安卓 解压缩文件

解压缩文件

public void showUnzipDialog() {    new AlertDialog.Builder(this).setTitle("确认")            .setMessage("是否解压？")            .setPositiveButton("是", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    // TODO Auto-generated method stub                    doZipExtractorWork();                }            })            .setNegativeButton("否", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    // TODO Auto-generated method stub                }            })            .show();}public void doZipExtractorWork() {    ZipExtractorTask task = new ZipExtractorTask("/mnt/sdcard/test.zip", "/mnt/sdcard/test", this, true);    task.execute();}




import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Enumeration;import java.util.zip.ZipEntry;import java.util.zip.ZipException;import java.util.zip.ZipFile;import android.app.ProgressDialog;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnCancelListener;import android.os.AsyncTask;import android.util.Log;public class ZipExtractorTask extends AsyncTask<Void, Integer, Long> {    private final String TAG = "ZipExtractorTask";    private final File mInput;    private final File mOutput;    private final ProgressDialog mDialog;    private int mProgress = 0;    private final Context mContext;    private boolean mReplaceAll;    public ZipExtractorTask(String in, String out, Context context, boolean replaceAll) {        super();        mInput = new File(in);        mOutput = new File(out);        if (!mOutput.exists()) {            if (!mOutput.mkdirs()) {                Log.e(TAG, "Failed to make directories:" + mOutput.getAbsolutePath());            }        }        if (context != null) {            mDialog = new ProgressDialog(context);        } else {            mDialog = null;        }        mContext = context;        mReplaceAll = replaceAll;    }    @Override    protected Long doInBackground(Void... params) {        // TODO Auto-generated method stub        return unzip();    }    @Override    protected void onPostExecute(Long result) {        // TODO Auto-generated method stub        //super.onPostExecute(result);        if (mDialog != null && mDialog.isShowing()) {            mDialog.dismiss();        }        if (isCancelled())            return;    }    @Override    protected void onPreExecute() {        // TODO Auto-generated method stub        //super.onPreExecute();        if (mDialog != null) {            mDialog.setTitle("Extracting");            mDialog.setMessage(mInput.getName());            mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);            mDialog.setOnCancelListener(new OnCancelListener() {                @Override                public void onCancel(DialogInterface dialog) {                    // TODO Auto-generated method stub                    cancel(true);                }            });            mDialog.show();        }    }    @Override    protected void onProgressUpdate(Integer... values) {        // TODO Auto-generated method stub        //super.onProgressUpdate(values);        if (mDialog == null)            return;        if (values.length > 1) {            int max = values[1];            mDialog.setMax(max);        } else            mDialog.setProgress(values[0].intValue());    }    private long unzip() {        long extractedSize = 0L;        Enumeration<ZipEntry> entries;        ZipFile zip = null;        try {            zip = new ZipFile(mInput);//zip 文件路径            long uncompressedSize = getOriginalSize(zip);            publishProgress(0, (int) uncompressedSize);//刷新进度条            entries = (Enumeration<ZipEntry>) zip.entries();            while (entries.hasMoreElements()) {                ZipEntry entry = entries.nextElement();                if (entry.isDirectory()) {                    continue;                }                File destination = new File(mOutput, entry.getName());                if (!destination.getParentFile().exists()) {                    Log.e(TAG, "make=" + destination.getParentFile().getAbsolutePath());                    destination.getParentFile().mkdirs();                }                if (destination.exists() && mContext != null && !mReplaceAll) {                }                ProgressReportingOutputStream outStream = new ProgressReportingOutputStream(destination);                extractedSize += copy(zip.getInputStream(entry), outStream);                outStream.close();            }        } catch (ZipException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            try {                zip.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        return extractedSize;    }    /**     * 获取   大小     *     * @param file     * @return     */    private long getOriginalSize(ZipFile file) {        Enumeration<ZipEntry> entries = (Enumeration<ZipEntry>) file.entries();        long originalSize = 0l;        while (entries.hasMoreElements()) {            ZipEntry entry = entries.nextElement();            if (entry.getSize() >= 0) {                originalSize += entry.getSize();            }        }        return originalSize;    }    private int copy(InputStream input, OutputStream output) {        byte[] buffer = new byte[1024 * 8];        BufferedInputStream in = new BufferedInputStream(input, 1024 * 8);        BufferedOutputStream out = new BufferedOutputStream(output, 1024 * 8);        int count = 0, n = 0;        try {            while ((n = in.read(buffer, 0, 1024 * 8)) != -1) {                out.write(buffer, 0, n);                count += n;            }            out.flush();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            try {                out.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }            try {                in.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        return count;    }    private final class ProgressReportingOutputStream extends FileOutputStream {        public ProgressReportingOutputStream(File file)                throws FileNotFoundException {            super(file);            // TODO Auto-generated constructor stub        }        @Override        public void write(byte[] buffer, int byteOffset, int byteCount)                throws IOException {            // TODO Auto-generated method stub            super.write(buffer, byteOffset, byteCount);            mProgress += byteCount;            publishProgress(mProgress);        }    }}