pjsip视频通信开发(上层应用)之EditText重写

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);

	}

	@Override

	public boolean onTouchEvent(MotionEvent event) {

		final boolean ret = super.onTouchEvent(event);

		// Must be done after super.onTouchEvent()

		applyKeyboardShowHide();

		return ret;

	}

	@Override

	public 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);

	}

	@Override

	protected 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 sure

		applyKeyboardShowHide();

	}

	@Override

	protected 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);

			}

		}

	}

}

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pjsip视频通信开发(上层应用)之EditText重写

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