Java tutorial
/* Copyright 2017 Andrew Dawson * * This file is a part of Tusky. * * This program is free software; you can redistribute it and/or modify it under the terms of the * GNU General Public License as published by the Free Software Foundation; either version 3 of the * License, or (at your option) any later version. * * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General * Public License for more details. * * You should have received a copy of the GNU General Public License along with Tusky; if not, * see <http://www.gnu.org/licenses>. */ package net.maa123.tatuky.fragment; import android.app.DownloadManager; import android.content.Context; import android.content.pm.PackageManager; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.annotation.StringRes; import android.support.design.widget.Snackbar; import android.support.v4.app.DialogFragment; import android.support.v4.content.ContextCompat; import android.support.v7.widget.Toolbar; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.ImageView; import com.github.chrisbanes.photoview.OnOutsidePhotoTapListener; import com.github.chrisbanes.photoview.OnSingleFlingListener; import com.github.chrisbanes.photoview.PhotoView; import com.github.chrisbanes.photoview.PhotoViewAttacher; import net.maa123.tatuky.R; import com.squareup.picasso.Callback; import com.squareup.picasso.Picasso; import java.io.File; import butterknife.BindView; import butterknife.ButterKnife; public class ViewMediaFragment extends DialogFragment implements Toolbar.OnMenuItemClickListener { private PhotoViewAttacher attacher; private static final int PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE = 1; @BindView(R.id.view_media_image) PhotoView photoView; @BindView(R.id.toolbar) Toolbar toolbar; public static ViewMediaFragment newInstance(String url) { Bundle arguments = new Bundle(); ViewMediaFragment fragment = new ViewMediaFragment(); arguments.putString("url", url); fragment.setArguments(arguments); return fragment; } @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setStyle(DialogFragment.STYLE_NORMAL, R.style.Dialog_FullScreen); } @Override public void onResume() { ViewGroup.LayoutParams params = getDialog().getWindow().getAttributes(); params.width = WindowManager.LayoutParams.MATCH_PARENT; params.height = WindowManager.LayoutParams.MATCH_PARENT; getDialog().getWindow().setAttributes((android.view.WindowManager.LayoutParams) params); super.onResume(); } @Override public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) { final View rootView = inflater.inflate(R.layout.fragment_view_media, container, false); ButterKnife.bind(this, rootView); Bundle arguments = getArguments(); String url = arguments.getString("url"); attacher = new PhotoViewAttacher(photoView); // Clicking outside the photo closes the viewer. attacher.setOnOutsidePhotoTapListener(new OnOutsidePhotoTapListener() { @Override public void onOutsidePhotoTap(ImageView imageView) { dismiss(); } }); /* A vertical swipe motion also closes the viewer. This is especially useful when the photo * mostly fills the screen so clicking outside is difficult. */ attacher.setOnSingleFlingListener(new OnSingleFlingListener() { @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { if (Math.abs(velocityY) > Math.abs(velocityX)) { dismiss(); return true; } return false; } }); toolbar.setNavigationOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dismiss(); } }); Picasso.with(getContext()).load(url).into(photoView, new Callback() { @Override public void onSuccess() { rootView.findViewById(R.id.view_media_progress).setVisibility(View.GONE); toolbar.setOnMenuItemClickListener(ViewMediaFragment.this); toolbar.inflateMenu(R.menu.view_media_tooblar); attacher.update(); } @Override public void onError() { } }); return rootView; } private void downloadImage() { //Permission stuff if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN && ContextCompat.checkSelfPermission(this.getContext(), android.Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { android.support.v4.app.ActivityCompat.requestPermissions(getActivity(), new String[] { android.Manifest.permission.WRITE_EXTERNAL_STORAGE }, PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE); } else { //download stuff String url = getArguments().getString("url"); Uri uri = Uri.parse(url); String filename = new File(url).getName(); DownloadManager downloadManager = (DownloadManager) getContext() .getSystemService(Context.DOWNLOAD_SERVICE); DownloadManager.Request request = new DownloadManager.Request(uri); request.allowScanningByMediaScanner(); request.setDestinationInExternalPublicDir(Environment.DIRECTORY_PICTURES, getString(R.string.app_name) + "/" + filename); downloadManager.enqueue(request); } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) { switch (requestCode) { case PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE: { if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { downloadImage(); } else { doErrorDialog(R.string.error_media_download_permission, R.string.action_retry, new View.OnClickListener() { @Override public void onClick(View v) { downloadImage(); } }); } break; } } } private void doErrorDialog(@StringRes int descriptionId, @StringRes int actionId, View.OnClickListener listener) { if (getView() != null) { Snackbar bar = Snackbar.make(getView(), getString(descriptionId), Snackbar.LENGTH_SHORT); bar.setAction(actionId, listener); bar.show(); } } @Override public boolean onMenuItemClick(MenuItem item) { int id = item.getItemId(); switch (id) { case R.id.action_download: downloadImage(); break; default: break; } return true; } }