问题
I'm trying to displaying a device supported format programmatically. i have found this on the internet. the question is, how to display those ? please help me, im newbie in Android development.
Here is the code for checking file format of the device.
package com.android.mmscommon;
import java.util.ArrayList;
public class ContentType {
public static final String MMS_MESSAGE = "application/vnd.wap.mms-message";
// The phony content type for generic PDUs (e.g. ReadOrig.ind,
// Notification.ind, Delivery.ind).
public static final String MMS_GENERIC = "application/vnd.wap.mms-generic";
public static final String MULTIPART_MIXED = "application/vnd.wap.multipart.mixed";
public static final String MULTIPART_RELATED = "application/vnd.wap.multipart.related";
public static final String MULTIPART_ALTERNATIVE = "application/vnd.wap.multipart.alternative";
public static final String TEXT_PLAIN = "text/plain";
public static final String TEXT_HTML = "text/html";
public static final String TEXT_VCALENDAR = "text/x-vCalendar";
public static final String TEXT_VCARD = "text/x-vCard";
public static final String IMAGE_UNSPECIFIED = "image/*";
public static final String IMAGE_JPEG = "image/jpeg";
public static final String IMAGE_JPG = "image/jpg";
public static final String IMAGE_GIF = "image/gif";
public static final String IMAGE_WBMP = "image/vnd.wap.wbmp";
public static final String IMAGE_PNG = "image/png";
public static final String AUDIO_UNSPECIFIED = "audio/*";
public static final String AUDIO_AAC = "audio/aac";
public static final String AUDIO_AMR = "audio/amr";
public static final String AUDIO_IMELODY = "audio/imelody";
public static final String AUDIO_MID = "audio/mid";
public static final String AUDIO_MIDI = "audio/midi";
public static final String AUDIO_MP3 = "audio/mp3";
public static final String AUDIO_MPEG3 = "audio/mpeg3";
public static final String AUDIO_MPEG = "audio/mpeg";
public static final String AUDIO_MPG = "audio/mpg";
public static final String AUDIO_MP4 = "audio/mp4";
public static final String AUDIO_X_MID = "audio/x-mid";
public static final String AUDIO_X_MIDI = "audio/x-midi";
public static final String AUDIO_X_MP3 = "audio/x-mp3";
public static final String AUDIO_X_MPEG3 = "audio/x-mpeg3";
public static final String AUDIO_X_MPEG = "audio/x-mpeg";
public static final String AUDIO_X_MPG = "audio/x-mpg";
public static final String AUDIO_3GPP = "audio/3gpp";
public static final String AUDIO_OGG = "application/ogg";
public static final String VIDEO_UNSPECIFIED = "video/*";
public static final String VIDEO_3GPP = "video/3gpp";
public static final String VIDEO_3G2 = "video/3gpp2";
public static final String VIDEO_H263 = "video/h263";
public static final String VIDEO_MP4 = "video/mp4";
public static final String APP_SMIL = "application/smil";
public static final String APP_WAP_XHTML = "application/vnd.wap.xhtml+xml";
public static final String APP_XHTML = "application/xhtml+xml";
public static final String APP_DRM_CONTENT = "application/vnd.oma.drm.content";
public static final String APP_DRM_MESSAGE = "application/vnd.oma.drm.message";
private static final ArrayList<String> sSupportedContentTypes = new ArrayList<String>();
private static final ArrayList<String> sSupportedImageTypes = new ArrayList<String>();
private static final ArrayList<String> sSupportedAudioTypes = new ArrayList<String>();
private static final ArrayList<String> sSupportedVideoTypes = new ArrayList<String>();
static {
sSupportedContentTypes.add(TEXT_PLAIN);
sSupportedContentTypes.add(TEXT_HTML);
sSupportedContentTypes.add(TEXT_VCALENDAR);
sSupportedContentTypes.add(TEXT_VCARD);
sSupportedContentTypes.add(IMAGE_JPEG);
sSupportedContentTypes.add(IMAGE_GIF);
sSupportedContentTypes.add(IMAGE_WBMP);
sSupportedContentTypes.add(IMAGE_PNG);
sSupportedContentTypes.add(IMAGE_JPG);
//supportedContentTypes.add(IMAGE_SVG); not yet supported.
sSupportedContentTypes.add(AUDIO_AAC);
sSupportedContentTypes.add(AUDIO_AMR);
sSupportedContentTypes.add(AUDIO_IMELODY);
sSupportedContentTypes.add(AUDIO_MID);
sSupportedContentTypes.add(AUDIO_MIDI);
sSupportedContentTypes.add(AUDIO_MP3);
sSupportedContentTypes.add(AUDIO_MPEG3);
sSupportedContentTypes.add(AUDIO_MPEG);
sSupportedContentTypes.add(AUDIO_MPG);
sSupportedContentTypes.add(AUDIO_X_MID);
sSupportedContentTypes.add(AUDIO_X_MIDI);
sSupportedContentTypes.add(AUDIO_X_MP3);
sSupportedContentTypes.add(AUDIO_X_MPEG3);
sSupportedContentTypes.add(AUDIO_X_MPEG);
sSupportedContentTypes.add(AUDIO_X_MPG);
sSupportedContentTypes.add(AUDIO_3GPP);
sSupportedContentTypes.add(AUDIO_OGG);
sSupportedContentTypes.add(VIDEO_3GPP);
sSupportedContentTypes.add(VIDEO_3G2);
sSupportedContentTypes.add(VIDEO_H263);
sSupportedContentTypes.add(VIDEO_MP4);
sSupportedContentTypes.add(APP_SMIL);
sSupportedContentTypes.add(APP_WAP_XHTML);
sSupportedContentTypes.add(APP_XHTML);
sSupportedContentTypes.add(APP_DRM_CONTENT);
sSupportedContentTypes.add(APP_DRM_MESSAGE);
// add supported image types
sSupportedImageTypes.add(IMAGE_JPEG);
sSupportedImageTypes.add(IMAGE_GIF);
sSupportedImageTypes.add(IMAGE_WBMP);
sSupportedImageTypes.add(IMAGE_PNG);
sSupportedImageTypes.add(IMAGE_JPG);
// add supported audio types
sSupportedAudioTypes.add(AUDIO_AAC);
sSupportedAudioTypes.add(AUDIO_AMR);
sSupportedAudioTypes.add(AUDIO_IMELODY);
sSupportedAudioTypes.add(AUDIO_MID);
sSupportedAudioTypes.add(AUDIO_MIDI);
sSupportedAudioTypes.add(AUDIO_MP3);
sSupportedAudioTypes.add(AUDIO_MPEG3);
sSupportedAudioTypes.add(AUDIO_MPEG);
sSupportedAudioTypes.add(AUDIO_MPG);
sSupportedAudioTypes.add(AUDIO_MP4);
sSupportedAudioTypes.add(AUDIO_X_MID);
sSupportedAudioTypes.add(AUDIO_X_MIDI);
sSupportedAudioTypes.add(AUDIO_X_MP3);
sSupportedAudioTypes.add(AUDIO_X_MPEG3);
sSupportedAudioTypes.add(AUDIO_X_MPEG);
sSupportedAudioTypes.add(AUDIO_X_MPG);
sSupportedAudioTypes.add(AUDIO_3GPP);
sSupportedAudioTypes.add(AUDIO_OGG);
// add supported video types
sSupportedVideoTypes.add(VIDEO_3GPP);
sSupportedVideoTypes.add(VIDEO_3G2);
sSupportedVideoTypes.add(VIDEO_H263);
sSupportedVideoTypes.add(VIDEO_MP4);
}
// This class should never be instantiated.
private ContentType() {
}
public static boolean isSupportedType(String contentType) {
return (null != contentType) && sSupportedContentTypes.contains(contentType);
}
public static boolean isSupportedImageType(String contentType) {
return isImageType(contentType) && isSupportedType(contentType);
}
public static boolean isSupportedAudioType(String contentType) {
return isAudioType(contentType) && isSupportedType(contentType);
}
public static boolean isSupportedVideoType(String contentType) {
return isVideoType(contentType) && isSupportedType(contentType);
}
public static boolean isTextType(String contentType) {
return (null != contentType) && contentType.startsWith("text/");
}
public static boolean isImageType(String contentType) {
return (null != contentType) && contentType.startsWith("image/");
}
public static boolean isAudioType(String contentType) {
return (null != contentType) && contentType.startsWith("audio/");
}
public static boolean isVideoType(String contentType) {
return (null != contentType) && contentType.startsWith("video/");
}
public static boolean isDrmType(String contentType) {
return (null != contentType)
&& (contentType.equals(APP_DRM_CONTENT)
|| contentType.equals(APP_DRM_MESSAGE));
}
public static boolean isUnspecified(String contentType) {
return (null != contentType) && contentType.endsWith("*");
}
@SuppressWarnings("unchecked")
public static ArrayList<String> getImageTypes() {
return (ArrayList<String>) sSupportedImageTypes.clone();
}
@SuppressWarnings("unchecked")
public static ArrayList<String> getAudioTypes() {
return (ArrayList<String>) sSupportedAudioTypes.clone();
}
@SuppressWarnings("unchecked")
public static ArrayList<String> getVideoTypes() {
return (ArrayList<String>) sSupportedVideoTypes.clone();
}
@SuppressWarnings("unchecked")
public static ArrayList<String> getSupportedTypes() {
return (ArrayList<String>) sSupportedContentTypes.clone();
}
}
回答1:
Here is the full list : https://www.iana.org/assignments/media-types/media-types.xhtml
It is referenced in the android documentation here: https://developer.android.com/guide/topics/providers/content-provider-creating.html#MIMETypes
Note that these MIME types are supported only if the user has the appropriate app for it. I don't think that you can display the supported MIME types programmatically. However you can check if the one that you want to use is supported using code like this :
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(someUri, "YOUR_MIME_TYPE_HERE");
if(intent.resolveActivity(activity.getPackageManager()) != null)
{
lActivity.startActivity(intent);
}
else
{
Log.w(TAG, "There is no application for this MIME type");
}
来源：https://stackoverflow.com/questions/39663818/how-do-i-display-a-list-of-all-mime-types-supported-by-a-given-android-device