Using a smoother progress bar

res/layout/animated_progress_bar.xml

@@ -2,12 +2,7 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/progress_background"
     android:layout_width="match_parent"
-    android:orientation="horizontal"
-    android:layout_height="5dp">
-
-    <View
-        android:id="@android:id/progress"
-        android:layout_width="0dp"
-        android:layout_height="match_parent"/>
+    android:layout_height="5dp"
+    android:orientation="horizontal" >
 
 </LinearLayout>

src/acr/browser/lightning/AnimatedProgressBar.java

@@ -3,13 +3,14 @@ package acr.browser.lightning;
 import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Rect;
 import android.os.Bundle;
 import android.os.Parcelable;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
-import android.view.View;
 import android.view.animation.Animation;
-import android.view.animation.Animation.AnimationListener;
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.Transformation;
 import android.widget.LinearLayout;
@@ -31,13 +32,10 @@ import android.widget.LinearLayout;
  */
 public class AnimatedProgressBar extends LinearLayout {
 
-    private View mProgressView;
     private int mProgress = 0;
     private boolean mBidirectionalAnimate = true;
-    private Animation mAnimation;
-    int mInitialWidth;
-    int mDeltaWidth;
-    int mMaxWidth;
+    private int mDrawWidth = 0;
+    private int mProgressColor;
 
     public AnimatedProgressBar(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -49,11 +47,6 @@ public class AnimatedProgressBar extends LinearLayout {
         init(context, attrs);
     }
 
-    @Override
-    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-    }
-
     /**
      * Initialize the AnimatedProgressBar
      *
@@ -61,71 +54,26 @@ public class AnimatedProgressBar extends LinearLayout {
      * @param attrs   is the attribute set passed by the constructor
      */
     private void init(final Context context, AttributeSet attrs) {
-    	this.setLayerType(LAYER_TYPE_NONE, null);
+        this.setLayerType(LAYER_TYPE_HARDWARE, null);
         TypedArray array = context.getTheme().obtainStyledAttributes(attrs, R.styleable.AnimatedProgressBar, 0, 0);
         int backgroundColor;
-        int progressColor;
         try {   // Retrieve the style of the progress bar that the user hopefully set
-
-            int DEFAULT_BACKGROUND_COLOR = 0x00000000;
+            int DEFAULT_BACKGROUND_COLOR = 0x424242;
             int DEFAULT_PROGRESS_COLOR = 0x2196f3;
 
             backgroundColor = array.getColor(R.styleable.AnimatedProgressBar_backgroundColor, DEFAULT_BACKGROUND_COLOR);
-            progressColor = array.getColor(R.styleable.AnimatedProgressBar_progressColor, DEFAULT_PROGRESS_COLOR);
+            mProgressColor = array.getColor(R.styleable.AnimatedProgressBar_progressColor, DEFAULT_PROGRESS_COLOR);
             mBidirectionalAnimate = array.getBoolean(R.styleable.AnimatedProgressBar_bidirectionalAnimate, false);
-
         } finally {
-
             array.recycle();
-
         }
 
         LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         inflater.inflate(R.layout.animated_progress_bar, this, true);
 
-        mProgressView = findViewById(android.R.id.progress);
 
         this.setBackgroundColor(backgroundColor);           // set the background color for this view
-        mProgressView.setBackgroundColor(progressColor);    // set the color of the progress bar
-
-        mAnimation = new Animation() {
-            int width;
-
-            @Override
-            protected void applyTransformation(float interpolatedTime, Transformation t) {
-                width = mInitialWidth + (int) (mDeltaWidth * interpolatedTime);
-                if (width <= mMaxWidth) {
-                    mProgressView.getLayoutParams().width = width;
-                    mProgressView.requestLayout();
-                }
-            }
-
-            @Override
-            public boolean willChangeBounds() {
-                return true;
-            }
-        };
-        mAnimation.setAnimationListener(new AnimationListener(){
 
-			@Override
-			public void onAnimationStart(Animation animation) {
-			}
-
-			@Override
-			public void onAnimationEnd(Animation animation) {
-				if (mProgress >= 100) {
-                    fadeOut();
-                }
-			}
-
-			@Override
-			public void onAnimationRepeat(Animation animation) {
-			}
-        	
-        });
-        
-        mAnimation.setDuration(300);
-        mAnimation.setInterpolator(new DecelerateInterpolator());
     }
 
     /**
@@ -137,6 +85,16 @@ public class AnimatedProgressBar extends LinearLayout {
         return mProgress;
     }
 
+    private final Paint mPaint = new Paint();
+    private final Rect mRect = new Rect();
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        mPaint.setColor(mProgressColor);
+        mPaint.setStrokeWidth(10);
+        mRect.right = mRect.left + mDrawWidth;
+        canvas.drawRect(mRect, mPaint);
+    }
 
     /**
      * sets the progress as an integer value between 0 and 100.
@@ -154,29 +112,30 @@ public class AnimatedProgressBar extends LinearLayout {
             progress = 0;
         }
 
-        if (mProgressView.getAlpha() < 1.0f && progress < 100) {
+        if (this.getAlpha() < 1.0f) {
             fadeIn();
         }
 
-        final int maxWidth = this.getMeasuredWidth();           // get the maximum width the view can be
-        int initialWidth = mProgressView.getMeasuredWidth();    // get the initial width of the view
-
+        int mWidth = this.getMeasuredWidth();
+        // Set the drawing bounds for the ProgressBar
+        mRect.left = 0;
+        mRect.top = 0;
+        mRect.bottom = this.getBottom() - this.getTop();
         if (progress < mProgress && !mBidirectionalAnimate) {   // if the we only animate the view in one direction
             // then reset the view width if it is less than the
             // previous progress
-            mProgressView.getLayoutParams().width = 0;
-            mProgressView.requestLayout();
-            initialWidth = 0;
-
+            mDrawWidth = 0;
         } else if (progress == mProgress) {     // we don't need to go any farther if the progress is unchanged
+
             return;
+
         }
 
         mProgress = progress;       // save the progress
 
-        final int deltaWidth = (maxWidth * mProgress / 100) - initialWidth;     // calculate amount the width has to change
+        final int deltaWidth = (mWidth * mProgress / 100) - mDrawWidth;     // calculate amount the width has to change
 
-        animateView(initialWidth, maxWidth, deltaWidth);    // animate the width change
+        animateView(mDrawWidth, mWidth, deltaWidth);    // animate the width change
     }
 
     /**
@@ -187,18 +146,38 @@ public class AnimatedProgressBar extends LinearLayout {
      * @param deltaWidth   is the amount by which the width of the progress view will change
      */
     private void animateView(final int initialWidth, final int maxWidth, final int deltaWidth) {
-    	mInitialWidth = initialWidth;
-    	mMaxWidth = maxWidth;
-    	mDeltaWidth = deltaWidth;
-    	mAnimation.reset();
-        mProgressView.startAnimation(mAnimation);
+        Animation fill = new Animation() {
+
+            @Override
+            protected void applyTransformation(float interpolatedTime, Transformation t) {
+                int width = initialWidth + (int) (deltaWidth * interpolatedTime);
+                if (width <= maxWidth) {
+                    mDrawWidth = width;
+                    invalidate();
+                }
+                if ((1.0f - interpolatedTime) < 0.0005) {
+                    if (mProgress >= 100) {
+                        fadeOut();
+                    }
+                }
+            }
+
+            @Override
+            public boolean willChangeBounds() {
+                return false;
+            }
+        };
+
+        fill.setDuration(500);
+        fill.setInterpolator(new DecelerateInterpolator());
+        this.startAnimation(fill);
     }
 
     /**
      * fades in the progress bar
      */
     private void fadeIn() {
-        ObjectAnimator fadeIn = ObjectAnimator.ofFloat(mProgressView, "alpha", 1.0f);
+        ObjectAnimator fadeIn = ObjectAnimator.ofFloat(this, "alpha", 1.0f);
         fadeIn.setDuration(200);
         fadeIn.setInterpolator(new DecelerateInterpolator());
         fadeIn.start();
@@ -208,7 +187,7 @@ public class AnimatedProgressBar extends LinearLayout {
      * fades out the progress bar
      */
     private void fadeOut() {
-        ObjectAnimator fadeOut = ObjectAnimator.ofFloat(mProgressView, "alpha", 0.0f);
+        ObjectAnimator fadeOut = ObjectAnimator.ofFloat(this, "alpha", 0.0f);
         fadeOut.setDuration(200);
         fadeOut.setInterpolator(new DecelerateInterpolator());
         fadeOut.start();

src/acr/browser/lightning/BrowserActivity.java

@@ -2626,11 +2626,6 @@ public class BrowserActivity extends ActionBarActivity implements BrowserControl
 		}
 	}
 
-	@Override
-	public boolean isActionBarShowing() {
-		return mToolbarLayout.isShown();
-	}
-
 	// Override this, use finish() for Incognito, moveTaskToBack for Main
 	public void closeActivity() {
 		finish();

src/acr/browser/lightning/BrowserController.java

@@ -48,7 +48,6 @@ public interface BrowserController {
 
 	public void openBookmarkPage(WebView view);
 
-	public boolean isActionBarShowing();
 
 	public void closeEmptyTab();