134 lines
3.6 KiB
Kotlin
134 lines
3.6 KiB
Kotlin
package com.img.rabbit.utils
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import android.content.Context
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import android.content.Intent
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import android.net.Uri
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import android.provider.MediaStore
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import androidx.activity.compose.rememberLauncherForActivityResult
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import androidx.activity.result.contract.ActivityResultContracts
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import androidx.compose.runtime.Composable
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import androidx.compose.ui.platform.LocalContext
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import java.io.File
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import java.text.SimpleDateFormat
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import java.util.Date
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import java.util.Locale
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/**
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* 图片选择工具类
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*/
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object ImagePickerUtils {
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/**
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* 创建相机拍照的Intent
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*/
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fun createCameraIntent(context: Context): Pair<Intent, File> {
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val timeStamp = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
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val storageDir = context.externalCacheDir ?: context.cacheDir
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val imageFile = File.createTempFile(
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"JPEG_${timeStamp}_",
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".jpg",
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storageDir
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)
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val intent = Intent(MediaStore.ACTION_IMAGE_CAPTURE).apply {
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putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(imageFile))
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addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
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}
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return Pair(intent, imageFile)
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}
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/**
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* 创建相册选择的Intent
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*/
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fun createGalleryIntent(): Intent {
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return Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI).apply {
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type = "image/*"
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}
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}
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/**
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* 获取图片的Uri路径
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*/
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fun getImageUri(context: Context, file: File): Uri {
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return androidx.core.content.FileProvider.getUriForFile(
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context,
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"${context.packageName}.fileprovider",
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file
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)
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}
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}
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/**
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* 图片选择结果数据类
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*/
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data class ImagePickerResult(
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val uri: Uri? = null,
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val filePath: String? = null,
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val error: String? = null
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)
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/**
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* 可组合函数：创建相机启动器
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*/
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@Composable
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fun rememberCameraLauncher(
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context: Context = LocalContext.current,
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onResult: (ImagePickerResult) -> Unit
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) = rememberLauncherForActivityResult(
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ActivityResultContracts.TakePicture()
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) { success ->
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if (success) {
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// 这里需要与createCameraIntent配合使用，实际使用时需要保存临时文件路径
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onResult(ImagePickerResult(error = "需要配合createCameraIntent使用"))
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} else {
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onResult(ImagePickerResult(error = "拍照取消或失败"))
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}
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}
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/**
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* 可组合函数：创建相册启动器（单个图片选择）
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*/
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@Composable
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fun rememberGalleryLauncher(
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onResult: (ImagePickerResult) -> Unit
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) = rememberLauncherForActivityResult(
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ActivityResultContracts.PickVisualMedia()
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) { uri ->
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if (uri != null) {
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onResult(ImagePickerResult(uri = uri))
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} else {
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onResult(ImagePickerResult(error = "未选择图片"))
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}
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}
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/**
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* 可组合函数：创建相册启动器（多个图片选择）
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*/
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@Composable
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fun rememberMultipleGalleryLauncher(
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onResult: (List<ImagePickerResult>) -> Unit
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) = rememberLauncherForActivityResult(
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ActivityResultContracts.PickMultipleVisualMedia()
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) { uris ->
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val results = uris.map { uri ->
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ImagePickerResult(uri = uri)
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}
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onResult(results)
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}
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/**
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* 可组合函数：创建通用图片选择启动器（支持相机和相册）
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*/
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@Composable
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fun rememberImagePickerLauncher(
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onResult: (ImagePickerResult) -> Unit
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) = rememberLauncherForActivityResult(
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ActivityResultContracts.GetContent()
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) { uri ->
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if (uri != null) {
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onResult(ImagePickerResult(uri = uri))
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} else {
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onResult(ImagePickerResult(error = "未选择图片"))
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}
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} |