Java 如何使用默认关联程序打开文件
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How to open a file with the default associated program
提问by Frederic Morin
How do I open a file with the default associated program in Java? (for example a movie file)
如何使用 Java 中的默认关联程序打开文件？（例如电影文件）
采纳答案by Zach Scrivena
You can use Desktop.getDesktop().open(File file). See the following question for other options: "[Java] How to open user system preffered editor for given file?"
您可以使用Desktop.getDesktop().open(File file). 有关其他选项，请参阅以下问题：“ [Java] 如何为给定文件打开用户系统首选编辑器？”
回答by l_39217_l
SwingHackshas a solution for older versions of Java.
SwingHacks为旧版本的 Java 提供了解决方案。
I think they used the Runtime object to execute the 'start' command on windows and there is a similar command on the mac.
我认为他们使用 Runtime 对象在 Windows 上执行“开始”命令，Mac 上也有类似的命令。
回答by Vaibhav Joshi
Here you go:
干得好：
File myFile = new File("your any type of file url");
FileOpen.openFile(mContext, myFile);
Create a different class within the package:
在包中创建一个不同的类：
// 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);
}
}
