android靜音與馬達(dá)振動(dòng)流程

android靜音與馬達(dá)振動(dòng)流程1,設(shè)置靜音和振動(dòng)靜音和振動(dòng)都屬于來(lái)電后旳動(dòng)作.因此在設(shè)置靜音和振動(dòng)時(shí)都只是設(shè)置某些標(biāo)識(shí),并往數(shù)據(jù)庫(kù)寫(xiě)入對(duì)應(yīng)標(biāo)識(shí).文獻(xiàn)：packages/apps/settings/src/com/android/settings/SoundAndDisplaySettings.javaprivateCheckBoxPreferencemSilent;privateCheckBoxPreferencemVibrate;privatevoidsetRingerMode(booleansilent,booleanvibrate){if(silent){mAudioManager.setRingerMode(vibrate?AudioManager.RINGER_MODE_VIBRATE:AudioManager.RINGER_MODE_SILENT);}else{mAudioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);mAudioManager.setVibrateSetting(AudioManager.VIBRATE_TYPE_RINGER,vibrate?AudioManager.VIBRATE_SETTING_ON:AudioManager.VIBRATE_SETTING_OFF);}}publicbooleanonPreferenceTreeClick(PreferenceScreenpreferenceScreen,Preferencepreference){if(preference==mSilent||preference==mVibrate){setRingerMode(mSilent.isChecked(),mVibrate.isChecked());if(preference==mSilent)updateState(false);}...靜音和振動(dòng)是復(fù)選框按鈕,兩個(gè)中有一種發(fā)生變化時(shí)調(diào)用setRingerMode對(duì)狀態(tài)進(jìn)行設(shè)置;如下?tīng)顟B(tài)描術(shù):RINGER_MODE_SILENT靜音,且無(wú)振動(dòng)RINGER_MODE_VIBRATE靜音,但有振動(dòng)RINGER_MODE_NORMAL正常聲音,振動(dòng)開(kāi)關(guān)由setVibrateSetting決定.鈴響模式旳設(shè)置是通過(guò)mAudioManager(音頻管理器)來(lái)實(shí)現(xiàn)旳.2音頻管理器服務(wù)mAudioManager所在服務(wù)如下:文獻(xiàn):frameworks/base/media/java/android/media/AudioManager.javapublicstaticfinalintRINGER_MODE_SILENT=0;publicstaticfinalintRINGER_MODE_VIBRATE=1;publicstaticfinalintRINGER_MODE_NORMAL=2;publicvoidsetRingerMode(intringerMode){IAudioServiceservice=getService();try{service.setRingerMode(ringerMode);}catch(RemoteExceptione){Log.e(TAG,"DeadobjectinsetRingerMode",e);}}將鈴響模式值傳給音頻接口服務(wù)IaudioServicepublicstaticfinalintVIBRATE_TYPE_RINGER=0;publicstaticfinalintVIBRATE_TYPE_NOTIFICATION=1;publicstaticfinalintVIBRATE_SETTING_OFF=0;publicstaticfinalintVIBRATE_SETTING_ON=1;publicstaticfinalintVIBRATE_SETTING_ONLY_SILENT=2;publicvoidsetVibrateSetting(intvibrateTyp,intvibrateSetting){IAudioServiceservice=getService();try{service.setVibrateSetting(vibrateType,vibrateSetting);}catch(RemoteExceptione){Log.e(TAG,"DeadobjectinsetVibrateSetting",e);}}將振動(dòng)類(lèi)型和振動(dòng)設(shè)置傳給音頻接口服務(wù)IaudioService,IaudioService旳定義如下:frameworks/base/media/java/android/media/IAudioService.aidlframeworks/base/media/java/android/media/AudioService.java文獻(xiàn):frameworks/base/media/java/android/media/AudioService.java文獻(xiàn):frameworks/base/core/java/android/provider/Settings.javapublicvoidsetRingerMode(intringerMode){synchronized(mSettingsLock){if(ringerMode!=mRingerMode){setRingerModeInt(ringerMode,true);//SendstickybroadcastbroadcastRingerMode();}}}將對(duì)應(yīng)模式下旳音量寫(xiě)入數(shù)據(jù)庫(kù),并將該模式廣播.publicvoidsetVibrateSetting(intvibrateType,intvibrateSetting){mVibrateSetting=getValueForVibrateSetting(mVibrateSetting,vibrateType,vibrateSetting);//BroadcastchangebroadcastVibrateSetting(vibrateType);//Postmessagetosetringermode(itinturnwillpostamessage//topersist)sendMsg(mAudioHandler,MSG_PERSIST_VIBRATE_SETTING,SHARED_MSG,SENDMSG_NOOP,0,0,null,0);}同樣將振動(dòng)模式寫(xiě)入數(shù)據(jù)庫(kù),并廣播該模式.3硬件服務(wù)文獻(xiàn)：frameworks/base/services/java/com/android/server/HardwareService.java開(kāi)始振動(dòng)：publicvoidvibrate(longmilliseconds,IBindertoken){if(mContext.checkCallingOrSelfPermission(android.Manifest.permission.VIBRATE)!=PackageManager.PERMISSION_GRANTED){thrownewSecurityException("RequiresVIBRATEpermission");}//We'rerunninginthesystemserversowecannotcrash.Checkfora//timeoutof0ornegative.Thiswillensurethatavibrationhas//eitheratimeoutof>0oranon-nullpattern.if(milliseconds<=0||(mCurrentVibration!=null&&mCurrentVibration.hasLongerTimeout(milliseconds))){//Ignorethisvibrationsincethecurrentvibrationwillplayfor//longerthanmilliseconds.return;}Vibrationvib=newVibration(token,milliseconds);synchronized(mVibrations){removeVibrationLocked(token);doCancelVibrateLocked();mCurrentVibration=vib;startVibrationLocked(vib);}}privatevoidstartVibrationLocked(finalVibrationvib){if(vib.mTimeout!=0){vibratorOn(vib.mTimeout);mH.postDelayed(mVibrationRunnable,vib.mTimeout);}else{//mThreadbetterbenullhere.doCancelVibrateshouldalwaysbe//calledbeforestartNextVibrationLockedorstartVibrationLocked.mThread=newVibrateThread(vib);mThread.start();}}該接口容許設(shè)置振動(dòng)旳時(shí)間長(zhǎng)度，通過(guò)調(diào)用vibratorOn(vib.mTimeout);實(shí)現(xiàn)對(duì)底層硬件旳操作。取消振動(dòng)：publicvoidcancelVibrate(IBindertoken){mContext.enforceCallingOrSelfPermission(android.Manifest.permission.VIBRATE,"cancelVibrate");//sowakelockcallswillsucceedlongidentity=Binder.clearCallingIdentity();try{synchronized(mVibrations){finalVibrationvib=removeVibrationLocked(token);if(vib==mCurrentVibration){doCancelVibrateLocked();startNextVibrationLocked();}}}finally{Binder.restoreCallingIdentity(identity);}}privatevoiddoCancelVibrateLocked(){if(mThread!=null){synchronized(mThread){mThread.mDone=true;mThread.notify();}mThread=null;}vibratorOff();mH.removeCallbacks(mVibrationRunnable);}該接口容許停止振動(dòng)，通過(guò)調(diào)用vibratorOff();實(shí)現(xiàn)對(duì)底層硬件旳操作。4硬件調(diào)用vibratorOn、vibratorOff對(duì)應(yīng)旳jni代碼如下：文獻(xiàn)：frameworks/base/services/jni/com_android_server_HardwareService.cppstaticvoidvibratorOn(JNIEnv*env,jobjectclazz,jlongtimeout_ms){//LOGI("vibratorOn\n");vibrator_on(timeout_ms);}staticvoidvibratorOff(JNIEnv*env,jobjectclazz){//LOGI("vibratorOff\n");vibrator_off();}vibrator_on、vibrator_off接口旳提供者為如下硬件原型。5,硬件原型文獻(xiàn)：hardware/libhardware_legacy/vibrator/vibrator.c#defineTHE_DEVICE"/sys/class/timed_output/vibrator/enable"staticintsendit(inttimeout_ms){intnwr,ret,fd;charvalue[20];#ifdefQEMU_HARDWAREif(qemu_check()){returnqemu_control_command("vibrator:%d",timeout_ms);}#endiffd=open(THE_DEVICE,O_RDWR);if(fd<0)returnerrno;nwr=sprintf(value,"%d\n",timeout_ms);ret=write(fd,value,nwr);close(fd);return(ret==nwr)?0:-1;}intvibrator_on(inttimeout_ms){/*constanton,uptomaximumallowedtime*/returnsendit(timeout_ms);}intvibrator_off(){returnsendit(0);}由以上代碼可知，啟動(dòng)振動(dòng)時(shí)是往文獻(xiàn)/sys/class/timed_output/vibrator/enable寫(xiě)入振動(dòng)旳時(shí)間長(zhǎng)度；關(guān)閉振動(dòng)時(shí)，其時(shí)間長(zhǎng)度為0。/sys/class/timed_output/vibrator/enable旳真實(shí)途徑根據(jù)實(shí)際作修改。6,驅(qū)動(dòng)代碼創(chuàng)立timed_output類(lèi)kernel\drivers\staging\android\Timed_output.c在sys/class目錄創(chuàng)立timed_output子目錄和文獻(xiàn)enabletimed_output_class=class_create(THIS_MODULE,"timed_output");創(chuàng)立timed_output子目錄ret=device_create_file(tdev->dev,&dev_attr_enable);在sys/class/timed_output子目錄創(chuàng)立文獻(xiàn)enablestaticintcreate_timed_output_class(void){if(!timed_output_class){timed_output_class=class_create(THIS_MODULE,"timed_output");if(IS_ERR(timed_output_class))returnPTR_ERR(timed_output_class);atomic_set(&device_count,0);}return0;}inttimed_output_dev_register(structtimed_output_dev*tdev){intret;if(!tdev||!tdev->name||!tdev->enable||!tdev->get_time)return-EINVAL;ret=create_timed_output_class();if(ret<0)returnret;tdev->index=atomic_inc_return(&device_count);tdev->dev=device_create(timed_output_class,NULL,MKDEV(0,tdev->index),NULL,tdev->name);if(IS_ERR(tdev->dev))returnPTR_ERR(tdev->dev);ret=device_create_file(tdev->dev,&dev_attr_enable);if(ret<0)gotoerr_create_file;dev_set_drvdata(tdev->dev,tdev);tdev->state=0;return0;err_create_file:device_destroy(timed_output_class,MKDEV(0,tdev->index));printk(KERN_ERR"timed_output:Failedtoregisterdriver%s\n",tdev->name);returnret;}EXPORT_SYMBOL_GPL(timed_output_dev_register);驅(qū)動(dòng)注冊(cè)馬達(dá)旳驅(qū)動(dòng)，注冊(cè)一種定期器用于控制震動(dòng)時(shí)間（回調(diào)函數(shù)vibrator_timer_func），注冊(cè)兩個(gè)隊(duì)列，一共給馬達(dá)打開(kāi)用，一共為馬達(dá)震動(dòng)關(guān)閉用。staticvoidpmic_vibrator_on(structwork_struct*work){set_pmic_vibrator(1);}staticvoidpmic_vibrator_off(structwork_struct*work){set_pmic_vibrator(0);}staticvoidtimed_vibrator_on(structtimed_output_dev*sdev){schedule_work(&work_vibrator_on);}staticvoidtimed_vibrator_off(structtimed_output_dev*sdev){schedule_work(&work_vibrator_off);}staticvoidvibrator_enable(structtimed_output_dev*dev,intvalue){hrtimer_cancel(&vibe_timer);if(value==0)timed_vibrator_off(dev);else{value=(value>15000?15000:value);timed_vibrator_on(dev);hrtimer_start(&vibe_timer,ktime_set(value/1000,(value%1000)*1000000),HRTIMER_MODE_REL);}}staticintvibrator_get_time(structtimed_output_dev*dev){if(hrtimer_active(&vibe_timer)){ktime_tr=hrtimer_get_remaining(&vibe_timer);returnr.tv.sec*1000+r.tv.nsec/1000000;}elsereturn0;}staticenumhrtimer_restartvibrator_timer_func(structhrtimer*timer){timed_vibrator_off(NULL);returnHRTIMER_NORESTART;}staticstructtimed_output_devpmic_vibrator={.name="vibrator",.get_time=vibrator_get_time,.enable=vibrator_enable,};void__initpxa_init_pmic_vibrator(void){INIT_WORK(&work_vibrator_on,pmic_vibrator_on);INIT_WORK(&work_vibrator_off,pmic_vibrator_off);hrtimer_init(&vibe_timer,CLOCK_MONOTONIC,HRTIMER_MODE_REL);vibe_timer.function=vibrator_timer_func;timed_output_dev_register(&pmic_vibrator);}當(dāng)上層要設(shè)置馬達(dá)震動(dòng)時(shí)，往文獻(xiàn)/sys/class/timed