Class to control showing and hiding of activity indicator

app/src/main/java/org/thousandsmiles/tscharts_lib/ShowProgress.java

@@ -0,0 +1,70 @@
+/*
+ * (C) Copyright Syd Logan 2021
+ * (C) Copyright Thousand Smiles Foundation 2021
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thousandsmiles.tscharts_lib;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.os.Build;
+import android.view.View;
+import android.widget.Toast;
+
+@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
+public class ShowProgress {
+    public void showProgress(final Activity activity, final View outer, final View progress, final boolean show) {
+        // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
+        // for very easy animations. If available, use these APIs to fade-in
+        // the progress spinner.
+        activity.runOnUiThread(new Runnable() {
+            public void run() {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
+                    int shortAnimTime = activity.getResources().getInteger(android.R.integer.config_shortAnimTime);
+
+                    if (outer != null) {
+                        outer.setVisibility(show ? View.GONE : View.VISIBLE);
+                        outer.animate().setDuration(shortAnimTime).alpha(
+                                show ? 0 : 1).setListener(new AnimatorListenerAdapter() {
+                            @Override
+                            public void onAnimationEnd(Animator animation) {
+                                outer.setVisibility(show ? View.GONE : View.VISIBLE);
+                            }
+                        });
+                    }
+
+                    progress.setVisibility(show ? View.VISIBLE : View.GONE);
+                    progress.animate().setDuration(shortAnimTime).alpha(
+                            show ? 1 : 0).setListener(new AnimatorListenerAdapter() {
+                        @Override
+                        public void onAnimationEnd(Animator animation) {
+                            progress.setVisibility(show ? View.VISIBLE : View.GONE);
+                        }
+                    });
+                } else {
+                    // The ViewPropertyAnimator APIs are not available, so simply show
+                    // and hide the relevant UI components.
+                    progress.setVisibility(show ? View.VISIBLE : View.GONE);
+                    if (outer != null) {
+                        outer.setVisibility(show ? View.GONE : View.VISIBLE);
+                    }
+                }
+            }
+        });
+    }
+}
+