Kotlin Uri 处理工具类

Kotlin Uri 处理工具类

import android.net.Uri
import android.provider.MediaStore
import android.util.Base64
import androidx.loader.content.CursorLoader
import com.purui.mobile.PuruiApplication


object UriUtils {

    private fun uriToPath(uri:Uri?):String {
        if (uri == null) return ""
        //encode the image
        return try {
            //get the image path
            val projection = arrayOf(MediaStore.Images.Media.DATA)
            val cursorLoader = CursorLoader(PuruiApplication.instance, uri, projection, null, null, null)
            val cursor = cursorLoader.loadInBackground()
            val column_index = cursor?.getColumnIndexOrThrow(MediaStore.Images.Media.DATA)?:0
            cursor?.moveToFirst()
            val path = cursor?.getString(column_index)
            path?:""
        } catch (ex: Exception) {
            ""
        }
    }

    private fun uriToBase64(uri:Uri?) :String {
        if (uri == null) return ""
        return try {
            var result = ""
            PuruiApplication.instance.contentResolver?.openInputStream(uri)?.let {
                result = Base64.encodeToString(it.readBytes(),Base64.DEFAULT)
            }
            result
        } catch (ex: java.lang.Exception) {
            ""
        }
    }

    fun uriToFullBase64(uri: Uri?):String {
        val path = uriToPath(uri)
        val prefix = if (path.endsWith("png")) "data:image/png;base64," else "data:image/jpeg;base64,"
        return "$prefix${uriToBase64(uri)}"
    }
}
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