android - ListView 中的 OnItemClickListener() 不起作用

Question

这是我用来填充 a 的ListView代码SimpleCursorAdapter。但我无法onClick在这段代码中实现监听器。实际上，代码可以正常工作而没有错误，但是单击项目时我没有得到任何输出...

public class Senditems extends Activity implements OnItemClickListener
{
    TextView output;
    DataHelper dh;
    ListView empListView;

    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sendto);

        Table1 employeeTable = new Table1(this);    
        employeeTable.open();
        Cursor c = employeeTable.fetchAllEmployee();
        if (c!= null)
        {
            SimpleCursorAdapter adapter2 = new SimpleCursorAdapter(this,
                R.layout.sendto,c, 
                new String[] {c.getColumnName(1),c.getColumnName(2)}, 
                new int[] {R.id.EmployeeName, R.id.EmployeeDesignation});
            empListView = (ListView)findViewById(R.id.Employee);
            empListView.setAdapter(adapter2);
            empListView.setOnItemClickListener(new OnItemClickListener() {
                public void onItemClick(AdapterView<?> parent, View view, int position, long id)                
                {
                    Toast.makeText(getApplicationContext(), "1 item clicked ",  Toast.LENGTH_SHORT).show();
                }
            });
       }

       employeeTable.close();
    }

    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) 
    {
        // TODO Auto-generated method stub      
    }
}

score 3 · Accepted Answer

看起来android:inputType可能会导致这个问题，即使你使用TextView. android:inputType我有同样的问题，从s 中删除属性TextView解决了这个问题。

score 1 · Accepted Answer

嗨，varada，我正在使用您的代码，我暗示您的代码运行良好，您的代码中进行了以下更改

请在您的表中提供 _id 主键字段。

并使用此代码，它工作正常，并在项目点击时给出 toast 中的位置

public class MainActivity extends Activity implements OnItemClickListener
{
    TextView output;
    ListView empListView;

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

        SimpleCursorAdapter adapter2=null;
        try {
            Table1 employeeTable = new Table1(this);    
            employeeTable.open();
            try {
                 // employeeTable.insert("Ankit", "Name");
            } catch (Exception e) {
                // TODO: handle exception
                e.printStackTrace();
            }



            Cursor c = employeeTable.fetchAllEmployee();
            if (c!= null)
            {
                 adapter2 = new SimpleCursorAdapter(this,
                    R.layout.sendto,c, 
                    new String[] {c.getColumnName(1),c.getColumnName(2)}, 
                    new int[] {R.id.EmployeeName, R.id.EmployeeDesignation});

           }



           employeeTable.close();
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();

        }
        empListView = (ListView)findViewById(R.id.Employee);
        empListView.setAdapter(adapter2);
        empListView.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view, int position, long id)                
            {
                Toast.makeText(getApplicationContext(), "position"+position,  Toast.LENGTH_SHORT).show();
            }
        });
    }

    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) 
    {
        // TODO Auto-generated method stub      
    }
}``

3-sendto.xml

<TextView
    android:id="@+id/EmployeeName"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TextView" />

<TextView
    android:id="@+id/EmployeeDesignation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TextView" />

score 0 · Accepted Answer

我也面临同样的问题。我把它改成了OnClickListner.

rowView.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        //give ur code here
    }
});

这里rowView对应于ListView.

score 0 · Accepted Answer

它发生在实际视图由于您的行文件中的其他视图而没有获得焦点时，请检查我已经在这里回答过，可能会有所帮助。

score 0 · Accepted Answer

如果您正在实现OnItemClickListenerandonItemClick是自动生成的，您应该在其中编写操作：

public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
    // TODO Auto-generated method stub
    if (view.equals(empListView))
    {
        Toast.makeText(getApplicationContext(),"1 item clicked ", Toast.LENGTH_SHORT).show();
    }  
}

并且还包括empListView.setOnItemClickListener(this);

android - ListView 中的 OnItemClickListener() 不起作用

5 回答 5

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