compose中实现拍照和选取相册功能兼容android 13+

效果图

添加引用

//用于compose权限的使用
implementation("com.google.accompanist:accompanist-permissions:0.31.0-alpha")
//闪光
implementation("com.google.accompanist:accompanist-placeholder-material:0.31.0-alpha")
implementation("io.coil-kt:coil-compose:2.2.2")

修改AndroidManifest.xml

  添加权限清单和provider

<uses-permission android:name="android.permission.CAMERA" />

    <uses-permission
        android:name="android.permission.READ_EXTERNAL_STORAGE"
        android:maxSdkVersion="31" />

    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />

    <uses-feature
        android:name="android.hardware.camera"
        android:required="false" />

 <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.image.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_provider_paths" />
        </provider>

  添加路径文件file_provider_paths.xml:

<?xml version="1.0" encoding="utf-8"?>

<paths>
    <external-path
        name="img_files"
        path="." />
    <cache-path
        name="cache"
        path="." />

</paths>

定义拍照和选取相册的ResultContract

  拍照和选取图片的intent在Android上是通用的，后面写的compose组合方法才是compose里面特有的，所以这里也可以拿来放到非compose里面使用。
  添加选取图片intent：

class SelectPicture : ActivityResultContract<Unit?, PictureResult>() {
   
   

    private var context: Context? = null

    override fun createIntent(context: Context, input: Unit?): Intent {
   
   
        this.context = context
        return Intent(Intent.ACTION_PICK).setType("image/*")
    }

    override fun parseResult(resultCode: Int, intent: Intent?): PictureResult {
        return PictureResult(intent?.data, resultCode == Activity.RESULT_OK)
    }
}
//图片结果
class PictureResult(val uri: Uri?, val isSuccess: Boolean)

  添加拍照intent：

class TakePhoto : ActivityResultContract<Unit?, PictureResult>() {
   
   

    var outUri: Uri? =