Ajout projet

app/src/main/java/com/example/outilcuisson/MainActivity.java

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+package com.example.outilcuisson;
+
+import android.os.Bundle;
+
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
+import com.google.android.material.tabs.TabLayout;
+
+import androidx.viewpager.widget.ViewPager;
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+
+import com.example.outilcuisson.ui.main.SectionsPagerAdapter;
+import com.example.outilcuisson.databinding.ActivityMainBinding;
+
+public class MainActivity extends AppCompatActivity {
+
+    private ActivityMainBinding binding;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        binding = ActivityMainBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+
+        SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(
+            this, getSupportFragmentManager());
+        ViewPager viewPager = binding.viewPager;
+        viewPager.setAdapter(sectionsPagerAdapter);
+        TabLayout tabs = binding.tabs;
+        tabs.setupWithViewPager(viewPager);
+        FloatingActionButton fab = binding.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();
+            }
+        });
+    }
+}

app/src/main/java/com/example/outilcuisson/ui/main/PageViewModel.java

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+package com.example.outilcuisson.ui.main;
+
+import androidx.arch.core.util.Function;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.Transformations;
+import androidx.lifecycle.ViewModel;
+
+public class PageViewModel extends ViewModel {
+
+    private MutableLiveData<Integer> mIndex = new MutableLiveData<>();
+    private LiveData<String> mText = Transformations.map(mIndex, new Function<Integer, String>() {
+        @Override
+        public String apply(Integer input) {
+            return "Hello world from section: " + input;
+        }
+    });
+
+    public void setIndex(int index) {
+        mIndex.setValue(index);
+    }
+
+    public LiveData<String> getText() {
+        return mText;
+    }
+}

app/src/main/java/com/example/outilcuisson/ui/main/PlaceholderFragment.java

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+package com.example.outilcuisson.ui.main;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+
+import com.example.outilcuisson.R;
+import com.example.outilcuisson.databinding.FragmentMainBinding;
+
+/**
+ * A placeholder fragment containing a simple view.
+ */
+public class PlaceholderFragment extends Fragment {
+
+    private static final String ARG_SECTION_NUMBER = "section_number";
+
+    private PageViewModel pageViewModel;
+    private FragmentMainBinding binding;
+
+    public static PlaceholderFragment newInstance(int index) {
+        PlaceholderFragment fragment = new PlaceholderFragment();
+        Bundle bundle = new Bundle();
+        bundle.putInt(ARG_SECTION_NUMBER, index);
+        fragment.setArguments(bundle);
+        return fragment;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        pageViewModel = new ViewModelProvider(this).get(PageViewModel.class);
+        int index = 1;
+        if (getArguments() != null) {
+            index = getArguments().getInt(ARG_SECTION_NUMBER);
+        }
+        pageViewModel.setIndex(index);
+    }
+
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater,
+                             ViewGroup container,
+                             Bundle savedInstanceState) {
+
+        binding = FragmentMainBinding.inflate(inflater, container, false);
+        View root = binding.getRoot();
+
+        final TextView textView = binding.sectionLabel;
+        pageViewModel.getText().observe(getViewLifecycleOwner(), new Observer<String>() {
+            @Override
+            public void onChanged(@Nullable String s) {
+                textView.setText(s);
+            }
+        });
+        return root;
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+}

app/src/main/java/com/example/outilcuisson/ui/main/SectionsPagerAdapter.java

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+package com.example.outilcuisson.ui.main;
+
+import android.content.Context;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentPagerAdapter;
+
+import com.example.outilcuisson.R;
+
+/**
+ * A [FragmentPagerAdapter] that returns a fragment corresponding to
+ * one of the sections/tabs/pages.
+ */
+public class SectionsPagerAdapter extends FragmentPagerAdapter {
+
+    @StringRes
+    private static final int[] TAB_TITLES = new int[]{
+        R.string.tab_text_1, R.string.tab_text_2
+    };
+    private final Context mContext;
+
+    public SectionsPagerAdapter(Context context, FragmentManager fm) {
+        super(fm);
+        mContext = context;
+    }
+
+    @Override
+    public Fragment getItem(int position) {
+        // getItem is called to instantiate the fragment for the given page.
+        // Return a PlaceholderFragment (defined as a static inner class below).
+        return PlaceholderFragment.newInstance(position + 1);
+    }
+
+    @Nullable
+    @Override
+    public CharSequence getPageTitle(int position) {
+        return mContext.getResources().getString(TAB_TITLES[position]);
+    }
+
+    @Override
+    public int getCount() {
+        // Show 2 total pages.
+        return 2;
+    }
+}