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