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 很多时候需要把一个预制的zip文件解压到根目录，下面是一个实例代码：

	private static final int BUFFER_SIZE = 4096;public static void unZip(String zipFilePath, String targetDir) throws IOException {File destDir = new File(targetDir);if (!destDir.exists()) {destDir.mkdirs();}try (FileInputStream fis = new FileInputStream(zipFilePath);ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis))) {ZipEntry entry;while ((entry = zis.getNextEntry()) != null) {String entryName = entry.getName();File file = new File(destDir, entryName);if (entry.isDirectory()) {file.mkdirs();} else {extractFile(zis, file);}zis.closeEntry();}}}private static void extractFile(ZipInputStream zis, File file) throws IOException {File parent = file.getParentFile();if (!parent.exists()) {parent.mkdirs();}try (FileOutputStream fos = new FileOutputStream(file);BufferedOutputStream bos = new BufferedOutputStream(fos, BUFFER_SIZE)) {byte[] buffer = new byte[BUFFER_SIZE];int read;while ((read = zis.read(buffer)) != -1) {bos.write(buffer, 0, read);}}}

使用实例：

unZip("/system/media/xxx.zip", "/storage/emulated/0/");

包自己导入一下就行了