对于我的程序,我决定做一个像登录页面那样的火种,顶部有一个可跳过的屏幕部分,底部有一个静态部分,它将容纳Facebook登录按钮。
我设法让刷卡独立工作,以及按钮的登录功能。但是,当我尝试在同一页面上包含这两个功能时,它既不会显示Viewpager,也不会简单地崩溃。
我认为它在我的xml中,但我不完全确定如何继续。
主要活动XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="fill_parent">
<android.support.v4.view.ViewPager
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="350dp"
tools:context=".ScreenSliderActivity"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<fragment
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:name="com.Focalpoint.Views.LoginButtonFragment"
android:id="@+id/fragment"
tools:layout="@layout/login_section_fragment"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/view_pager" />
</RelativeLayout>
登录按钮XML:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".LoginActivity" >
<TextView
android:id="@+id/text_details"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/login_button"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
<com.facebook.login.widget.LoginButton
android:id="@+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:layout_marginBottom="48dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</FrameLayout>
ScreenSliderActivity:
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
public class ScreenSliderActivity extends FragmentActivity{
/** paper widget which handles the animation */
private ViewPager mviewPager;
/** paper widget which supplies the pages to the view page */
private PagerAdapter mpagerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
mviewPager = (ViewPager) findViewById(R.id.view_pager);
mpagerAdapter = new
ScreenSlidePagerAdapter(getSupportFragmentManager());
mviewPager.setAdapter(mpagerAdapter);
mviewPager.setCurrentItem(0);
}
}
class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch(position) {
case 0:
return new FirstTutorialFragment();
case 1:
return new SecondTutorialFragment();
}
return null;
}
@Override
public int getCount() {
return 2;
}
}