Android imageview id无法解析，

Posted 2023-02-04

<ImageView
        android:id="@+id/ivPopup"
        android:layout_width="wrap_content"
        android:layout_height="35dp"
        app:srcCompat="@drawable/logout"
        android:layout_marginStart="144dp"
        android:layout_alignParentTop="true"`enter code here`
        android:layout_toEndOf="@+id/tvProfileName"
        android:layout_marginTop="2dp"/>
    final ImageView ivPopup = (ImageView) findViewById(R.id.ivPopup);

由于某些原因，Android无法解析R.id.ivPopup中的ivPopup

主要活动

public class HomePage extends AppCompatActivity implements View.OnClickListener 
private static final String TAG ="Menu";
private FirebaseAuth mAuth;
private ImageView ivPopup;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home_page);
    TextView tvProfile = (TextView) findViewById(R.id.tvProfile);
    tvProfile.setOnClickListener(this);
    Button btnNotes = (Button) findViewById(R.id.btnNotes);
    btnNotes.setOnClickListener(this);
    Button btnTimeTable = (Button) findViewById(R.id.btnTimeTable);
    btnTimeTable.setOnClickListener(this);
    Button btnClass = (Button) findViewById(R.id.btnClass);
    btnClass.setOnClickListener(this);
    TextView tvProfileName = (TextView) findViewById(R.id.tvProfileName);

//捆绑包= getIntent（）。getExtras（）;//字符串user1 = extras.getString（“ username”）;

    mAuth = FirebaseAuth.getInstance();
    ivPopup = (ImageView) findViewById(R.id.ivPopup);
    ivPopup.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 
            PopupMenu popupMenu = new PopupMenu(HomePage.this,ivPopup);
            popupMenu.getMenuInflater().inflate(R.menu.menu, popupMenu.getMenu());

            popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() 
                @Override
                public boolean onMenuItemClick(MenuItem item) 
                    Toast.makeText(HomePage.this,"" + item.getTitle(), Toast.LENGTH_SHORT).show();
                    return true;
                
    );
            popupMenu.show();

答案

尝试File > Invalidate Caches / Restart。

另一答案

1. 干净代码
2. 重建代码
3. 尝试Invalidate Caches & Restart.

如果仍然无法使用，则将您的ID从ivPopup更改为XML以及JAVA中的其他名称