一次性带你解决android 7.0之前所有相册选择图片问题

首先Manifest如下

<provider
android:name=".provider.FileProviderAndroidN"
android:authorities="com.haha.hehe"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_path"/>
</provider>

provider name就是你的package路径+FileName，你可以抽到你的拓展包里

authorites,保证不重复就好了，一般都是直接你的包名.xxx

res下建一个xml foler然后

<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path
name="files_root"
path="Android/data/com.haha.hehe/"/>
<files-path
name="a"
path="files"/>
<cache-path
name="b"
path="caches"/>
<external-cache-path
name="c"
path="excaches"/>
<external-files-path
name="d"
path="exfile"/>
</paths>

顾名思义，context都有相应方法 path为该目录下相对位置 name随便定

具体参考：https://developer.android.com/reference/android/support/v4/content/FileProvider.html

拍照：

val intent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
intent.putExtra(MediaStore.EXTRA_OUTPUT , getUri(file))
startActivityForResult(intent , CAPTURE_IMG)

fun getUri(file : File) : Uri? {
try {
return if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) {
FileProvider.getUriForFile(this , packageName , file)
} else {
Uri.fromFile(file)
}
} catch (e : Exception) {
e.printStackTrace()
}
return null
}

选图片：

val p = Intent(Intent.ACTION_PICK ,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
startActivityForResult(p , CHOOSE_IMG_REQUEST_CODE)

图片处理onActivityResult：

CHOOSE_IMG_REQUEST_CODE -> {
if (null == data) return
val uri = data.data
val path = getAlbumPhotoPath(uri)
if (TextUtils.isEmpty(path)) {
return
}
selectedImagePath = path
}
CAPTURE_IMG -> {
selectedImagePath = file.absolutePath
}

fun getAlbumPhotoPath(uri : Uri) : String {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(this , uri)) {
if (isExternalStorageDocument(uri)) {
val docId = DocumentsContract.getDocumentId(uri)
val split = docId.split(":".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
val type = split[0]
if ("primary".equals(type , ignoreCase = true)) {
return Environment.getExternalStorageDirectory().toString() + "/" + split[1]
}
} else if (isDownloadsDocument(uri)) {
val id = DocumentsContract.getDocumentId(uri)
val contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads") , java.lang.Long.valueOf(id)!!)
return getDataColumn(this , contentUri , null , null)
} else if (isMediaDocument(uri)) {
val docId = DocumentsContract.getDocumentId(uri)
val split = docId.split(":".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()
val type = split[0]
var contentUri : Uri? = null
if ("image" == type) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
} else if ("video" == type) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI
} else if ("audio" == type) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
}
val selection = "_id=?"
val selectionArgs = arrayOf(split[1])
return getDataColumn(this , contentUri , selection , selectionArgs)
}
} else if ("content".equals(uri.scheme , ignoreCase = true)) {
return if (isGooglePhotosUri(uri)) uri.lastPathSegment else getDataColumn(this , uri , null , null)
} else if ("file".equals(uri.scheme , ignoreCase = true)) {
return uri.path
}
return ""
}

ok，大功告成，7.0以下通用，之所以7.0以下是因为不确定之后会不会再次有改动，反正8.0没改，就先用着吧