ImageSlider in android showing error

Question

The image slider works fine until i do not load images in the array. That is:

int imageId[]={


};

But as soon as i do this:

int imageId[]={
        R.drawable.mi

};

Let us that I have an activity A which has an image. Now, If i Long press on that image,Another Activity B should start. But the android app closes abruptly.

Here is my Activity code:

package com.example.hotel_app_regularuser;

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.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

public class PageTwo extends Activity {
 ViewPager vpager;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_page_two);
  vpager = (ViewPager) findViewById(R.id.viewPager);
  PagerAdapter adapter = new customAdapter(PageTwo.this);
  vpager.setAdapter(adapter);

 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.page_two, menu);
  return true;
 }

}


class customAdapter extends PagerAdapter {
 Context context;
 int imageId[] = {
  R.drawable.mi

 };
 public customAdapter(Context context) {
  this.context = context;
 }



 public Object InstantiateItem(ViewGroup container, int item) {

  LayoutInflater inflater = ((Activity) context).getLayoutInflater();
  View viewitem = inflater.inflate(R.layout.activity_page_two, container, false);
  ImageView im = (ImageView) viewitem.findViewById(R.id.imageView1);
  im.setImageResource(imageId[item]);
  TextView textView1 = (TextView) viewitem.findViewById(R.id.textView1);
  textView1.setText("hi");
  ((ViewPager) container).addView(viewitem);

  return viewitem;
 }
 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return imageId.length;
 }

 @Override
 public boolean isViewFromObject(View arg0, Object arg1) {
  // TODO Auto-generated method stub
  return arg0 == ((View) arg1);
 }
 @Override
 public void destroyItem(ViewGroup container, int position, Object object) {
  // TODO Auto-generated method stub
  ((ViewPager) container).removeView((View) object);
 }

}

Answer 1

I just found out that in this line:

View viewitem=inflater.inflate(R.layout.activity_page_two,container,false);

i was writing:

View `viewitem=inflater.inflate(R.layout.activity_commonpreferences,container,false);`

Also, as @ Ashish Ranjan pointed out, i changed

public Object InstantiateItem(ViewGroup container, int item) {

to

@Override
public Object instantiateItem(ViewGroup container, int position) {

Changing these helped run my app smoothly.

Answer 2

Change :

public Object InstantiateItem(ViewGroup container, int item) {

to :

@Override
public Object instantiateItem(ViewGroup container, int position) {

in your code and it will solve the problem.

i.e, add @Override and change the method name to instantiateItem from InstantiateItem

Answer 3

Just add @Override key word like i added in InstantiateItem() method.

 @Override
 public Object InstantiateItem(ViewGroup container, int item) {

  LayoutInflater inflater = ((Activity) context).getLayoutInflater();
  View viewitem = inflater.inflate(R.layout.activity_common_preferences, container, false);
  ImageView im = (ImageView) viewitem.findViewById(R.id.imageView1);
  im.setImageResource(imageId[item]);
  TextView textView1 = (TextView) viewitem.findViewById(R.id.textView1);
  textView1.setText("hi");
  ((ViewPager) container).addView(viewitem);

  return viewitem;
 }