Java tutorial
//package com.java2s; import android.content.Context; import android.os.Environment; import java.io.File; import java.util.ArrayList; import java.util.List; public class Main { public static List<String> voice_wechat_paths; public static List<String> voice_qq_paths; private static String export_dir; public static void init(Context context) { voice_wechat_paths = new ArrayList<>(); voice_qq_paths = new ArrayList<>(); if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { File dir = Environment.getExternalStorageDirectory(); File f = new File(dir + "/tencent/MicroMsg"); if (f.exists() && f.canRead() && f.isDirectory()) { File[] files = f.listFiles(); if (files == null || files.length == 0) { return; } for (File f0 : files) { if (f0.isDirectory() && f0.getName().length() > 24) { voice_wechat_paths.add(f0.getAbsolutePath() + "/voice2"); } } } File exportDir = new File(dir, "silkv3_mp3"); if (!exportDir.exists()) { exportDir.mkdirs(); } export_dir = exportDir.getAbsolutePath(); } } }