Android kotlin上传头像实现
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2024-01-03 23:56:34
Android 上传头像基本上是每个app都有的功能,虽然看起来简单,但是作为新手的我实现起来却没有那么简单,实现如下从相册获取照片,代码如下 //从相册获取照片 private fun getFromAlbum() { val intent = Intent() intent.action = Intent.ACTION_GET_CONTENT intent.type = "image/*" startActivityFor...
Android 上传头像基本上是每个app都有的功能,虽然看起来简单,但是作为新手的我实现起来却没有那么简单,实现如下
- 从相册获取照片,代码如下
//从相册获取照片
private fun getFromAlbum() {
val intent = Intent()
intent.action = Intent.ACTION_GET_CONTENT
intent.type = "image/*"
startActivityForResult(intent, FROM_ALBUM_SUCCEED)
}
2.拍照获取照片
//拍照获取照片
@SuppressLint("SimpleDateFormat")
private fun takePhotoTest() {
val intent2 = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
val timeStamp = SimpleDateFormat("yyyyMMdd_HHmmss").format(Date())
val imageFileName = "JPEG_$timeStamp"
val file = File(Environment.getExternalStorageDirectory().path, "${imageFileName}.jpg")
cameraImagePath = file.path
val uri: Uri
uri = if (Build.VERSION.SDK_INT >= 24) {
FileProvider.getUriForFile(context!!, "com.wayeal.wateraffair.user.fileprovider", file)
} else {
Uri.fromFile(file)
}
camearImageUri = uri
intent2.putExtra(MediaStore.EXTRA_OUTPUT, uri)
startActivityForResult(intent2, CODE_TAKE_PHOTO)
}
其中camearImageUri为拍照图片的uri
cameraImagePath为拍照图片的路径
在拍照过程中用到了fileprovider,如果对这一部分不了解的可以了解一下
3.在AndroidManifest.xml中添加下列语句
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.wayeal.wateraffair.user.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
以上拍照和在相册获取照片就解决了,但是我们是拍照了,但是获取的图片在哪呢,不要急重写下列函数,获取结果
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
when (requestCode) {
FROM_ALBUM_SUCCEED -> {//从相册获取成功
try {
imageUri = data?.data
realPathFromUri = RealPathFromUriUtils.getRealPathFromUri(context, imageUri)
upImage(FROM_ALBUM)//这里实现文件上传服务器,如不需要可以直接设置显示
} catch (e: Exception) {
e.printStackTrace()
}
}
CODE_TAKE_PHOTO -> {//拍照获取成功
upImage(FROM_PHOTO)//这里实现文件上传服务器,如不需要可以直接设置显示
if (resultCode == RESULT_CANCELED) {
context?.let { delteImageUri(it, imageUri) }
return
}
}
else -> {
}
}
}
在上传服务器是会出现文件找不到问题
在AndroidManifest.xml的application中添加下列语句
android:usesCleartextTraffic="true"
这样一个简单的上传头像就做完了
如果在上传服务器时由于图片太大而上传太慢,还可以进行图片压缩代码如下
/**
* 压缩图片到目标大小以下
* @param file
* @param targetSize
*/
open fun compressBmpFileToTargetSize(file: File, targetSize: Long) {
Log.d(
TAG,
String.format(
"compressBmpFileToTargetSize start file.length():%d",
file.length()
)
)
if (file.length() > targetSize) {
// 每次宽高各缩小一半
val ratio = 2
// 获取图片原始宽高
val options =
BitmapFactory.Options()
val bitmap =
BitmapFactory.decodeFile(file.absolutePath, options)
var targetWidth = options.outWidth / ratio
var targetHeight = options.outHeight / ratio
// 压缩图片到对应尺寸
val baos = ByteArrayOutputStream()
val quality = 100
var result =
generateScaledBmp(bitmap, targetWidth, targetHeight, baos, quality)
// 计数保护,防止次数太多太耗时。
var count = 0
while (baos.size() > targetSize && count <= 10) {
targetWidth /= ratio
targetHeight /= ratio
count++
// 重置,不然会累加
baos.reset()
result = generateScaledBmp(result, targetWidth, targetHeight, baos, quality)
}
try {
val fos = FileOutputStream(file)
fos.write(baos.toByteArray())
fos.flush()
fos.close()
} catch (e: java.lang.Exception) {
e.printStackTrace()
}
}
Log.d(
TAG,
String.format("compressBmpFileToTargetSize end file.length():%d", file.length())
)
}
/**
* 图片缩小一半
*
* @param srcBmp
* @param targetWidth
* @param targetHeight
* @param baos
* @param quality
* @return
*/
private fun generateScaledBmp(
srcBmp: Bitmap,
targetWidth: Int,
targetHeight: Int,
baos: ByteArrayOutputStream,
quality: Int
): Bitmap {
val result = Bitmap.createBitmap(
targetWidth,
targetHeight,
Bitmap.Config.ARGB_8888
)
val canvas = Canvas(result)
val rect = Rect(0, 0, result.width, result.height)
canvas.drawBitmap(srcBmp, null, rect, null)
if (!srcBmp.isRecycled) {
srcBmp.recycle()
}
result.compress(Bitmap.CompressFormat.JPEG, quality, baos)
return result
}
这样就完成了简单的头像上传,小白记录学习日常,如有不对请指正
本文地址:https://blog.csdn.net/qq_44977215/article/details/107856719