EditText Focus Issues in Android

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Problem: Do content verification when EditText loses focus

Scenario: User edits EditText are emptied, the soft keyboard is turned off when a blank space is clicked, and the contents of the checksum are EditText set to "1" if empty.
The problem is far from easy to see.

First step: Add focus monitoring

view.setOnFocusChangeListener(new OnFocusChangeListener() {            @Override            public void onFocusChange(View v, boolean hasFocus) { if(!hasFocus){ Log.d("Tag","lose focus"); if(TextUtils.isEmpty(((EditText)v).getText().toString().trim())){ view.setText("1"); } }else { Log.d("Tag","get focus"); } } });

Step two: Turn off the soft keyboard when you click on a blank Space

Use the following code in the activity:

 @OverridePublicBooleanDispatchtouchevent(Motionevent ev) {if (ev.getaction () = = Motionevent.action_down) {View v = getcurrentfocus ();if (Isshouldhideinput (v, Ev)) {Inputmethodmanager IMM = (inputmethodmanager) getsystemservice (context.input_method_ SERVICE);if (IMM! =NULL) {Imm.hidesoftinputfromwindow (V.getwindowtoken (),0); } }ReturnSuper.dispatchtouchevent (EV); }necessary, otherwise all the components will not be touchevent.if (GetWindow (). superdispatchtouchevent (EV)) {ReturnTrue }return ontouchevent (EV); }PublicBooleanIsshouldhideinput(View V, motionevent event) {if (v! =Null && (Vinstanceof EditText)) {Int[] Lefttop = {0,0};Gets the current location position of the input box V.getlocationinwindow (lefttop);int left = lefttop[0];int top = lefttop[1]; int bottom = top + v.getheight (); int right = left + v.getwidth (); if (Event.getx () > Left && event.getx () < right && event.gety () > Top && event.gety () < bottom) {//click on the input box area and leave the Click EditText event return FALSE;} else {//causes EditText to trigger a lost Focus event v.setfocusable (false); //v.setfocusable (TRUE);//This is not required because the following code will implement this function at the same time V.setfocusableintouchmode (true); return true;} return false;}        

Add the above code and you are pleasantly surprised to find that the problem seems to be a perfect solution. However, if you have more than one interface EditText , you will find that when you click on the first one EditText , the second one EditText will have the following cursor, or click the second or later EditText , the first one EditText will have a cursor flash. Through log you will find that from the second click EditText , each click EditText will first trigger a loss of focus, and then trigger a focus. This can infer that when there are multiple EditText , one EditText loses focus triggers another to get the focus. This problem must be resolved, and the presence of a screen cursor flashing affects the user experience.

Step three: Avoid another edittext get focus

The solution to this problem is to set the following property in the same XML for a control that will not respond, such as TextView :

android:focusable="true"android:focusableInTouchMode="true"

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EditText Focus Issues in Android