My findings:
You need several filters to deal with the different ways of retrieving a file. ie, by gmail attachment, by file explorer, by HTTP, by FTP...
They all send very different intents.
And you need to filter out the intent that trigger your activity in your activity code.
For the example below, I created a fake file type new.mrz. And I retrieved it from gmail attachment and file explorer.
Activity code added in the onCreate():
Intent intent = getIntent();
String action = intent.getAction();
if (action.compareTo(Intent.ACTION_VIEW) == 0) {
String scheme = intent.getScheme();
ContentResolver resolver = getContentResolver();
if (scheme.compareTo(ContentResolver.SCHEME_CONTENT) == 0) {
Uri uri = intent.getData();
String name = getContentName(resolver, uri);
Log.v("tag" , "Content intent detected: " + action + " : " + intent.getDataString() + " : " + intent.getType() + " : " + name);
InputStream input = resolver.openInputStream(uri);
String importfilepath = "/sdcard/My Documents/" + name;
InputStreamToFile(input, importfilepath);
}
else if (scheme.compareTo(ContentResolver.SCHEME_FILE) == 0) {
Uri uri = intent.getData();
String name = uri.getLastPathSegment();
Log.v("tag" , "File intent detected: " + action + " : " + intent.getDataString() + " : " + intent.getType() + " : " + name);
InputStream input = resolver.openInputStream(uri);
String importfilepath = "/sdcard/My Documents/" + name;
InputStreamToFile(input, importfilepath);
}
else if (scheme.compareTo("http") == 0) {
// TODO Import from HTTP!
}
else if (scheme.compareTo("ftp") == 0) {
// TODO Import from FTP!
}
}
Gmail attachement filter:
<intent-filter android:label="@string/app_name">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="content" />
<data android:mimeType="application/octet-stream" />
</intent-filter>
- LOG: Content intent detected: android.intent.action.VIEW : content://gmail-ls/l.foul@gmail.com/messages/2950/attachments/0.1/BEST/false : application/octet-stream : new.mrz
File explorer filter:
<intent-filter android:label="@string/app_name">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="file" />
<data android:pathPattern=".*\\.mrz" />
</intent-filter>
- LOG: File intent detected: android.intent.action.VIEW : file:///storage/sdcard0/My%20Documents/new.mrz : null : new.mrz
HTTP filter:
<intent-filter android:label="@string/rbook_viewer">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="http" />
<data android:pathPattern=".*\\.mrz" />
</intent-filter>
Private functions used above:
private String getContentName(ContentResolver resolver, Uri uri){
Cursor cursor = resolver.query(uri, null, null, null, null);
cursor.moveToFirst();
int nameIndex = cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME);
if (nameIndex >= 0) {
return cursor.getString(nameIndex);
} else {
return null;
}
}
private void InputStreamToFile(InputStream in, String file) {
try {
OutputStream out = new FileOutputStream(new File(file));
int size = 0;
byte[] buffer = new byte[1024];
while ((size = in.read(buffer)) != -1) {
out.write(buffer, 0, size);
}
out.close();
}
catch (Exception e) {
Log.e("MainActivity", "InputStreamToFile exception: " + e.getMessage());
}
}
