While selecting multiple pictures uploaded to the server

Android-UploadMultipartImage-master
...................................\README.md
...................................\client
...................................\......\.gitignore
...................................\......\.idea
...................................\......\.....\.name
...................................\......\.....\compiler.xml
...................................\......\.....\copyright
...................................\......\.....\.........\profiles_settings.xml
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...................................\......\.....\gradle.xml
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...................................\......\.....\modules.xml
...................................\......\.....\runConfigurations.xml
...................................\......\.....\vcs.xml
...................................\......\PhotoPicker-master.iml
...................................\......\README.md
...................................\......\ReleaseNotes.md
...................................\......\app
...................................\......\...\.gitignore
...................................\......\...\app.iml
...................................\......\...\build.gradle
...................................\......\...\proguard-rules.pro
...................................\......\...\src
...................................\......\...\...\androidTest
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...................................\......\...\...\...........\....\com
...................................\......\...\...\...........\....\...\lidong
...................................\......\...\...\...........\....\...\......\photopicker
...................................\......\...\...\...........\....\...\......\...........\ApplicationTest.java
...................................\......\...\...\main
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...................................\......\...\...\....\java
...................................\......\...\...\....\....\com
...................................\......\...\...\....\....\...\lidong
...................................\......\...\...\....\....\...\......\photopickersample
...................................\......\...\...\....\....\...\......\.................\FileUploadManager.java
...................................\......\...\...\....\....\...\......\.................\MainActivity.java
...................................\......\...\...\....\res
...................................\......\...\...\....\...\layout
...................................\......\...\...\....\...\......\activity_main.xml
...................................\......\...\...\....\...\......\item_image.xml
...................................\......\...\...\....\...\menu
...................................\......\...\...\....\...\....\menu_main.xml
...................................\......\...\...\....\...\mipmap-hdpi
...................................\......\...\...\....\...\...........\ic_launcher.png
...................................\......\...\...\....\...\mipmap-mdpi
...................................\......\...\...\....\...\...........\ic_launcher.png
...................................\......\...\...\....\...\mipmap-xhdpi
...................................\......\...\...\....\...\............\ic_launcher.png
...................................\......\...\...\....\...\mipmap-xxhdpi
...................................\......\...\...\....\...\.............\ic_launcher.png
...................................\......\...\...\....\...\values
...................................\......\...\...\....\...\......\colors.xml
...................................\......\...\...\....\...\......\strings.xml
...................................\......\...\...\....\...\......\styles.xml
...................................\......\build.gradle
...................................\......\client.iml
...................................\......\gradle.properties
...................................\...

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