質問編集履歴
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test
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Androidの外部ストレージにフォルダを作るにはどうすればいいですか？
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```java
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File dir = new File("/storage/sdcard/Android/data/com.google.android.exoplayer2.demo/movie");
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if(!dir.exists()){
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boolean result = dir.mkdirs();
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if(result){
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System.out.println("Success");
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}
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}
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```
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http://buchi.hatenablog.com/entry/2014/11/06/235007
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