我们经常使用手机的打电话功能，当我们按键盘的时候，有一个地方显示我们按键的内容，当我们的手点击那个地方的时候，并没有弹出软件盘，所以我们再有数字键盘的时候，要屏蔽系统的软件盘。

我们分析一下，软件盘弹出的条件：

1、焦点，当EditText处于焦点的时候，会自动弹出软件盘，所以我们要重写onFocusChanged函数

2、触摸时间，当你点击EditText的时候，那它就会处于焦点，所以我们要重写onTouchEvent函数

3、当布局改变的时候，EditText也会处于焦点，所以我们也应该重写一下layout函数

package com.jwzhangjie.pjsip.ui.dialpad;import android.content.Context;
import android.graphics.Rect;
import android.text.InputType;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.accessibility.AccessibilityEvent;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;/*** 数字输入,暂时不支持字母输入所以把软键盘全部屏蔽* * @author jwzhangjie*/
public class DigitsEditText extends EditText {public DigitsEditText(Context context) {super(context);init();}public DigitsEditText(Context context, AttributeSet attrs) {super(context, attrs);init();}public DigitsEditText(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init();}private void init() {//设置一行显示this.setInputType(InputType.TYPE_NULL);}@Overridepublic boolean onTouchEvent(MotionEvent event) {final boolean ret = super.onTouchEvent(event);// Must be done after super.onTouchEvent()applyKeyboardShowHide();return ret;}@Overridepublic void sendAccessibilityEventUnchecked(AccessibilityEvent event) {if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED) {// Since we're replacing the text every time we add or remove a// character, only read the difference. (issue 5337550)final int added = event.getAddedCount();final int removed = event.getRemovedCount();final int length = event.getBeforeText().length();if (added > removed) {event.setRemovedCount(0);event.setAddedCount(1);event.setFromIndex(length);} else if (removed > added) {event.setRemovedCount(1);event.setAddedCount(0);event.setFromIndex(length - 1);} else {return;}} else if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED) {// The parent EditText class lets tts read "edit box" when this View// has a focus, which// confuses users on app launch (issue 5275935).return;}super.sendAccessibilityEventUnchecked(event);}@Overrideprotected void onLayout(boolean changed, int left, int top, int right,int bottom) {super.onLayout(changed, left, top, right, bottom);// Here we ensure that we hide the keyboard// Since this will be fired when virtual keyboard this will probably// blink but for now no better way were found to hide keyboard for sureapplyKeyboardShowHide();}@Overrideprotected void onFocusChanged(boolean focused, int direction,Rect previouslyFocusedRect) {super.onFocusChanged(focused, direction, previouslyFocusedRect);if (focused) {applyKeyboardShowHide();} else {final InputMethodManager imm = ((InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE));if (imm != null && imm.isActive(this)) {imm.hideSoftInputFromWindow(getApplicationWindowToken(), 0);}}}private void applyKeyboardShowHide() {final InputMethodManager imm = ((InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE));if (imm != null) {if (imm.isActive(this)) {imm.hideSoftInputFromWindow(getApplicationWindowToken(), 0);}}}}