Question

我有一个带有FrameLayout的基本片段，我想在派生的片段中使用这个布局，并为它添加一个onTouchListener。

BaseFragment.java

public class BaseFragment extends Fragment {

    protected FrameLayout baseFrameLayout;
    protected View baseView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        super.onCreateView(inflater, container, savedInstanceState);

        baseView = inflater.inflate(R.layout.fragment_base, container, false);

        baseFrameLayout = (FrameLayout) baseView.findViewById(R.id.frameLayout);

        return baseView;
    }
}

fragment_base.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/frameLayout"
    android:clickable="true" 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

DerivedFragment.java

public class DerivedFragment extends BaseFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        super.onCreateView(inflater, container, savedInstanceState);

        baseFrameLayout.setOnTouchListener(new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                // do something
                return true;
            }
        });

        return baseView;
    }
}

不幸的是，当我触摸FrameLayout

时，没有执行onTouchListener

修改

最后，我以这种方式将DerivedFragment添加到另一个Fragment：

OverViewFragment.java

public class OverViewFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        super.onCreateView(inflater, container, savedInstanceState);
        View view = inflater.inflate(R.layout.fragment_overView, container, false);

        Fragment derivedFragment = new DerivedFragment();
        FragmentTransaction devTrans = getChildFragmentManager().beginTransaction();
        devTrans.add(R.id.derivedFragmentId, derivedFragment).commit();

        Fragment footerFragment = new FooterFragment();
        FragmentTransaction statTrans = getChildFragmentManager().beginTransaction();
        statTrans.add(R.id.footerFragmentId, footerFragment).commit();

        return view;
    }
}

fragment_overView.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<FrameLayout
    android:id="@+id/derivedFragmentId"
    android:layout_above="@+id/footerFragmentId"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:layout_centerVertical="true"
    android:gravity="center" 
    />

<FrameLayout
    android:id="@+id/footerFragmentId"
    android:layout_alignParentBottom="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    />

</RelativeLayout>

Answer 1

我之前从未使用过空的布局。所以我只是测试了它。

使用以下行，布局不可见且不会获得点击次数：

<FrameLayout
    android:id="@+id/frameLayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

以下几行有效：

<FrameLayout
    android:id="@+id/frameLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />

因此，要么制作布局match_parent，要么在里面添加视图。

使用基础片段的视图/布局

1 个答案: