Android内部嵌入MuPdf预览Pdf文件

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需要资源：MUPdf依赖库。
demo下载地址：http://download.csdn.net/detail/u011084603/9369480
实现思路：首先工程依赖MuPDF库，获取到网络pdf文件url后进行下载到本地，使用mupdf整合好的jni方法直接加载即可。

【MuPdf:】
Android 设备上轻量级、高品质的 PDF/XPS/CBZ 查看器。MuPDF 上的呈现器专为高质量的抗失真图像量身打造，它以像素级的精度高品质呈现文字和文字间的间距，从而获得最高级别的显示保真度，在设备屏幕上再现印刷纸张的显示效果。

这里写图片描述

主工程依赖上面的库工程。
这里写图片描述

主工程中需要加载pdf地方：

package com.artifex.mupdf;import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;public class MainActivity extends Activity {private Button btn_select, test_stephenPicScalView;private Handler handler;private ProgressDialog dialog;// urlpath是网络的PDF地址，也可以是服务器端的PDF地址private String urlpath = "http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/pdf_open_parameters.pdf";protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏setContentView(R.layout.layout_main);dialog = new ProgressDialog(this);btn_select = (Button) findViewById(R.id.btn_select);test_stephenPicScalView = (Button) findViewById(R.id.test_stephenPicScalView);test_stephenPicScalView.setOnClickListener(new OnClickListener() {public void onClick(View v) {startActivity(new Intent(MainActivity.this,TestMuPDFActivity.class));}});btn_select.setOnClickListener(new OnClickListener() {public void onClick(View v) {dialog.setTitle("正在联网下载数据...");dialog.setMessage("请稍后...");// 设置进度条风格，风格为长形dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);// 设置ProgressDialog 标题dialog.setTitle("提示");// 设置ProgressDialog 提示信息dialog.setMessage("正在下载数据，请稍等....");// 设置ProgressDialog 进度条进度dialog.setProgress(0);// 设置ProgressDialog 的进度条是否不明确dialog.setIndeterminate(false);// 设置ProgressDialog 是否可以按退回按键取消dialog.setCancelable(true);dialog.show();handler = new Handler() {public void handleMessage(android.os.Message msg) {dialog.cancel();dialog.setProgress(0);}};// Thread thread = new Thread(new loadDateThreah());loadDataThreah ldt = new loadDataThreah();ldt.start();}});}// 进度条线程class loadDataThreah extends Thread {public void run() {try {showPDF(urlpath);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}handler.sendEmptyMessage(0);}}// 从服务器下载PDF并且跳转到MUPDF的ACTIVITYpublic void showPDF(String urlpath) throws Exception {URL u = new URL(urlpath);String path = createDir("test.pdf");byte[] buffer = new byte[1024 * 8];int read;int ava = 0;long start = System.currentTimeMillis();BufferedInputStream bin;try {HttpURLConnection urlcon = (HttpURLConnection) u.openConnection();double fileLength = (double) urlcon.getContentLength();bin = new BufferedInputStream(u.openStream());BufferedOutputStream bout = new BufferedOutputStream(new FileOutputStream(path));while ((read = bin.read(buffer)) > -1) {bout.write(buffer, 0, read);ava += read;int a = (int) Math.floor((ava / fileLength * 100));dialog.setProgress(a);long speed = ava / (System.currentTimeMillis() - start);System.out.println("Download: " + ava + " byte(s)"+ "    avg speed: " + speed + "  (kb/s)");}bout.flush();bout.close();Uri uri = Uri.parse(path);Intent intent = new Intent(MainActivity.this, MuPDFActivity.class);intent.setAction(Intent.ACTION_VIEW);intent.setData(uri);startActivity(intent);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private String createDir(String filename) {File sdcardDir = Environment.getExternalStorageDirectory();// 得到一个路径，内容是sdcard的文件夹路径和名字String path = sdcardDir.getPath() + "/MyMobileDownlod";File path1 = new File(path);if (!path1.exists())// 若不存在，创建目录，可以在应用启动的时候创建path1.mkdirs();path = path + "/" + filename;return path;}}