[我正在使用pageradapter和viewpager来显示imageview数组,textview数组。但是如何单击按钮时删除传呼器。下面代码中的整个代码,但是我在xml中添加了按钮onclick应该删除页面。
https://www.swipetips.com/android-viewpager-gallery-images-and-texts-tutorial/
package com.androidbegin.viewpagertutorial;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class ViewPagerAdapter extends PagerAdapter {
// Declare Variables
Context context;
String[] rank;
String[] country;
String[] population;
int[] flag;
LayoutInflater inflater;
public ViewPagerAdapter(Context context, String[] rank, String[] country,
String[] population, int[] flag) {
this.context = context;
this.rank = rank;
this.country = country;
this.population = population;
this.flag = flag;
}
@Override
public int getCount() {
return rank.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((RelativeLayout) object);
}
@Override
public Object instantiateItem(final ViewGroup container, final int position) {
// Declare Variables
TextView txtrank;
TextView txtcountry;
TextView txtpopulation;
ImageView imgflag;
Button b;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.viewpager_item, container,
false);
// Locate the TextViews in viewpager_item.xml
txtrank = (TextView) itemView.findViewById(R.id.rank);
txtcountry = (TextView) itemView.findViewById(R.id.country);
txtpopulation = (TextView) itemView.findViewById(R.id.population);
b=(Button)itemView.findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
}
});
// Capture position and set to the TextViews
txtrank.setText(rank[position]);
txtcountry.setText(country[position]);
txtpopulation.setText(population[position]);
// Locate the ImageView in viewpager_item.xml
imgflag = (ImageView) itemView.findViewById(R.id.flag);
// Capture position and set to the ImageView
imgflag.setImageResource(flag[position]);
// Add viewpager_item.xml to ViewPager
((ViewPager) container).addView(itemView);
return itemView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
// Remove viewpager_item.xml from ViewPager
((ViewPager) container).removeView((RelativeLayout) object);
}
}
/////////////////////
// Locate the ViewPager in viewpager_main.xml
viewPager = (ViewPager) findViewById(R.id.pager);
// Pass results to ViewPagerAdapter Class
adapter = new ViewPagerAdapter(MainActivity.this, rank, country, population, flag);
// Binds the Adapter to the ViewPager
viewPager.setAdapter(adapter);
List
。秒你需要 @Override
public int getItemPosition(Object object){
return PagerAdapter.POSITION_NONE;
}
强制适配器每次创建新页面,而不在内存页面中使用。
public class ViewPagerAdapter extends PagerAdapter { // Declare Variables Context context; List<String> rank; List<String> country; List<String> population; List<Integer> flag = new ArrayList<Integer>(); LayoutInflater inflater; public ViewPagerAdapter(Context context, String[] rank, String[] country, String[] population, int[] flag) { this.context = context; this.rank = new ArrayList<String>(Arrays.asList(rank)); this.country = new ArrayList<String>(Arrays.asList(country)); this.population = new ArrayList<String>(Arrays.asList(population)); for (int i : flag){ this.flag.add(i); } } @Override public int getCount() { return rank.size(); } @Override public boolean isViewFromObject(View view, Object object) { return view == ((RelativeLayout) object); } @Override public Object instantiateItem(ViewGroup container, int position) { // Declare Variables TextView txtrank; TextView txtcountry; TextView txtpopulation; ImageView imgflag; inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); View itemView = inflater.inflate(R.layout.viewpager_item, container, false); // Locate the TextViews in viewpager_item.xml txtrank = (TextView) itemView.findViewById(R.id.rank); txtcountry = (TextView) itemView.findViewById(R.id.country); txtpopulation = (TextView) itemView.findViewById(R.id.population); Button b=(Button)itemView.findViewById(R.id.button1); final int delPosition = position; b.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { rank.remove(delPosition); country.remove(delPosition); population.remove(delPosition); flag.remove(delPosition); notifyDataSetChanged(); } }); // Capture position and set to the TextViews txtrank.setText(rank.get(position)); txtcountry.setText(country.get(position)); txtpopulation.setText(population.get(position)); // Locate the ImageView in viewpager_item.xml imgflag = (ImageView) itemView.findViewById(R.id.flag); // Capture position and set to the ImageView imgflag.setImageResource(flag.get(position)); // Add viewpager_item.xml to ViewPager ((ViewPager) container).addView(itemView); return itemView; } @Override public void destroyItem(ViewGroup container, int position, Object object) { // Remove viewpager_item.xml from ViewPager ((ViewPager) container).removeView((RelativeLayout) object); } @Override public int getItemPosition(Object object){ return PagerAdapter.POSITION_NONE; } }