kiana rahimi kiana rahimi - 5 months ago 41
Android Question

Error handling for intents

I have this helper class , it handle opening all extensions file . But when i run app in some devices that haven't related apps to intent it's crash for example when i want to open zip file if device doesn't have related app (like winrar) ' it's crash and say :


No activity found to handle intent .


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);
}
}


I want to handle this error . what you think a bout that ?

Answer

you have to catch this exception and alarm the user

try {

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(intent);

} catch (ActivityNotFoundException e) {
                Toast.makeText(this, 
                    "No Application Available to view this file type", 
                    Toast.LENGTH_SHORT).show();
            }