我有一个活动，其中有三个片段放在ViewPager中。在前两个片段中，我有一个下拉列表，有点像动画的ExpandableListView，但它是一个包含TextView和ImageView的简单RelativeLayout，当按下向下滑动包含一些元素的LinearLayout时。单击RelativeLayout时，将执行以下操作：
问题如下：
第一个片段只包含一个列表（显示或隐藏LinearLayout的RelativeLayout），它可以正常工作，背景，文本颜色和图像更改，图像旋转，Linearlayout相应地上下滑动。第二个片段包含4个这样的分组（RelativeLayout控制LinearLayout），并且在第一次显示该片段时，只有第一个分组似乎有效。其他三个改变背景并滑动Linearlayout，但据我所知它保持相同的颜色和相同的图像（有两种颜色，白色和橙色的变化，因为背景从橙色变为白色我假设文本保持白色而不是变为橙色，图像也一样。）
妙语：
当我离开它几秒钟并再次点击它它工作正常，一切都相应地改变，如果我例如翻转到第三个片段然后回到第二个片段它工作。另一方面，如果我启动应用程序，得到第二个片段，回到第一个片段，再到第二个片段，它不起作用。
我不知道这是否与GC和回收视图或其他内容有关。
的 XML：
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/nutritionList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/aboutWetFood"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:clickable="false"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/wetSub"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="60dp"
android:orientation="vertical"
android:visibility="gone" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/TextView04"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:id="@+id/wetLayout"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="@color/my_yellow"
android:clickable="true"
android:onClick="openNutrition"
android:tag="wet" >
<TextView
android:id="@+id/wetTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="@string/wet_food"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<ImageView
android:id="@+id/wetArrow"
android:layout_width="12dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="30dp"
android:src="@drawable/arrow_right_white" />
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/aboutDryFood"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:clickable="false"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/drySub"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="60dp"
android:orientation="vertical"
android:visibility="gone" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/TextView06"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/TextView05"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:id="@+id/dryLayout"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="@color/my_yellow"
android:clickable="true"
android:onClick="openNutrition"
android:tag="dry" >
<TextView
android:id="@+id/dryTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="@string/dry_food"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<ImageView
android:id="@+id/dryArrow"
android:layout_width="12dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="30dp"
android:src="@drawable/arrow_right_white" />
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/whyMixedFeeding"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:clickable="false"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/mixedSub"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="60dp"
android:orientation="vertical"
android:visibility="gone" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/TextView08"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/TextView07"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:id="@+id/mixedLayout"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="@color/my_yellow"
android:clickable="true"
android:onClick="openNutrition"
android:tag="mixed" >
<TextView
android:id="@+id/mixedTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="@string/mixed_feeding"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<ImageView
android:id="@+id/mixedArrow"
android:layout_width="12dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="30dp"
android:src="@drawable/arrow_right_white" />
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/nutritionOralCare"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:clickable="false"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/oralSub"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="60dp"
android:orientation="vertical"
android:visibility="gone" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/TextView09"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="1dp"
android:background="#EDEDED" >
<TextView
android:id="@+id/TextView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="SUB MENU 1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/my_yellow" />
</RelativeLayout>
</LinearLayout>
<RelativeLayout
android:id="@+id/oralLayout"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="@color/my_yellow"
android:clickable="true"
android:onClick="openNutrition"
android:tag="oral" >
<TextView
android:id="@+id/oralTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:text="@string/oral_care_caps"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="@color/white" />
<ImageView
android:id="@+id/oralArrow"
android:layout_width="12dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="30dp"
android:src="@drawable/arrow_right_white" />
</RelativeLayout>
</RelativeLayout>
</LinearLayout>
</ScrollView>
更改和动画视图的方法：
public void openNutrition(View view) {
String viewTag = view.getTag().toString();
if (viewTag.equals("wet")) {
nutrition = (RelativeLayout) findViewById(R.id.wetLayout);
nutritionSub = (LinearLayout) findViewById(R.id.wetSub);
nutritionTitle = (TextView) findViewById(R.id.wetTitle);
nutritionArrow = (ImageView) findViewById(R.id.wetArrow);
animate();
}
else if (viewTag.equals("dry")) {
nutrition = (RelativeLayout) findViewById(R.id.dryLayout);
nutritionSub = (LinearLayout) findViewById(R.id.drySub);
nutritionTitle = (TextView) findViewById(R.id.dryTitle);
nutritionArrow = (ImageView) findViewById(R.id.dryArrow);
animate();
}
else if (viewTag.equals("mixed")) {
nutrition = (RelativeLayout) findViewById(R.id.mixedLayout);
nutritionSub = (LinearLayout) findViewById(R.id.mixedSub);
nutritionTitle = (TextView) findViewById(R.id.mixedTitle);
nutritionArrow = (ImageView) findViewById(R.id.mixedArrow);
animate();
}
else if (viewTag.equals("oral")) {
nutrition = (RelativeLayout) findViewById(R.id.oralLayout);
nutritionSub = (LinearLayout) findViewById(R.id.oralSub);
nutritionTitle = (TextView) findViewById(R.id.oralTitle);
nutritionArrow = (ImageView) findViewById(R.id.oralArrow);
animate();
}
else if (viewTag.equals("changeMix")) {
nutrition = (RelativeLayout) findViewById(R.id.changeMixLayout);
nutritionSub = (LinearLayout) findViewById(R.id.foodTypeLayout);
nutritionTitle = (TextView) findViewById(R.id.changeMixText);
nutritionArrow = (ImageView) findViewById(R.id.changeMixArrow);
animate();
}
}
private void animate() {
if (nutritionSub.getVisibility() == View.GONE) {
nutritionSub.setVisibility(View.VISIBLE);
nutrition.setBackgroundColor(getResources().getColor(R.color.white));
nutritionTitle.setTextColor(getResources().getColor(
R.color.my_yellow));
nutritionArrow.setImageDrawable(getResources().getDrawable(
R.drawable.arrow_right_orange));
r = new RotateAnimation(currentPos, degrees,
Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
/* Setting arrow animation properties */
setArrowAnimation();
Animation slideDown = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_down);
nutritionArrow.startAnimation(r);
nutritionSub.startAnimation(slideDown);
} else {
nutrition.setBackgroundColor(getResources().getColor(
R.color.my_yellow));
nutritionTitle.setTextColor(getResources().getColor(R.color.white));
nutritionArrow.setImageDrawable(getResources().getDrawable(
R.drawable.arrow_right_white));
r = new RotateAnimation(degrees, currentPos,
Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
/* Setting arrow animation properties */
setArrowAnimation();
Animation slideUp = AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.slide_up);
slideUp.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
nutritionSub.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
nutritionArrow.startAnimation(r);
nutritionSub.startAnimation(slideUp);
}
}
private void setArrowAnimation() {
r.setInterpolator(new LinearInterpolator());
r.setDuration(500);
r.setFillEnabled(true);
r.setFillAfter(true);
}
nutrition，nutritionSub，nutritionTitle，nutritionArrow被声明为全局私有变量
更新
在扩展Fragment和OnPageChangeListener方法onPageSelected()的我的片段类上运行日志，表明标记设置正确且可见。这个问题似乎与片段的生命周期有关，因为只有当我翻阅ALL三个片段然后返回到第二个片段时才会发生对文本和图像的更改。
设置寻呼机：
List<Fragment> fragments = getFragments();
pageAdapter = new NutritionPageAdapter(getSupportFragmentManager(),
fragments);
ViewPager pager = (ViewPager) findViewById(R.id.viewpager);
pager.setAdapter(pageAdapter);
getFragments()
private List<Fragment> getFragments() {
List<Fragment> fList = new ArrayList<Fragment>();
fList.add(NutritionFragment.newInstance("Menu"));
fList.add(NutritionFragment.newInstance("Nutrition"));
fList.add(NutritionFragment.newInstance("Transition"));
return fList;
}
我的Fragment班
public static final String FRAGMENT_TITLE = "FRAGMENT_TITLE";
private View v;
public static final NutritionFragment newInstance(String string) {
NutritionFragment f = new NutritionFragment();
Bundle b = new Bundle(1);
b.putString(FRAGMENT_TITLE, string);
f.setArguments(b);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
String screen = getArguments().getString(FRAGMENT_TITLE);
if (screen.equals("Menu")) {
v = inflater.inflate(R.layout.nutrition_menu_activity_layout,
container, false);
} else if (screen.equals("Transition")) {
v = inflater.inflate(R.layout.nutrition_transition_activity_layout,
container, false);
} else {
v = inflater.inflate(R.layout.nutrition_nutrition_activity_layout,
container, false);
}
return v;
}