Question

我创建了一个基于列表的应用程序。除了我的代码提供有关R.id引用的错误之外，一切似乎都正常工作。请帮帮我!!它是唯一一个给出错误的点，如无法解决或不是一个字段

下面的

是 mainactivity.java

的一部分

@Override 
   public boolean onOptionsItemSelected(MenuItem item) 
   { 
      super.onOptionsItemSelected(item); 
      switch(item.getItemId()) 
      { 
         case R.id.item1:
            Bundle dataBundle = new Bundle();
            dataBundle.putInt("id", 0);
            Intent intent = new Intent(getApplicationContext(),com.example.addressbook.DisplayContact.class);
            intent.putExtras(dataBundle);
            startActivity(intent);
            return true; 
         default: 
            return super.onOptionsItemSelected(item); 

       }

第二个错误发生在 displaycontact.java

中

public boolean onOptionsItemSelected(MenuItem item) 
   { 
      super.onOptionsItemSelected(item); 
      switch(item.getItemId()) 
   { 
      case R.id.Edit_Contact: 
      Button b = (Button)findViewById(R.id.button1);
      b.setVisibility(View.VISIBLE);
      name.setEnabled(true);
      name.setFocusableInTouchMode(true);
      name.setClickable(true);

      phone.setEnabled(true);
      phone.setFocusableInTouchMode(true);
      phone.setClickable(true);

      email.setEnabled(true);
      email.setFocusableInTouchMode(true);
      email.setClickable(true);

      street.setEnabled(true);
      street.setFocusableInTouchMode(true);
      street.setClickable(true);

      place.setEnabled(true);
      place.setFocusableInTouchMode(true);
      place.setClickable(true);

      return true; 
      case R.id.Delete_Contact:

      AlertDialog.Builder builder = new AlertDialog.Builder(this);
      builder.setMessage(R.string.deleteContact)
     .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface dialog, int id) {
            mydb.deleteContact(id_To_Update);
            Toast.makeText(getApplicationContext(), "Deleted Successfully", Toast.LENGTH_SHORT).show();  
            Intent intent = new Intent(getApplicationContext(),com.example.addressbook.MainActivity.class);
            startActivity(intent);
         }
      })

虽然我已经在xml文件中声明了上述ID，

mainmenu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
   <item android:id="@+id/item1" 
      android:icon="@drawable/add"
      android:title="@string/Add_New" 
      android:showAsAction="ifRoom|withText">
   </item>
</menu>

display_contact.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/Edit_Contact"
        android:orderInCategory="100"
        android:title="@string/edit" />

   <item
      android:id="@+id/Delete_Contact"
      android:orderInCategory="100"
      android:title="@string/delete"/>

</menu>

请帮帮我

R.id引用中的错误

0 个答案: