Android工具栏背景问题(闪烁和可绘制问题)
我有一个应用程序,它的AppCompat工具栏实现如下Android工具栏背景问题(闪烁和可绘制问题),android,android-drawable,android-toolbar,Android,Android Drawable,Android Toolbar,我有一个应用程序,它的AppCompat工具栏实现如下 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" android:layout_weight="0
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:layout_weight="0">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical">
<LinearLayout
android:id="@+id/toolbar_bg"
android:animateLayoutChanges="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="0dp"
android:gravity="right|center_vertical"
android:padding="0dp">
<TextView
android:animateLayoutChanges="true"
android:id="@+id/action_bar_restaurant_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="@dimen/restaurant_label_action_bar_margin_start"
android:layout_weight="1"
android:ellipsize="end"
android:gravity="left"
android:singleLine="true"
android:textColor="@color/white"
android:shadowDy="1"
android:shadowDx="1"
android:shadowRadius="1"
android:shadowColor="@color/black"
android:textSize="@dimen/restaurant_label_action_bar_font_size"
/>
<LinearLayout
android:focusable="true"
android:layout_weight="1"
android:animateLayoutChanges="true"
android:id="@+id/search_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginRight="14dp"
android:gravity="center_vertical"
android:background="@drawable/search_bg_focused"
android:orientation="horizontal">
<AutoCompleteTextView
android:id="@+id/search_view"
android:layout_width="0dp"
android:background="@color/transparent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical"
android:hint="@string/search"
android:imeOptions="actionSearch"
android:inputType="text"
android:maxLines="1"
android:paddingLeft="2dp"
android:paddingBottom="4dp"
android:shadowColor="@color/black"
android:shadowDx="1"
android:shadowDy="1"
android:shadowRadius="1"
android:singleLine="true"
android:textColor="#FFFFFFFF"
android:textColorHint="#FFFFFFFF"
style="@style/Base.Widget.AppCompat.EditText"
/>
<ImageView
android:id="@+id/search_clear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingLeft="16dp"
android:paddingRight="0dp"
android:src="@drawable/abc_ic_clear_mtrl_alpha" />
</LinearLayout>
.
.
. (more content here but it has not effect)
. (I already tried removing them and had the same behavior)
.
.
</LinearLayout>
</android.support.v7.widget.Toolbar>
</LinearLayout>
考虑到background drawable/actionbar_background.xml实际上如下所示:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<solid android:color="#CC0000"></solid>
</shape>
我从工具栏的这种外观开始:
当我在工具栏中单击任何可以修改工具栏内容的内容(例如显示搜索字段)时,我通常会得到以下结果:
但只要我调用上面的方法,它就会重置背景可绘制,并且工具栏的整个背景可绘制再次可见
我做错了什么
这只发生在我从ActionBar迁移到工具栏时
Kitkat 4.4.x、棒棒糖5.0和5.1上的行为相同
有人建议:默认情况下,工具栏不会重新绘制其背景
但是我怎么能强迫它,而不是在每次更改后手动执行,并看到这种闪烁的效果呢?我刚刚在两个月后想出了一个解决方案 只需将用于设置背景的方法更改为将其设置为“颜色”,而不是“背景可绘制”,即可解决此问题:
public void updateActionBarBackground(int scrollY, int initialScroll)
{
float alphaRatio = ((1f * scrollY) - (1f * initialScroll)) / (1f * initialScroll);
int alpha = Math.min((int) Math.round(alphaRatio * MAX_ALPHA_VALUE), MAX_ALPHA_VALUE);
Drawable bg = getResources().getDrawable(R.drawable.actionbar_background);
Drawable bgStatus = getResources().getDrawable(R.drawable.statusbar_background);
bg.setAlpha(alpha);
bgStatus.setAlpha(alpha);
toolbar.setBackgroundColor(getResources().getColor(R.color.medium_red));
toolbar.getBackground().setAlpha(alpha);
tintManager.setStatusBarTintDrawable(bg);
tintManager.setNavigationBarAlpha(0);
}
public void updateActionBarBackground(int scrollY, int initialScroll)
{
float alphaRatio = ((1f * scrollY) - (1f * initialScroll)) / (1f * initialScroll);
int alpha = Math.min((int) Math.round(alphaRatio * MAX_ALPHA_VALUE), MAX_ALPHA_VALUE);
Drawable bg = getResources().getDrawable(R.drawable.actionbar_background);
Drawable bgStatus = getResources().getDrawable(R.drawable.statusbar_background);
bg.setAlpha(alpha);
bgStatus.setAlpha(alpha);
toolbar.setBackgroundColor(getResources().getColor(R.color.medium_red));
toolbar.getBackground().setAlpha(alpha);
tintManager.setStatusBarTintDrawable(bg);
tintManager.setNavigationBarAlpha(0);
}