在我的活动中,我得到了应该以幻灯片形式显示的图像列表,
now现在应该显示的图像列表来自JSON,所以我解析了json并获得了我需要从Appfolder / app_content中显示的图像列表
我有课程:
MainActivity:
public class MainActivity extends Activity {
ArrayList<String> imageSlideList = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Get Intent- Extra
Intent intent = getIntent();
String swpImgSImgs = intent.getStringExtra("swpImgS");
try {
JSONArray array = new JSONArray(swpImgSImgs);
for (int i = 0 ; i< array.length(); i++){
String imageList = array.getString(i);
FileOperation fo= new FileOperation();
File dir=fo.createFileManagerInsidePackage(AppContext.getAppContext());
String imagePath = dir+"/"+imageList;
imageSlideList.add(imagePath);
}
} catch (JSONException e) {
e.printStackTrace();
}
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImageAdapter adapter = new ImageAdapter(this);
viewPager.setAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
return false;
}
}
适配器:
public class SwipingImageSlidesAdapter extends PagerAdapter {
Context context;
//I need to use files that are in json
private int[] GalImages = new int[] {
R.drawable.camera,
R.drawable.camera
};
SwipingImageSlidesAdapter(Context context){
this.context=context;
}
@Override
public int getCount() {
return GalImages.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(context);
int padding = context.getResources().getDimensionPixelSize(R.dimen.activity_horizontal_margin);
imageView.setPadding(padding, padding, padding, padding);
imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
imageView.setImageResource(GalImages[position]);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
}
现在我需要做什么更改才能显示来自Application-folder(App / app_content)的图像而不是使用我在MainActivity中创建{Array}的ArrayList的R.id.imageName?
答案 0 :(得分:1)
你可以像arraylist一样从
获取图像imageView.setImageResource((int)aimageSlideList.get(position));
传递适配器类
中的arraylistprivate ArrayList<String> aimageSlideList=null;
private LayoutInflater mInflater=null;
public SwipingImageSlidesAdapter (Activity context,ArrayList<String> aimageSlideList) {
super(context, 0);
mInflater = context.getLayoutInflater();
this.aimageSlideList=aimageSlideList;
}
答案 1 :(得分:1)
将路径列表传递给适配器的构造函数。
ImageAdapter adapter = new ImageAdapter(this,imageSlideList)
然后在Adapter
中 ArrayList<String> mList;
SwipingImageSlidesAdapter(Context context,ArrayList<String> list){
this.context=context;
mList = list;
}
然后在getView
中 Bitmap b = BitmapFactory.decodeFile(mlist.get(position));
imageView.setImageBitmap(b);
public static Bitmap decodeFile (String pathName)
将文件路径解码为位图。如果指定的文件名为null,或者无法解码为位图,则该函数返回null。
<强>参数强>
pathName要解码的文件的完整路径名。
<强>返回强>
生成的解码位图,如果无法解码,则为null。
答案 2 :(得分:0)
使用getter Setter Of Bitmap / Drawable创建新类。
现在在MainActivity中设置你的图像Bitmap / Drawable。
在您的Adapter类中,按位置获取该图像。