无论手机处于睡眠模式还是运行其他应用程序，如何在后台运行服务？

Z时代
2024-01-10
分类：问答

我想在后台永远运行我的服务，但在某些时候我检查了Youtube和Internet上的每个解决方案后停止了，但我没有得到答案，我尝试了像在onStartCommand（）中使用START_STICKY或使用onTaskRemoved（）方法，但它没有工作。任何帮助，将不胜感激。无论手机处于睡眠模式还是运行其他应用程序，如何在后台运行服务？

这是我的TheService类代码。 `

` package apphub.secretapp;

import android.app.Service; 
import android.content.Intent; 
import android.media.MediaPlayer; 
import android.media.MediaRecorder; 
import android.os.Build; 
import android.os.Environment; 
import android.os.IBinder; 
import android.os.SystemClock; 
import android.widget.Toast; 
import java.io.File; 
import java.io.IOException; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import java.util.Locale; 
import java.util.Random; 
/** 
* Created by as on 12/24/2017. 
*/ 
public class TheService extends Service implements 
MediaRecorder.OnInfoListener { 
String AudioSavePathInDevice = null; 
MediaRecorder mediaRecorder ; 
Random random ; 
String RandomAudioFileName = "ABCDEFGHIJKLMNOP"; 
public static final int RequestPermissionCode = 1; 
MediaPlayer mediaPlayer ; 
private MediaRecorder mRecorder; 
private long mStartTime; 
//setting maximum file size to be recorded 
private long Audio_MAX_FILE_SIZE = 1000000;//1Mb 
private int[] amplitudes = new int[100]; 
private int i = 0; 
private File mOutputFile; 
@Override 
public void onCreate() { 
    super.onCreate(); 
} 
@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    super.onStartCommand(intent,flags,startId); 
    Toast.makeText(this, "Service Started", Toast.LENGTH_SHORT).show(); 
    return START_STICKY; 
} 
private void startRecording() { 
    mRecorder = new MediaRecorder(); 
    mRecorder.setOnInfoListener(this); 
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
    mRecorder.setMaxFileSize(Audio_MAX_FILE_SIZE); 
    mRecorder.setOutputFormat 
      (MediaRecorder.OutputFormat.MPEG_4); 
    Toast.makeText(this, "Recording started", Toast.LENGTH_SHORT).show(); 
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) 
    { 
     mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.HE_AAC); 
     mRecorder.setAudioEncodingBitRate(48000); 
    } else { 
     mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); 
     mRecorder.setAudioEncodingBitRate(64000); 
    } 
    mRecorder.setAudioSamplingRate(16000); 
    mOutputFile = getOutputFile(); 
    mOutputFile.getParentFile().mkdirs(); 
    mRecorder.setOutputFile(mOutputFile.getAbsolutePath()); 
    try { 
     mRecorder.prepare(); 
     mRecorder.start(); 
     mStartTime = SystemClock.elapsedRealtime(); 
    } catch (IOException e) { 
    } 
} 
protected void stopRecording(boolean saveFile) { 
    mRecorder.stop(); 
    mRecorder.release(); 
    mRecorder = null; 
    mStartTime = 0; 
    if (!saveFile && mOutputFile != null) { 
     mOutputFile.delete(); 
    } 
    // to stop the service by itself 
} 
private File getOutputFile() { 
    SimpleDateFormat dateFormat = new SimpleDateFormat 
      ("yyyyMMdd_HHmmssSSS", Locale.US); 
    return new File(Environment.getExternalStorageDirectory().getAbsolutePath().toString() 
      + "/Voice Recorder/RECORDING_" 
      + dateFormat.format(new Date()) 
      + ".m4a"); 
} 
@Override 
public IBinder onBind(Intent intent) { 
    return null; 
} 
@Override 
public void onTaskRemoved(Intent rootIntent) { 
    Intent i =new Intent(getApplicationContext(),this.getClass()); 
    i.setPackage(getPackageName()); 
    startService(i); 
    super.onTaskRemoved(rootIntent); 
} 
@Override 
public void onInfo(MediaRecorder mr, int what, int extra) { 
    if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED) { 
    getOutputFile(); 
     startRecording(); 
    } 
} 
@Override 
public void onStart(Intent intent, int startId) { 
    super.onStart(intent, startId); 
    startRecording(); 
} 
}