Added a contentLoadingSmoothProgressBar

Author: castorflex

CHANGELOG.md

@@ -1,3 +1,7 @@
+##0.3.3
+
+-   Added a ContentLoadingSmoothProgressBar (see also [ContentLoadingProgressBar](https://android.googlesource.com/platform/frameworks/support/+/refs/heads/master/v4/java/android/support/v4/widget/ContentLoadingProgressBar.java))
+
 ##0.3.2
 
 -   targetSdkVersion is now 14. We just need holo style.

gradle.properties

@@ -1,5 +1,5 @@
-VERSION_NAME=0.3.2
-VERSION_CODE=9
+VERSION_NAME=0.3.3
+VERSION_CODE=10
 GROUP=com.github.castorflex.smoothprogressbar
 
 #storeFile=nice try

library/src/main/java/fr/castorflex/android/smoothprogressbar/ContentLoadingSmoothProgressBar.java

@@ -0,0 +1,110 @@
+package fr.castorflex.android.smoothprogressbar;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * This is a copy of the ContentLoadingProgressBar from the support library, but extends
+ * SmoothProgressBar.
+ */
+public class ContentLoadingSmoothProgressBar extends SmoothProgressBar {
+
+  private static final int MIN_SHOW_TIME = 500; // ms
+  private static final int MIN_DELAY = 500; // ms
+
+  private long mStartTime = -1;
+
+  private boolean mPostedHide = false;
+
+  private boolean mPostedShow = false;
+
+  private boolean mDismissed = false;
+
+  private final Runnable mDelayedHide = new Runnable() {
+
+    @Override
+    public void run() {
+      mPostedHide = false;
+      mStartTime = -1;
+      setVisibility(View.GONE);
+    }
+  };
+
+  private final Runnable mDelayedShow = new Runnable() {
+
+    @Override
+    public void run() {
+      mPostedShow = false;
+      if (!mDismissed) {
+        mStartTime = System.currentTimeMillis();
+        setVisibility(View.VISIBLE);
+      }
+    }
+  };
+
+  public ContentLoadingSmoothProgressBar(Context context) {
+    this(context, null);
+  }
+
+  public ContentLoadingSmoothProgressBar(Context context, AttributeSet attrs) {
+    super(context, attrs, 0);
+  }
+
+  @Override
+  public void onAttachedToWindow() {
+    super.onAttachedToWindow();
+    removeCallbacks();
+  }
+
+  @Override
+  public void onDetachedFromWindow() {
+    super.onDetachedFromWindow();
+    removeCallbacks();
+  }
+
+  private void removeCallbacks() {
+    removeCallbacks(mDelayedHide);
+    removeCallbacks(mDelayedShow);
+  }
+
+  /**
+   * Hide the progress view if it is visible. The progress view will not be
+   * hidden until it has been shown for at least a minimum show time. If the
+   * progress view was not yet visible, cancels showing the progress view.
+   */
+  public void hide() {
+    mDismissed = true;
+    removeCallbacks(mDelayedShow);
+    long diff = System.currentTimeMillis() - mStartTime;
+    if (diff >= MIN_SHOW_TIME || mStartTime == -1) {
+      // The progress spinner has been shown long enough
+      // OR was not shown yet. If it wasn't shown yet,
+      // it will just never be shown.
+      setVisibility(View.GONE);
+    } else {
+      // The progress spinner is shown, but not long enough,
+      // so put a delayed message in to hide it when its been
+      // shown long enough.
+      if (!mPostedHide) {
+        postDelayed(mDelayedHide, MIN_SHOW_TIME - diff);
+        mPostedHide = true;
+      }
+    }
+  }
+
+  /**
+   * Show the progress view after waiting for a minimum delay. If
+   * during that time, hide() is called, the view is never made visible.
+   */
+  public void show() {
+    // Reset the start time.
+    mStartTime = -1;
+    mDismissed = false;
+    removeCallbacks(mDelayedHide);
+    if (!mPostedShow) {
+      postDelayed(mDelayedShow, MIN_DELAY);
+      mPostedShow = true;
+    }
+  }
+}