Java 如何在特定的ViewPager页面上隐藏视图?请看详情
有一个Java 如何在特定的ViewPager页面上隐藏视图?请看详情,java,android,android-viewpager,android-xml,Java,Android,Android Viewpager,Android Xml,有一个ImageView,实际上是一个右箭头。我正在使用它浏览ViewPager的页面 我想要的是在导航到查看页面的最后一(6)页时,立即隐藏此图像视图(右箭头) 以下是我迄今为止为实现这一目标所做的工作: protected void onCreate(Bundle savedInstanceState) { requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowMan
ImageView
,实际上是一个右箭头。我正在使用它浏览ViewPager
的页面
我想要的是在导航到查看页面的最后一(6)页时,立即隐藏此图像视图(右箭头)
以下是我迄今为止为实现这一目标所做的工作:
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_walkthroughs);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
ImageView imageView = (ImageView) findViewById(R.id.right_arrow);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mViewPager.setCurrentItem(mViewPager.getCurrentItem() + 1);
}
});
**here is my code**
if (mViewPager.getCurrentItem() == 6) {
imageView.setVisibility(View.GONE);
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical">
<android.support.design.widget.CoordinatorLayout
android:id="@+id/main_content"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.abc.xyz.Walkthroughs">
<android.support.v4.view.ViewPager
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="@color/colorPrimary">
<View
android:layout_width="1dp"
android:layout_height="@dimen/viewpagerindicator_height"
android:background="@android:color/white"
android:layout_alignParentTop="true"
android:layout_alignLeft="@+id/right_arrow"
android:layout_alignStart="@+id/right_arrow"/>
<ImageView
android:id="@+id/right_arrow"
android:layout_width="wrap_content"
android:layout_height="@dimen/viewpagerindicator_height"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="@drawable/btn_touch_feedback_impression"
android:src="@drawable/ic_action_right_arrow"/>
</RelativeLayout>
</RelativeLayout>
这里是活动\u walkthroughs.xml
文件代码:
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_walkthroughs);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
ImageView imageView = (ImageView) findViewById(R.id.right_arrow);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mViewPager.setCurrentItem(mViewPager.getCurrentItem() + 1);
}
});
**here is my code**
if (mViewPager.getCurrentItem() == 6) {
imageView.setVisibility(View.GONE);
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical">
<android.support.design.widget.CoordinatorLayout
android:id="@+id/main_content"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.abc.xyz.Walkthroughs">
<android.support.v4.view.ViewPager
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="@color/colorPrimary">
<View
android:layout_width="1dp"
android:layout_height="@dimen/viewpagerindicator_height"
android:background="@android:color/white"
android:layout_alignParentTop="true"
android:layout_alignLeft="@+id/right_arrow"
android:layout_alignStart="@+id/right_arrow"/>
<ImageView
android:id="@+id/right_arrow"
android:layout_width="wrap_content"
android:layout_height="@dimen/viewpagerindicator_height"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="@drawable/btn_touch_feedback_impression"
android:src="@drawable/ic_action_right_arrow"/>
</RelativeLayout>
</RelativeLayout>
问题是这段代码不起作用
请让我知道问题出在哪里
提前感谢。使用以下代码修改您的代码:-
mViewPager.setOnPageChangeListener(new OnPageChangeListener() {
public void onPageScrollStateChanged(int state) {}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
public void onPageSelected(int position) {
// Check if this is the page you want.
}
});
并在onPageSelected()
方法中检查您的情况。谢谢
你的回答给了我找到正确方法的线索
以下是我在mviewpage.addOnPageChangeListener()中所做的操作
不过这很容易
和平。尝试此演示隐藏或显示您的页面找到下面的答案。只需将您的可见代码移到OnPageChangeListener中即可解决问题。如果您的案例仅在创建时执行,Nigams答案正确,请将代码移到OnPageChangeListener
@NigamPatro中,无需对您的答案发表评论,OP会被自动通知。此代码导致2个问题:-1-它隐藏了ViewPager
的指示器。2-从上一页向后滚动到上一页时,ImageView
不会再次出现。您需要在onPageSelected()
中设置此隐藏、取消隐藏的条件。