这是我入职的第一个BUG,头疼,隔壁实习生一周解决了,我多花了几天
其中最大的原因就是我思考复杂了,在公司系统上,此BUG标题为:
请确认Wifi优先级,状态栏Wifi被忽略
BUG意思就是:当前安卓系统状态栏图标有显示尺寸的测量,如果比如需要显示8个图标,已经在状态栏绘制不下,则显示一个点表示省略,而不希望wifi被省略
我思考了一下一直以为就是优先级问题,是不是Android底层状态栏有各个图标优先级,图标过多的时候优先级高的就不会被隐藏,而其实最后参考了公司以前相关BUG的修改,其实只是状态栏的图标大小修改即可,将图标改小,状态栏就可以多一个显示图标,Wifi就不会被隐藏。(点向后一个图标挪了一位)
在尺寸文件中进行修改:对这两个尺寸进行改小(可以调一下刷机看一下)
<dimen name="status_bar_icon_size">14dip</dimen>
<dimen name="status_bar_system_icon_size">11.5dp</dimen>
值得一提的是上面的逻辑:超出的图标隐藏、绘制、测量相关的Java类是:StatusIconContainer.Java(虽然和BUG不在这改,记录一下)
java
/**
* StatusIconContainer 是 StatusBarMobileView 内部的一个自定义视图容器,用于管理状态图标的显示。
* 它负责在 StatusBarMobileView 中管理状态图标的布局和可见性。
*/
public class StatusIconContainer extends AlphaOptimizedLinearLayout {
//TAG
private static final String TAG = "StatusIconContainer";
//是否打开DEBUG模式,会Log相关信息
private static final boolean DEBUG = false;
//是否打开DEBUG_OVERFLOW,会在状态栏绘制边框用来显示区域什么的
private static final boolean DEBUG_OVERFLOW = false;
// 最多可以显示 8 个状态图标,包括电池图标
private static final int MAX_ICONS = 7;
// private static final int MAX_ICONS = 8;
//点的个数
private static final int MAX_DOTS = 1;
//Dot 点 Icon图标 相关属性
private int mDotPadding;
private int mIconSpacing;
private int mStaticDotDiameter;
private int mUnderflowWidth;
private int mUnderflowStart = 0;
// 是否可以在溢出空间中绘制
private boolean mNeedsUnderflow;
// 单个 StatusBarIconView 的点图标在此宽度内居中显示
private int mIconDotFrameWidth;
private boolean mShouldRestrictIcons = true;
// 用于计算哪些状态要在布局期间可见
private ArrayList<StatusIconState> mLayoutStates = new ArrayList<>();
// 为了正确计数和测量
private ArrayList<View> mMeasureViews = new ArrayList<>();
// 任何被忽略的图标将不会被添加为子视图
private ArrayList<String> mIgnoredSlots = new ArrayList<>();
/**
* 创建 StatusIconContainer 的构造函数。
*
* @param context Android 上下文对象
*/
public StatusIconContainer(Context context) {
this(context, null);
}
/**
* 创建 StatusIconContainer 的构造函数。
*
* @param context Android 上下文对象
* @param attrs 属性集
*/
public StatusIconContainer(Context context, AttributeSet attrs) {
super(context, attrs);
initDimens();
setWillNotDraw(!DEBUG_OVERFLOW);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
}
/**
* 设置是否限制状态图标的显示。
*
* @param should 是否应该限制状态图标的显示
*/
public void setShouldRestrictIcons(boolean should) {
mShouldRestrictIcons = should;
}
/**
* 检查是否正在限制状态图标的显示。
*
* @return 如果正在限制状态图标的显示,则返回 true;否则返回 false。
*/
public boolean isRestrictingIcons() {
return mShouldRestrictIcons;
}
/**
* 初始化尺寸参数。
*/
private void initDimens() {
// 这是与 StatusBarIconView 使用相同的值
mIconDotFrameWidth = getResources().getDimensionPixelSize(
com.android.internal.R.dimen.status_bar_icon_size);
mDotPadding = getResources().getDimensionPixelSize(R.dimen.overflow_icon_dot_padding);
mIconSpacing = getResources().getDimensionPixelSize(R.dimen.status_bar_system_icon_spacing);
// 点图标
int radius = getResources().getDimensionPixelSize(R.dimen.overflow_dot_radius);
// 计算点的直径 R.dimen.overflow_dot_radius 2dp
mStaticDotDiameter = 2 * radius;
// 不能超过宽度 mIconDotFrameWidth 图标宽度 最大图标个数-1(可能还有个点,所以-1) 每个宽高
mUnderflowWidth = mIconDotFrameWidth + (MAX_DOTS - 1) * (mStaticDotDiameter + mDotPadding);
android.util.Log.d(TAG, "initDimens: " + mUnderflowStart);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
float midY = getHeight() / 2.0f;
// 首先对所有子视图进行布局,以便稍后移动它们
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
int width = child.getMeasuredWidth();
int height = child.getMeasuredHeight();
int top = (int) (midY - height / 2.0f);
child.layout(0, top, width, top + height);
}
resetViewStates();
calculateIconTranslations();
applyIconStates();
}
//绘制
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (DEBUG_OVERFLOW) {
//如果开启了DEBUG_OVERFLOW模式画框框
Paint paint = new Paint();
paint.setStyle(Style.STROKE);
paint.setColor(Color.RED);
// 显示边界框
canvas.drawRect(getPaddingStart(), 0, getWidth() - getPaddingEnd(), getHeight(), paint);
// 显示溢出框
paint.setColor(Color.GREEN);
canvas.drawRect(
mUnderflowStart, 0, mUnderflowStart + mUnderflowWidth, getHeight(), paint);
}
}
//测量
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
mMeasureViews.clear();
int mode = MeasureSpec.getMode(widthMeasureSpec);
final int width = MeasureSpec.getSize(widthMeasureSpec);
final int count = getChildCount();
// 收集所有希望进行布局的视图
for (int i = 0; i < count; i++) {
// 获取子视图
StatusIconDisplayable icon = (StatusIconDisplayable) getChildAt(i);
// 如果视图可见且没有被阻止,则加入可见视图列表
if (icon.isIconVisible() && !icon.isIconBlocked()
&& !mIgnoredSlots.contains(icon.getSlot())) {
mMeasureViews.add((View) icon);
}
}
// 可见视图数量
int visibleCount = mMeasureViews.size();
int maxVisible = visibleCount <= MAX_ICONS ? MAX_ICONS : MAX_ICONS - 1;
int totalWidth = mPaddingLeft + mPaddingRight;
boolean trackWidth = true;
// 测量所有子视图,以便它们报告正确的宽度
int childWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.UNSPECIFIED);
mNeedsUnderflow = mShouldRestrictIcons && visibleCount > MAX_ICONS;
for (int i = 0; i < visibleCount; i++) {
View child = mMeasureViews.get(i);
measureChild(child, childWidthSpec, heightMeasureSpec);
int spacing = i == visibleCount - 1 ? 0 : mIconSpacing;
if (mShouldRestrictIcons) {
if (i < maxVisible && trackWidth) {
totalWidth += getViewTotalMeasuredWidth(child) + spacing;
} else if (trackWidth) {
// 达到图标限制;为点图标添加空间
totalWidth += mUnderflowWidth;
trackWidth = false;
}
} else {
totalWidth += getViewTotalMeasuredWidth(child) + spacing;
}
}
if (mode == MeasureSpec.EXACTLY) {
if (!mNeedsUnderflow && totalWidth > width) {
mNeedsUnderflow = true;
}
setMeasuredDimension(width, MeasureSpec.getSize(heightMeasureSpec));
} else {
if (mode == MeasureSpec.AT_MOST && totalWidth > width) {
mNeedsUnderflow = true;
totalWidth = width;
}
setMeasuredDimension(totalWidth, MeasureSpec.getSize(heightMeasureSpec));
}
}
@Override
public void onViewAdded(View child) {
super.onViewAdded(child);
StatusIconState vs = new StatusIconState();
vs.justAdded = true;
child.setTag(R.id.status_bar_view_state_tag, vs);
}
@Override
public void onViewRemoved(View child) {
super.onViewRemoved(child);
child.setTag(R.id.status_bar_view_state_tag, null);
}
/**
* 添加要忽略的图标槽的名称。它将不会显示在布局中也不会被测量。
*
* @param slotName 图标的名称,就像在 frameworks/base/core/res/res/values/config.xml 中定义的那样
*/
public void addIgnoredSlot(String slotName) {
android.util.Log.d(TAG, "addIgnoredSlot: " + slotName);
boolean added = addIgnoredSlotInternal(slotName);
if (added) {
requestLayout();
}
}
/**
* 添加要忽略的图标槽的名称的列表。
*
* @param slots 要忽略的图标的名称列表
*/
public void addIgnoredSlots(List<String> slots) {
for (String slot : slots) {
android.util.Log.d(TAG, "addIgnoredSlots: " + slot);
}
boolean willAddAny = false;
for (String slot : slots) {
willAddAny |= addIgnoredSlotInternal(slot);
}
if (willAddAny) {
requestLayout();
}
}
/**
* 内部添加要忽略的图标槽名称。
*
* @param slotName 图标的名称,就像在 frameworks/base/core/res/res/values/config.xml 中定义的那样
* @return 如果成功添加,则返回 true,否则返回 false
*/
private boolean addIgnoredSlotInternal(String slotName) {
android.util.Log.d(TAG, "addIgnoredSlotInternal: " + slotName);
if (mIgnoredSlots.contains(slotName)) {
return false;
}
mIgnoredSlots.add(slotName);
return true;
}
/**
* 从忽略的图标槽中移除一个名称。
*
* @param slotName 要移除的图标槽的名称
*/
public void removeIgnoredSlot(String slotName) {
android.util.Log.d(TAG, "removeIgnoredSlot: " + slotName);
boolean removed = mIgnoredSlots.remove(slotName);
if (removed) {
requestLayout();
}
}
/**
* 从忽略的图标槽中移除名称的列表。
*
* @param slots 要移除的图标槽的名称列表
*/
public void removeIgnoredSlots(List<String> slots) {
for (String slot: slots) {
android.util.Log.d(TAG, "removeIgnoredSlot: " + slot);
}
boolean removedAny = false;
for (String slot : slots) {
removedAny |= mIgnoredSlots.remove(slot);
}
if (removedAny) {
requestLayout();
}
}
/**
* 设置要忽略的图标槽的列表,清除当前的列表。
*
* @param slots 要忽略的图标槽的名称列表
*/
public void setIgnoredSlots(List<String> slots) {
mIgnoredSlots.clear();
addIgnoredSlots(slots);
}
/**
* 返回与特定槽名称相对应的视图。
* 仅用于操作它如何呈现。
*
* @param slot 槽名称,与 com.android.internal.R.config_statusBarIcons 中定义的名称相对应
* @return 如果此容器拥有相应的视图,则返回该视图,否则返回 null
*/
public View getViewForSlot(String slot) {
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (child instanceof StatusIconDisplayable
&& ((StatusIconDisplayable) child).getSlot().equals(slot)) {
return child;
}
}
return null;
}
/**
* 布局从右到左发生。
*/
private void calculateIconTranslations() {
mLayoutStates.clear();
float width = getWidth();
float translationX = width - getPaddingEnd();
float contentStart = getPaddingStart();
int childCount = getChildCount();
// Underflow === 不显示内容直到此索引
if (DEBUG) Log.d(TAG, "calculateIconTranslations: start=" + translationX
+ " width=" + width + " underflow=" + mNeedsUnderflow);
// 收集所有希望可见的状态
for (int i = childCount - 1; i >= 0; i--) {
View child = getChildAt(i);
StatusIconDisplayable iconView = (StatusIconDisplayable) child;
StatusIconState childState = getViewStateFromChild(child);
if (!iconView.isIconVisible() || iconView.isIconBlocked()
|| mIgnoredSlots.contains(iconView.getSlot())) {
childState.visibleState = STATE_HIDDEN;
if (DEBUG) Log.d(TAG, "skipping child (" + iconView.getSlot() + ") not visible");
continue;
}
// 移动 translationX 到布局的位置,以添加视图而不截断子视图
translationX -= getViewTotalWidth(child);
childState.visibleState = STATE_ICON;
childState.xTranslation = translationX;
mLayoutStates.add(0, childState);
// 为下一个视图移动 translationX 以腾出间隔
translationX -= mIconSpacing;
}
// 显示 1 至 MAX_ICONS 个图标,或 (MAX_ICONS - 1) 个图标 + 溢出
int totalVisible = mLayoutStates.size();
int maxVisible = totalVisible <= MAX_ICONS ? MAX_ICONS : MAX_ICONS - 1;
mUnderflowStart = 0;
int visible = 0;
int firstUnderflowIndex = -1;
for (int i = totalVisible - 1; i >= 0; i--) {
StatusIconState state = mLayoutStates.get(i);
// 如果在测量时发现需要溢出,则允许在此之前腾出空间
if (mNeedsUnderflow && (state.xTranslation < (contentStart + mUnderflowWidth)) ||
(mShouldRestrictIcons && visible >= maxVisible)) {
firstUnderflowIndex = i;
break;
}
mUnderflowStart = (int) Math.max(
contentStart, state.xTranslation - mUnderflowWidth - mIconSpacing);
visible++;
}
//开始判断是否超出 超出则画点
if (firstUnderflowIndex != -1) {
int totalDots = 0;
int dotWidth = mStaticDotDiameter + mDotPadding;
int dotOffset = mUnderflowStart + mUnderflowWidth - mIconDotFrameWidth;
for (int i = firstUnderflowIndex; i >= 0; i--) {
StatusIconState state = mLayoutStates.get(i);
if (totalDots < MAX_DOTS) {
state.xTranslation = dotOffset;
state.visibleState = STATE_DOT;
dotOffset -= dotWidth;
totalDots++;
} else {
state.visibleState = STATE_HIDDEN;
}
}
}
// 从 NotificationIconContainer 中拿来的,不是最优解,但保持布局逻辑简洁
if (isLayoutRtl()) {
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
StatusIconState state = getViewStateFromChild(child);
state.xTranslation = width - state.xTranslation - child.getWidth();
}
}
}
private void applyIconStates() {
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
StatusIconState vs = getViewStateFromChild(child);
if (vs != null) {
vs.applyToView(child);
}
}
}
private void resetViewStates() {
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
StatusIconState vs = getViewStateFromChild(child);
if (vs == null) {
continue;
}
vs.initFrom(child);
vs.alpha = 1.0f;
vs.hidden = false;
}
}
private static @Nullable StatusIconState getViewStateFromChild(View child) {
return (StatusIconState) child.getTag(R.id.status_bar_view_state_tag);
}
private static int getViewTotalMeasuredWidth(View child) {
return child.getMeasuredWidth() + child.getPaddingStart() + child.getPaddingEnd();
}
private static int getViewTotalWidth(View child) {
return child.getWidth() + child.getPaddingStart() + child.getPaddingEnd();
}
public static class StatusIconState extends ViewState {
/// StatusBarIconView.STATE_*
public int visibleState = STATE_ICON;
public boolean justAdded = true;
// 从视图末尾的距离是最相关的,用于动画
float distanceToViewEnd = -1;
@Override
public void applyToView(View view) {
float parentWidth = 0;
if (view.getParent() instanceof View) {
parentWidth = ((View) view.getParent()).getWidth();
}
float currentDistanceToEnd = parentWidth - xTranslation;
if (!(view instanceof StatusIconDisplayable)) {
return;
}
StatusIconDisplayable icon = (StatusIconDisplayable) view;
AnimationProperties animationProperties = null;
boolean animateVisibility = true;
// 用于计算哪些状态在布局过程中是可见的,找出哪些属性的状态转换(如果有的话)我们需要动画
// 确定要动画的状态转换的属性(如果有)
if (justAdded
|| icon.getVisibleState() == STATE_HIDDEN && visibleState == STATE_ICON) {
// 图标正在出现,通过将其放在它将出现的位置并动画 alpha 来淡入它
super.applyToView(view);
view.setAlpha(0.f);
icon.setVisibleState(STATE_HIDDEN);
animationProperties = ADD_ICON_PROPERTIES;
} else if (icon.getVisibleState() != visibleState) {
if (icon.getVisibleState() == STATE_ICON && visibleState == STATE_HIDDEN) {
// 消失,不要执行任何复杂的操作
animateVisibility = false;
} else {
// 所有其他转换(到/从点等)
animationProperties = ANIMATE_ALL_PROPERTIES;
}
} else if (visibleState != STATE_HIDDEN && distanceToViewEnd != currentDistanceToEnd) {
// 可见性不在发生变化,只需动画位置
animationProperties = X_ANIMATION_PROPERTIES;
}
icon.setVisibleState(visibleState, animateVisibility);
if (animationProperties != null) {
view.animate().cancel();
icon.addTransformationToViewGroup(view, animationProperties, null);
}
icon.applyInShelfTransformation(view, this, animationProperties, animationProperties);
}
}
}