Search and purge effects in text boxes in Android programming

Body

First, the realization effect

　　Second, the implementation of the Code

Listening for input

/**

* Dynamic Search

*/

Private Textwatcher tbxsearch_textchanged = new Textwatcher () {

Whether the cache was empty in the previous text box

Private Boolean isnull = true;

@Override

public void aftertextchanged (Editable s) {

if (Textutils.isempty (s)) {

if (!isnull) {

Msearchview.setcompounddrawableswithintrinsicbounds (NULL,

NULL, miconsearchdefault, NULL);

IsNull = true;

}

} else {

if (IsNull) {

Msearchview.setcompounddrawableswithintrinsicbounds (NULL,

NULL, miconsearchclear, NULL);

IsNull = false;

}

}

}

@Override

public void beforetextchanged (charsequence s, int start, int count,

int after) {

}

/**

* Change the contents of the list dynamically as the contents of the text box change

*/

@Override

public void ontextchanged (charsequence s, int start, int before,

int count) {

}

};

Touch events

Private Ontouchlistener Txtsearch_ontouch = new Ontouchlistener () {

@Override

public boolean Ontouch (View V, motionevent event) {

Switch (event.getaction ()) {

Case MOTIONEVENT.ACTION_UP:

int CurX = (int) event.getx ();

if (CurX > V.getwidth ()-38

&&! Textutils.isempty (Msearchview.gettext ()) {

Msearchview.settext ("");

int cacheinputtype = Msearchview.getinputtype ();//backup the input type

Msearchview.setinputtype (inputtype.type_null);//Disable soft input

Msearchview.ontouchevent (event);/Call Native Handler

Msearchview.setinputtype (Cacheinputtype);//Restore input type

Return true;//consume touch even

}

Break

}

return false;

}

};

Binding events

Private drawable Miconsearchdefault; Search text box default icon

Private drawable miconsearchclear; Search text box Clear text content icon

@Override

protected void OnCreate (Bundle savedinstancestate) {

Super.oncreate (savedinstancestate);

Setcontentview (R.layout.main)

Final Resources res = getresources ();

Miconsearchdefault = res.getdrawable (R.drawable.txt_search_default);

Miconsearchclear = res.getdrawable (r.drawable.txt_search_clear);

Msearchview = (edittext) Findviewbyid (R.id.txtsearch);

Msearchview.addtextchangedlistener (tbxsearch_textchanged);

Msearchview.setontouchlistener (Txtsearch_ontouch);

}

　　Code Description:

1. Bind the Touch event (analog click event Capture) for the input frame. Click to clear the image by listening to the click area and empty the text box if the area is not empty.

2. For the input box bound text to change the event listener, according to the content Change dynamic settings icon display.

3. Maintain the soft keyboard state after emptying operation.