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app/src/main/java/com/sw/dualscreen/utils/AssetsTool.kt

@@ -0,0 +1,76 @@
+package com.sw.dualscreen.utils
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import java.io.BufferedReader
+import java.io.IOException
+import java.io.InputStreamReader
+
+
+object AssetsTool {
+
+//    fun readJson(context: Context, fileName: String): List<String> {
+//        val json = readAssetsFile(context, fileName)
+//        val json2 = json.replace("[[", "[").replaceAfterLast("]]", "]")
+//        val list = json2.split("],")
+//        val resultList = mutableListOf<String>()
+//        var count = 0
+//        val tempList = mutableListOf<String>()
+//        list.forEachIndexed { index, text ->
+//            if (count >= 500) {
+//                val tempJson = "[${tempList.joinToString (",")}]"
+//                resultList.add(tempJson)
+//                tempList.clear()
+//                count = 0
+//            }
+//            val newText = if (index == list.size - 1) text else "${text}]"
+//            tempList.add(newText)
+//            count++
+//        }
+//        if (count < 500) {
+//            val tempJson = "[${tempList.joinToString(",")}]"
+//            resultList.add(tempJson)
+//        }
+//        return resultList
+//    }
+
+    fun readAssetsFile(context: Context, fileName: String): String {
+        val stringBuilder = StringBuilder()
+        try {
+            val bf = BufferedReader(InputStreamReader(context.assets.open(fileName)))
+            bf.useLines { lines -> lines.forEach { stringBuilder.append(it) } }
+        } catch (e: IOException) {
+            e.printStackTrace()
+        }
+        return stringBuilder.toString()
+    }
+
+    fun loadImagesFromAssets(context: Context, subPath: String): MutableList<Bitmap> {
+        val bitmaps: MutableList<Bitmap> = mutableListOf()
+        val assetManager = context.assets
+
+        try {
+            val files = assetManager.list(subPath)
+            files?.forEach { file ->
+                assetManager.open("$subPath/$file").use { `is` ->
+                    val bitmap = BitmapFactory.decodeStream(`is`)
+                    if (bitmap != null) {
+                        bitmaps.add(bitmap)
+                    }
+                }
+            }
+        } catch (e: IOException) {
+            e.printStackTrace()
+        }
+        return bitmaps
+    }
+
+    fun loadImageBitmapFromAssets(context: Context, imagePath:String, action:(bmp: Bitmap)-> Unit) {
+        context.assets.open(imagePath).use { `is` ->
+            val bitmap = BitmapFactory.decodeStream(`is`)
+            action(bitmap)
+        }
+    }
+
+}

app/src/main/java/com/sw/dualscreen/utils/ImageUtil.kt

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+package com.sw.dualscreen.utils
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.net.Uri
+
+object ImageUtil {
+
+    fun uriToBitmap(context: Context, uri: Uri): Bitmap? {
+        return try {
+            context.contentResolver.openInputStream(uri)?.use { stream ->
+                BitmapFactory.decodeStream(stream)
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+            null
+        }
+    }
+
+}