Android 下载并打开PDF,Doc,Dwg文档实例

  Intent intent = act.getIntent();  final String Strname = intent.getStringExtra("docurl");  //截取最后14位 作为文件名  String s = Strname.substring(Strname.length()-14);  //文件存储  file1 = new File(Environment.getExternalStorageDirectory(), getFileName(s));  new Thread() {   public void run() {    File file = new File( file1.getAbsolutePath());    //判断是否有此文件    if (file.exists()) {     //有缓存文件,拿到路径 直接打开     Message msg = Message.obtain();     msg.obj = haha;     msg.what = DOWNLOAD_SUCCESS;     handler.sendMessage(msg);     mProgressDialog.dismiss();     return;    }//    本地没有此文件 则从网上下载打开    File downloadfile = downLoad(Strname, file1.getAbsolutePath(), mProgressDialog);//    Log.i("Log",file1.getAbsolutePath());    Message msg = Message.obtain();    if (downloadfile != null) {     // 下载成功,安装....     msg.obj = downloadfile;     msg.what = DOWNLOAD_SUCCESS;    } else {     // 提示用户下载失败.     msg.what = DOWNLOAD_ERROR;    }    handler.sendMessage(msg);    mProgressDialog.dismiss();   };  }.start();

 public static File downLoad(String serverpath, String savedfilepath, ProgressDialog pd) {  try {   URL url = new URL(serverpath);   HttpURLConnection conn = (HttpURLConnection) url.openConnection();   conn.setConnectTimeout(5000);   if (conn.getResponseCode() == 200) {    int max = conn.getContentLength();    pd.setMax(max);    InputStream is = conn.getInputStream();    File file = new File(savedfilepath);    FileOutputStream fos = new FileOutputStream(file);    int len = 0;    byte[] buffer = new byte[1024];    int total = 0;    while ((len = is.read(buffer)) != -1) {     fos.write(buffer, 0, len);     total += len;     pd.setProgress(total);    }    fos.flush();    fos.close();    is.close();    return file;   } else {    return null;   }  } catch (Exception e) {   e.printStackTrace();  } }

Handler handler = new Handler() {  public void handleMessage(android.os.Message msg) {   switch (msg.what) {   case DOWNLOAD_SUCCESS:    File file = (File) msg.obj;    Intent intent = new Intent("android.intent.action.VIEW");    intent.addCategory("android.intent.category.DEFAULT");    intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);    intent.setDataAndType (Uri.fromFile(file), "application/pdf");//    startActivity(intent);    startActivity(Intent.createChooser(intent, "标题"));    /**     * 弹出选择框之后 把本activity销毁     */    finish();    break;   case DOWNLOAD_ERROR:    Util.showToast(act,"文件加载失败");    break;   }  } };

public class list_item_doc extends BaseActivity { private ProgressDialog mProgressDialog; // 下载失败 public static final int DOWNLOAD_ERROR = 2; // 下载成功 public static final int DOWNLOAD_SUCCESS = 1; private File file1; @Override protected void onCreate(Bundle arg0) {  // TODO Auto-generated method stub  super.onCreate(arg0);  initView(); } private void initView() {  // TODO Auto-generated method stub  Intent intent = act.getIntent();  final String Strname = intent.getStringExtra("url");  mProgressDialog = new ProgressDialog(act);  mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);  mProgressDialog.setCancelable(false);  mProgressDialog.show();  //截取最后14位 作为文件名  String s = Strname.substring(Strname.length()-14);  //文件存储  file1 = new File(Environment.getExternalStorageDirectory(), getFileName(s));  new Thread() {   public void run() {    File haha = new File( file1.getAbsolutePath());    //判断是否有此文件    if (haha.exists()) {     //有缓存文件,拿到路径 直接打开     Message msg = Message.obtain();     msg.obj = haha;     msg.what = DOWNLOAD_SUCCESS;     handler.sendMessage(msg);     mProgressDialog.dismiss();     return;    }//    本地没有此文件 则从网上下载打开    File downloadfile = downLoad(Strname, file1.getAbsolutePath(), mProgressDialog);//    Log.i("Log",file1.getAbsolutePath());    Message msg = Message.obtain();    if (downloadfile != null) {     // 下载成功,安装....     msg.obj = downloadfile;     msg.what = DOWNLOAD_SUCCESS;    } else {     // 提示用户下载失败.     msg.what = DOWNLOAD_ERROR;    }    handler.sendMessage(msg);    mProgressDialog.dismiss();   };  }.start(); } /**  * 下载完成后 直接打开文件  */ Handler handler = new Handler() {  public void handleMessage(android.os.Message msg) {   switch (msg.what) {   case DOWNLOAD_SUCCESS:    File file = (File) msg.obj;    Intent intent = new Intent("android.intent.action.VIEW");    intent.addCategory("android.intent.category.DEFAULT");    intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);    intent.setDataAndType (Uri.fromFile(file), "application/pdf");//    startActivity(intent);    startActivity(Intent.createChooser(intent, "标题"));    /**     * 弹出选择框 把本activity销毁     */    finish();    break;   case DOWNLOAD_ERROR:    Util.showToast(act,"文件加载失败");    break;   }  } };/** * */ /**  * 传入文件 url 文件路径 和 弹出的dialog 进行 下载文档  */ public static File downLoad(String serverpath, String savedfilepath, ProgressDialog pd) {  try {   URL url = new URL(serverpath);   HttpURLConnection conn = (HttpURLConnection) url.openConnection();   conn.setConnectTimeout(5000);   if (conn.getResponseCode() == 200) {    int max = conn.getContentLength();    pd.setMax(max);    InputStream is = conn.getInputStream();    File file = new File(savedfilepath);      FileOutputStream fos = new FileOutputStream(file);    int len = 0;    byte[] buffer = new byte[1024];    int total = 0;    while ((len = is.read(buffer)) != -1) {     fos.write(buffer, 0, len);     total += len;     pd.setProgress(total);    }    fos.flush();    fos.close();    is.close();    return file;   } else {    return null;   }  } catch (Exception e) {   e.printStackTrace();   return null;  } } public static String getFileName(String serverurl) {  return serverurl.substring(serverurl.lastIndexOf("/") + 1); }}