1.概述
在对11.0产品开发中，对于Launcher3做各种定制化开发，也是常见的，最近有功能需求要求，对于修改图标的形状为圆角图标，而在Launcher3中，所有的app和hotseat 都是由BubbleTextView负责构建的，所以对于图标的修改也是要从BubbleTextView.java修改的
在这里插入图片描述
2.修改Launcher3 app hotseat 图标形状为圆角图标的相关类
/package/app/Launcher3/src/com/android/launcher3/BubbleTextView.java
/packages/apps/Launcher3/src/com/android/launcher3/FastBitmapDrawable.java3.修改Launcher3 app hotseat 图标形状为圆角图标的相关功能分析和实现
3.1看BubbleTextView.java 源码关于图标的绑定
/package/app/Launcher3/src/com/android/launcher3/BubbleTextView.java
public class BubbleTextView extends TextView implements ItemInfoUpdateReceiver, OnResumeCallback,
IconLabelDotView, DraggableView, Reorderable {
private static final int DISPLAY_WORKSPACE = 0;
private static final int DISPLAY_ALL_APPS = 1;
private static final int DISPLAY_FOLDER = 2;
private static final int[] STATE_PRESSED = new int[] {android.R.attr.state_pressed};
public void applyFromWorkspaceItem(WorkspaceItemInfo info) {
applyFromWorkspaceItem(info, false);
}
public void applyFromWorkspaceItem(WorkspaceItemInfo info, boolean promiseStateChanged) {
applyIconAndLabel(info);
setTag(info);
if (promiseStateChanged || (info.hasPromiseIconUi())) {
applyPromiseState(promiseStateChanged);
}
applyDotState(info, false /* animate */);
}
public void applyFromApplicationInfo(AppInfo info) {
applyIconAndLabel(info);
// We don't need to check the info since it's not a WorkspaceItemInfo
super.setTag(info);
// Verify high res immediately
verifyHighRes();
if (info instanceof PromiseAppInfo) {
PromiseAppInfo promiseAppInfo = (PromiseAppInfo) info;
applyProgressLevel(promiseAppInfo.level);
}
applyDotState(info, false /* animate */);
}
@UiThread protected void applyIconAndLabel(ItemInfoWithIcon info) { boolean useTheme = mDisplay == DISPLAY_WORKSPACE || mDisplay == DISPLAY_FOLDER || mDisplay == DISPLAY_TASKBAR; FastBitmapDrawable iconDrawable = info.newIcon(getContext(), useTheme); mDotParams.color = IconPalette.getMutedColor(iconDrawable.getIconColor(), 0.54f); setIcon(iconDrawable); applyLabel(info); }
packages\apps\Launcher3\src\com\android\launcher3\model\data\ItemInfoWithIcon.java
/**
* The bitmap for the application icon
*/
public BitmapInfo bitmap = BitmapInfo.LOW_RES_INFO;
/** * Returns a FastBitmapDrawable with the icon and context theme applied */ public FastBitmapDrawable newIcon(Context context, boolean applyTheme) { FastBitmapDrawable drawable = applyTheme ? bitmap.newThemedIcon(context) : bitmap.newIcon(context); drawable.setIsDisabled(isDisabled()); return drawable; }
frameworks\libs\systemui\iconloaderlib\src\com\android\launcher3\icons\BitmapInfo.java
/** * Creates a drawable for the provided BitmapInfo */ public FastBitmapDrawable newIcon(Context context) { FastBitmapDrawable drawable = isLowRes() ? new PlaceHolderIconDrawable(this, context) : new FastBitmapDrawable(this); drawable.mDisabledAlpha = GraphicsUtils.getFloat(context, R.attr.disabledIconAlpha, 1f); return drawable; }
在上述代码中发现调用applyFromApplicationInfo((AppInfo) info)进行图标数据的绑定加载，而在applyFromApplicationInfo((AppInfo) info)中applyIconAndLabel(info)是绑定图标和文字的
applyIconAndLabel 是对图标做处理显示的
所以就从这里解决问题
frameworks\libs\systemui\iconloaderlib\src\com\android\launcher3\icons\FastBitmapDrawable.java
进入FastBitmapDrawable .newIcon();
public class FastBitmapDrawable extends Drawable {
private static final float PRESSED_SCALE = 1.1f;
private static final float DISABLED_DESATURATION = 1f;
private static final float DISABLED_BRIGHTNESS = 0.5f;
public static final int CLICK_FEEDBACK_DURATION = 200;
private static ColorFilter sDisabledFColorFilter;
protected final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG);
protected Bitmap mBitmap;
protected final int mIconColor;
private boolean mIsPressed;
private boolean mIsDisabled;
private float mDisabledAlpha = 1f;
// Animator and properties for the fast bitmap drawable's scale
private static final Property<FastBitmapDrawable, Float> SCALE
= new Property<FastBitmapDrawable, Float>(Float.TYPE, "scale") {
@Override
public Float get(FastBitmapDrawable fastBitmapDrawable) {
return fastBitmapDrawable.mScale;
}
@Override
public void set(FastBitmapDrawable fastBitmapDrawable, Float value) {
fastBitmapDrawable.mScale = value;
fastBitmapDrawable.invalidateSelf();
}
};
/**
* Returns a FastBitmapDrawable with the icon.
*/
public static FastBitmapDrawable newIcon(Context context, ItemInfoWithIcon info) {
FastBitmapDrawable drawable = newIcon(context, info.bitmap);
drawable.setIsDisabled(info.isDisabled());
return drawable;
}
/**
* Creates a drawable for the provided BitmapInfo
*/
public static FastBitmapDrawable newIcon(Context context, BitmapInfo info) {
final FastBitmapDrawable drawable;
if (info instanceof Factory) {
drawable = ((Factory) info).newDrawable();
} else if (info.isLowRes()) {
drawable = new PlaceHolderIconDrawable(info, context);
} else {
drawable = new FastBitmapDrawable(info);
}
drawable.mDisabledAlpha = Themes.getFloat(context, R.attr.disabledIconAlpha, 1f);
return drawable;
}
}
通过调用FastBitmapDrawable .newIcon()等相关方法，发现最后
发现实际上是有FastBitmapDrawable来处理图标而在FastBitmapDrawable实际上也是Drawable 的资子类，最后得用draw(Canvas canvas)来绘制图标
继续跟踪FastBitmapDrawable
public FastBitmapDrawable(ItemInfoWithIcon info) {
this(info.iconBitmap, info.iconColor);
}
protected FastBitmapDrawable(Bitmap b, int iconColor) {
this(b, iconColor, false);
}
protected FastBitmapDrawable(Bitmap b, int iconColor, boolean isDisabled) {
mBitmap = b;
mIconColor = iconColor;
setFilterBitmap(true);
setIsDisabled(isDisabled);
}
@Override
public final void draw(Canvas canvas) {
if (mScale != 1f) {
int count = canvas.save();
Rect bounds = getBounds();
canvas.scale(mScale, mScale, bounds.exactCenterX(), bounds.exactCenterY());
drawInternal(canvas, bounds);
canvas.restoreToCount(count);
} else {
drawInternal(canvas, getBounds());
}
}
protected void drawInternal(Canvas canvas, Rect bounds) {
canvas.drawBitmap(mBitmap, null, bounds, mPaint);
}在draw(Canvas canvas)绘制图标后，最终调用drawInternal(Canvas canvas, Rect bounds)负责绘制图标，从以上代码可以看出 具体处理图标的地方是在drawInternal来实现对图标的绘制
所以就在这里对图标做圆角处理 具体如下:
protected void drawInternal(Canvas canvas, Rect bounds) {
- canvas.drawBitmap(mBitmap, null, bounds, mPaint);
+ // 初始化绘制纹理图
+ BitmapShader bitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
+ Paint paint = new Paint();
+ paint.setAntiAlias(true);
+ paint.setDither(true);
+ paint.setShader(bitmapShader);
+ paint.setStrokeWidth(16);
+ // 利用画笔将纹理图绘制到画布上面
+ int mWidth = Math.min(mBitmap.getWidth(), mBitmap.getHeight());
+ canvas.drawRoundRect(new RectF(8, 8, mWidth-8, mWidth-8), 40, 40, paint);
+ //canvas.drawCircle(mWidth / 2, mWidth / 2, mWidth / 2, paint);
+ //canvas.drawBitmap(mBitmap, null, bounds, mPaint);
}