Fixed bugs [working perfectly]

Author: praveen

app/src/main/java/com/geeks4ever/counter_app/model/repository/CountRepository.java

@@ -8,11 +8,12 @@
 public class CountRepository {
 
     public static CountRepository repository;
-    private CountModel countModel;
+    private final CountModel countModel;
 
     final MutableLiveData<CountModel> data = new MutableLiveData<>();
 
     private CountRepository(){
+        countModel = new CountModel();
         countModel.setCount("0");
     }
 

app/src/main/java/com/geeks4ever/counter_app/view/HomeScreen.java

@@ -6,12 +6,13 @@
 import androidx.lifecycle.Observer;
 
 import android.os.Bundle;
+import android.view.View;
 
 import com.geeks4ever.counter_app.R;
 import com.geeks4ever.counter_app.databinding.HomeScreenBinding;
 import com.geeks4ever.counter_app.viewmodel.CounterViewModel;
 
-public class HomeScreen extends AppCompatActivity {
+public class HomeScreen extends AppCompatActivity implements Listener {
 
     private CounterViewModel viewModel;
     private LiveData<String> count;
@@ -23,6 +24,10 @@ protected void onCreate(Bundle savedInstanceState) {
         HomeScreenBinding binding = DataBindingUtil.setContentView(this, R.layout.home_screen);
         binding.setCount("0");
 
+        binding.setListeners(this);
+
+        viewModel = new CounterViewModel(getApplication());
+
         count = viewModel.getCount();
 
         count.observe(this, new Observer<String>() {
@@ -33,4 +38,9 @@ public void onChanged(String s) {
         });
 
     }
+
+    @Override
+    public void onClick(View view) {
+        viewModel.IncrementCount();
+    }
 }

app/src/main/java/com/geeks4ever/counter_app/view/Listener.java

@@ -0,0 +1,8 @@
+package com.geeks4ever.counter_app.view;
+
+import android.view.View;
+
+public interface Listener {
+
+    void onClick(View view);
+}

app/src/main/java/com/geeks4ever/counter_app/viewmodel/CounterViewModel.java

@@ -25,7 +25,7 @@ public CounterViewModel(@NonNull Application application) {
 
         countRepository = CountRepository.getInstance();
         data = countRepository.getCount();
-        data.observe(getApplication(), new Observer<CountModel>() {
+        data.observeForever( new Observer<CountModel>() {
             @Override
             public void onChanged(CountModel countModel) {
                 count.setValue(countModel.getCount());

app/src/main/res/layout/home_screen.xml

@@ -9,6 +9,10 @@
             name="count"
             type="String" />
 
+        <variable
+            name="listeners"
+            type="com.geeks4ever.counter_app.view.Listener" />
+
     </data>
 
     <androidx.constraintlayout.widget.ConstraintLayout
@@ -43,6 +47,7 @@
             app:layout_constraintRight_toRightOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"
             android:foreground="@drawable/add_icon"
+            android:onClick="@{listeners::onClick}"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"/>