作者:坏尐骇MB_549 | 来源:互联网 | 2023-05-23 18:06
我在互联网上搜索了这个问题,我找不到任何好的东西.我确实在Android开发者网站上查看,但他们将URL中的图像加载到ImageView中.
这是我的代码:
Openfactsscreen活动:
public class Openfactsscreen extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_openfactsscreen);
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImageAdapter adapter = new ImageAdapter(this);
viewPager.setAdapter(adapter);
}
public void openmenu(View view){
Intent intent = new Intent(this, SendFact.class);
startActivity(intent); }
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.openfactsscreen, menu);
return true;
}
}
ImageAdapter.java:
public class ImageAdapter extends PagerAdapter {
Context context;
private int[] GalImages = new int[] {
R.drawable.factcard2,
R.drawable.factcard8,
R.drawable.factcard4
};
ImageAdapter(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.padding_medium);
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);
}
}
activity_openfactsscreen:
一切正常,如果有人知道一个好的网站,或者如果有人想帮助我,这将是伟大的!
无论如何,谢谢你的时间,美好的一天!
1> Muthu..:
在你的课程结束时加上这个
public class ImageAdapter extends PagerAdapter {
Context context;
private int[] GalImages = new int[] {
R.drawable.factcard2,
R.drawable.factcard8,
R.drawable.factcard4
};
ImageAdapter(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.padding_medium);
imageView.setPadding(padding, padding, padding, padding);
imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
//imageView.setImageResource(GalImages[position]);
new LoadImage(imageView).execute("Your URL");
((ViewPager) container).addView(imageView, 0);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
private class LoadImage extends AsyncTask {
ImageView img=null;
public LoadImage(ImageView img){
this.img=img;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
protected Bitmap doInBackground(String... args) {
Bitmap bitmap=null;
try {
bitmap = BitmapFactory.decodeStream((InputStream)new URL(args[0]).getContent());
} catch (Exception e) {
e.printStackTrace();
}
return bitmap;
}
protected void onPostExecute(Bitmap image) {
if(image != null){
img.setImageBitmap(image);
}
}
}`
}