Android 查看pdf文档——PDFView

最近在搞Android显示word文档跟pdf文档的显示，分享一个显示pdf文档的小Demo（ps：word文档的显示网上挺多的）。

 

这里使用的是PDFView，是GitHub上面的一个开源项目点击查看项目这个项目是一个Android Studio的项目，我用的是ecplice但是也不妨碍使用，只需要自己新建一个项目将pdfview中的相关内容进行拷贝，之后设置Demo项目的preference—Android——添加lib即可。（pdflib资源http://download.csdn.net/detail/danfengw/9679024） 

public class MainActivity extends Activity {
private Button mbutton_scanpdf;
private PDFView mPDFview;
private static String urlpath = "http://www.ti.com.cn/cn/lit/ug/tidub07/tidub07.pdf";
private String pdfNameAll="a.pdf";
private String pdfName;
private ProgressDialog dialog;
private String outfilepath;
private File outfile;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mbutton_scanpdf=(Button) findViewById(R.id.button_scanpdf);
mPDFview=(PDFView) findViewById(R.id.pdfview);

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
outfilepath=Environment.getExternalStorageDirectory().getAbsolutePath();
}
pdfNameAll=urlpath.substring(urlpath.lastIndexOf("/"));
pdfName=pdfNameAll.substring(pdfNameAll.indexOf("."));

mbutton_scanpdf.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
dialog=ProgressDialog.show(MainActivity.this, "", "正在加载");

DownloadPDF downloadpdf=new DownloadPDF();
downloadpdf.execute();

}
});

}

@Override
protected void onDestroy() {
Timer timer=new Timer();
timer.schedule(new TimerTask() {

@Override
public void run() {
// TODO Auto-generated method stub
if(outfile.exists()){
outfile.delete();
Log.e("删除文件", ""+outfile.exists());
}

}
}, 6000);
timer.cancel();
super.onDestroy();
}
class DownloadPDF extends AsyncTask<String, String, String>{
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
URL url;
try {
url = new URL(urlpath);
HttpURLConnection conn=(HttpURLConnection) url.openConnection();

conn.setRequestMethod("GET");
conn.setRequestProperty("Charset", "UTF-8");
conn.setDoInput(true);
conn.setConnectTimeout(3000);
conn.connect();
if(HttpURLConnection.HTTP_OK==conn.getResponseCode()){
byte[] bytes=new byte[1024];
InputStream is=conn.getInputStream();
outfile=new File(outfilepath+"/",pdfNameAll);

if(!outfile.exists()){
outfile.createNewFile();
}
FileOutputStream fos=new FileOutputStream(outfile);
int len=-1;
while((len=is.read(bytes))>0){
fos.write(bytes,0,len);
}
fos.flush();
fos.close();
}

} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{

}
return "下载完成";
}
@Override
protected void onPostExecute(String result) {
//  dialog.show();
Log.e("result值", result);
dialog.dismiss();
mPDFview.fromFile(outfile)
.defaultPage(1)
.showMinimap(false)
.enableSwipe(true)
.load();

super.onPostExecute(result);
}
@Override
protected void onProgressUpdate(String... values) {
super.onProgressUpdate(values);

}

}
}

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PS: 

记得添加权限

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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注意PDFView能否展示你的pdf文档还取决于的pdf文档的编辑器，如果pdf文档编辑器的版本太高，pdfview仍然无法打开该pdf文档，因此建议采用mupdf或者调用第三方软件。