pjsip视频通信开发(上层应用)之数字键盘的制作

在pjsip视频通信开发(上层应用)之EditText重写中我制作了一个显示输入内容的EditText，这里将制作一个数字键盘，其实跟计算器一样,最多的就是用TableLayout来实现，内部通过权重(weight)来实现布局的统一，上层实现按键事件触发回调实现内容的输出。

键盘布局：

布局设置好之后，我们就要调用布局，设置监听实现回调。
package com.jwzhangjie.pjsip.widgets;import java.util.HashMap;import java.util.Map;import com.jwzhangjie.pjsip.R;import android.annotation.SuppressLint;import android.content.Context;import android.media.ToneGenerator;import android.util.AttributeSet;import android.util.SparseArray;import android.view.View;import android.view.View.OnClickListener;import android.view.KeyEvent;import android.view.LayoutInflater;import android.widget.FrameLayout;import android.widget.ImageButton;public class Dialpad extends FrameLayout implements OnClickListener {private OnDialKeyListener onDialKeyListener;public Dialpad(Context context) {super(context);initLayout(context);}public Dialpad(Context context, AttributeSet attrs) {super(context, attrs);initLayout(context);}private void initLayout(Context context) {LayoutInflater inflater = LayoutInflater.from(context);inflater.inflate(R.layout.dialpad, this, true);}// Here we need a map to quickly find if the clicked button id is in the map// keys,之所以这里不用SparseArrays，因为下面取值的方便@SuppressLint("UseSparseArrays")private static final Map<Integer, int[]> DIGITS_BTNS = new HashMap<Integer, int[]>();static {DIGITS_BTNS.put(R.id.button0, new int[] { ToneGenerator.TONE_DTMF_0,KeyEvent.KEYCODE_0 });DIGITS_BTNS.put(R.id.button1, new int[] { ToneGenerator.TONE_DTMF_1,KeyEvent.KEYCODE_1 });DIGITS_BTNS.put(R.id.button2, new int[] { ToneGenerator.TONE_DTMF_2,KeyEvent.KEYCODE_2 });DIGITS_BTNS.put(R.id.button3, new int[] { ToneGenerator.TONE_DTMF_3,KeyEvent.KEYCODE_3 });DIGITS_BTNS.put(R.id.button4, new int[] { ToneGenerator.TONE_DTMF_4,KeyEvent.KEYCODE_4 });DIGITS_BTNS.put(R.id.button5, new int[] { ToneGenerator.TONE_DTMF_5,KeyEvent.KEYCODE_5 });DIGITS_BTNS.put(R.id.button6, new int[] { ToneGenerator.TONE_DTMF_6,KeyEvent.KEYCODE_6 });DIGITS_BTNS.put(R.id.button7, new int[] { ToneGenerator.TONE_DTMF_7,KeyEvent.KEYCODE_7 });DIGITS_BTNS.put(R.id.button8, new int[] { ToneGenerator.TONE_DTMF_8,KeyEvent.KEYCODE_8 });DIGITS_BTNS.put(R.id.button9, new int[] { ToneGenerator.TONE_DTMF_9,KeyEvent.KEYCODE_9 });DIGITS_BTNS.put(R.id.buttonpound, new int[] {ToneGenerator.TONE_DTMF_P, KeyEvent.KEYCODE_POUND });DIGITS_BTNS.put(R.id.buttonstar, new int[] { ToneGenerator.TONE_DTMF_S,KeyEvent.KEYCODE_STAR });};/** * SparseArray这个是android提供的，可以替换HashMap,来提高效率 */private static final SparseArray<String> DIGITS_NAMES = new SparseArray<String>();static {DIGITS_NAMES.put(R.id.button0, "0");DIGITS_NAMES.put(R.id.button1, "1");DIGITS_NAMES.put(R.id.button2, "2");DIGITS_NAMES.put(R.id.button3, "3");DIGITS_NAMES.put(R.id.button4, "4");DIGITS_NAMES.put(R.id.button5, "5");DIGITS_NAMES.put(R.id.button6, "6");DIGITS_NAMES.put(R.id.button7, "7");DIGITS_NAMES.put(R.id.button8, "8");DIGITS_NAMES.put(R.id.button9, "9");DIGITS_NAMES.put(R.id.buttonpound, "pound");DIGITS_NAMES.put(R.id.buttonstar, "star");};public interface OnDialKeyListener {/** * Called when the user make an action *  * @param keyCode *            keyCode pressed * @param dialTone *            corresponding dialtone */void onTrigger(int keyCode, int dialTone);}@Overrideprotected void onFinishInflate() {super.onFinishInflate();for (int buttonId : DIGITS_BTNS.keySet()) {ImageButton button = (ImageButton) findViewById(buttonId);if (button != null) {button.setOnClickListener(this);}}}/** * Registers a callback to be invoked when the user triggers an event. *  * @param listener *            the OnTriggerListener to attach to this view */public void setOnDialKeyListener(OnDialKeyListener listener) {onDialKeyListener = listener;}private void dispatchDialKeyEvent(int buttonId) {if (onDialKeyListener != null && DIGITS_BTNS.containsKey(buttonId)) {int[] datas = DIGITS_BTNS.get(buttonId);onDialKeyListener.onTrigger(datas[1], datas[0]);}}@Overridepublic void onClick(View v) {dispatchDialKeyEvent(v.getId());}}


我们看看上面的代码：
1、initLayout来解析布局之后
2、onFinishInflate来设置按钮的点击事件
3、onClick处理点击事件，通过dispatchDialKeyEvent来实现分发事件
4、dispatchDialKeyEvent来根据不同的id，来设置回调onDialKeyListener.onTrigger，所以在实现Dialpad后，要实现OnDialKeyListener接口