Aktivität keine umschließenden Klasse

Question

public Object instantiateItem(ViewGroup container, int position) { 
    Context context = FullImageActivity.this; // i get error in this line that its not an enclosing class 

ich wollen einfach FullImageActivity zu ImageAdapter Klasse nennen

ImageAdapter Klasse

public class ImageAdapter extends PagerAdapter { 

    public String mImages[] = {("http://www.fashionlady.in/wp-content/uploads/2016/03/creative-punjabi-mehndi-design-2016.jpg"), 
      ("https://lumiere-a.akamaihd.net/v1/images/uk_toystory_chi_woody_n_5b5a006f.png?region=0,0,300,300"), 
      ("https://lumiere-a.akamaihd.net/v1/images/open-uri20150422-20810-10n7ovy_9b42e613.jpeg"), 
      ("http://www.wetpaint.com/wp-content/uploads/2015/11/toy-story-20th-anniversary.jpg"), 
      ("http://i.imgur.com/4IZMjx3.jpg")}; 

    @Override 
    public int getCount() { 
     return mImages.length; 
    } 

    @Override 
    public boolean isViewFromObject(View view, Object object) { 
     return view == ((ImageView) object); 
    } 

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

     Context context = FullImageActivity.this; 
     ImageView imageView = new ImageView(context); 

     imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 
     Picasso.with(context).load(mImages[position]).placeholder(R.drawable.loading2).error(R.drawable.nointernet).into(imageView); 
     ((ViewPager) container).addView(imageView, 0); 
     return imageView; 
    } 

    @Override 
    public void destroyItem(ViewGroup container, int position, Object object) { 
     ((ViewPager) container).removeView((ImageView) object); 
    } 
} 

Das ist mein FullImageActivity Klasse

public class FullImageActivity extends AppCompatActivity { 

    TouchImageView img; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setTitle("ViewPager"); 

     setContentView(R.layout.activity_full_image); 

     Intent i = getIntent(); 
     TouchImageView img = new TouchImageView(this); 

     int position = i.getExtras().getInt("id"); 
     ImageAdapter adapter = new ImageAdapter(); 


     img = (TouchImageView) findViewById(R.id.img); 
     img.setMaxZoom(4f); 
     Picasso.with(getApplicationContext()).load(adapter.mImages[position]).into(img); 
     ViewPager viewPager = (ViewPager) findViewById(R.id.pager); 
     viewPager.setAdapter(adapter); 
} 

Answer 1

Ihr Adapter Class

public class ImageAdapter extends PagerAdapter { 

    Context activity_context; 
    public String mImages[] = {("http://www.fashionlady.in/wp-content/uploads/2016/03/creative-punjabi-mehndi-design-2016.jpg"), 
      ("https://lumiere-a.akamaihd.net/v1/images/uk_toystory_chi_woody_n_5b5a006f.png?region=0,0,300,300"), 
      ("https://lumiere-a.akamaihd.net/v1/images/open-uri20150422-20810-10n7ovy_9b42e613.jpeg"), 
      ("http://www.wetpaint.com/wp-content/uploads/2015/11/toy-story-20th-anniversary.jpg"), 
      ("http://i.imgur.com/4IZMjx3.jpg")}; 
    public ImageAdapter(Context context) 
    { 
      activity_context=context; 
    } 
    @Override 
    public int getCount() { 
     return mImages.length; 
    } 

    @Override 
    public boolean isViewFromObject(View view, Object object) { 
     return view == ((ImageView) object); 
    } 

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


     ImageView imageView = new ImageView(activity_context); 

     imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 
     Picasso.with(activity_context).load(mImages[position]).placeholder(R.drawable.loading2).error(R.drawable.nointernet).into(imageView); 
     ((ViewPager) container).addView(imageView, 0); 
     return imageView; 
    } 

    @Override 
    public void destroyItem(ViewGroup container, int position, Object object) { 
     ((ViewPager) container).removeView((ImageView) object); 
    } 
} 

Ihre Aktivitätsklasse

public class FullImageActivity extends AppCompatActivity { 

    TouchImageView img; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setTitle("ViewPager"); 

     setContentView(R.layout.activity_full_image); 

     Intent i = getIntent(); 
     TouchImageView img = new TouchImageView(this); 

     int position = i.getExtras().getInt("id"); 
     ImageAdapter adapter = new ImageAdapter(FullImageActivity.this); 


     img = (TouchImageView) findViewById(R.id.img); 
     img.setMaxZoom(4f); 
     Picasso.with(getApplicationContext()).load(adapter.mImages[position]).into(img); 
     ViewPager viewPager = (ViewPager) findViewById(R.id.pager); 
     viewPager.setAdapter(adapter); 
}