Android实现文件解压带进度条功能

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(); 
  } 
} 

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; 
  } 
} 

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() { 
      } 
    }); 
  } 
}