在图像viewpager中的每个图像下添加文本说明

时间:2012-11-28 17:54:15

标签: java android android-viewpager layout-inflater

由于galley类已弃用,所以我尝试用viewpager类替换它,我已经创建了图像viewpager 并且运行良好。

现在我想尝试在每个图片下添加文字说明,我搜索了大量没有结果,我尝试使用 LayoutInflater 自定义布局但没有结束,它没有显示文字。

注意:这是第一次使用viewpager并尝试自定义它,所以我的代码下面试图填充布局并使用viewpager自定义它,可能是错误的或需要更多调整,因为没有经验。

任何建议都将得到赞赏,谢谢。

我的代码:

ImagePager:

 public class ImagePager extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ImagePagerAdapter adapter = new ImagePagerAdapter(this, imageArra);
    ViewPager myPager = (ViewPager) findViewById(R.id.myimagepager);
    myPager.setAdapter(adapter);
    myPager.setCurrentItem(0);}

      private int imageArra[] = { R.drawable.a, R.drawable.b, R.drawable.c,
                       R.drawable.d, R.drawable.e, R.drawable.f,
                                 R.drawable.g, R.drawable.h, R.drawable.i, 
                                 R.drawable.j, R.drawable.k};}

ImagePagerAdapter:

  public class ImagePagerAdapter extends PagerAdapter {

Activity activity;
int imageArray[];

public ImagePagerAdapter(Activity act, int[] imgArra) {
    imageArray = imgArra;
    activity = act;   }

public int getCount() {
    return imageArray.length;   }

public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater)collection.getContext().
          getSystemService (Context.LAYOUT_INFLATER_SERVICE);
    View layout = inflater.inflate(R.layout.custom_pager, null);

    layout.findViewById(R.id.caption);

 ImageView view = new ImageView(activity);                      
    view.setPadding(5, 25, 5, 5);
    view.setScaleType(ScaleType.FIT_START);
    view.setBackgroundColor(Color.RED);
    ((ViewPager) collection).addView(view, 0);
    return view;   }

@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
    ((ViewPager) arg0).removeView((View) arg2);   }

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
    return arg0 == ((View) arg1);   }

@Override
public Parcelable saveState() {
    return null;   }
                }

2 个答案:

答案 0 :(得分:2)

这里

public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater)collection.getContext().getSystemService
             (Context.LAYOUT_INFLATER_SERVICE);
    View layout = inflater.inflate(R.layout.custom_pager, null);

    layout.findViewById(R.id.caption);

 ImageView view = new ImageView(activity);                      
    view.setPadding(5, 25, 5, 5);
    view.setScaleType(ScaleType.FIT_START);
    view.setBackgroundColor(Color.RED);
    ((ViewPager) collection).addView(view, 0);
    return view;   }

cutome_pager设计您的视图。

<?xml version="1.0" encoding="utf-8"?>

<ImageView
    android:id="@+id/gallery_imageView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />

<TextView
    android:id="@+id/gallery_imageView_dsc"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:text="Hello...." />

public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater)collection.getContext().getSystemService
             (Context.LAYOUT_INFLATER_SERVICE);
    View layout = inflater.inflate(R.layout.custom_pager, null);

                    ImageView im=(ImageView) layout.findViewById(R.id.gallery_imageView);
                    im.setBackgroundColor(Color.RED);
                    TextView dsc=(TextView) layout.findViewById(R.id.gallery_imageView_dsc);
                    ((ViewPager) collection).addView(layout, 0);
                    return layout;   }

答案 1 :(得分:0)

instantiateItem()方法中,您创建ImageView并将其添加到查看寻呼机并返回它。在此方法中,创建一个具有垂直方向的LinearLayout,然后为描述创建一个ImageView和一个TextView,然后将ImageViewTextView添加到{ {1}}以及添加LineaLayout以查看寻呼机并返回LinearLayout ..