最近有个需求,需要在app中显示ppt,第一反应就是从文件管理中选择ppt,然后用第三方控件显示,结果ios开发人员跟我说在ios上可以直接选择打开方式,比如微信接收到一个ppt,然后选择打开,会弹出一个列表,可以选择自己的app打开。当时我就觉得很好奇了,然后我也试验了下,发现除了offic软件,百度网盘也在列表中,那么说明是可以设置的。果不其然,在网上一番搜索后,找到
<intent-filter tools:ignore="AppLinkUrlError">
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<data android:mimeType="*/*"/>
</intent-filter>
补充:
如果需要设置多个类型,又不想设置成全类型,只需要多写几个mineType就可以了,比如我项目中只允许ppt、pptx、pdf类型的文件,只需要如下设置即可
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="application/pdf"/>
<data android:mimeType="application/vnd.openxmlformats-officedocument.presentationml.presentation"/>
<data android:mimeType="application/vnd.ms-powerpoint"/>
</intent-filter>
再补充个从APP中去选择本地文件的方法,同样是允许三个类型的文件
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent .setType("*/*");
String[] mimeTypes = {"application/vnd.ms-powerpoint", "application/pdf","application/vnd.openxmlformats-officedocument.presentationml.presentation"};
intent .putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, INTENT_FILE);
但是我有个问题,要是有知道的,可以给我留言哈,
我从app外选择通过app打开。可以通过getIntent().getType();
方法获取文件类型,但是从文件管理去选择,返回在onActivityResult
中用同样的方法,却不行,type为null
还有其它常用的如:更多
text/plainl(纯文本)
text/html(HTML文档)
application/xhtml+xml(XHTML文档)
image/gif(GIF图像)
image/jpeg(JPEG图像)【PHP中为:image/pjpeg】
image/png(PNG图像)【PHP中为:image/x-png】
video/mpeg(MPEG动画)
application/octet-stream(任意的二进制数据)
application/pdf(PDF文档)
application/vnd.ms-powerpoint(PPT文档)
application/vnd.openxmlformats-officedocument.presentationml.presentation(PPTX文档)
application/msword(Microsoft Word文件)
message/rfc822(RFC 822形式)
multipart/alternative(HTML邮件的HTML形式和纯文本形式,相同内容使用不同形式表示)
application/x-www-form-urlencoded(使用HTTP的POST方法提交的表单)
multipart/form-data(同上,但主要用于表单提交时伴随文件上传的场合)
2:在java文件的onCreate中设置, str就是文件的路径
Intent intent = getIntent();
String action = intent.getAction();
//将文件复制到制定目录中
if (Intent.ACTION_VIEW.equals(action)) {
Uri uri = intent.getData();
String str = Uri.decode(uri.getEncodedPath());
}
补充:
我发现,在华为手机上测试时,str为/external/file/2255
,然后读取文件提示文件不存在,查看文件详情发现地址的确不是这个。
下面直接记录下代码
String path = uri2Path(this, uri);
public String uri2Path(Context context, Uri uri) {
String path;
if ("file".equalsIgnoreCase(uri.getScheme())) {//使用第三方应用打开
path = uri.getPath();
} else {
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT) {//4.4以后
path = getPath(context, uri);
} else {//4.4以下下系统调用方法
path = getRealPathFromURI(uri);
}
}
return path;
}
private String getPath(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
} else if (isDownloadsDocument(uri)) { // DownloadsProvider
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(uri)) { // MediaProvider
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{split[1]};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
} else if ("content".equalsIgnoreCase(uri.getScheme())) {// MediaStore (and general)
return getDataColumn(context, uri, null, null);
} else if ("file".equalsIgnoreCase(uri.getScheme())) {// File
return uri.getPath();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
private boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
private boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
private String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {column};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
private boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
private String getRealPathFromURI(Uri contentUri) {
String res = null;
String[] pro = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(contentUri, pro, null, null, null);
if (null != cursor && cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
res = cursor.getString(column_index);
cursor.close();
}
return res;
}