Merge pull request #1003 from Xterisk/master

#4 #11 第4次实验及实验报告

students/net1814080903211/AndroidManifest.xml

@@ -21,8 +21,6 @@
             </intent-filter>
         </activity>
 
-        <activity android:name=".ProfileActivity" />
-        <activity android:name=".BrowseActivity" />
     </application>
 
 </manifest>

students/net1814080903211/ChatObject.java

@@ -0,0 +1,41 @@
+package edu.hzuapps.androidlabs.net1814080903211.components;
+
+import androidx.annotation.Nullable;
+
+public class ChatObject {
+    String name;
+    String type;
+    @Nullable
+    String extraInfo;
+
+    public ChatObject(String name, String type, @Nullable String extraInfo) {
+        this.name = name;
+        this.type = type;
+        this.extraInfo = extraInfo;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    @Nullable
+    public String getExtraInfo() {
+        return extraInfo;
+    }
+
+    public void setExtraInfo(@Nullable String extraInfo) {
+        this.extraInfo = extraInfo;
+    }
+}

students/net1814080903211/HomeFragment.java

@@ -0,0 +1,102 @@
+package edu.hzuapps.androidlabs.net1814080903211.ui.home;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+
+import edu.hzuapps.androidlabs.net1814080903211.components.ListSeparator;
+import edu.hzuapps.androidlabs.net1814080903211.databinding.FragmentHomeBinding;
+import edu.hzuapps.androidlabs.net1814080903211.components.ChatObject;
+import edu.hzuapps.androidlabs.net1814080903211.databinding.ChatListItemBinding;
+
+
+class ChatListAdapter extends RecyclerView.Adapter<ChatListAdapter.ChatListItemHolder> {
+    private final ArrayList<ChatObject> objectList;
+
+    public ChatListAdapter(ArrayList<ChatObject> list) {
+        super();
+        objectList = list;
+    }
+
+    static class ChatListItemHolder extends RecyclerView.ViewHolder {
+        private final ChatListItemBinding binding;
+
+        public ChatListItemHolder(@NonNull @NotNull ChatListItemBinding binding) {
+            super(binding.getRoot());
+
+            this.binding = binding;
+        }
+
+        public void setBinding(ChatObject object) {
+            binding.setObject(object);
+            binding.executePendingBindings();
+        }
+    }
+
+    @NonNull
+    @NotNull
+    @Override
+    public ChatListItemHolder onCreateViewHolder(@NonNull @NotNull ViewGroup viewGroup, int i) {
+        LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
+        ChatListItemBinding binding = ChatListItemBinding.inflate(inflater, viewGroup, false);
+        return new ChatListItemHolder(binding);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull @NotNull ChatListItemHolder chatListItemHolder, int i) {
+        chatListItemHolder.setBinding(objectList.get(i));
+    }
+
+    @Override
+    public int getItemCount() {
+        return objectList.size();
+    }
+}
+
+public class HomeFragment extends Fragment {
+
+    private FragmentHomeBinding binding;
+
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             ViewGroup container, Bundle savedInstanceState) {
+        HomeViewModel homeViewModel = new ViewModelProvider(this).get(HomeViewModel.class);
+
+        binding = FragmentHomeBinding.inflate(inflater, container, false);
+        View root = binding.getRoot();
+
+        RecyclerView recyclerView = binding.chatList;
+        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
+        recyclerView.setLayoutManager(layoutManager);
+        recyclerView.addItemDecoration(new ListSeparator());
+
+        homeViewModel.getChatObjects().observe(getViewLifecycleOwner(),
+                new Observer<ArrayList<ChatObject>>() {
+                    @Override
+                    public void onChanged(@Nullable ArrayList<ChatObject> s) {
+                        ChatListAdapter adapter = new ChatListAdapter(s);
+                        recyclerView.setAdapter(adapter);
+                    }
+                });
+        return root;
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+}

students/net1814080903211/HomeViewModel.java

@@ -0,0 +1,37 @@
+package edu.hzuapps.androidlabs.net1814080903211.ui.home;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import edu.hzuapps.androidlabs.net1814080903211.components.ChatObject;
+
+public class HomeViewModel extends ViewModel {
+
+    private final MutableLiveData<ArrayList<ChatObject>> mChatObjects;
+
+    public HomeViewModel() {
+        mChatObjects = new MutableLiveData<>();
+        ChatObject[] raw_list = new ChatObject[]{
+                new ChatObject("Test Item Person", "Person", "昨天晚上你去哪里了？"),
+                new ChatObject("Test Item Room", "Room", "这家店还行吧。"),
+                new ChatObject("Test Person 2", "Person", null),
+                new ChatObject("Test Person 3", "Person", null),
+                new ChatObject("Test Room 2", "Room", "今天有个通知"),
+                new ChatObject("Test Room 3", "Room", null),
+                new ChatObject("Test Person 4", "Person", null),
+                new ChatObject("Test Room 4", "Room", "有没有你感兴趣的？"),
+                new ChatObject("Test Person 5", "Person", null),
+        };
+        ArrayList<ChatObject> list = new ArrayList<>(Arrays.asList(raw_list));
+
+        mChatObjects.setValue(list);
+    }
+
+    public LiveData<ArrayList<ChatObject>> getChatObjects() {
+        return mChatObjects;
+    }
+}

students/net1814080903211/ListSeparator.java

@@ -0,0 +1,30 @@
+package edu.hzuapps.androidlabs.net1814080903211.components;
+
+import android.graphics.Rect;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import org.jetbrains.annotations.NotNull;
+
+public class ListSeparator extends RecyclerView.ItemDecoration {
+
+    private static int margin = 12;
+
+    @Override
+    public void getItemOffsets(@NonNull @NotNull Rect outRect, @NonNull @NotNull View view,
+                               @NonNull @NotNull RecyclerView parent, @NonNull @NotNull RecyclerView.State state) {
+        super.getItemOffsets(outRect, view, parent, state);
+
+        final float scale = parent.getResources().getDisplayMetrics().density;
+        final int margin_dp = (int) (margin * scale + 0.5f);
+
+        if (parent.getChildLayoutPosition(view) == 0) {
+            outRect.top = margin_dp;
+        }
+        outRect.bottom = margin_dp;
+        outRect.left = margin_dp;
+        outRect.right = margin_dp;
+    }
+}

students/net1814080903211/Net1814080903211Activity.java

@@ -1,12 +1,8 @@
 package edu.hzuapps.androidlabs.net1814080903211;
 
-import android.content.Intent;
 import android.os.Bundle;
-import android.view.View;
 import android.view.Menu;
-import android.widget.Button;
 
-import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.navigation.NavigationView;
 
 import androidx.navigation.NavController;
@@ -21,13 +17,12 @@
 public class Net1814080903211Activity extends AppCompatActivity {
 
     private AppBarConfiguration mAppBarConfiguration;
-    private ActivityMainBinding binding;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        binding = ActivityMainBinding.inflate(getLayoutInflater());
+        ActivityMainBinding binding = ActivityMainBinding.inflate(getLayoutInflater());
         setContentView(binding.getRoot());
 
         setSupportActionBar(binding.appBarMain.toolbar);
@@ -36,8 +31,8 @@ protected void onCreate(Bundle savedInstanceState) {
         // Passing each menu ID as a set of Ids because each
         // menu should be considered as top level destinations.
         mAppBarConfiguration = new AppBarConfiguration.Builder(
-                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow)
-                .setDrawerLayout(drawer)
+                R.id.nav_home, R.id.nav_search, R.id.nav_profile)
+                .setOpenableLayout(drawer)
                 .build();
         NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main);
         NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
@@ -51,18 +46,6 @@ public boolean onCreateOptionsMenu(Menu menu) {
         return true;
     }
 
-    public void jumpToProfile(View v)
-    {
-        Intent newActivity = new Intent(this, ProfileActivity.class);
-        startActivity(newActivity);
-    }
-
-    public void jumpToBrowse(View v)
-    {
-        Intent newActivity = new Intent(this, BrowseActivity.class);
-        startActivity(newActivity);
-    }
-
     @Override
     public boolean onSupportNavigateUp() {
         NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main);

students/net1814080903211/ProfileFragment.java

@@ -0,0 +1,60 @@
+package edu.hzuapps.androidlabs.net1814080903211.ui.profile;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.Spinner;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.hzuapps.androidlabs.net1814080903211.R;
+import edu.hzuapps.androidlabs.net1814080903211.databinding.FragmentProfileBinding;
+
+public class ProfileFragment extends Fragment {
+
+    private FragmentProfileBinding binding;
+
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             ViewGroup container, Bundle savedInstanceState) {
+        ProfileViewModel profileViewModel = new ViewModelProvider(this).get(ProfileViewModel.class);
+
+        binding = FragmentProfileBinding.inflate(inflater, container, false);
+        View root = binding.getRoot();
+
+        Spinner sex_spinner = binding.sexualSpinner;
+        // Create an ArrayAdapter using the string array and a default spinner layout
+        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(root.getContext(),
+                R.array.profile_sexual_selections, android.R.layout.simple_spinner_item);
+        // Specify the layout to use when the list of choices appears
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        // Apply the adapter to the spinner
+        sex_spinner.setAdapter(adapter);
+
+        Spinner age_spinner = binding.ageSpinner;
+        ArrayList<Integer> ages = new ArrayList<>();
+        for (int i = 1; i < 101; i++) {
+            ages.add(i);
+        }
+        ArrayAdapter<Integer> age_adapter = new ArrayAdapter<>(root.getContext(),
+                android.R.layout.simple_spinner_item, ages);
+        age_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        age_spinner.setAdapter(age_adapter);
+        return root;
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+}

students/net1814080903211/ProfileViewModel.java

@@ -0,0 +1,19 @@
+package edu.hzuapps.androidlabs.net1814080903211.ui.profile;
+
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+public class ProfileViewModel extends ViewModel {
+
+    private MutableLiveData<String> mText;
+
+    public ProfileViewModel() {
+        mText = new MutableLiveData<>();
+        mText.setValue("This is slideshow fragment");
+    }
+
+    public LiveData<String> getText() {
+        return mText;
+    }
+}