如何为pdf,xlsx和txt文件android制作intent.setType？

Question

我想从存储中仅选择pdf,xlsx和txt文件,但intent.setType只能执行一个文件(仅限eg.txt文件(或)pdf文件).是否可以通过编码intent.setType()来获取所有三个文件,并且有办法吗？

这是我的一些代码.

  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

    }
}

Answer 1

@Fatehali Asamadi的方式还可以,但需要添加一些适当的用途.对于Microsoft文档,使用(.doc或.docx),(.pt或.pptx),(.xls或.xlsx)扩展名.要支持或浏览这些扩展,您需要添加更多mimeTypes.

使用以下方法浏览REQUEST_CODE_DOC为onActivityResult(final int requestCode,final int resultCode,final Intent data)@Override方法的requestCode的文档.

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);

}

您可以获得清晰的概念并从此处添加所需的mimeTypes

Answer 2

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

也许这就是你想要的.

Answer 3

您应该检查此链接http://www.androidsnippets.com/open-any-type-of-file-with-default-intent.html。另请阅读 Mime Type。

这就是我为任何文件或选定的 MIME 类型文件实施的方式

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);

Answer 4

看起来你只想知道这些意图是否可以解决.这可能是一种更好的方法:

 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

    }

}

参考文献:

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

如何确定Android是否可以处理PDF

Answer 5

简单的解决方案是

   Intent gallery=new Intent();
        gallery.setType("application/*");
        gallery.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(gallery,pick);

注意：pick 是 int 变量。

Answer 6

您可以使用Intent.ACTION_OPEN_DOCUMENT，

每个文档都表示为由 a 支持的 content:// URI DocumentsProvider，可以使用 来将其作为流打开openFileDescriptor(Uri, String)，或查询DocumentsContract.Document元数据。

所有选定的文档都将返回到调用应用程序，并授予持久的读写权限。如果您想在设备重新启动后保持对文档的访问，则需要使用 显式获取持久权限takePersistableUriPermission(Uri, int)。

调用者必须通过 指示可接受的文档 MIME 类型setType(String)。例如，要选择照片，请使用image/*。如果可以接受多个不相交的 MIME 类型，请在EXTRA_MIME_TYPES和setType(String)to中定义它们*/*。

欲了解更多详情，请参阅此链接

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

请注意，这仅适用于 API 级别 19+。