相关疑难解决方法(0)

在下面的代码中,我的audioRecord对象没有初始化.我尝试将其移动到该onCreate方法并使其成为全局的.我已记录状态,并返回一个值1,表示可以使用.调试器表示startRecording正在未初始化的对象上调用它.它还说它无法获得音频源.

为什么我会收到这些错误？

    package com.tecmark;

    import java.io.BufferedOutputStream;
    import java.io.DataOutputStream;
    import java.io.File;
    import java.io.FileOutputStream;
    import android.app.Activity;
    import android.media.AudioFormat;
    import android.media.AudioRecord;
    import android.media.MediaRecorder;
    import android.os.Bundle;
    import android.os.Environment;
    import android.util.Log;
    import android.view.View;
    import android.widget.TextView;

    public class recorder extends Activity  {

        private Thread thread;
        private boolean isRecording;
        private AudioRecord recorder;
        private FileOutputStream os;
        private BufferedOutputStream bos;
        private DataOutputStream dos;
        private TextView text;
        private int audioSource = MediaRecorder.AudioSource.MIC;
        private int sampleRate = 22050;
        private int channel = AudioFormat.CHANNEL_CONFIGURATION_MONO; …