标签：android android-actionbar android-icons
Android 4.2中的操作栏图标大小是否已更改？
我有一个120x48px HDPI图标,在Android 4.1及更低版本中完美呈现.它仍然是.
但是,在任何4.2设备上,它都被压缩到可以看到的48x48px.或类似的东西;这绝对是一个广场.
有任何想法吗 ？谢谢 ！
解决方法:
所以,我找到了一个答案,它有点hacky但是有效(TM)：
一般的想法是监听布局更改并将新边界应用于drawable.这看起来像这样：
public static void updateActionBar(final Activity activity) {
if (Build.VERSION.SDK_INT >= 17) {
try {
final View content = activity.findViewById(android.R.id.content);
if (content instanceof FrameLayout) {
final FrameLayout contentFrameLayout = (FrameLayout) content;
final ViewParent parent = contentFrameLayout.getParent();
if (parent instanceof LinearLayout) {
final LinearLayout parentLinearLayout = (LinearLayout) parent;
final Class<?> actionBarContainerClass = Class.forName("com.android.internal.widget.ActionBarContainer");
final Class<?> actionBarViewClass = Class.forName("com.android.internal.widget.ActionBarView");
final Class<?> actionMenuViewClass = Class.forName("com.android.internal.view.menu.ActionMenuView");
final Class<?> actionMenuItemViewClass = Class.forName("com.android.internal.view.menu.ActionMenuItemView");
for (int i = 0, childCount = parentLinearLayout.getChildCount(); i < childCount; i++) {
final View parentLinearLayoutChild = parentLinearLayout.getChildAt(i);
handleParentLinearLayoutChild(actionBarContainerClass, actionBarViewClass, actionMenuViewClass, actionMenuItemViewClass, parentLinearLayoutChild);
}
}
}
} catch (Exception e) {
// Handle or ignore
}
}
}
private static void handleParentLinearLayoutChild(final Class<?> actionBarContainerClass, final Class<?> actionBarViewClass, final Class<?> actionMenuViewClass, final Class<?> actionMenuItemViewClass, final View parentLinearLayoutChild) {
if (parentLinearLayoutChild instanceof FrameLayout && parentLinearLayoutChild.getClass().equals(actionBarContainerClass)) {
final FrameLayout actionBarContainer = (FrameLayout) parentLinearLayoutChild;
for (int i = 0, actionBarContainerChildCount = actionBarContainer.getChildCount(); i < actionBarContainerChildCount; i++) {
final View actionBarContainerChild = actionBarContainer.getChildAt(i);
handleActionBarContainerChild(actionBarViewClass, actionMenuViewClass, actionMenuItemViewClass, actionBarContainerChild);
}
}
}
private static void handleActionBarContainerChild(final Class<?> actionBarViewClass, final Class<?> actionMenuViewClass, final Class<?> actionMenuItemViewClass, final View actionBarContainerChild) {
if (actionBarContainerChild instanceof ViewGroup && actionBarContainerChild.getClass().equals(actionBarViewClass)) {
final ViewGroup actionBarView = (ViewGroup) actionBarContainerChild;
actionBarView.setOnHierarchyChangeListener(new ViewGroup.OnHierarchyChangeListener() {
@Override
public void onChildViewAdded(final View parent, final View child) {
handleActionBarViewChild(child, actionMenuViewClass, actionMenuItemViewClass);
}
@Override
public void onChildViewRemoved(final View parent, final View child) {
}
});
for (int i = 0, actionBarViewCount = actionBarView.getChildCount(); i < actionBarViewCount; i++) {
handleActionBarViewChild(actionBarView.getChildAt(i3), actionMenuViewClass, actionMenuItemViewClass);
}
}
}
private static void handleActionBarViewChild(final View child, final Class<?> actionMenuViewClass, final Class<?> actionMenuItemViewClass) {
try {
if (child instanceof LinearLayout && child.getClass().equals(actionMenuViewClass)) {
final LinearLayout actionMenuView = (LinearLayout) child;
actionMenuView.setOnHierarchyChangeListener(new ViewGroup.OnHierarchyChangeListener() {
@Override
public void onChildViewAdded(final View parent, final View child) {
handleActionMenuViewChild(child, actionMenuItemViewClass);
}
@Override
public void onChildViewRemoved(final View parent, final View child) {
}
});
for (int i = 0, actionMenuViewCount = actionMenuView.getChildCount(); i < actionMenuViewCount; i++) {
handleActionMenuViewChild(actionMenuView.getChildAt(i), actionMenuItemViewClass);
}
}
} catch (Exception e) {
// Handle or ignore
}
}
private static void handleActionMenuViewChild(final View child, final Class<?> actionMenuItemViewClass) {
try {
if (child instanceof TextView && child.getClass().equals(actionMenuItemViewClass)) {
final TextView menuViewChild = (TextView) child;
final Drawable[] compoundDrawables = menuViewChild.getCompoundDrawables();
final Drawable leftDrawable = compoundDrawables[0];
final int intrinsicWidth = leftDrawable.getIntrinsicWidth();
final int intrinsicHeight = leftDrawable.getIntrinsicHeight();
leftDrawable.setBounds(0, 0, intrinsicWidth , intrinsicHeight );
menuViewChild.setCompoundDrawables(leftDrawable, null, null, null);
menuViewChild.setPadding(menuViewChild.getPaddingLeft(), 0, menuViewChild.getPaddingRight(), 0);
menuViewChild.invalidate();
menuViewChild.requestLayout();
}
} catch (Exception e) {
// Handle or ignore
}
}
然后,您必须在以下回调中的每个Activity中调用updateActionBar(我建议您从中扩展一个抽象基本活动)：
的onCreate
onMenuOpened(我发现如果你把它叫做延迟(例如200ms),它会提高性能并减少闪烁(drawables的大小变化))
onPrepareOptionsMenu(我发现如果你把它叫做延迟(例如200ms),它会提高性能并减少闪烁(drawables的大小变化))
这适用于Nexus 7和Android 4.2的Nexus 10.您可以预期它会因未来的更新而失败,但至少目前它似乎有效.
标签：android,android-actionbar,android-icons 来源： https://codeday.me/bug/20190926/1821802.html
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。