how to make intent.setType for pdf,xlsx and txt fi

问题:

I want to choose only pdf, xlsx and txt file from storage but intent.setType can do only one file(eg.txt file only (or) pdf file only). Is it possible to get all three files by coding intent.setType() and Is there a way to do?

Here is some of my code.

  private void showFileChooser() {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("application/pdf");
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    try {
        startActivityForResult(
                Intent.createChooser(intent, "Select txt file"),
                0);
    } catch (android.content.ActivityNotFoundException ex) {
        // Potentially direct the user to the Market with a Dialog

    }
}

回答1:

@Fatehali Asamadi's way is OK, but need to add something for appropriate use. For Microsoft documents both (.doc or .docx), (.ppt or .pptx), (.xls or .xlsx) extensions are used. To support or browse these extensions you need to add more mimeTypes.

Use below method to browse documents where REQUEST_CODE_DOC is requestCode for onActivityResult(final int requestCode, final int resultCode,final Intent data) @Override method.

private void browseDocuments(){

    String[] mimeTypes =
            {"application/msword","application/vnd.openxmlformats-officedocument.wordprocessingml.document", // .doc & .docx
                    "application/vnd.ms-powerpoint","application/vnd.openxmlformats-officedocument.presentationml.presentation", // .ppt & .pptx
                    "application/vnd.ms-excel","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", // .xls & .xlsx
                    "text/plain",
                    "application/pdf",
                    "application/zip"};

    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        intent.setType(mimeTypes.length == 1 ? mimeTypes[0] : "*/*");
        if (mimeTypes.length > 0) {
            intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);
        }
    } else {
        String mimeTypesStr = "";
        for (String mimeType : mimeTypes) {
            mimeTypesStr += mimeType + "|";
        }
        intent.setType(mimeTypesStr.substring(0,mimeTypesStr.length() - 1));
    }
    startActivityForResult(Intent.createChooser(intent,"ChooseFile"), REQUEST_CODE_DOC);

}

You can get clear concept and add your required mimeTypes from Here

回答2:

intent.setType("image/*|application/pdf|audio/*");

Maybe this is what you want.

回答3:

It looks like you just want to see if those intents can be resolved. This might be a better approach:

 private void showFileChooser() {

    Intent intentPDF = new Intent(Intent.ACTION_GET_CONTENT);
    intentPDF.setType("application/pdf");
    intentPDF.addCategory(Intent.CATEGORY_OPENABLE);

    Intent intentTxt = new Intent(Intent.ACTION_GET_CONTENT);
    intentTxt.setType("text/plain");
    intentTxt.addCategory(Intent.CATEGORY_OPENABLE);

    Intent intentXls = new Intent(Intent.ACTION_GET_CONTENT);
    intentXls.setType("application/x-excel");
    intentXls.addCategory(Intent.CATEGORY_OPENABLE);

    PackageManager packageManager = getPackageManager();

    List activitiesPDF = packageManager.queryIntentActivities(intentPDF,
    PackageManager.MATCH_DEFAULT_ONLY);
    boolean isIntentSafePDF = activitiesPDF.size() > 0;

    List activitiesTxt = packageManager.queryIntentActivities(intentTxt,
    PackageManager.MATCH_DEFAULT_ONLY);
    boolean isIntentSafeTxt = activitiesTxt.size() > 0;

    List activitiesXls = packageManager.queryIntentActivities(intentXls,
    PackageManager.MATCH_DEFAULT_ONLY);
    boolean isIntentSafeXls = activitiesXls.size() > 0;

    if (!isIntentSafePDF || !isIntentSafeTxt || !isIntentSafeXls){

        // Potentially direct the user to the Market with a Dialog

    }

}

References:

http://developer.android.com/training/basics/intents/sending.html

How do I determine if Android can handle PDF

回答4:

You can use Intent.ACTION_OPEN_DOCUMENT,

Each document is represented as a content:// URI backed by a DocumentsProvider, which can be opened as a stream with openFileDescriptor(Uri, String), or queried for DocumentsContract.Document metadata.

All selected documents are returned to the calling application with persistable read and write permission grants. If you want to maintain access to the documents across device reboots, you need to explicitly take the persistable permissions using takePersistableUriPermission(Uri, int).

Callers must indicate the acceptable document MIME types through setType(String). For example, to select photos, use image/*. If multiple disjoint MIME types are acceptable, define them in EXTRA_MIME_TYPES and setType(String) to */*.

For the more details, please refer this link

http://developer.android.com/reference/android/content/Intent.html#ACTION_OPEN_DOCUMENT

Note that this is only available on API Level 19+.

回答5:

You should use the system function to find the specific mimeType of the file that you are trying to access(Like the "application/pdf"). If you are dealing with any unknown type, it will probably be hard to find the type. Hope this code will save you !

String url=Environment.getExternalStorageDirectory().getAbsolutePath()+"/Saves/contacts.vcf";
File file = new File(url);
Intent intent = new Intent(Intent.ACTION_VIEW);
String mimeType=MimeTypeMap.getSingleton().getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(url));
intent.setDataAndType(Uri.fromFile(file), mimeType);
Intent intent1 = Intent.createChooser(intent, "Open With");
startActivity(intent1);

Source HERE

回答6:

You should to check this link http://www.androidsnippets.com/open-any-type-of-file-with-default-intent.html. Also read through Mime Type.

This is how I have implemented for any file or selected mime type file

String[] mimeTypes =
{"image/*","application/pdf","application/msword","application/vnd.ms-powerpoint","application/vnd.ms-excel","text/plain"};

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    intent.setType(mimeTypes.length == 1 ? mimeTypes[0] : "*/*");
    if (mimeTypes.length > 0) {
       intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);
    }
} else {
    String mimeTypesStr = "";
    for (String mimeType : mimeTypes) {
        mimeTypesStr += mimeType + "|";
    }
    intent.setType(mimeTypesStr.substring(0,mimeTypesStr.length() - 1));
}
startActivityForResult(Intent.createChooser(intent,"ChooseFile"), 0);