為什么Intent無法與setOnItemClickListener一起使用？

Question

我試圖通過調用setOnItemClickListener並使傳入的意圖開始我的新活動，以使我的listItem可點擊，但是它不起作用。 基本上，我的意圖是將相同的活動與不同的數據重用，但是現在，我只想按順序獲得單擊功能。 但是，此基本功能不起作用。

所謂“無效”，並不表示該應用程序崩潰了。 我的意思是listItem點擊沒有調用目標的Activity。

我已將代碼放在onCreate中：

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

        listView = (ListView) findViewById(R.id.lvSemesters);
        databaseHelper = new DatabaseHelper(MainActivity.this);
        semesterList = new DatabaseHelper(MainActivity.this).getAllSemesters();
        this.adapter = new SemesterAdapter(MainActivity.this, semesterList);
        floatActionButton = (FloatingActionButton) findViewById(R.id.addActionButton);


        floatActionButton.setOnClickListener(this);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent intent = new Intent(MainActivity.this, CourseActivity.class);
                startActivity(intent);
            }
        });
    }

這是我完整的MainActivity，以防萬一：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private ListView listView;
    private DatabaseHelper databaseHelper;
    private SQLiteDatabase db;
    private FloatingActionButton floatActionButton;
    private SemesterAdapter adapter;
    List<SemesterEntity> semesterList;

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

        listView = (ListView) findViewById(R.id.lvSemesters);
        databaseHelper = new DatabaseHelper(MainActivity.this);
        semesterList = new DatabaseHelper(MainActivity.this).getAllSemesters();
        this.adapter = new SemesterAdapter(MainActivity.this, semesterList);
        floatActionButton = (FloatingActionButton) findViewById(R.id.addActionButton);


        floatActionButton.setOnClickListener(this);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent intent = new Intent(MainActivity.this, CourseActivity.class);
                startActivity(intent);
            }
        });
    }

    protected void createDatabase() {
        db = openOrCreateDatabase("semesterDatabase", Context.MODE_PRIVATE, null);
        db.execSQL("CREATE TABLE IF NOT EXISTS semesterTable(id INTEGER PRIMARY KEY, semester VARCHAR);");
    }

    public void select() {
        databaseHelper = new DatabaseHelper(MainActivity.this);
        semesterList = databaseHelper.getAllSemesters();
        SemesterAdapter adapter = new SemesterAdapter(MainActivity.this, semesterList);
        listView.setAdapter(adapter);
        adapter.notifyDataSetChanged();
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        int counter = databaseHelper.getUsersCount();
        if (counter < 8) {
            switch (id) {
                case R.id.addActionButton:
                    String semesterName = "Semester";
                    String query = "INSERT INTO semesterTable (semester) VALUES('" + semesterName + "');";
                    db.execSQL(query);
                    select();
                    break;
            }
        } else {
            Toast.makeText(this, "You can't add more than 8 semesters", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);
        return super.onCreateOptionsMenu(menu);
    }

    public void clearTable() {
        db.execSQL("delete from " + DatabaseHelper.TABLE_NAME);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.delete) {
            clearTable();
            select();
        }
        return super.onOptionsItemSelected(item);
    }
}

編輯：我已經解決了問題

基本上，我已經在CardView的onClick XML屬性中設置了一個方法，並在MainActivity中創建了具有必要意圖代碼的方法。

Answer 1

基本上，我已經在CardView的onClick XML屬性中設置了一個方法，並在MainActivity中創建了具有必要意圖代碼的方法。