Question

我的ButterKnife库存在问题。同步gradle后我的视图停止了绑定 - 在它没有任何问题之前工作。我附上了一些代码。

build.gradle（app）

compile 'com.jakewharton:butterknife:8.6.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0'

MainActivity

public class MainActivity extends AppCompatActivity {

@BindView(R.id.navigation)
BottomNavigationView navigation;

private Fragment fragment;
private FragmentManager fragmentManager;

private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
        = new BottomNavigationView.OnNavigationItemSelectedListener() {

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case R.id.navigation_home:
                fragment = new HomeFragment();
                break;

            case R.id.navigation_dashboard:
                fragment = new GraphFragment();
                break;

            case R.id.navigation_notifications:
                fragment = new ProfileFragment();
                break;
        }

        final FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.content, fragment).commit();
        return true;
    }

};

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

    ButterKnife.setDebug(true);
    ButterKnife.bind(this);

    fragmentManager = getSupportFragmentManager();
    navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}}

ButterKnife记录

D / ButterKnife：查找绑定 com.example.azkb.instproject.refactor.MainActivity D / ButterKnife：Not 找到。尝试超类android.support.v7.app.AppCompatActivity D / ButterKnife：MISS：达到了框架类。放弃搜索。

Answer 1

当我将Kotlin添加到我的项目中时出现问题。

解决方案：

kapt'com.jakewharton：butterknife-compiler：8.7.0'

感谢downvoting：）

同步gradle后，ButterKnife不会绑定视图 - NullPointerException

1 个答案: