下面的代码可以帮助你
代码文件
写代码来获取文件的URL中的主要功能
File myFile = new File("your any type of file url");
FileOpen.openFile(mContext, myFile);
代码以打开目前在手机默认应用程序 创建另一类
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);
}
}
also u can write this if condition
*** if(url.getPath().endsWith(".jpg") || url.getPath().endsWith(".jpeg")|| url.getPath().endsWith(".png")***
{
intent.setDataAndType(uri,"image/*");
}*
如果我有一个文件的字节[],如果我不想sa把它存入磁盘? – 2011-02-11 14:18:37
@Tom Fobear:你别无选择,只能将它保存到磁盘中,放在另一个应用程序可以读取的地方。这意味着要么将其存储在外部存储器中,要么将其作为“MODE_WORLD_READABLE”文件存储在应用程序本地文件存储中,或将其作为普通(拒绝全部)文件存储在应用程序本地文件存储中,并使用内容提供程序使其可用于其他应用程序。 – CommonsWare 2011-02-11 14:26:15