我多次问过这个问题。但我没有找到解决方案。
我有一个广播接收器,我在其中记录呼叫。 recorder.start()抛出IllegalStateException。我在Manifest中授予了所有权限。我打电话给recorder.prepare()(它不会抛出任何异常。)
我错过了什么吗?
这是我的简化代码:
case TelephonyManager.CALL_STATE_OFFHOOK:
recordState = true;
MediaRecorder mRecorder = new MediaRecorder();
mRecorder
.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);
mRecorder
.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder
.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mRecorder.setOutputFile(filePath);
mRecorder.setOnErrorListener(new OnErrorListener() {
@Override
public void onError(MediaRecorder mr, int what,
int extra) {
}
});
mRecorder.setOnInfoListener(new OnInfoListener() {
@Override
public void onInfo(MediaRecorder mr, int what,
int extra) {
// TODO Auto-generated method stub
}
});
mRecorder.prepare();
mRecorder.start();
recorder = mRecorder;
case TelephonyManager.CALL_STATE_IDLE:
if (recorder != null && recordState) {
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
}
这是我的logcat:
07-21 14:23:08.807: E/MediaRecorder(4202): start failed: -38
07-21 14:23:08.807: W/System.err(4202): java.lang.IllegalStateException
07-21 14:23:08.807: W/System.err(4202): at android.media.MediaRecorder.start(Native Method)
07-21 14:23:08.807: W/System.err(4202): at com.labelle.calllogsmanagement.MyReceiver$MyPhoneStateListener.onCallStateChanged(MyReceiver.java:165)
07-21 14:23:08.807: W/System.err(4202): at android.telephony.PhoneStateListener$2.handleMessage(PhoneStateListener.java:393)
07-21 14:23:08.807: W/System.err(4202): at android.os.Handler.dispatchMessage(Handler.java:99)
07-21 14:23:08.807: W/System.err(4202): at android.os.Looper.loop(Looper.java:137)
07-21 14:23:08.807: W/System.err(4202): at android.app.ActivityThread.main(ActivityThread.java:4856)
07-21 14:23:08.807: W/System.err(4202): at java.lang.reflect.Method.invokeNative(Native Method)
07-21 14:23:08.807: W/System.err(4202): at java.lang.reflect.Method.invoke(Method.java:511)
07-21 14:23:08.817: W/System.err(4202): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
07-21 14:23:08.817: W/System.err(4202): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
07-21 14:23:08.817: W/System.err(4202): at dalvik.system.NativeStart.main(Native Method)
修改 在给定路径上创建一个空文件。
修改
现在我创建了一个带有两个按钮的虚拟应用程序,一个用于启动,另一个用于停止录制。这是代码并在调用start()时抛出相同的异常:
package com.example.recordtest;
import java.io.File;
import java.io.IOException;
import android.app.Activity;
import android.media.MediaRecorder;
import android.media.MediaRecorder.OnErrorListener;
import android.media.MediaRecorder.OnInfoListener;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
MediaRecorder mRecorder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn1 = (Button) findViewById(R.id.button1);
Button btn2 = (Button) findViewById(R.id.button2);
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
File file = new File(Environment.getExternalStorageDirectory(),
"1234.3gp");
mRecorder.setOutputFile(file.getAbsolutePath());
mRecorder.setOnErrorListener(new OnErrorListener() {
@Override
public void onError(MediaRecorder mr, int what, int extra) {
}
});
mRecorder.setOnInfoListener(new OnInfoListener() {
@Override
public void onInfo(MediaRecorder mr, int what, int extra) {
// TODO Auto-generated method stub
}
});
try {
mRecorder.prepare();
mRecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mRecorder.stop();
mRecorder.reset();
mRecorder.release();
}
});
}
}
答案 0 :(得分:1)
经过几个小时的磨头,我意识到了。这是一个设备问题。上面的代码在其他设备中运行正常。
我知道无法在所有设备中完成通话记录(制造商限制它)。但从来不知道它会引发IllegalStateException
。