Method 1: Medittext. setfilters (New inputfilter [] {New inputfilter. lengthfilter (constants. max_text_input_length )}); Method 2: although this method is complex, I prefer this method. Private textwatcher mtextwatcher = new textwatcher (){
Toast mtoast = NULL;
Public void beforetextchanged (charsequence S, int start,
Int count, int after ){
} Public void ontextchanged (charsequence S, int start,
Int before, int count ){
}
Public void aftertextchanged (editable s ){
Int nselstart = 0;
Int nselend = 0;
Boolean novermaxlength = false;
Nselstart = medittext. getselectionstart ();
Nselend = medittext. getselectionend ();
Novermaxlength = (S. Length ()> constants. max_text_input_length )? True: false;
If (novermaxlength ){
If (null = mtoast ){
Mtoast = toast. maketext (mcontext,
R. String. ids_msg_text_over_maxlength,
Toast. length_short );
}
Mtoast. Show ();
S. Delete (nselstart-1, nselend ); Medittext. settextkeepstate (s); // please pay attention to this line to keep the cursor at its original position, while medittext. settext (s) will let the cursor go to the front, // Even adding medittext. setselection (nselstart) does not work.
}
}
}; Android edittext input limit:
Method 1:
// Limit the number of words in the input box
Edittext. addtextchangedlistener (New textwatcher (){
Private charsequence temp;
Private Boolean isedit = true;
Private int selectionstart;
Private int selectionend;
@ Override
Public void beforetextchanged (charsequence S, int arg1, int arg2,
Int arg3 ){
Temp = s;
}
@ Override
Public void ontextchanged (charsequence S, int arg1, int arg2,
Int arg3 ){
}
@ Override
Public void aftertextchanged (editable s ){
Selectionstart = edittext. getselectionstart ();
Selectionend = edittext. getselectionend ();
Log. I ("gongbiao1", "" + selectionstart );
If (temp. Length ()> constant. text_max ){
Toast. maketext (kaguhomeactivity. This,
R. String. edit_content_limit, Toast. length_short)
. Show ();
S. Delete (selectionStart-1, selectionend );
Int tempselection = selectionstart;
Edittext. settext (s );
Edittext. setselection (tempselection );
}
}
});
Method 2:
Edittext can be used to set the filter feature and customize a lengthfilter. When the number of words entered exceeds the limit, a custom prompt is displayed.
// Limit the number of words in the input box
Inputfilter [] Filters = new inputfilter [1];
Filters [0] = new inputfilter. lengthfilter (constant. text_max ){
@ Override
Public charsequence filter (charsequence source, int start, int end,
Spanned DEST, int dstart, int dend ){
If (source. Length ()> 0 & DeST. Length () = constant. text_max ){
If (system. currenttimemillis ()-toasttime)> interval ){
Toasttime = system. currenttimemillis ();
Toast
. Maketext (kaguhomeactivity. This,
R. String. edit_content_limit,
Toast. length_short). Show ();
}
}
If (DEST. tostring (). Equals (
Getresources (). getstring (R. String. input_default_txt ))){
Bundle DATA = new bundle ();
Data. putcharsequence ("Source", source );
Message message = texthandler. obtainmessage ();
Message. setdata (data );
Message. sendtotarget ();
}
Return super. Filter (source, start, end, DEST, dstart, dend );
}
};
Edittext. setfilters (filters );
Private handler texthandler = new handler (){
@ Override
Public void handlemessage (Message MSG ){
Bundle DATA = msg. getdata ();
Charsequence source = data. getcharsequence ("Source ");
Edittext. settextcolor (color. Black );
Edittext. settext (source );
Edittext. setselection (source. Length ());
}
}; |
|
|
