android文件下载及进度条Word文件下载.docx

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android文件下载及进度条Word文件下载.docx

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android文件下载及进度条Word文件下载.docx

privateHandlerhandler=newHandler()

{

@Override

publicvoidhandleMessage(Messagemsg)

{//定义一个Handler,用于处理下载线程与UI间通讯

if(!

Thread.currentThread().isInterrupted())

{

switch(msg.what){

case0:

pb.setMax(fileSize);

case1:

pb.setProgress(downLoadFileSize);

intresult=downLoadFileSize*100/fileSize;

tv.setText(result+"

%"

);

break;

case2:

Toast.makeText(AndroidDownLoadActivity.this,"

文件下载完成"

1)

.show();

case-1:

Stringerror=msg.getData().getString("

error"

Toast.makeText(AndroidDownLoadActivity.this,error,1)

}

}

super.handleMessage(msg);

}

};

/*

*downloadfiletosdcard.

*/

publicvoiddown_file(Stringurl,Stringpath)throwsIOException

//下载函数

filename=url.substring(url.lastIndexOf("

/"

)+1);

//获取文件名

URLmyURL=newURL(url);

URLConnectionconn=myURL.openConnection();

conn.connect();

InputStreamis=conn.getInputStream();

this.fileSize=conn.getContentLength();

//根据响应获取文件大小

Log.i("

value"

"

length="

+this.fileSize);

if(this.fileSize<

=0)

{

thrownewRuntimeException("

无法获知文件大小"

if(is==null)

streamisnull"

Filefile=newFile(Environment.getExternalStorageDirectory(),

filename);

FileOutputStreamfos=newFileOutputStream(file);

//把数据存入路径+文件名

bytebuf[]=newbyte[1024];

downLoadFileSize=0;

sendMsg(0);

do

//循环读取

intnumread=is.read(buf);

if(numread==-1)

break;

fos.write(buf,0,numread);

downLoadFileSize+=numread;

sendMsg

(1);

//更新进度条

}while(true);

sendMsg

(2);

//通知下载完成

try

is.close();

}catch(Exceptionex)

Log.e("

tag"

error:

"

+ex.getMessage(),ex);

}

privatevoidsendMsg(intflag)

Messagemsg=newMessage();

msg.what=flag;

handler.sendMessage(msg);

/**Calledwhentheactivityisfirstcreated.*/

@Override

publicvoidonCreate(BundlesavedInstanceState)

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

pb=(ProgressBar)findViewById(R.id.down_pb);

tv=(TextView)findViewById(R.id.tv);

newThread()

publicvoidrun()

try

{

down_file(

"

http:

//下载路径"

/sdcard/"

//下载文件,参数:

第一个URL,第二个存放路径

}catch(ClientProtocolExceptione)

//TODOAuto-generatedcatchblock

e.printStackTrace();

}catch(IOExceptione)

}.start();

DownloadTextButton=(Button)findViewById(R.id.DownTextButtonId);

DownloadTextButton.setOnClickListener(newDownTextButtonListener());

DownloadMp3Button=(Button)findViewById(R.id.DownMp3ButtonId);

DownloadMp3Button.setOnClickListener(newDownMp3ButtonListener());

privateclassDownTextButtonListenerimplementsOnClickListener

publicvoidonClick(Viewv)

Threadthread=newThread(newRunnable()

publicvoidrun()

//TODOAuto-generatedmethodstub

HttpDownloaderhttpDownloader=newHttpDownloader();

Stringirc=httpDownloader

.download("

);

System.out.println(irc);

});

thread.start();

privateclassDownMp3ButtonListenerimplementsOnClickListener

intresult=httpDownloader

.downFile(

"

,

"

test/"

love.exe"

System.out.println(result);

}

importjava.io.BufferedReader;

importjava.io.InputStreamReader;

import.HttpURLConnection;

import.MalformedURLException;

publicclassHttpDownloader

privateURLurl=null;

publicStringdownload(StringurlStr)

StringBuffersb=newStringBuffer();

Stringline=null;

BufferedReaderbuffer=null;

//创建一个url对象

url=newURL(urlStr);

//创建一个Http连接对象

//HttpURLConnectionurlConn=(HttpURLConnection)url.openConnection();

URLConnectionurlConn=url.openConnection();

urlConn.connect();

intfileSize=urlConn.getContentLength();

Log.d("

filesize"

"

****"

+fileSize);

//使用IO流读取数据

buffer=newBufferedReader(newInputStreamReader(urlConn

.getInputStream()));

while((line=buffer.readLine())!

=null)

sb.append(line);

}catch(Exceptione)

e.printStackTrace();

}finally

try

buffer.close();

}catch(Exceptione)

e.printStackTrace();

returnsb.toString();

publicintdownFile(StringurlStr,Stringpath,StringfileName)

InputStreaminputStream=null;

FileUtilsfileUtils=newFileUtils();

if(fileUtils.isFileExist(path+fileName))

return1;

}else

inputStream=getInputStreamFromUrl(urlStr);

FileresultFile=fileUtils.write2SDFromInput(path,fileName,

inputStream);

if(resultFile==null)

return-1;

return-1;

inputStream.close();

return0;

privateInputStreamgetInputStreamFromUrl(StringurlStr)

throwsMalformedURLException,IOException

//TODOAuto-generatedmethodstub

url=newURL(urlStr);

HttpURLConnectionurlConn=(HttpURLConnection)url.openConnection();

InputStreaminputStream=urlConn.getInputStream();

returninputStream;

importjava.io.OutputStream;

publicclassFileUtils

privateStringSDPATH;

publicStringgetSDPATH()

returnSDPATH;

publicFileUtils()

SDPATH=Environment.getExternalStorageDirectory()+"

;

publicFilecreateSDFile(Stringfilename)throwsIOException

Filefile=newFile(SDPATH+filename);

file.createNewFile();

returnfile;

publicFilecreateSDDir(Stringdirname)throwsIOException

Filefile=newFile(SDPATH+dirname);

file.mkdir();

publicbooleanisFileExist(StringfileName)

Filefile=newFile(SDPATH+fileName);

returnfile.exists();

publicFilewrite2SDFromInput(Stringpath,StringfileName,

InputStreaminput)

Filefile=null;

OutputStreamoutput=null;

createSDDir(path);

file=createSDFile(path+fileName);

output=newFileOutputStream(file);

bytebuffer[]=newbyte[4*1024];

while((input.read(buffer))!

=-1)

output.write(buffer);

output.flush();

output.close();

Main.xml

<

?

xmlversion="

1.0"

encoding="

utf-8"

>

LinearLayoutxmlns:

android="

android:

orientation="

vertical"

layout_width="

fill_parent"

layout_height="

>

TextView

wrap_content"

text="

@string/hello"

/>

TextViewandroid:

id="

@+id/tv"

android:

"

/>

ProgressBarandroid:

@+id/down_pb"

max="

100"

style="

attr/progressBarStyleHorizontal"

Button

@+id/DownTextButtonId"

DownloadText"

@+id/DownMp3ButtonId"

DownloadMp3"

/LinearLayout>

 

Manifest.xml

manifestxmlns:

package="

com.download"

versionCode="

1"

versionName="

<

uses-sdkandroid:

minSdkVersion="

11"

uses-permissionandroid:

name="

android.permission.WRITE_EXTERNAL_STORAGE"

/uses-permission>

android.permission.MOUNT_UNMOUNT_FILESYSTEMS"

/us

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