问题描述
你能帮我吗 我不知道这段代码有什么问题 图片无法保存在手机存储中。这是一个详细信息活动,图片来自 RecyclerView 我用 Glide 库加载它
按钮
button_downloadWall.setonClickListener {
if (Build.VERSION.SDK_INT>= Build.VERSION_CODES.M){
if(ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(this,arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE),100)
}else{
saveImagetoStorage()
}
}else{
saveImagetoStorage()
}
}
请求权限
override fun onRequestPermissionsResult(requestCode: Int,permissions: Array<out String>,grantResults: IntArray) {
if (requestCode == 100){
if (grantResults.isNotEmpty() &&grantResults[0]==PackageManager.PERMISSION_GRANTED){
saveImagetoStorage()
}else{
Toast.makeText(this,"Permission not granted,so image can't be saved in storage",Toast.LENGTH_SHORT).show()
}
}
}
将图像保存到存储功能
private fun saveImagetoStorage(){
val externalStorageState = Environment.getExternalStorageState()
if (externalStorageState.equals(Environment.MEDIA_MOUNTED)){
val storageDirectory = Environment.getExternalStorageDirectory()
val dir : File = File(storageDirectory.absolutePath + "/DCIM")
val file = File(storageDirectory,"${System.currentTimeMillis()}.jpg")
try {
val stream : OutputStream = FileOutputStream(file)
var drawable : BitmapDrawable = details_image.drawable as BitmapDrawable
var bitmap = drawable.bitmap
bitmap.compress(Bitmap.CompressFormat.JPEG,100,stream)
stream.flush()
stream.close()
Toast.makeText(this,"Image saved successfully ${Uri.parse(file.absolutePath )}",Toast.LENGTH_SHORT).show()
}catch (e : Exception){
e.printstacktrace()
}
}else{
Toast.makeText(this,"Unable to access the storage",Toast.LENGTH_SHORT).show()
}
}
解决方法
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