问题
I am trying to place a SlidingTabLayout inside my android.support.v7.widget.Toolbar but for some reason there is extra top and bottom padding in portrait layout. As shown in this screenshot:
In landscape layout the android.support.v7.widget.Toolbar is shorter and the extra padding is gone:
I am aware of the contentInsertStart and contentInsetEnd attributes but there does not appear to be anything for top and bottom. Here is my layout:
<android.support.design.widget.AppBarLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:theme="?attr/actionBarTheme"
>
<!-- Changing the size of the toolbar fixed the problem below but I don't like the solution since the height difference is perceptible -->
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?attr/colorPrimary"
android:padding="0dp"
app:popupTheme="?attr/actionBarPopupTheme"
>
<!-- TODO: BUG - This isn't filling out the action bar in portrait (see note above) -->
<com.myapplication.views.widgets.SlidingTabLayout
android:id="@+id/sliding_tabs"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="@color/pink_400"
/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
As indicated in the comments if I manually set the height of the android.support.v7.widget.Toolbar to 48dp then the SlidingTabLayout fills it out but there are two problems here:
- The toolbar is a different height than the standard toolbar which is noticeable when changing activities.
- The icons in the
Toolbarare no longer vertically centered if I change it's height
So as the title says, how do I remove top and bottom padding from android.support.v7.widget.Toolbar?
回答1:
Ok so @RaviSravanKumar comment helped me figure this out. When I changed my layout back to:
<android.support.design.widget.AppBarLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:theme="?attr/actionBarTheme"
>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="?attr/actionBarPopupTheme"
>
<com.myapplication.views.widgets.SlidingTabLayout
android:id="@+id/sliding_tabs"
android:layout_width="wrap_content"
android:layout_height="?attr/actionBarSize"
/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
With the heights set to ?attr/actionBarSize I noticed the SlidingTabLayout was actually filling the entire height. I only noticed this because of the pink background I had set for debugging.
The reason I missed this originally was because the underline indicator was still not at the bottom (as shown in the screenshot in the original question). I had to make the following changes to the SlidingTabLayout code:
Original:
public SlidingTabLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// Disable the Scroll Bar
setHorizontalScrollBarEnabled(false);
// Make sure that the Tab Strips fills this View
setFillViewport(true);
mTitleOffset = (int) (TITLE_OFFSET_DIPS * getResources().getDisplayMetrics().density);
mTabStrip = new SlidingTabStrip(context);
addView(mTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
}
New: (note the change from LayoutParams.WRAP_CONTENT to LayoutParams.MATCH_PARENT:
public SlidingTabLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// Disable the Scroll Bar
setHorizontalScrollBarEnabled(false);
// Make sure that the Tab Strips fills this View
setFillViewport(true);
mTitleOffset = (int) (TITLE_OFFSET_DIPS * getResources().getDisplayMetrics().density);
mTabStrip = new SlidingTabStrip(context);
addView(mTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
}
Original:
protected TextView createDefaultTabView(Context context) {
TextView textView = new TextView(context);
textView.setGravity(Gravity.CENTER);
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP);
textView.setTypeface(Typeface.DEFAULT_BOLD);
textView.setLayoutParams(new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
TypedValue outValue = new TypedValue();
getContext().getTheme().resolveAttribute(android.R.attr.selectableItemBackground,
outValue, true);
textView.setBackgroundResource(outValue.resourceId);
if (Build.VERSION.SDK_INT >= 14) {
textView.setAllCaps(true);
}
int padding = (int) (TAB_VIEW_PADDING_DIPS * getResources().getDisplayMetrics().density);
textView.setPadding(padding, padding, padding, padding);
return textView;
}
New: (note the change to the layout params and padding)
protected TextView createDefaultTabView(Context context) {
TextView textView = new TextView(context);
textView.setGravity(Gravity.CENTER);
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP);
textView.setTypeface(Typeface.DEFAULT_BOLD);
textView.setLayoutParams(new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT));
TypedValue outValue = new TypedValue();
getContext().getTheme().resolveAttribute(android.R.attr.selectableItemBackground,
outValue, true);
textView.setBackgroundResource(outValue.resourceId);
if (Build.VERSION.SDK_INT >= 14) {
textView.setAllCaps(true);
}
int padding = (int) (TAB_VIEW_PADDING_DIPS * getResources().getDisplayMetrics().density);
textView.setPadding(padding, 0, padding, 0);
return textView;
}
来源：https://stackoverflow.com/questions/35823823/how-to-remove-top-and-bottom-padding-from-android-support-v7-widget-toolbar