我有两个按钮，一个用于开始录制，另一个用于停止录制。 我在录制声音和存储在SD卡中取得了成功：
现在我想要的是如果我在15秒之前按下停止按钮我应保持原样，但如果录制时间超过15秒它应该自动停止录制并将录制的文件存储在SD卡中：
录制声音的代码在这里：
**
public void startRecording(View view) throws IOException {
startButton.setEnabled(false);
stopButton.setEnabled(true);
File sampleDir = Environment.getExternalStorageDirectory();
try {
//audiofile = File.createTempFile("sound", ".aac", sampleDir);
audiofile = File.createTempFile("sound", ".m4a", sampleDir);
} catch (IOException e) {
Log.e(TAG, "sdcard access error");
return;
}
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
recorder.setOutputFile(audiofile.getAbsolutePath());
recorder.prepare();
recorder.start();
}
**
用于停止录制
public void stopRecording(View view) {
startButton.setEnabled(true);
stopButton.setEnabled(false);
recorder.stop();
recorder.release();
}
我该怎么办？
答案 0 :(得分：4)
基本上你需要为此实现TimeTask。
if (view.getId() == R.id.stop) {
new Timer().schedule(new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run()
{
mediaRecorder.stop();
mediaRecorder.reset();
mediaRecorder.release();
}
});
}
}, 15000); <-- Execute code after 15000 ms i.e after 15 Seconds.
}
答案 1 :(得分：0)
package com.kapil.admin.scrollapplication;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
public class AudioRecordTest extends AppCompatActivity {
private static final String LOG_TAG = "AudioRecordTest";
private static final int REQUEST_RECORD_AUDIO_PERMISSION = 200;
private static String mFileName = null;
private RecordButton mRecordButton = null;
private MediaRecorder mRecorder = null;
String file;
private MediaPlayer mPlayer = null;
int i=0;
boolean mRecord=true;
Timer timer;
// Requesting permission to RECORD_AUDIO
private boolean permissionToRecordAccepted = false;
private String [] permissions = {Manifest.permission.RECORD_AUDIO};
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case REQUEST_RECORD_AUDIO_PERMISSION:
permissionToRecordAccepted = grantResults[0] == PackageManager.PERMISSION_GRANTED;
break;
}
if (!permissionToRecordAccepted ) finish();
}
private void onRecord(boolean start,int i) {
if (start) {
startRecording(mFileName+"/audiorecordtest"+i+".3gp");
} else {
stopRecording();// stop recording
startRecording(mFileName+"/audiorecordtest"+i+".3gp");//imeadiatly start recording
}
}
private void startRecording(String file) {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setOutputFile(file);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mRecorder.prepare();
} catch (IOException e) {
Log.e(LOG_TAG, "prepare() failed");
}
mRecorder.start();
}
private void stopRecording() {
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
class RecordButton extends android.support.v7.widget.AppCompatButton {
boolean mStartRecording = true;
OnClickListener clicker = new OnClickListener() {
public void onClick(View v) {
if(!mRecord)
{
if(timer!=null)
{
timer.cancel();
stopRecording();
mRecord=true;
}
}
mRecord=false;
// start record,at every 10 seconds
timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
i++;
runOnUiThread(new Runnable() {
@Override
public void run() {
onRecord(mStartRecording,i);
mStartRecording = !mStartRecording; // setting false
}
});
}
},0,10000);
}
};
public RecordButton(Context ctx) {
super(ctx);
setText("Start recording");
setOnClickListener(clicker);
}
}
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
// Record to the external cache directory for visibility
mFileName = getExternalCacheDir().getAbsolutePath();
// mFileName += "/audiorecordtest"+i+".3gp";
ActivityCompat.requestPermissions(this, permissions, REQUEST_RECORD_AUDIO_PERMISSION);
LinearLayout ll = new LinearLayout(this);
mRecordButton = new RecordButton(this);
ll.addView(mRecordButton,
new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT,
0));
}
@Override
public void onStop() {
super.onStop();
if (mRecorder != null) {
mRecorder.release();
mRecorder = null;
}
if (mPlayer != null) {
mPlayer.release();
mPlayer = null;
}
}
}