是否可以在自定义标题视图中使用多个搜索按钮或另一个可聚焦按钮?问题是我只能聚焦一个按钮…
更新:
我做了什么:
有自定义标题视图类，它包含搜索Orb，标题文本视图，自定义Orb和模拟时钟。
问题是，当我试图聚焦搜索Orb，焦点去自定义Orb…这就是全部。只关注自定义球体
单击设置主搜索Orb的侦听器。我不知道问题出在哪里。如果需要，我可以按需发布其他代码。
谢谢你的帮助!
titleview.xml:
<?xml version="1.0" encoding="utf-8"?>
<com.olegmart.smart.base.CustomTitleView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/browse_title_group"
android:padding="16dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
CustomTitleView.java:
package com.olegmart.smart.base;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.support.v17.leanback.widget.SearchOrbView;
import android.support.v17.leanback.widget.TitleViewAdapter;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.ImageView;
import com.olegmart.smart.R;
public class CustomTitleView extends RelativeLayout implements TitleViewAdapter.Provider {
private final TextView mTitleView;
private final View mAnalogClockView;
private final View mGridOrbView;
private final View mSearchOrbView;
private final TitleViewAdapter mTitleViewAdapter = new TitleViewAdapter() {
@Override
public View getSearchAffordanceView() {
return mSearchOrbView;
}
@Override
public void setTitle(CharSequence titleText) {
CustomTitleView.this.setTitle(titleText);
}
@Override
public void setBadgeDrawable(Drawable drawable) {
//CustomTitleView.this.setBadgeDrawable(drawable);
}
@Override
public void updateComponentsVisibility(int flags) {
/*if ((flags & BRANDING_VIEW_VISIBLE) == BRANDING_VIEW_VISIBLE) {
updateBadgeVisibility(true);
} else {
mAnalogClockView.setVisibility(View.GONE);
mTitleView.setVisibility(View.GONE);
}*/
int visibility = (flags & SEARCH_VIEW_VISIBLE) == SEARCH_VIEW_VISIBLE
? View.VISIBLE : View.INVISIBLE;
mSearchOrbView.setVisibility(visibility);
}
private void updateBadgeVisibility(boolean visible) {
if (visible) {
mAnalogClockView.setVisibility(View.VISIBLE);
mGridOrbView.setVisibility(View.VISIBLE);
mTitleView.setVisibility(View.VISIBLE);
} else {
mAnalogClockView.setVisibility(View.GONE);
mGridOrbView.setVisibility(View.GONE);
mTitleView.setVisibility(View.GONE);
}
}
};
public CustomTitleView(Context context) {
this(context, null);
}
public CustomTitleView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CustomTitleView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
View root = LayoutInflater.from(context).inflate(R.layout.custom_titleview, this);
mTitleView = (TextView) root.findViewById(R.id.title_tv);
mAnalogClockView = root.findViewById(R.id.clock);
mGridOrbView = root.findViewById(R.id.grid_orb);
mSearchOrbView = root.findViewById(R.id.search_orb);
}
public void setTitle(CharSequence title) {
if (title != null) {
mTitleView.setText(title);
mTitleView.setVisibility(View.VISIBLE);
mGridOrbView.setVisibility(View.VISIBLE);
mAnalogClockView.setVisibility(View.VISIBLE);
}
}
public void setBadgeDrawable(Drawable drawable) {
if (drawable != null) {
mTitleView.setVisibility(View.GONE);
mGridOrbView.setVisibility(View.VISIBLE);
mAnalogClockView.setVisibility(View.VISIBLE);
}
}
@Override
public TitleViewAdapter getTitleViewAdapter() {
return mTitleViewAdapter;
}
}
custom_titleview.xml:
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v17.leanback.widget.SearchOrbView
android:id="@+id/search_orb"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:transitionGroup="true"
android:layout_gravity="center_vertical|start"
android:layout_marginTop="8dp"
android:paddingStart="48dp"
android:focusable="true"
android:nextFocusRight="@+id/grid_orb"
/>
<AnalogClock
android:id="@+id/clock"
android:layout_width="80dp"
android:layout_height="80dp"
android:padding="6dp"
android:layout_alignParentEnd="true"
android:layout_gravity="center_vertical|end"
android:layout_marginEnd="24dp" />
<android.support.v17.leanback.widget.SearchOrbView
android:id="@+id/grid_orb"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginEnd="24dp"
android:layout_centerVertical="true"
android:layout_toStartOf="@id/clock"
android:nextFocusLeft="@+id/search_orb"
android:focusable="true"
/>
<TextView
android:id="@+id/title_tv"
android:textAppearance="@android:style/TextAppearance.Large"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="24dp"
android:layout_centerVertical="true"
android:layout_toStartOf="@id/grid_orb" />
</merge>
俞登宝是对的....在BrowseFragment中的OnFocusSearchListener是焦点变化没有发生的原因，因为你会期望。
先介绍一下背景知识…
当焦点搜索发生时，它将首先调用当前ViewGroup中的focusSearch方法。在这种情况下，虽然搜索球体具有当前焦点，并且用户按下d键以在不同方向上进行焦点，但focus-search的第一个回调将在您的CustomTitleView类中。只有在 CustomTitleView将focusSearch传播到父类之后，才会调用BrowseFragment的OnFocusSearchListener。
这里真正的问题是(在写这篇文章的时候)，Leanback BrowseFragment的OnFocusSearchListener是编码的，这样你添加到你的CustomTitleLayout的其他视图将永远不会真正能够集中。
但是，有一种方法可以在您的CustomTitleLayout中关注其他子视图....
在CustomTitleLayout中重写focusSearch方法，如下面的代码示例所示，并返回一个存在于自定义标题布局中的可聚焦视图(而不是返回super.focusSearch)。
注意，这段代码依赖于在CustomTitleView的子视图上设置nextFocusLeft和nextFocusRight属性。此外，子视图必须是可聚焦的视图(Button…等)。如果子视图在默认情况下是不可聚焦的(比如TextView)，你将不得不通过android:focusable="true"的XML或View.setFocusable(true)的代码手动启用视图可聚焦。
public class CustomTitleView extends RelativeLayout implements TitleViewAdapter.Provider {
.... all your custom view stuff....
@Override
public View focusSearch(View focused, int direction) {
View nextFoundFocusableViewInLayout = null;
// Only concerned about focusing left and right at the moment
if (direction == View.FOCUS_LEFT || direction == View.FOCUS_RIGHT) {
// Try to find the next focusable item in this layout for the supplied direction
int nextFoundFocusableViewInLayoutId = -1;
switch(direction) {
case View.FOCUS_LEFT :
nextFoundFocusableViewInLayoutId = focused.getNextFocusLeftId();
break;
case View.FOCUS_RIGHT :
nextFoundFocusableViewInLayoutId = focused.getNextFocusRightId();
break;
}
// View id for next focus direction found....get the View
if (nextFoundFocusableViewInLayoutId != -1) {
nextFoundFocusableViewInLayout = findViewById(nextFoundFocusableViewInLayoutId);
}
}
// Return the found View in the layout if it's focusable
if (nextFoundFocusableViewInLayout != null && nextFoundFocusableViewInLayout.isFocusable()) {
return nextFoundFocusableViewInLayout;
} else {
// No focusable view found in layout...propagate to super (should invoke the BrowseFrameLayout.OnFocusSearchListener
return super.focusSearch(focused, direction);
}
}
@Override
protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
// Gives focus to the SearchOrb first....if not...default to normal descendant focus search
return getSearchAffordanceView().requestFocus() || super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
}
}
在BrowseFrameLayout中，正常的focusSearch()被OnFocusSearchListener拦截:
@Override
public View focusSearch(View focused, int direction) {
if (mListener != null) {
View view = mListener.onFocusSearch(focused, direction);
if (view != null) {
return view;
}
}
return super.focusSearch(focused, direction);
}
并且在您的情况下很可能返回null，参见:
private final BrowseFrameLayout.OnFocusSearchListener mOnFocusSearchListener =
new BrowseFrameLayout.OnFocusSearchListener() {
@Override
public View onFocusSearch(View focused, int direction) {
// if headers is running transition, focus stays
if (mCanShowHeaders && isInHeadersTransition()) {
return focused;
}
if (DEBUG) Log.v(TAG, "onFocusSearch focused " + focused + " + direction " + direction);
if (getTitleView() != null && focused != getTitleView() &&
direction == View.FOCUS_UP) {
return getTitleView();
}
if (getTitleView() != null && getTitleView().hasFocus() &&
direction == View.FOCUS_DOWN) {
return mCanShowHeaders && mShowingHeaders ?
mHeadersFragment.getVerticalGridView() : mMainFragment.getView();
}
boolean isRtl = ViewCompat.getLayoutDirection(focused) == View.LAYOUT_DIRECTION_RTL;
int towardStart = isRtl ? View.FOCUS_RIGHT : View.FOCUS_LEFT;
int towardEnd = isRtl ? View.FOCUS_LEFT : View.FOCUS_RIGHT;
if (mCanShowHeaders && direction == towardStart) {
if (isVerticalScrolling() || mShowingHeaders || !isHeadersDataReady()) {
return focused;
}
return mHeadersFragment.getVerticalGridView();
} else if (direction == towardEnd) {
if (isVerticalScrolling()) {
return focused;
} else if (mMainFragment != null && mMainFragment.getView() != null) {
return mMainFragment.getView();
}
return focused;
} else if (direction == View.FOCUS_DOWN && mShowingHeaders) {
// disable focus_down moving into PageFragment.
return focused;
} else {
return null;
}
}
};
BrowseFragment或BrowseFrameLayout
如果您希望对屏幕上的可聚焦项进行更多自定义，您可能需要查看文档中的nextFocusForward和类似的XML属性。