在 Fragment 类上实现浮动操作按钮

Question

Hi I want to add Floating Action Button on a Fragment Class, but when ever I add implements AppCompatActivity I get this error:

"getLoaderManager()' in 'android.support.v4.app.Fragment' clashes with 'getLoaderManager()' in 'android.app.Activity'; attempting to use incompatible return type"

public class home extends Fragment implements AppCompatActivity{

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.home, container, false);
    return rootView;

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

}

}

Answer 1

只需从片段中删除“implements AppCompatActivity”并将“extends AppCompatActivity”添加到包含片段的活动中。

Answer 2

我知道这个问题很老，但对于其他任何寻找这个解决方案的人来说，只需在onCreateView 的右括号之前的最后一个写返回视图。

Answer 3

you return the rootview before actually using the fab.

View rootView = inflater.inflate(R.layout.home, container, false);


    FloatingActionButton fab = (FloatingActionButton) rootView.findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

    return rootView;