Android实现文件解压带进度条功能

解压的工具类

package com.example.videodemo.zip;
public class ZipProgressUtil {
  /***
   * 解压通用方法
   *
   * @param zipFileString
   *      文件路径
   * @param outPathString
   *      解压路径
   * @param listener
   *      加压监听
   */
  public static void UnZipFile(final String zipFileString, final String outPathString, final ZipListener listener) {
    Thread zipThread = new UnZipMainThread(zipFileString, outPathString, listener);
    zipThread.start();
  }
  public interface ZipListener {
    /** 开始解压 */
    void zipStart();
    /** 解压成功 */
    void zipSuccess();
    /** 解压进度 */
    void zipProgress(int progress);
    /** 解压失败 */
    void zipFail();
  }
} 

解压线程

package com.example.videodemo.zip;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import com.example.videodemo.zip.ZipProgressUtil.ZipListener;
public class UnZipMainThread extends Thread {
  String zipFileString;
  String outPathString;
  ZipListener listener;
  public UnZipMainThread(String zipFileString, String outPathString, ZipListener listener) {
    this.zipFileString = zipFileString;
    this.outPathString = outPathString;
    this.listener = listener;
  }
  @Override
  public void run() {
    super.run();
    try {
      listener.zipStart();
      long sumLength = 0;
      // 获取解压之后文件的大小,用来计算解压的进度
      long ziplength = getZipTrueSize(zipFileString);
      System.out.println("====文件的大小==" + ziplength);
      FileInputStream inputStream = new FileInputStream(zipFileString);
      ZipInputStream inZip = new ZipInputStream(inputStream);
      ZipEntry zipEntry;
      String szName = "";
      while ((zipEntry = inZip.getNextEntry()) != null) {
        szName = zipEntry.getName();
        if (zipEntry.isDirectory()) {
          szName = szName.substring(0, szName.length() - 1);
          File folder = new File(outPathString + File.separator + szName);
          folder.mkdirs();
        } else {
          File file = new File(outPathString + File.separator + szName);
          file.createNewFile();
          FileOutputStream out = new FileOutputStream(file);
          int len;
          byte[] buffer = new byte[1024];
          while ((len = inZip.read(buffer)) != -1) {
            sumLength += len;
            int progress = (int) ((sumLength * 100) / ziplength);
            updateProgress(progress, listener);
            out.write(buffer, 0, len);
            out.flush();
          }
          out.close();
        }
      }
      listener.zipSuccess();
      inZip.close();
    } catch (Exception e) {
      listener.zipFail();
    }
  }
  int lastProgress = 0;
  private void updateProgress(int progress, ZipListener listener2) {
    /** 因为会频繁的刷新,这里我只是进度>1%的时候才去显示 */
    if (progress > lastProgress) {
      lastProgress = progress;
      listener2.zipProgress(progress);
    }
  }
  /**
   * 获取压缩包解压后的内存大小
   *
   * @param filePath
   *      文件路径
   * @return 返回内存long类型的值
   */
  public long getZipTrueSize(String filePath) {
    long size = 0;
    ZipFile f;
    try {
      f = new ZipFile(filePath);
      Enumeration<? extends ZipEntry> en = f.entries();
      while (en.hasMoreElements()) {
        size += en.nextElement().getSize();
      }
    } catch (IOException e) {
      e.printStackTrace();
    }
    return size;
  }
} 

界面调用方法.我使用的是静态的方法,方便,可以改成非静态的.看个人需求,//注意了,因为解压是放在线程中执行的,所以界面刷新的话,需要使用handler来刷新界面调用还是比较方便的

注意 :调用的方法传入的路径:

1:是压缩文件的全路径   /storage/reeman/1234.zip

2:解压文件的路径(非全路径)   /storage/reeman/zip

package com.example.videodemo;
import com.example.videodemo.zip.ZipProgressUtil;
import com.example.videodemo.zip.ZipProgressUtil.ZipListener;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ProgressBar;
public class MainActivity extends Activity {
  private ProgressBar progressBar1;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    progressBar1 = (ProgressBar) findViewById(R.id.progressBar1);
    ZipProgressUtil.UnZipFile("解压文件的路径", "解压之后的路径", new ZipListener() {
      public void zipSuccess() {
      }
      public void zipStart() {
      }
      public void zipProgress(int progress) {
      }
      public void zipFail() {
      }
    });
  }
} 

总结

以上所述是小编给大家介绍的Android实现文件解压带进度条功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！