Android Glide preload LruCache DefaultLifecycleObserver pause/resumeRequests，Kotlin
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
val cache = android.util.LruCache<String, WeakReference<Bitmap>>(2000)
val items = readAllImage(this)
items.forEachIndexed { index, myData ->
doPreload(myData, 50, cache)
}
lifecycle.addObserver(object : DefaultLifecycleObserver {
override fun onResume(owner: LifecycleOwner) {
super.onResume(owner)
Log.d(TAG, "onResume")
GlideApp.with(this@MainActivity).resumeRequests()
}
override fun onStop(owner: LifecycleOwner) {
super.onStop(owner)
Log.d(TAG, "onStop")
GlideApp.with(this@MainActivity).pauseAllRequests()
}
})
private fun doPreload(
myData: MyData,
size: Int,
cache: android.util.LruCache<String, WeakReference<Bitmap>>?
) {
GlideApp.with(this)
.asBitmap()
.load(myData.path).addListener(object : RequestListener<Bitmap> {
override fun onLoadFailed(
e: GlideException?,
model: Any?,
target: Target<Bitmap>?,
isFirstResource: Boolean
): Boolean {
return false
}
override fun onResourceReady(
resource: Bitmap?,
model: Any?,
target: Target<Bitmap>?,
dataSource: DataSource?,
isFirstResource: Boolean
): Boolean {
if (resource != null) {
cache?.put(myData.path, WeakReference(resource))
}
Log.d(
"Glide-LruCache",
"path=${myData.path} byteCount=${
cache?.get(myData.path)?.get()?.byteCount
}$ ${cache?.size()}"
)
return false
}
})
.centerCrop()
.override(size)
.diskCacheStrategy(DiskCacheStrategy.AUTOMATIC)
.preload(size, size)
}
private fun readAllImage(context: Context): ArrayList<MyData> {
val photos = ArrayList<MyData>()
//读取手机图片
val cursor = context.contentResolver.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
null,
null,
null,
null
)
var index = 0
while (cursor!!.moveToNext()) {
//图片路径 uri
val path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA))
//图片名称
//val name = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME))
//图片大小
//val size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.SIZE))
photos.add(MyData(path, index++))
}
cursor.close()
return photos
}
class MyData(var path: String, val index: Int) {
}
Android Glide preload CustomTarget bitmap into LruBitmapPool, kotlin_zhangphil's blog-CSDN blog [code] Android Paging 3, kotlin (1) In actual development, although Glide solves the problem of fast loading pictures, there is still a problem that remains unresolved: for example, users Usually, the user's avatar is an ordinary rectangular picture read from the server, but the current design generally requires the user's avatar to be displayed as a circular avatar on the APP side, so although Glide can load it at this time, what is loaded is a Rectangle, if you want Glide_android frosted glass with rounded corners. "Android Image Loading and Caching Open Source Framework: Android Glide" Android Glide is an open source third-party framework for image loading and caching processing. https://blog.csdn.net/zhangphil/article/details/131667687 kotlin forEachIndexed arrayListOf<String>_zhangphil's blog-CSDN blogPython for loop zip_python zip function for for loop_zhangphil's blog-CSDN blog.
https://blog.csdn.net/zhangphil/article/details/131003571