我正在使用Glide库https://github.com/bumptech/glide（Picasso的替代品）并按照本教程http://blog.grafixartist.com/image-gallery-app-android-studio-1-4-glide/使用 基本功能运行良好，例如将图像显示为GridView，幻灯片图像使用ViewPager中的手势。但我想添加更多动作，例如在ViewPage r中共享和保存当前图像，但我不明白如何获得有效的位置。我尝试在下面的代码中添加Share功能，但没有任何反应。我想我必须把功能放在片段上。也许你可以帮助我。感谢。
public class DetailActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
public ArrayList<ImageModel> data = new ArrayList<>();
int pos;
Toolbar toolbar;
/**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
toolbar = (Toolbar) findViewById(R.id.detail_toolbar);
setSupportActionBar(toolbar);
data = getIntent().getParcelableArrayListExtra("data");
pos = getIntent().getIntExtra("pos", 0);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(), data);
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setPageTransformer(true, new DepthPageTransformer());
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setCurrentItem(pos);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_detail, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_share) {
share();
return true;
}
return super.onOptionsItemSelected(item);
}
private void share() { //Nothing happen
SubsamplingScaleImageView Imgv = (SubsamplingScaleImageView) mViewPager.findViewWithTag(mViewPager.getCurrentItem());
//Imgv.setBackgroundResource(data.get(pos).getUrl());
//Imgv.setTag(pos);
Imgv.setDrawingCacheEnabled(true);
Bitmap icon = Imgv.getDrawingCache();
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
icon.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "temporary_file.jpg");
try {
file.createNewFile();
FileOutputStream fo = new FileOutputStream(file);
fo.write(bytes.toByteArray());
} catch (IOException e) {
e.printStackTrace();
}
String nama = getPackageName().toString();
String judul = getTitle().toString();
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
shareIntent.setType("image/jpeg");
Uri uri = Uri.parse("file:///sdcard/temporary_file.jpg");
shareIntent.putExtra(Intent.EXTRA_STREAM,uri);
String sAux = "I recommend " + (judul) + " for you:\n";
sAux = sAux + "https://play.google.com/store/apps/details?id="+(nama);
shareIntent.putExtra(Intent.EXTRA_TEXT, sAux);
startActivity(Intent.createChooser( shareIntent, "Share via"));
startActivity(shareIntent);
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public ArrayList<ImageModel> data = new ArrayList<>();
public SectionsPagerAdapter(FragmentManager fm, ArrayList<ImageModel> data) {
super(fm);
this.data = data;
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position, data.get(position).getName(), data.get(position).getUrl());
}
@Override
public int getCount() {
// Show 3 total pages.
return data.size();
}
@Override
public CharSequence getPageTitle(int position) {
return data.get(position).getName();
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
String name, url;
int pos;
private static final String ARG_SECTION_NUMBER = "section_number";
private static final String ARG_IMG_TITLE = "image_title";
private static final String ARG_IMG_URL = "image_url";
@Override
public void setArguments(Bundle args) {
super.setArguments(args);
this.pos = args.getInt(ARG_SECTION_NUMBER);
this.name = args.getString(ARG_IMG_TITLE);
this.url = args.getString(ARG_IMG_URL);
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber, String name, String url) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
args.putString(ARG_IMG_TITLE, name);
args.putString(ARG_IMG_URL, url);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public void onStart() {
super.onStart();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
final SubsamplingScaleImageView imageView = (SubsamplingScaleImageView) rootView.findViewById(R.id.detail_image);
final ImageView share = (ImageView) rootView.findViewById(R.id.share);
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) { //This is just test code
Toast.makeText(getContext(),
"Image + " + pos , // This pos is works great
Toast.LENGTH_LONG).show();
}
});
Glide
.with(getActivity())
.load(url)
.asBitmap()
.thumbnail(0.1f)
.into(new SimpleTarget<Bitmap>() {
@Override
public void onResourceReady(Bitmap bitmap, GlideAnimation anim) {
imageView .setImage(ImageSource.bitmap(bitmap)
);
}
});
return rootView;
}
}
}