如何用默认的关联程序打开一个文件

如何用Java中的默认关联程序打开一个文件？ （例如电影文件）

Answer 1

您可以使用Desktop.getDesktop().open(File file) 。 对于其他选项，请参阅以下问题：“ [Java]如何为给定文件打开用户系统优先编辑器？ ”

Answer 2

SwingHacks为老版本的Java提供了一个解决scheme。

我认为他们使用Runtime对象在Windows上执行'start'命令，并且在mac上也有类似的命令。

Answer 3

干得好：

 File myFile = new File("your any type of file url"); FileOpen.openFile(mContext, myFile); 

在包中创build一个不同的类：

 // code to open default application present in the handset public class FileOpen { public static void openFile(Context context, File url) throws IOException { // Create URI File file=url; Uri uri = Uri.fromFile(file); Intent intent = new Intent(Intent.ACTION_VIEW); // Check what kind of file you are trying to open, by comparing the url with extensions. // When the if condition is matched, plugin sets the correct intent (mime) type, // so Android knew what application to use to open the file if (url.toString().contains(".doc") || url.toString().contains(".docx")) { // Word document intent.setDataAndType(uri, "application/msword"); } else if(url.toString().contains(".pdf")) { // PDF file intent.setDataAndType(uri, "application/pdf"); } else if(url.toString().contains(".ppt") || url.toString().contains(".pptx")) { // Powerpoint file intent.setDataAndType(uri, "application/vnd.ms-powerpoint"); } else if(url.toString().contains(".xls") || url.toString().contains(".xlsx")) { // Excel file intent.setDataAndType(uri, "application/vnd.ms-excel"); } else if(url.toString().contains(".zip") || url.toString().contains(".rar")) { // WAV audio file intent.setDataAndType(uri, "application/x-wav"); } else if(url.toString().contains(".rtf")) { // RTF file intent.setDataAndType(uri, "application/rtf"); } else if(url.toString().contains(".wav") || url.toString().contains(".mp3")) { // WAV audio file intent.setDataAndType(uri, "audio/x-wav"); } else if(url.toString().contains(".gif")) { // GIF file intent.setDataAndType(uri, "image/gif"); } else if(url.toString().contains(".jpg") || url.toString().contains(".jpeg") || url.toString().contains(".png")) { // JPG file intent.setDataAndType(uri, "image/jpeg"); } else if(url.toString().contains(".txt")) { // Text file intent.setDataAndType(uri, "text/plain"); } else if(url.toString().contains(".3gp") || url.toString().contains(".mpg") || url.toString().contains(".mpeg") || url.toString().contains(".mpe") || url.toString().contains(".mp4") || url.toString().contains(".avi")) { // Video files intent.setDataAndType(uri, "video/*"); } else { //if you want you can also define the intent type for any other file //additionally use else clause below, to manage other unknown extensions //in this case, Android will show all applications installed on the device //so you can choose which application to use intent.setDataAndType(uri, "*/*"); } intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intent); } }