feat(dots): notification count support for launcher3 app badges (be47c1fd) · Commits · e / os / android_frameworks_libs_systemui

iconloaderlib/src/com/android/launcher3/icons/DotRenderer.java

+63 −4

Original line number	Diff line number	Diff line
		@@ -27,9 +27,12 @@ import android.graphics.Path;
		import android.graphics.PathMeasure;
		import android.graphics.Rect;
		import android.graphics.RectF;
		import android.graphics.Typeface;
		import android.util.Log;
		import android.view.ViewDebug;

		import androidx.core.graphics.ColorUtils;

		/**
		* Used to draw a notification dot on top of an icon.
		*/
		@@ -38,10 +41,15 @@ public class DotRenderer {
		private static final String TAG = "DotRenderer";

		// The dot size is defined as a percentage of the app icon size.
		private static final float SIZE_PERCENTAGE = 0.228f;
		private static final float SIZE_PERCENTAGE = 0.21f;
		private static final float SIZE_PERCENTAGE_WITH_COUNT = 0.28f;

		// The max number to draw on dots
		private static final int MAX_COUNT = 99;

		private final float mCircleRadius;
		private final Paint mCirclePaint = new Paint(ANTI_ALIAS_FLAG \| FILTER_BITMAP_FLAG);
		private final Paint mTextPaint = new Paint(ANTI_ALIAS_FLAG \| FILTER_BITMAP_FLAG);

		private final Bitmap mBackgroundWithShadow;
		private final float mBitmapOffset;
		@@ -51,8 +59,12 @@ public class DotRenderer {
		private final float[] mLeftDotPosition;

		private static final int MIN_DOT_SIZE = 1;
		public DotRenderer(int iconSizePx, Path iconShapePath, int pathSize) {
		int size = Math.round(SIZE_PERCENTAGE * iconSizePx);
		private final Rect mTextRect = new Rect();
		private final boolean mDisplayCount;

		public DotRenderer(int iconSizePx, Path iconShapePath, int pathSize, Boolean displayCount, Typeface typeface) {
		mDisplayCount = displayCount;
		int size = Math.round((displayCount ? SIZE_PERCENTAGE_WITH_COUNT : SIZE_PERCENTAGE) * iconSizePx);
		if (size <= 0) {
		size = MIN_DOT_SIZE;
		}
		@@ -66,6 +78,10 @@ public class DotRenderer {
		// Find the points on the path that are closest to the top left and right corners.
		mLeftDotPosition = getPathPoint(iconShapePath, pathSize, -1);
		mRightDotPosition = getPathPoint(iconShapePath, pathSize, 1);

		mTextPaint.setTextSize(size * 0.65f);
		mTextPaint.setTextAlign(Paint.Align.LEFT);
		mTextPaint.setTypeface(typeface);
		}

		private static float[] getPathPoint(Path path, float size, float direction) {
		@@ -100,7 +116,7 @@ public class DotRenderer {
		/**
		* Draw a circle on top of the canvas according to the given params.
		*/
		public void draw(Canvas canvas, DrawParams params) {
		public void draw(Canvas canvas, DrawParams params, int numNotifications) {
		if (params == null) {
		Log.e(TAG, "Invalid null argument(s) passed in call to draw.");
		return;
		@@ -127,9 +143,30 @@ public class DotRenderer {
		canvas.drawBitmap(mBackgroundWithShadow, mBitmapOffset, mBitmapOffset, mCirclePaint);
		mCirclePaint.setColor(params.dotColor);
		canvas.drawCircle(0, 0, mCircleRadius, mCirclePaint);

		if (mDisplayCount && numNotifications > 0) {
		// Draw the numNotifications text
		mTextPaint.setColor(getCounterTextColor(Color.WHITE));
		String text = String.valueOf(Math.min(numNotifications, MAX_COUNT));
		mTextPaint.getTextBounds(text, 0, text.length(), mTextRect);
		float x = (-mTextRect.width() / 2f - mTextRect.left) * getAdjustment(numNotifications);
		float y = mTextRect.height() / 2f - mTextRect.bottom;
		canvas.drawText(text, x, y, mTextPaint);
		}

		canvas.restore();
		}

		/**
		* Returns the color to use for the counter text based on the dot's background color.
		*
		* @param dotBackgroundColor The color of the dot background.
		* @return The color to use on the counter text.
		*/
		private int getCounterTextColor(int dotBackgroundColor) {
		return ColorUtils.setAlphaComponent(dotBackgroundColor, 0xFF);
		}

		public static class DrawParams {
		/** The color (possibly based on the icon) to use for the dot. */
		@ViewDebug.ExportedProperty(category = "notification dot", formatToHexString = true)
		@@ -147,4 +184,26 @@ public class DotRenderer {
		@ViewDebug.ExportedProperty(category = "notification dot")
		public boolean leftAlign;
		}

		/**
		* An attempt to adjust digits to their perceived center, they were tuned with Roboto but should
		* (hopefully) work with other OEM fonts as well.
		*/
		private float getAdjustment(int number) {
		switch (number) {
		case 1:
		return 1.01f;
		case 2:
		return 0.99f;
		case 3:
		case 4:
		case 6:
		return 0.98f;
		case 7:
		return 1.02f;
		case 9:
		return 0.9f;
		}
		return 1f;
		}
		}