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Expand images on tap (#315)

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* Detect click on images in WebView

* First stub of the fragment to show the image in full screen

* Scale image dimension to fit the display

* Hide toolbar from Image view

* Add back button to the Image view

* Open one image on tap

* Allow zooming on images

* Revert to using Toolbar for navigation.

* Remove vibration when opening the Image view

* Do not open links associated with images

* Send all images in the webpage to the Image fragment.

* Change image on swipe

* Store article images in cache in background.

* Use PhotoView in place of WebView to display images. Implemented a pager to swipe through images.

* Removed debugging logging.
This commit is contained in:
davidoskky 2020-12-22 20:06:38 +01:00 committed by GitHub
parent 7b8a5c9a56
commit 918661be2d
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 270 additions and 6 deletions
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3
app/build.gradle
View File

@ -138,6 +138,9 @@ dependencies {
// Pager
implementation 'me.relex:circleindicator:2.0.0@aar'
//PhotoView
implementation 'com.github.chrisbanes:PhotoView:2.0.0'
implementation 'androidx.core:core-ktx:1.1.0-beta01'
implementation "androidx.lifecycle:lifecycle-livedata:$lifecycle_version"

3
app/src/main/AndroidManifest.xml
View File

@ -62,6 +62,9 @@
<activity
android:name=".ReaderActivity">
</activity>
<activity
android:name=".ImageActivity">
</activity>
<meta-data
android:name="apps.amine.bou.readerforselfoss.utils.glide.SelfSignedGlideModule"

52
app/src/main/java/apps/amine/bou/readerforselfoss/ImageActivity.kt Normal file
View File

@ -0,0 +1,52 @@
package apps.amine.bou.readerforselfoss
import android.os.Bundle
import android.view.MenuItem
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.FragmentManager
import androidx.fragment.app.FragmentStatePagerAdapter
import apps.amine.bou.readerforselfoss.fragments.ImageFragment
import kotlinx.android.synthetic.main.activity_reader.*
class ImageActivity : AppCompatActivity() {
private lateinit var allImages : ArrayList<String>
private var position : Int = 0
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_image)
setSupportActionBar(toolBar)
supportActionBar?.setDisplayShowTitleEnabled(false)
supportActionBar?.setDisplayHomeAsUpEnabled(true)
allImages = intent.getStringArrayListExtra("allImages")
position = intent.getIntExtra("position", 0)
pager.adapter = ScreenSlidePagerAdapter(supportFragmentManager)
pager.currentItem = position
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
android.R.id.home -> {
onBackPressed()
return true
}
}
return super.onOptionsItemSelected(item)
}
private inner class ScreenSlidePagerAdapter(fm: FragmentManager) : FragmentStatePagerAdapter(fm, FragmentStatePagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
override fun getCount(): Int {
return allImages.size
}
override fun getItem(position: Int): ImageFragment {
return ImageFragment.newInstance(allImages[position])
}
}
}

35
app/src/main/java/apps/amine/bou/readerforselfoss/api/selfoss/SelfossModels.kt
View File

@ -5,9 +5,14 @@ import android.net.Uri
import android.os.Parcel
import android.os.Parcelable
import android.text.Html
import android.webkit.URLUtil
import org.jsoup.Jsoup
import apps.amine.bou.readerforselfoss.utils.Config
import apps.amine.bou.readerforselfoss.utils.isEmptyOrNullOrNullString
import com.bumptech.glide.Glide
import com.bumptech.glide.load.engine.DiskCacheStrategy
import com.bumptech.glide.request.RequestOptions
import com.google.gson.annotations.SerializedName
private fun constructUrl(config: Config?, path: String, file: String?): String {
@ -128,6 +133,36 @@ data class Item(
return constructUrl(config, "thumbnails", thumbnail)
}
fun getImages() : ArrayList<String> {
var allImages = ArrayList<String>()
for ( image in Jsoup.parse(content).getElementsByTag("img")) {
allImages.add(image.attr("src"))
}
return allImages
}
fun preloadImages(context: Context) : Boolean {
val imageUrls = this.getImages()
val glideOptions = RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL)
try {
for (url in imageUrls) {
if ( URLUtil.isValidUrl(url)) {
val image = Glide.with(context).asBitmap()
.apply(glideOptions)
.load(url).submit().get()
}
}
} catch (e : Error) {
return false
}
return true
}
fun getTitleDecoded(): String {
return Html.fromHtml(title).toString()
}

1
app/src/main/java/apps/amine/bou/readerforselfoss/background/background.kt
View File

@ -105,6 +105,7 @@ class LoadingWorker(val context: Context, params: WorkerParameters) : Worker(con
notificationManager.notify(2, newItemsNotification.build())
}
}
apiItems.map {it.preloadImages(context)}
}
Timer("", false).schedule(4000) {
notificationManager.cancel(1)

74
app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ArticleFragment.kt
View File

@ -1,28 +1,28 @@
package apps.amine.bou.readerforselfoss.fragments
import android.content.Context
import android.content.Intent
import android.content.SharedPreferences
import android.content.res.ColorStateList
import android.content.res.TypedArray
import android.graphics.Bitmap
import android.graphics.Typeface
import android.graphics.drawable.ColorDrawable
import android.net.Uri
import android.os.Build
import android.os.Bundle
import android.preference.PreferenceManager
import android.view.InflateException
import android.view.*
import android.webkit.*
import androidx.browser.customtabs.CustomTabsIntent
import com.google.android.material.floatingactionbutton.FloatingActionButton
import androidx.fragment.app.Fragment
import androidx.core.content.ContextCompat
import androidx.core.widget.NestedScrollView
import android.view.LayoutInflater
import android.view.MenuItem
import android.view.View
import android.view.ViewGroup
import android.webkit.WebSettings
import androidx.appcompat.app.AlertDialog
import androidx.core.content.res.ResourcesCompat
import androidx.room.Room
import apps.amine.bou.readerforselfoss.ImageActivity
import apps.amine.bou.readerforselfoss.R
import apps.amine.bou.readerforselfoss.api.mercury.MercuryApi
import apps.amine.bou.readerforselfoss.api.mercury.ParsedContent
@ -39,6 +39,7 @@ import apps.amine.bou.readerforselfoss.utils.Config
import apps.amine.bou.readerforselfoss.utils.buildCustomTabsIntent
import apps.amine.bou.readerforselfoss.utils.customtabs.CustomTabActivityHelper
import apps.amine.bou.readerforselfoss.utils.glide.loadMaybeBasicAuth
import apps.amine.bou.readerforselfoss.utils.glide.getBitmapInputStream
import apps.amine.bou.readerforselfoss.utils.isEmptyOrNullOrNullString
import apps.amine.bou.readerforselfoss.utils.network.isNetworkAccessible
import apps.amine.bou.readerforselfoss.utils.openItemUrl
@ -46,6 +47,7 @@ import apps.amine.bou.readerforselfoss.utils.shareLink
import apps.amine.bou.readerforselfoss.utils.sourceAndDateText
import apps.amine.bou.readerforselfoss.utils.succeeded
import com.bumptech.glide.Glide
import com.bumptech.glide.load.engine.DiskCacheStrategy
import com.bumptech.glide.request.RequestOptions
import com.github.rubensousa.floatingtoolbar.FloatingToolbar
import kotlinx.android.synthetic.main.fragment_article.view.*
@ -54,6 +56,8 @@ import retrofit2.Callback
import retrofit2.Response
import java.net.MalformedURLException
import java.net.URL
import java.util.concurrent.ExecutionException
import kotlin.collections.ArrayList
import kotlin.concurrent.thread
class ArticleFragment : Fragment() {
@ -66,6 +70,7 @@ class ArticleFragment : Fragment() {
private lateinit var contentSource: String
private lateinit var contentImage: String
private lateinit var contentTitle: String
private lateinit var allImages : ArrayList<String>
private lateinit var editor: SharedPreferences.Editor
private lateinit var fab: FloatingActionButton
private lateinit var appColors: AppColors
@ -117,6 +122,7 @@ class ArticleFragment : Fragment() {
contentTitle = allItems[pageNumber.toInt()].getTitleDecoded()
contentImage = allItems[pageNumber.toInt()].getThumbnail(activity!!)
contentSource = allItems[pageNumber.toInt()].sourceAndDateText()
allImages = allItems[pageNumber.toInt()].getImages()
prefs = PreferenceManager.getDefaultSharedPreferences(activity)
editor = prefs.edit()
@ -411,6 +417,47 @@ class ArticleFragment : Fragment() {
rootView!!.webcontent.settings.loadWithOverviewMode = true
rootView!!.webcontent.settings.javaScriptEnabled = false
rootView!!.webcontent.webViewClient = object : WebViewClient() {
override fun shouldOverrideUrlLoading(view: WebView?, url : String): Boolean {
if (rootView!!.webcontent.hitTestResult.type != WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE) {
rootView!!.context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(url)))
}
return true
}
override fun shouldInterceptRequest(view: WebView?, url: String): WebResourceResponse? {
val glideOptions = RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL)
if (url.toLowerCase().contains(".jpg") || url.toLowerCase().contains(".jpeg")) {
try {
val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.JPEG))
}catch ( e : ExecutionException) {}
}
else if (url.toLowerCase().contains(".png")) {
try {
val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.PNG))
}catch ( e : ExecutionException) {}
}
else if (url.toLowerCase().contains(".webp")) {
try {
val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.WEBP))
}catch ( e : ExecutionException) {}
}
return super.shouldInterceptRequest(view, url)
}
}
val gestureDetector = GestureDetector(activity, object : GestureDetector.SimpleOnGestureListener() {
override fun onSingleTapUp(e: MotionEvent?): Boolean {
return performClick()
}
})
rootView!!.webcontent.setOnTouchListener { _, event -> gestureDetector.onTouchEvent(event)}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
rootView!!.webcontent.settings.layoutAlgorithm =
WebSettings.LayoutAlgorithm.TEXT_AUTOSIZING
@ -526,5 +573,20 @@ class ArticleFragment : Fragment() {
}
}
fun performClick(): Boolean {
if (rootView!!.webcontent.hitTestResult.type == WebView.HitTestResult.IMAGE_TYPE ||
rootView!!.webcontent.hitTestResult.type == WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE) {
val position : Int = allImages.indexOf(rootView!!.webcontent.hitTestResult.extra)
val intent = Intent(activity, ImageActivity::class.java)
intent.putExtra("allImages", allImages)
intent.putExtra("position", position)
startActivity(intent)
return false
}
return false
}
}

49
app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ImageFragment.kt Normal file
View File

@ -0,0 +1,49 @@
package apps.amine.bou.readerforselfoss.fragments
import android.os.Bundle
import android.view.*
import androidx.fragment.app.Fragment
import apps.amine.bou.readerforselfoss.R
import com.bumptech.glide.Glide
import com.bumptech.glide.load.engine.DiskCacheStrategy
import com.bumptech.glide.request.RequestOptions
import kotlinx.android.synthetic.main.fragment_image.view.*
class ImageFragment : Fragment() {
private lateinit var imageUrl : String
private val glideOptions = RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
imageUrl = arguments!!.getString("imageUrl")
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
val view : View = inflater.inflate(R.layout.fragment_image, container, false)
view.photoView.visibility = View.VISIBLE
Glide.with(activity)
.asBitmap()
.apply(glideOptions)
.load(imageUrl)
.into(view.photoView)
return view
}
companion object {
private const val ARG_IMAGE = "imageUrl"
fun newInstance(
imageUrl : String
): ImageFragment {
val fragment = ImageFragment()
val args = Bundle()
args.putString(ARG_IMAGE, imageUrl)
fragment.arguments = args
return fragment
}
}
}

10
app/src/main/java/apps/amine/bou/readerforselfoss/utils/glide/GlideUtils.kt
View File

@ -14,6 +14,9 @@ import com.bumptech.glide.load.model.GlideUrl
import com.bumptech.glide.load.model.LazyHeaders
import com.bumptech.glide.request.RequestOptions
import com.bumptech.glide.request.target.BitmapImageViewTarget
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.io.InputStream
fun Context.bitmapCenterCrop(config: Config, url: String, iv: ImageView) =
Glide.with(this)
@ -56,4 +59,11 @@ fun RequestManager.loadMaybeBasicAuth(config: Config, url: String): RequestBuild
}
val glideUrl = GlideUrl(url, builder.build())
return this.load(glideUrl)
}
fun getBitmapInputStream(bitmap:Bitmap,compressFormat: Bitmap.CompressFormat): InputStream {
val byteArrayOutputStream = ByteArrayOutputStream()
bitmap.compress(compressFormat, 80, byteArrayOutputStream)
val bitmapData: ByteArray = byteArrayOutputStream.toByteArray()
return ByteArrayInputStream(bitmapData)
}

33
app/src/main/res/layout/activity_image.xml Normal file
View File

@ -0,0 +1,33 @@
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:id="@+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolBar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="?attr/toolbarPopupTheme"
app:theme="@style/ToolBarStyle" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.viewpager.widget.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/appBarLayout" />
</androidx.constraintlayout.widget.ConstraintLayout>

16
app/src/main/res/layout/fragment_image.xml Normal file
View File

@ -0,0 +1,16 @@
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.github.chrisbanes.photoview.PhotoView
android:id="@+id/photoView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:background="@android:color/black"
app:srcCompat="@android:drawable/screen_background_dark" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>