Viewpager的无限轮播
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package com.example.test;
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
public class MainActivity extends Activity {
private List<View> list;
public void handleMessage(android.os.Message msg) {
int i = vp.getCurrentItem();
vp.setCurrentItem(++i);
h.sendEmptyMessageDelayed(1, 1000);
};
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
vp=(ViewPager) findViewById(R.id.vp);
init();
vp.setAdapter(new MyAdapter());
vp.setCurrentItem(Integer.MAX_VALUE/2-Integer.MAX_VALUE/2%list.size());
h.sendEmptyMessageDelayed(1, 1000);
}
//定义适配器
class MyAdapter extends PagerAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0==arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
System.out.println(position);
container.addView(list.get(position%list.size()));
return list.get(position%list.size());
}
}
//加载页面资源
public void init(){
list=new ArrayList<View>();
list.add(View.inflate(this, R.layout.vp1, null));
list.add(View.inflate(this, R.layout.vp2, null));
list.add(View.inflate(this, R.layout.vp3, null));
list.add(View.inflate(this, R.layout.vp4, null));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
public class MainActivity extends Activity {
private List<View> list;
private ViewPager vp;
//handler
public void handleMessage(android.os.Message msg) {
int i = vp.getCurrentItem();
vp.setCurrentItem(++i);
h.sendEmptyMessageDelayed(1, 1000);
};
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
vp=(ViewPager) findViewById(R.id.vp);
init();
vp.setAdapter(new MyAdapter());
vp.setCurrentItem(Integer.MAX_VALUE/2-Integer.MAX_VALUE/2%list.size());
h.sendEmptyMessageDelayed(1, 1000);
}
//定义适配器
class MyAdapter extends PagerAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0==arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
System.out.println(position);
container.addView(list.get(position%list.size()));
return list.get(position%list.size());
}
}
//加载页面资源
public void init(){
list=new ArrayList<View>();
list.add(View.inflate(this, R.layout.vp1, null));
list.add(View.inflate(this, R.layout.vp2, null));
list.add(View.inflate(this, R.layout.vp3, null));
list.add(View.inflate(this, R.layout.vp4, null));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
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