更新
据我所读,您想要像这样的过渡效果。如下所示实现了一个ViewPager.PageTransformer
。
这里是ViewPager.PageTransformer
类:
public class RotationCircleTransformer implements ViewPager.PageTransformer {
public RotationCircleTransformer() {
}
public void transformPage(View view, float position) {
int pageWidth = view.getWidth();
int pageHeight = view.getHeight();
view.setPivotX((float) pageWidth);
view.setPivotY((float) pageHeight);
if (position < -1) {
view.setRotation(0);
view.setAlpha(0);
} else if (position <= 1) {
view.setTranslationX((-position) * pageWidth);
view.setRotation(position * (90));
view.setAlpha(Math.max(1, 1 - Math.abs(position) / 3));
} else {
view.setRotation(0);
view.setAlpha(0);
}
}
}
background_quarter.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<size android:height="300dp" android:width="300dp"/>
<solid android:color="#00F"/>
<corners android:topLeftRadius="300dp" android:topRightRadius="0dp" android:bottomRightRadius="0dp" android:bottomLeftRadius="0dp"/>
</shape>
activity_circle_pager.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.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_gravity="center"
android:layout_width="300dp"
android:layout_height="300dp" />
</FrameLayout>
fragment_content.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="300dp"
android:layout_height="300dp"
android:id="@+id/bg"
android:background="@drawable/background_quarter">
<TextView
android:id="@+id/text"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textSize="40dp"
android:textColor="@android:color/white"
android:text="" />
</FrameLayout>
CircleFragment.class
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;
public class CircleFragment extends Fragment {
private String typeString;
public CircleFragment() {
}
public static CircleFragment newInstance(String type) {
CircleFragment fragment = new CircleFragment();
Bundle args = new Bundle();
args.putString("type", type);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
typeString = getArguments().getString("type","1");
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_content, container, false);
;
TextView text = (TextView) view.findViewById(R.id.text);
FrameLayout bg = (FrameLayout) view.findViewById(R.id.bg);
switch (typeString) {
case "1":
bg.setBackgroundDrawable(ContextCompat.getDrawable(getContext(), R.drawable.background_quarter));
break;
case "2":
bg.setBackgroundDrawable(ContextCompat.getDrawable(getContext(), R.drawable.background_quarter));
break;
case "3":
bg.setBackgroundDrawable(ContextCompat.getDrawable(getContext(), R.drawable.background_quarter));
break;
case "4":
bg.setBackgroundDrawable(ContextCompat.getDrawable(getContext(), R.drawable.background_quarter));
break;
}
text.setText(typeString);
return view;
}
}
CirclePagerActivity.class
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import java.util.ArrayList;
import java.util.List;
public class CirclePagerActivity extends AppCompatActivity {
ViewPager mPager;
CirclePagerAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_circle_pager);
mPager = (ViewPager) findViewById(R.id.pager);
List<Fragment> fragments = new ArrayList<>();
fragments.add(ContentFragment.newInstance("1"));
fragments.add(ContentFragment.newInstance("2"));
fragments.add(ContentFragment.newInstance("3"));
fragments.add(ContentFragment.newInstance("4"));
mAdapter = new CirclePagerAdapter(getSupportFragmentManager(), fragments);
mPager.setAdapter(mAdapter);
mPager.setPageTransformer(true, new RotationCircleTransformer());
}
@Override
protected void onDestroy() {
super.onDestroy();
}
static class CirclePagerAdapter extends FragmentStatePagerAdapter {
List<Fragment> mFrags = new ArrayList<>();
public CirclePagerAdapter(FragmentManager fm, List<Fragment> frags) {
super(fm);
mFrags = frags;
}
@Override
public Fragment getItem(int position) {
int index = position % mFrags.size();
return mFrags.get(index);
}
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
}
}
如果您找不到适合的
ViewPager
转换动画,可以自己实现
ViewPager.PageTransformer
。
这里 提供了很多信息和多个示例。
此外,
在这里 您还可以找到一个有用的教程。
您能详细解释一下这部分吗?我将根据您的解释更新我的答案(视觉说明更佳)。
绕其宽度(getWidth())和高度(getHeight())轴旋转。
(注:此处为回答,没有可供展示的视觉说明)该句话意思是物体会绕着它的宽度和高度轴进行旋转。其中,getWidth() 和 getHeight() 是获取视图宽度和高度的方法。