android 去电监听录音（通过广播和服务）

通过广播，实现去电监听，通过服务实现录音。

开发工具：Android Studio 3.0.1

看代码：

broadcastReceiver.java

package com.example.test_6application;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class broadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        //throw new UnsupportedOperationException("Not yet implemented");


        if (intent.getAction().equals("android.intent.action.NEW_OUTGOING_CALL")) {
            String phoneNum = intent.getStringExtra( Intent.EXTRA_PHONE_NUMBER );
            Toast.makeText( context, "监听到拨打电话:" +phoneNum , Toast.LENGTH_SHORT ).show();
            //其他操作，如启动另一个Activiy：
            //Intent it = new Intent( context, ***Activity.class );
            //context.startActivity(it);

            Intent it = new Intent( context,recordService.class );
            context.startService(it); //启动录音服务

        }


    }
}

//先创建一个广播

再创建一个服务(recordService.java)

//使用MediaRecorder类实现录音

源码：

package com.example.test_6application;

import android.app.Service;
import android.content.Intent;
import android.media.MediaRecorder;
import android.os.IBinder;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class recordService extends Service {
    private File recordFile;

    // 录音类
    private MediaRecorder mediaRecorder;


    public recordService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }


    @Override
    public void onCreate() {
        super.onCreate();
    }


    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        SimpleDateFormat formatter  = new  SimpleDateFormat    ("yyyy年MM月dd日    HH:mm:ss     ");
        Date curDate  =  new  Date(System.currentTimeMillis());//获取当前时间
        String  str  = formatter.format(curDate);
        // recordFile = new File("/sdcard", "kk.amr");
        recordFile = new File("/sdcard/"+"_"+str+".3gp");

        mediaRecorder = new MediaRecorder();
        // 判断，若当前文件已存在，则删除
        if (recordFile.exists()) {
            recordFile.delete();
        }
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//设置音频输入源 ,麦克风
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); //设置音频输出格式   three_gpp
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);//设置音频编码方式   amr_nb
        mediaRecorder.setOutputFile(recordFile.getAbsolutePath());

        try {
            // 准备好开始录音
            mediaRecorder.prepare();

            mediaRecorder.start();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return super.onStartCommand(intent, flags, startId);
    }



    @Override
    public void onDestroy() {
        if (recordFile != null) {
            mediaRecorder.stop();
            mediaRecorder.release();
        }

        super.onDestroy();
    }
}

创建方法：

MainActivity.java

android 6.0以上要获取手机打电话、录音、存储权限，及以下代码的3个 if 条件语句

注意要引入 v4-27.1.1 包

package com.example.test_6application;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (ActivityCompat.checkSelfPermission(MainActivity.this,
                Manifest.permission.PROCESS_OUTGOING_CALLS)
                != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{Manifest.permission.PROCESS_OUTGOING_CALLS}, 123);
            return;
        }


        if (ActivityCompat.checkSelfPermission( MainActivity.this,
                Manifest.permission.RECORD_AUDIO)
                != PackageManager.PERMISSION_GRANTED ) {
            ActivityCompat.requestPermissions( MainActivity.this,
                    new String[] { Manifest.permission.RECORD_AUDIO }, 12345);
            return;
        }

        if (ActivityCompat.checkSelfPermission( MainActivity.this,
                Manifest.permission.WRITE_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED ) {
            ActivityCompat.requestPermissions( MainActivity.this,
                    new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE }, 123456);
            return;
        }



        Button bt2=(Button) findViewById(R.id.button2);
        bt2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent it = new Intent(  MainActivity.this,recordService.class );
                stopService(it);
            }
        });
    }

}

activitymain.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/bg" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="80dp"
        android:orientation="horizontal">

        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="结束录音"
            android:textSize="24sp" />
    </LinearLayout>
</LinearLayout>

manifests.xml

添加权限：去电权限、写入sd卡权限等

添加广播监听权限：

<intent-filter>
                <action android:name="android.intent.action.ACTION_SHUTDOWN" />
                <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
            </intent-filter>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.test_6application">

    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <receiver
            android:name=".broadcastReceiver"
            android:enabled="true"
            android:exported="true" >

<!--注册广播-->
            <intent-filter>
                <action android:name="android.intent.action.ACTION_SHUTDOWN" />
                <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
            </intent-filter>
        </receiver>

        <service
            android:name=".recordService"
            android:enabled="true"
            android:exported="true"></service>
    </application>

</manifest>

本人使用android 6.0手机，能够正确运行录音