学習日記--viewpager簡単テスト
2920 ワード
一、javaコード
二、layoutレイアウトファイル
package com.hxzy.viewpagetest;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnScrollChangeListener;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity {
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mViewPager = (ViewPager) findViewById(R.id.viewPager);
MyAdapter adapter = new MyAdapter(this);
mViewPager.setAdapter(adapter);
mViewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int position, float arg1, int arg2) {
if (position == 1 && arg1 > 0) {
mViewPager.setCurrentItem(0);
}
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
}
private class MyAdapter extends PagerAdapter {
private Context context;
private ArrayList<ImageView> data;
private int[] images;
public MyAdapter(Context context) {
this.context = context;
data = new ArrayList<ImageView>();
images = new int[] { R.drawable.b, R.drawable.c, R.drawable.d };
for (int i = 0; i < images.length; i++) {
ImageView image = new ImageView(getApplicationContext());
image.setImageResource(images[i]);
data.add(image);
}
}
@Override
public int getCount() {
return data.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(data.get(position));
}
@Override
public View instantiateItem(ViewGroup container, int position) {
container.addView(data.get(position));
return data.get(position);
}
}
}
二、layoutレイアウトファイル
<RelativeLayout 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"
tools:context="com.hxzy.viewpagetest.MainActivity" >
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>