Android 來去電自動錄音 (二)

 二、介紹完了來電自動錄音，下面就來介紹去電自動錄音的實現方法。上面說過，相比來電狀態的監聽，去電的要麻煩些，甚至這種方法不是通用的，這個主要是由於android api 中沒有提供去電狀態監聽的相應類和方法（也許我剛接觸，沒有找到）。剛開始網上搜索了一通也沒有找到對應的解決方法，大可能是 來電監聽的，也就是上面的方法。不過中途發現一篇博文（後來就搜不到了），記得是查詢系統日誌的方式，從中找到去電過程當中的各個狀態的關鍵詞。無奈之中，最終妥協了此方法。

個人（聯想A65上的）去電日誌內容以下

過濾關鍵詞爲 mforeground

01-06 16:29:54.225: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.245: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.631: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.645: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.742: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.766: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.873: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.877: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:55.108: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:55.125: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:57.030: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:57.155: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:57.480: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:57.598: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:59.319: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DISCONNECTING
01-06 16:29:59.373: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DISCONNECTING
01-06 16:30:00.392: D/InCallScreen(251): - onDisconnect: currentlyIdle:true ; mForegroundCall.getState():DISCONNECTED
01-06 16:30:00.399: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): - onDisconnect: currentlyIdle:true ; mForegroundCall.getState():DISCONNECTED
01-06 16:30:01.042: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : IDLE
01-06 16:30:01.070: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : IDLE
01-06 16:30:01.558: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : IDLE
01-06 16:30:01.572: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : IDLE

 

過濾關鍵詞  mbackground
 

01-06 16:29:54.226: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.256: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.638: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.652: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.743: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.770: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.875: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.882: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:55.109: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:55.142: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.031: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.160: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.481: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.622: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:59.319: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:59.373: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.042: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.070: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.559: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.573: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE

從上面的日誌能夠看到，每一行的末尾的大寫英文詞就是去電的狀態，狀態說明以下：
DIALING 撥號，對方還未響鈴
ACTIVE   對方接通，通話創建
DISCONNECTING 通話斷開時
DISCONNECTED  通話已斷開，能夠認爲是掛機了
因爲我撥打的是10010,沒有響鈴過程（電腦自動接通的夠快），還少了一個狀態，狀態是ALERTING  這個就是對方正在響鈴的狀態
有了這幾個去電狀態就好辦了，如今咱們要作的就是讀取系統日誌，而後找到這些狀態，提取的關鍵詞就是上面提到的 mforeground（前臺通話狀態） 和 mbackground （後臺通話狀態）（可能不同的設備生成的不同，根據本身具體設備設置，這裏只提取前臺的），若是讀取的這一行日誌中 包含 mforground ，再看看是否包含上面的狀態的 單詞。既然說的如此，那麼看看讀取系統日誌的代碼吧
 

package com.sdvdxl.phonerecorder;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.sdvdxl.outgoingcall.OutgoingCallState;

import android.content.Context;
import android.content.Intent;
import android.util.Log;

/**
 *
 * @author sdvdxl
 *  找到 日誌中的
 *  onPhoneStateChanged: mForegroundCall.getState() 這個是前臺呼叫狀態
 *  mBackgroundCall.getState() 後臺電話
 *  若 是 DIALING 則是正在撥號，等待創建鏈接，但對方尚未響鈴，
 *  ALERTING 呼叫成功，即對方正在響鈴，
 *  如果 ACTIVE 則已經接通
 *  如果 DISCONNECTED 則本號碼呼叫已經掛斷
 *  如果 IDLE 則是處於 空閒狀態
 *
 */
public class ReadLog extends Thread {
    private Context ctx;
    private int logCount;

    private static final String TAG = "LogInfo OutGoing Call";

    /**
     *  先後臺電話
     * @author sdvdxl
     *
     */
    private static class CallViewState {
        public static final String FORE_GROUND_CALL_STATE = "mForeground";
    }

    /**
     * 呼叫狀態
     * @author sdvdxl
     *
     */
    private static class CallState {
        public static final String DIALING = "DIALING";
        public static final String ALERTING = "ALERTING";
        public static final String ACTIVE = "ACTIVE";
        public static final String IDLE = "IDLE";
        public static final String DISCONNECTED = "DISCONNECTED";
    }

    public ReadLog(Context ctx) {
        this.ctx = ctx;
    }

    /**
     * 讀取Log流
     * 取得呼出狀態的log
     * 從而獲得轉換狀態
     */
    @Override
    public void run() {
        Log.d(TAG, "開始讀取日誌記錄");

        String[] catchParams = {"logcat", "InCallScreen *:s"};
        String[] clearParams = {"logcat", "-c"};

        try {
            Process process=Runtime.getRuntime().exec(catchParams);
            InputStream is = process.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));

            String line = null;
            while ((line=reader.readLine())!=null) {
                logCount++;
                //輸出全部
            Log.v(TAG, line);

                //日誌超過512條就清理
                if (logCount>512) {
                    //清理日誌
                    Runtime.getRuntime().exec(clearParams)
                        .destroy();//銷燬進程，釋放資源
                    logCount = 0;
                    Log.v(TAG, "-----------清理日誌---------------");
                }

                /*---------------------------------前臺呼叫-----------------------*/
                //空閒
                if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
                        && line.contains(ReadLog.CallState.IDLE)) {
                    Log.d(TAG, ReadLog.CallState.IDLE);
                }

                //正在撥號，等待創建鏈接，即已撥號，但對方尚未響鈴，
                if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
                        && line.contains(ReadLog.CallState.DIALING)) {
                    Log.d(TAG, ReadLog.CallState.DIALING);
                }

                //呼叫對方 正在響鈴
                if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
                        && line.contains(ReadLog.CallState.ALERTING)) {
                    Log.d(TAG, ReadLog.CallState.ALERTING);
                }

                //已接通，通話創建
                if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
                        && line.contains(ReadLog.CallState.ACTIVE)) {
                    Log.d(TAG, ReadLog.CallState.ACTIVE);
                }

                //斷開鏈接，即掛機
                if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
                        && line.contains(ReadLog.CallState.DISCONNECTED)) {
                    Log.d(TAG, ReadLog.CallState.DISCONNECTED);
                }

            } //END while

        } catch (IOException e) {
            e.printStackTrace();
        } //END try-catch
    } //END run
} //END class ReadLog

         以上代碼中，之因此用線程，是爲了防止讀取日誌過程當中阻滯主方法的其餘方法的執行，影響到程序捕捉對應的電話狀態。
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另附 工程源代碼