EditText 禁止软件盘 , 但是又能聚焦显示光标

这几天需要弄一个短信验证码输入框,输入框是一个继承自EditText的ClearableEditText,输入时候用的键盘是自定义的一个键盘,也就是说点击EditText的时候不能弹出系统键盘.
如果按正常逻辑 我们会在代码中直接设置EditText的InputType为InputType.TYPE_NULL 即

mSmsCodeInputEditText.setInputType(InputType.TYPE_NULL);

这时候我们发现EditText上那个一闪一闪的光标没了.这样的显示效果不够友好.

解决方法:
在xml布局文件中

android:inputType="none"

代码中设置:

mSmsCodeInputEditText.setOnTouchListener(new OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                int inType = mSmsCodeInputEditText.getInputType();
                mSmsCodeInputEditText.setInputType(InputType.TYPE_NULL);
                mSmsCodeInputEditText.onTouchEvent(event);
                mSmsCodeInputEditText.setInputType(inType);
                CharSequence text = mSmsCodeInputEditText.getText();
                if (text instanceof Spannable) {
                    Spannable spanText = (Spannable) text;
                    Selection.setSelection(spanText, text.length());
                }
                return true;
            }
        });

即可完美解决问题.在点击的时候执行onTouchEvent之前将其InputType设置位null这时候键盘不会弹出来了,执行完onTouchEvent(弹键盘的操作就是在onTouchEvent)中,我们可以查看TextView的源码

public boolean onTouchEvent(MotionEvent event) {
        final int action = event.getActionMasked();

        if (mEditor != null) mEditor.onTouchEvent(event);

        final boolean superResult = super.onTouchEvent(event);

        /*
         * Don't handle the release after a long press, because it will
         * move the selection away from whatever the menu action was
         * trying to affect.
         */
        if (mEditor != null && mEditor.mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
            mEditor.mDiscardNextActionUp = false;
            return superResult;
        }

        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
                (mEditor == null || !mEditor.mIgnoreActionUpEvent) && isFocused();

         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
                && mText instanceof Spannable && mLayout != null) {
            boolean handled = false;

            if (mMovement != null) {
                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
            }

            final boolean textIsSelectable = isTextSelectable();
            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && textIsSelectable) {
                // The LinkMovementMethod which should handle taps on links has not been installed
                // on non editable text that support text selection.
                // We reproduce its behavior here to open links for these.
                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
                        getSelectionEnd(), ClickableSpan.class);
                if (links.length > 0) {
                    links[0].onClick(this);
                    handled = true;
                }
            }
            if (touchIsFinished && (isTextEditable() || textIsSelectable)) {
                // Show the IME, except when selecting in read-only text.
                final InputMethodManager imm = InputMethodManager.peekInstance();
                viewClicked(imm);
                if (!textIsSelectable && mEditor.mShowSoftInputOnFocus) {
                    handled |= imm != null && imm.showSoftInput(this, 0);
                }
                // The above condition ensures that the mEditor is not null
                mEditor.onTouchUpEvent(event);

                handled = true;
            }
            if (handled) {
                return true;
            }
        }
        return superResult;
    }

看上面倒数第二个if,弹键盘的操作就在这个if判断语句里 imm.showSoftInput(this, 0);
再看isTextEditable()的实现:

boolean isTextEditable() {
        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
    }

@Override
    public boolean onCheckIsTextEditor() {
        return mEditor != null && mEditor.mInputType != EditorInfo.TYPE_NULL;
    }

可以看到如果mInputType是TYPE_NULL(0x00000000),条件不成立,键盘不弹起来.

当执行完onTouchEvent之后再将EditText的InputType设置为原先的类型.

注意: 在xml布局文件中设置EditText的inputType为none(android:inputType="none"),它的实际值和TYPE_NULL是不一样的. 所以不要将在xml文件中设置android:inputType="none" 的效果等同于在代码中设置text.setInputType(InputType.TYPE_NULL); 这两个设置完之后EditText的getInputType得到的值是不一样的.
android:inputType="none" getInputType的值对应 0x00020001
text.setInputType(InputType.TYPE_NULL); 对应0x00000000