Question

我正在制作和记录电话的应用程序。这是我的代码，用于记录呼叫并将文件保存在歌曲文件夹下的SD卡中。但问题是这段代码工作正常，但后来它无法正常工作。我找不到问题所在。你能帮帮我吗？

My Broad cast接收器：

public class BrCallReceive extends BroadcastReceiver {

      @Override
    public void onReceive(Context c, Intent i) {

        Bundle extras = i.getExtras();
        Intent x = new Intent (c, EavesDropperActivity.class);
        x.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        if (extras != null) {
            String state = extras.getString(TelephonyManager.EXTRA_STATE);
            Log.w("DEBUG", state);
            if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {
                Log.w("DEBUG", "MATCHES");
                Toast.makeText(c, "Launching record APP !", Toast.LENGTH_LONG).show();
                c.startActivity(x);
            }
        }
    }
}

我的录制活动：

public class EavesDropperActivity extends Activity {

    /** Called when the activity is first created. */
    MediaRecorder m_recorder = new MediaRecorder();
    TelephonyManager t_manager ;
    PhoneStateListener p_listener ;
    String record_state;
    Uri file;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.main);
        Toast.makeText(getBaseContext(),
                "Executing Activity",
                Toast.LENGTH_LONG).show();

        t_manager = (TelephonyManager) getSystemService (Context.TELEPHONY_SERVICE);
        p_listener = new PhoneStateListener() {
            @Override
            public void onCallStateChanged (int state, String incomingNumber) {
                switch (state) {
                    case (TelephonyManager.CALL_STATE_IDLE)     :
                        stop_recorder();

                        //t_manager.listen(p_listener, PhoneStateListener.LISTEN_NONE);
                        //finish();
                        break;

                    case (TelephonyManager.CALL_STATE_OFFHOOK)     :

                        start_recorder();

                        break;
                    case (TelephonyManager.CALL_STATE_RINGING)     :

                        break;

                }
            }
        };
        t_manager.listen(p_listener, PhoneStateListener.LISTEN_CALL_STATE);
        return;
    }

    public void start_recorder () {
        m_recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        m_recorder.setOutputFormat(OutputFormat.THREE_GPP);
        m_recorder.setOutputFile(Environment.getExternalStorageDirectory()+"/songs/audionew.3gpp");
        m_recorder.setAudioEncoder(AudioEncoder.AMR_NB);

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

    public void stop_recorder () {
        m_recorder.stop();
        m_recorder.release();
        Uri file = Uri.fromFile(
                new File(Environment.getExternalStorageDirectory(),"/songs/audionew.3gpp"));
        Toast.makeText(getBaseContext(),
                "record stored at " + file.toString(),
                Toast.LENGTH_LONG).show();

        t_manager.listen(p_listener, PhoneStateListener.LISTEN_NONE);
        finish();
    }
}

我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.testapp"
android:versionCode="1"
android:versionName="1.0" >

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

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.testapp.EavesDropperActivity"
            android:label="@string/app_name" >
    </activity>

    <receiver android:name="BrCallReceive" >
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" >
                </action>
            </intent-filter>
        </receiver>
    </application>

</manifest>

Answer 1

我认为我正在拨打手机时，广播接收器没有被激活。

你怎么知道你的广播接收器不工作？在开头的onReceive（）内放置一条Log消息。可能是您的extras == null

但是现在如何使我的接收器正常工作？

结帐example #5，然后按照相同的步骤操作。

我不认为活动会推出。

嗯，确实如此：你在onReceive（）中启动它：

Intent x = new Intent (c, EavesDropperActivity.class);
c.startActivity(x);

但是，您没有在“活动”中设置任何内容，即没有显示用户界面屏幕，因为您在onCreate() EavesDropperActivity活动中对此行进行了评论：

//setContentView(R.layout.main);

所以，你需要在EavesDropperActivity

中仔细思考你想要达到的目标

HTH。

Answer 2

把这个

  <android:permission="android.permission.RECEIVE_BOOT_COMPLETED" >
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>


<action android:name="android.intent.action.QUICKBOOT_POWERON" />

在广播接收器的清单文件中。

Answer 3

将您的包名称添加到接收器类中，

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.testapp"
android:versionCode="1"
android:versionName="1.0" >

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

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.testapp.EavesDropperActivity"
            android:label="@string/app_name" >
    </activity>

    <receiver android:name="com.example.testapp.BrCallReceive" >
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" >
                </action>
            </intent-filter>
        </receiver>
    </application>

android中的通话录音代码

3 个答案: