(R.id.rb_male)).perform(click());
+        onView(withId(R.id.cb_sport)).perform(scrollTo(), click());
+        onView(withId(R.id.cb_music)).perform(scrollTo(), click());
+        selectCity("深圳");
+        onView(withId(R.id.cb_agreement)).perform(scrollTo(), click());
+
+        onView(withId(R.id.rb_male)).check(matches(isChecked()));
+        onView(withId(R.id.cb_sport)).check(matches(isChecked()));
+        onView(withId(R.id.cb_music)).check(matches(isChecked()));
+        onView(withId(R.id.spinner_city)).check(matches(withSpinnerText(containsString("深圳"))));
+        onView(withId(R.id.btn_submit)).check(matches(isEnabled()));
+
+        clickAndAssertToast("提交成功！您选择的城市是：深圳");
+    }
+
+    private void selectCity(String city) {
+        onView(withId(R.id.spinner_city)).perform(scrollTo(), click());
+        onData(allOf(is(instanceOf(String.class)), is(city))).perform(click());
+    }
+
+    private void clickAndAssertToast(String message) {
+        UiAutomation uiAutomation = InstrumentationRegistry.getInstrumentation().getUiAutomation();
+
+        try {
+            AccessibilityEvent event = uiAutomation.executeAndWaitForEvent(
+                    () -> onView(withId(R.id.btn_submit)).perform(scrollTo(), click()),
+                    candidate -> candidate.getEventType() == AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED
+                            && containsText(candidate, message),
+                    5000
+            );
+            assertNotNull(event);
+        } catch (TimeoutException exception) {
+            fail("Toast not shown: " + message);
+        }
+    }
+
+    private boolean containsText(AccessibilityEvent event, String message) {
+        for (CharSequence text : event.getText()) {
+            if (message.contentEquals(text)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

hw4/task2-complex-controls/app/src/main/AndroidManifest.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <application
+        android:label="@string/app_name"
+        android:theme="@style/Theme.Task2ComplexControls">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

hw4/task2-complex-controls/app/src/main/java/com/example/task2complexcontrols/MainActivity.java

@@ -0,0 +1,58 @@
+package com.example.task2complexcontrols;
+
+import android.os.Bundle;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.Spinner;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class MainActivity extends AppCompatActivity {
+
+    private EditText etName;
+    private Spinner spinnerCity;
+    private CheckBox cbAgreement;
+    private Button btnSubmit;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        etName = findViewById(R.id.et_name);
+        spinnerCity = findViewById(R.id.spinner_city);
+        cbAgreement = findViewById(R.id.cb_agreement);
+        btnSubmit = findViewById(R.id.btn_submit);
+
+        setupCitySpinner();
+        setupAgreementRule();
+        setupSubmitAction();
+    }
+
+    private void setupCitySpinner() {
+        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
+                this,
+                R.array.city_options,
+                android.R.layout.simple_spinner_item
+        );
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        spinnerCity.setAdapter(adapter);
+    }
+
+    private void setupAgreementRule() {
+        // 未勾选协议时禁止提交，勾选后恢复可点击。
+        btnSubmit.setEnabled(false);
+        cbAgreement.setOnCheckedChangeListener((buttonView, isChecked) -> btnSubmit.setEnabled(isChecked));
+    }
+
+    private void setupSubmitAction() {
+        btnSubmit.setOnClickListener(view -> {
+            String city = String.valueOf(spinnerCity.getSelectedItem());
+            String message = getString(R.string.toast_submit_message, city);
+            Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
+        });
+    }
+}

hw4/task2-complex-controls/app/src/main/res/layout/activity_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="20dp">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp"
+            android:text="@string/title_form"
+            android:textSize="22sp"
+            android:textStyle="bold" />
+
+        <EditText
+            android:id="@+id/et_name"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp"
+            android:hint="@string/hint_name"
+            android:inputType="textPersonName" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/label_gender"
+            android:textStyle="bold" />
+
+        <RadioGroup
+            android:id="@+id/rg_gender"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp"
+            android:orientation="horizontal">
+
+            <RadioButton
+                android:id="@+id/rb_male"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/option_male" />
+
+            <RadioButton
+                android:id="@+id/rb_female"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="20dp"
+                android:text="@string/option_female" />
+        </RadioGroup>
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/label_hobbies"
+            android:textStyle="bold" />
+
+        <CheckBox
+            android:id="@+id/cb_sport"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/option_sport" />
+
+        <CheckBox
+            android:id="@+id/cb_read"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/option_read" />
+
+        <CheckBox
+            android:id="@+id/cb_music"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp"
+            android:text="@string/option_music" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/label_city"
+            android:textStyle="bold" />
+
+        <Spinner
+            android:id="@+id/spinner_city"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp" />
+
+        <CheckBox
+            android:id="@+id/cb_agreement"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp"
+            android:text="@string/label_agreement" />
+
+        <Button
+            android:id="@+id/btn_submit"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:enabled="false"
+            android:text="@string/action_submit" />
+
+    </LinearLayout>
+</ScrollView>

hw4/task2-complex-controls/app/src/main/res/values/arrays.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="city_options">
+        <item>北京</item>
+        <item>上海</item>
+        <item>广州</item>
+        <item>深圳</item>
+    </string-array>
+</resources>

hw4/task2-complex-controls/app/src/main/res/values/strings.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Task 2 Complex Controls</string>
+    <string name="title_form">用户信息提交</string>
+    <string name="hint_name">请输入姓名</string>
+    <string name="label_gender">请选择性别</string>
+    <string name="label_hobbies">请选择兴趣爱好</string>
+    <string name="label_city">请选择城市</string>
+    <string name="label_agreement">我已阅读并同意用户协议</string>
+    <string name="action_submit">提交信息</string>
+    <string name="option_male">男</string>
+    <string name="option_female">女</string>
+    <string name="option_sport">运动</string>
+    <string name="option_read">阅读</string>
+    <string name="option_music">音乐</string>
+    <string name="toast_submit_message">提交成功！您选择的城市是：%1$s</string>
+</resources>

hw4/task2-complex-controls/app/src/main/res/values/themes.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.Task2ComplexControls" parent="Theme.AppCompat.Light.NoActionBar" />
+</resources>