效果.gif
首先在AndroidManifest中添加需要的权限，以相机和文件读写权限为例
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
通常在APP打开的第一个Activity中动态获取权限
//将所要请求的权限放在一个list集合中一起请求
private var permissions = arrayOf(
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.CAMERA)
//存放未授权的权限
private var UnauthorizedList: ArrayList<String> = ArrayList()
private val mRequestCode = 100
private fun Permission() {
if (Build.VERSION.SDK_INT >= 23){
for (i in permissions.indices){
if (ContextCompat.checkSelfPermission(this,permissions[i]) != PackageManager.PERMISSION_GRANTED){
//没有授权的权限
UnauthorizedList.add(permissions[i])
}
}
//权限请求
ActivityCompat.requestPermissions(this, UnauthorizedList, mRequestCode)
}
}
Android10以上文件读写权限需要在AndroidManifest的application中添加
android:requestLegacyExternalStorage="true"
