我正在做一个示例项目作为练习,并希望在处理平板电脑(7'和10')时在同一活动中显示两个片段。
所以我到目前为止就是这样。
如您所见,我可以在左(静态)片段中显示我的recyclerview的数据。但是正确的片段是空的。
所以我有两个问题。
1)如何在右侧片段中默认显示recyclerview第一行的数据?(即图像和文章)
2)如何实现点击监听器并更新正确的片段?
这是我的代码:
MainActivity
public class MainActivity extends AppCompatActivity {
private boolean mTwoPane;
private static final String DETAIL_FRAGMENT_TAG = "DFTAG";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(findViewById(R.id.detailed_match_reports)!=null) {
mTwoPane = true;
if (savedInstanceState == null) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.detailed_match_reports, new DetailedActivityFragment(),DETAIL_FRAGMENT_TAG)
.commit();
}else{
mTwoPane = false;
}
}
}
}
布局/ activity_main.xml中
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/match_reports"
android:name="theo.testing.androidservices.fragments.MainActivityFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
tools:context="theo.testing.androidservices.activities.MainActivity"
tools:layout="@android:layout/list_content" />
布局sw600dp / activity_main
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:divider="?android:attr/dividerHorizontal"
android:orientation="horizontal"
tools:context="theo.testing.androidservices.activities.MainActivity">
<fragment
android:id="@+id/match_reports"
android:name="theo.testing.androidservices.fragments.MainActivityFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2"
tools:layout="@android:layout/list_content" />
<FrameLayout
android:id="@+id/detailed_match_reports"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="4" />
</LinearLayout>
MainActivityFragment
public class MainActivityFragment extends Fragment {
public static final String TAG = "AelApp";
public static ArrayList<MyModel> listItemsList;
RecyclerView myList;
public static MatchReportsAdapter adapter;
public MainActivityFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
updateMatchReport();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
getActivity().setTitle("Match Report");
View rootView = inflater.inflate(R.layout.fragment_main_activity, container, false);
listItemsList = new ArrayList<>();
myList = (RecyclerView)rootView.findViewById(R.id.listview_match_reports);
final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
myList.setHasFixedSize(true);
myList.setLayoutManager(linearLayoutManager);
adapter = new MatchReportsAdapter(getActivity(), listItemsList);
myList.setAdapter(adapter);
return rootView;
}
public void updateMatchReport(){
Intent i = new Intent(getActivity(), MatchReport.class);
getActivity().startService(i);
}
}
答案 0 :(得分:0)
首先让我回答第二个问题。要在屏幕右侧显示一个片段,请添加类似的内容(注意我是如何使用帧布局的id来替换片段的):
Fragment fragment = new MyRightSideFragment();
FragmentManager fm = getFragmentManager();
fm.beginTransaction().replace(R.id.detailed_match_reports, fragment).commit();
现在,对于第一个问题,您需要实现点击监听器,您可以找到示例here。
public class ReactiveAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int position = (Integer)v.getTag();
showDetail(position);
}
});
}
}
请注意,我正在使用视图的标记来标识位置(因此您必须在onBindViewHolder代码中设置此标记)。
public function showDetail(int position) {
... show fragment por position
}
最后,当您进入OnCreateView或设置代码中的某处时,请致电showDetail(0)
。