Question

目前我面临三个问题：

让MediaRecorder重置而不是发布。我想我需要创建一个MediaRecorder的新实例并发布它（）它，但我不知道在哪里。
我希望它能够继续录制音频，直到手机消失，即使用户改变到不同的屏幕（即转到新课程）。我试图谷歌这个，但不知道如何实现它。

编辑 - 我想出了如何使用SimpleDateFormat！编辑2 - 已实现我需要为第二期创建一个已启动的服务。

我的代码如下

类别：

import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.TextView;



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


public class Drugs extends AppCompatActivity {


    WebView myBrowser;
    MediaRecorder mRecorder;
    private static String audioFilePath;
    public boolean isRecording = false;
    MediaPlayer mediaPlayer;
    public boolean isPlaying = false;
    SimpleDateFormat simpledate;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_drugs);



        myBrowser = (WebView) findViewById(R.id.mybrowser);
        myBrowser.loadUrl("file:///android_asset/drugs.html");
        myBrowser.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);

        Button btndrugslaw = (Button) findViewById(R.id.drugslaw);




        btndrugslaw.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                Intent intentdruglaw = new Intent(Drugs.this, DrugLaw.class);
                startActivity(intentdruglaw);
            }
        });}


    public void RecordButton (View view) {
        if(mRecorder == null){
            audioFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + simpledate 
                    + "/myaudio.3gp";
            mRecorder = new MediaRecorder();
            mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
            mRecorder.setOutputFile(audioFilePath);
            mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        }
        if (isRecording) {
            try{
                stopRecording();
                isRecording = false;
                ((Button)view).setText("Start Recording");
            }catch(Exception e){
                e.printStackTrace();
            }
        } else {
            try{
                startRecording();
                isRecording = true;
                ((Button)view).setText("Stop Recording");
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }

    public void startRecording() throws IllegalStateException, IOException{
        mRecorder.prepare();
        MediaRecorder mRecorder = new MediaRecorder();
        mRecorder.start();
    }

    public void stopRecording() throws IllegalStateException, IOException{
        mRecorder.stop();
        mRecorder.reset();
    }

    public void StartPlaying(View view) throws IllegalStateException, IOException {
        if (mediaPlayer == null) {
            mediaPlayer = new MediaPlayer();
            mediaPlayer.setDataSource(audioFilePath);
        }
        if (isPlaying) {
            try {
                stopPlaying();
                isPlaying = false;
                ((Button)view).setText("Play Audio");
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            try{
                startPlaying();
                isPlaying = true;
                ((Button)view).setText("Stop Audio");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }


    public void startPlaying() throws IllegalStateException, IOException {
        mediaPlayer.prepare();
        mediaPlayer.start();
    }

    public void stopPlaying () throws IllegalStateException, IOException {
        mediaPlayer.release();
    }

}

尝试让MediaRecorder重置，并在我更改为其他类时继续运行

0 个答案: