在我的应用程序中，我需要记录每个来电和去电

Question

下面是接收器类的代码

package com.example.crecording;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.IInterface;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.widget.Toast;
public class callReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
          phoneListener phonestateListener = new phoneListener(context);
          TelephonyManager telephony = (TelephonyManager) context .getSystemService(Context.TELEPHONY_SERVICE);
          telephony.listen(phonestateListener, PhoneStateListener.LISTEN_CALL_STATE);
    }
    class phoneListener extends PhoneStateListener{
        private Context context;
        phoneListener(Context c){
            super();
            context=c;
        }
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
             SharedPreferences preferences =     context.getSharedPreferences("CallReceiver", Context.MODE_PRIVATE);
            switch (state) {
            case TelephonyManager.CALL_STATE_IDLE :
                Toast.makeText(context, state+"",Toast.LENGTH_SHORT).show();
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                     String phone_number = preferences.getString("phone_number",null);
                     Intent serv = new Intent(context,
                     cRecordingservice.class);
                     serv.putExtra("number", phone_number);
                     context.startService(serv);
                     Toast.makeText(context, state+"",Toast.LENGTH_SHORT).show();   
                     break;
            case TelephonyManager.CALL_STATE_RINGING :
                   SharedPreferences.Editor editor = preferences.edit();
                   editor.putString("phone_number", incomingNumber);
                   editor.commit();
                   Toast.makeText(context, state+""+incomingNumber,Toast.LENGTH_LONG).show();
                break;
            }
        }   
    }
}

以下是通话录音服务的代码

    package com.example.crecording;
import java.io.File;
import java.io.IOException;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.MediaRecorder;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.widget.Toast;
public class cRecordingservice extends Service  {
    MediaRecorder callrecorder;
    Boolean recording;
    MainActivity main=new MainActivity();
    BroadcastReceiver myreceiver=new BroadcastReceiver(){
        @Override
        public void onReceive(Context context, Intent intent) {
        myphonestatelistener mpl=new myphonestatelistener(context);
        TelephonyManager tm=(TelephonyManager)context.getSystemService(TELEPHONY_SERVICE);
        tm.listen(mpl,PhoneStateListener.LISTEN_CALL_STATE);
        }
        class myphonestatelistener extends PhoneStateListener{
            private Context context;
            myphonestatelistener(Context c){
                context=c;
            }
            @Override
            public void onCallStateChanged(int state, String incomingNumber) {
                // TODO Auto-generated method stub
                super.onCallStateChanged(state, incomingNumber);
                switch (state) {
                case TelephonyManager.CALL_STATE_IDLE:
                    if(recording){
                        stopRecording();
                        Toast.makeText(context, "stopped", Toast.LENGTH_SHORT).show();
                    }
                    break;
                case TelephonyManager.CALL_STATE_OFFHOOK:
                    if(!recording){
                    startRecording();
                    Toast.makeText(context, "started", Toast.LENGTH_SHORT).show();
                    }
                    break;
                case TelephonyManager.CALL_STATE_RINGING:
                    break;

                }
            }

        }
            };

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
         Toast.makeText(getApplicationContext(), "Service Created", Toast.LENGTH_LONG).show();
         IntentFilter RecFilter = new IntentFilter();
         RecFilter.addAction("android.intent.action.PHONE_STATE");
         RecFilter.addAction("android.intent.action.NEW_OUTGOING_CALL");
         registerReceiver(myreceiver, RecFilter);
    }
    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        unregisterReceiver(myreceiver);
        Toast.makeText(getApplicationContext(), "Service destroyed", Toast.LENGTH_LONG).show();
    }
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub
//      startRecording();
        return  START_STICKY;

    }

    void startRecording(){
        String root="/sdcard/";
        String fname="rec"+System.currentTimeMillis()+".amr";
        File file=new File(root,fname);
        callrecorder=new MediaRecorder();
        callrecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);
        callrecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
        callrecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        callrecorder.setOutputFile(file.getAbsolutePath()
                );
        try {
            callrecorder.prepare();
            callrecorder.start();
            recording=true;
//          Toast.makeText(getApplicationContext(), "Started", Toast.LENGTH_SHORT).show();  
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
//          Toast.makeText(getApplicationContext(),e.printStackTrace(),3000 ).show();
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

void stopRecording(){
        callrecorder.stop();
//      callrecorder.release();
        callrecorder.reset();
        recording=false;
    }


}

主要活动.java

public class MainActivity extends Activity {
    Intent intent2;
    static MediaRecorder callrecorder;
    static Boolean recording=false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btnStart=(Button)findViewById(R.id.button1);
        Button btnStop=(Button)findViewById(R.id.button2);
        btnStart.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "Start Service", 10000).show();
                intent2 = new Intent(getApplicationContext(), cRecordingservice.class);
//                getApplicationContext().startService(intent2);    
            }
        });
        btnStop.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "Stop Service", 10000).show();
                intent2 = new Intent(getApplicationContext(), cRecordingservice.class);
                getApplicationContext().stopService(intent2);
            }
        });
    }
}

下面是清单代码

<uses-sdk
    android:minSdkVersion="9"
    android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.CALL_PHONE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.crecording.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <receiver android:name="com.example.crecording.callReceiver" >
        <intent-filter >
            <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
            <action android:name="android.intent.action.PHONE_STATE"/>
        </intent-filter>
    </receiver>
    <service android:name="com.example.crecording.cRecordingservice" ></service>
</application>

更改后，应用程序能够记录一个呼叫，但之后它会制作无法识别格式的文件并将文件附加到当前文件。我不知道为什么会这样

Answer 1

看起来

您在电话状态更改时启动录音服务（例如，从"空闲"更改为"摘机"）。但是，在该服务中，您不会注册广播接收器以侦听电话状态更改，并且也不会开始录制，因此不会发生任何事情。

应将数据传递给服务，以告知其启动时电话状态更改，然后确保在启动时注册广播接收器。您还需要处理这样一个事实，即您现在有两个广播接收器侦听电话状态更改，并可能开始和停止录制。