- 首先我们来看看运行之后的效果:
然后我们也不多说废话了,下面是这个项目所需要的全部代码,很多博主写这个都不把代码写完,因此笔者自己也琢磨了一会儿才把这个弄出来,感觉很烦,但我肯定会把代码写全的。我这里一共引入了三个界面,三个布局的xml我都会写的。
1.MainActivity.java
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {
private ViewPager vpager_one;
private ArrayList<View> aList;
private MyPagerAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
vpager_one = (ViewPager) findViewById(R.id.vpager_one); aList = new ArrayList<View>();
LayoutInflater li = getLayoutInflater();
aList.add(li.inflate(R.layout.view_one,null,false));
aList.add(li.inflate(R.layout.view_two,null,false));
aList.add(li.inflate(R.layout.view_three,null,false));
mAdapter = new MyPagerAdapter(aList);
vpager_one.setAdapter(mAdapter);
}
}
2.MypagerAdapter.java
这个是ViewPager的适配器,和listview所需要的适配器差不多,是我们创建的新类。
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;import java.util.ArrayList;public class MyPagerAdapter extends PagerAdapter { private ArrayList<View> viewLists; public MyPagerAdapter() {
} public MyPagerAdapter(ArrayList<View> viewLists) {
super();
this.viewLists = viewLists;
} @Override
public int getCount() {
return viewLists.size();
} @Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
} @Override
public Object instantiateItem(ViewGroup container, int position) {
container.addView(viewLists.get(position));
return viewLists.get(position);
} @Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(viewLists.get(position));
}
}
3.activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
tools:context=".MainActivity"> <android.support.v4.view.ViewPager
android:id="@+id/vpager_one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" /></android.support.constraint.ConstraintLayout>
4.view_one
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFBA55"
android:gravity="center"
android:orientation="vertical"> <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="第一个Page"
android:textColor="#000000"
android:textSize="18sp"
android:textStyle="bold" /></LinearLayout>
5.view_two
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFBA55"
android:gravity="center"
android:orientation="vertical"> <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="第二个Page"
android:textColor="#000000"
android:textSize="18sp"
android:textStyle="bold" /></LinearLayout>
6.view_three
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFBA55"
android:gravity="center"
android:orientation="vertical"> <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="第三个Page"
android:textColor="#000000"
android:textSize="18sp"
android:textStyle="bold" />
</LinearLayout>
得解,就这么简单。我真是不知道其他博主为啥不把代码写全,尤其是每个viewpager的布局,连说都不说下有三个布局,真实让人头大。