安卓 解压缩文件

本文主要是介绍安卓 解压缩文件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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);
        }}
}

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