Android实现后台开启服务默默拍照功能

2023-09-11 17:34:05 64
本文实例为大家分享了Android后台开启服务默默拍照的具体代码，供大家参考，具体内容如下
最近项目原因，需要编写一后台运行的程序，在给定时间间隔下进行拍照，关键技术主要是：1、开启服务；2、在不不预览的情况下，进行拍照操作。3、使用AlarmManager进行定时操作。
资源清单如下：
服务代码如下：
packagecom.yang.service;

importjava.io.IOException;

importandroid.app.AlarmManager;
importandroid.app.Notification;
importandroid.app.NotificationManager;
importandroid.app.PendingIntent;
importandroid.app.Service;
importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.IntentFilter;
importandroid.hardware.Camera;
importandroid.os.Binder;
importandroid.os.IBinder;
importandroid.util.Log;
importandroid.view.SurfaceView;
importandroid.widget.Toast;

importcom.yang.handle.PhotoHandler;
importcom.yang.testservice.MainActivity;
importcom.yang.testservice.R;

publicclassLocalServiceextendsService{

privateAlarmManageram=null;
privateCameracamera;

privatefinalIBindermBinder=newLocalBinder();

privateNotificationManagermNM;

privateintNOTIFICATION=R.string.local_service_started;

/**
*Classforclientstoaccess.Becauseweknowthisservicealwaysrunsin
*thesameprocessasitsclients,wedon'tneedtodealwithIPC.
*/
publicclassLocalBinderextendsBinder{
publicLocalServicegetService(){
returnLocalService.this;
}

}

@Override
publicvoidonCreate(){
mNM=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
showNotification();
init();
}

privatevoidinit(){
am=(AlarmManager)getSystemService(ALARM_SERVICE);

camera=openFacingBackCamera();

//注册广播
IntentFilterfilter=newIntentFilter();
filter.addAction("com.vegetables_source.alarm");
registerReceiver(alarmReceiver,filter);

Intentintent=newIntent();
intent.setAction("com.vegetables_source.alarm");
PendingIntentpi=PendingIntent.getBroadcast(this,0,intent,0);

am.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),
1000*10,pi);//马上开始，每1分钟触发一次
}

@Override
publicintonStartCommand(Intentintent,intflags,intstartId){
Log.i("LocalService","Receivedstartid"+startId+":"+intent);

returnSTART_STICKY;
}

@Override
publicvoidonDestroy(){
mNM.cancel(NOTIFICATION);

cancelAlertManager();

if(camera!=null){
camera.release();
camera=null;
}

Toast.makeText(this,R.string.local_service_stopped,Toast.LENGTH_SHORT)
.show();
}

@Override
publicIBinderonBind(Intentintent){
returnmBinder;
}

/**
*Showanotificationwhilethisserviceisrunning.
*/
privatevoidshowNotification(){
CharSequencetext=getText(R.string.local_service_started);

Notificationnotification=newNotification(R.drawable.stat_running,
text,System.currentTimeMillis());

PendingIntentcontentIntent=PendingIntent.getActivity(this,0,
newIntent(this,MainActivity.class),0);

notification.setLatestEventInfo(this,
getText(R.string.local_service_label),text,contentIntent);

mNM.notify(NOTIFICATION,notification);
}

privatevoidcancelAlertManager(){
Intentintent=newIntent();
intent.setAction("com.vegetables_source.alarm");
PendingIntentpi=PendingIntent.getBroadcast(this,0,intent,0);
am.cancel(pi);

//注销广播
unregisterReceiver(alarmReceiver);
}

BroadcastReceiveralarmReceiver=newBroadcastReceiver(){

@Override
publicvoidonReceive(Contextcontext,Intentintent){
if("com.vegetables_source.alarm".equals(intent.getAction())){

if(camera!=null){
SurfaceViewdummy=newSurfaceView(getBaseContext());
try{
camera.setPreviewDisplay(dummy.getHolder());
}catch(IOExceptione){
e.printStackTrace();
}
camera.startPreview();

camera.takePicture(null,null,newPhotoHandler(
getApplicationContext()));
}

}

}
};

privateCameraopenFacingBackCamera(){
Cameracam=null;
Camera.CameraInfocameraInfo=newCamera.CameraInfo();
;
for(intcamIdx=0,cameraCount=Camera.getNumberOfCameras();camIdx
进行拍照存储的操作代码如下：


packagecom.yang.handle;

importjava.io.File;
importjava.io.FileOutputStream;
importjava.text.SimpleDateFormat;
importjava.util.Date;

importandroid.content.Context;
importandroid.hardware.Camera;
importandroid.hardware.Camera.PictureCallback;
importandroid.os.Environment;
importandroid.widget.Toast;

publicclassPhotoHandlerimplementsPictureCallback{

privatefinalContextcontext;

publicPhotoHandler(Contextcontext){
this.context=context;
}

@Override
publicvoidonPictureTaken(byte[]data,Cameracamera){

FilepictureFileDir=getDir();

if(!pictureFileDir.exists()&&!pictureFileDir.mkdirs()){

Toast.makeText(context,"Can'tcreatedirectorytosaveimage.",
Toast.LENGTH_LONG).show();
return;

}

SimpleDateFormatdateFormat=newSimpleDateFormat("yyyymmddhhmmss");
Stringdate=dateFormat.format(newDate());
StringphotoFile="Picture_"+date+".jpg";

Stringfilename=pictureFileDir.getPath()+File.separator+photoFile;

FilepictureFile=newFile(filename);
System.out.println("filenameis"+filename);

try{
FileOutputStreamfos=newFileOutputStream(pictureFile);
fos.write(data);
fos.close();
Toast.makeText(context,"NewImagesaved:"+photoFile,
Toast.LENGTH_LONG).show();
}catch(Exceptionerror){
Toast.makeText(context,"Imagecouldnotbesaved.",
Toast.LENGTH_LONG).show();
}
}

privateFilegetDir(){
FilesdDir=Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
returnnewFile(sdDir,"ServiceCamera");
}
}
项目代码如下：
Android后台开启服务默默拍照
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。
Android实现后台开启服务默默拍照功能

热门推荐

随机推荐
