Conversion to MVVM completed

2021-09-22 08:20:33 +02:00
parent 8b7e89f43b
commit a694246a56
6 changed files with 93 additions and 75 deletions
@@ -0,0 +1,44 @@
+package it.danieleverducci.nextcloudmaps.utils;
+
+import androidx.annotation.MainThread;
+import androidx.annotation.NonNull;
+import androidx.lifecycle.LifecycleOwner;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.Observer;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Events implementation in LiveData
+ * From: https://gist.github.com/teegarcs/319a3e7e4736a0cce8eba2216c52b0ca#file-singleliveevent
+ * @param <T>
+ */
+public class SingleLiveEvent<T> extends MutableLiveData<T> {
+    AtomicBoolean mPending = new AtomicBoolean(false);
+
+    @MainThread
+    @Override
+    public void setValue(T value) {
+        mPending.set(true);
+        super.setValue(value);
+    }
+
+    @MainThread
+    @Override
+    public void observe(@NonNull LifecycleOwner owner, @NonNull Observer<? super T> observer) {
+        super.observe(owner, new Observer<T>() {
+            @Override
+            public void onChanged(T t) {
+                if (mPending.compareAndSet(true, false)) {
+                    observer.onChanged(t);
+                }
+            }
+        });
+    }
+
+    /**
+     * Util function for Void implementations.
+     */
+    public void call() {
+        setValue(null);
+    }
+}