android 开机向导OOBE源码分析

OOBE是开机向导，普通的理解就是一个界面跳另一个界面再跳下一个界面，OOBE却不是这么实现的。下面分析OOBE界面跳转实现：

打开OOBE目录，找到入口是WizardActivity.java,该Activity随后跳转到MainActivity.java。OOBE界面跳转逻辑都在MainActivity.java里实现。

对于一个陌生的Activity，我们先看它的onCreate方法：

@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Log.i("xsslog","OOBE MainActivity onCreate() ----------111");  this.getWindow().setFlags(FLAG_HOMEKEY_DISPATCHED, FLAG_HOMEKEY_DISPATCHED);//forbid homeKeymSimExist = isSimExist();Xlog.d(TAG, "onCreate mSimExist = " + mSimExist);if (savedInstanceState != null) {mCurrentStep = savedInstanceState.getInt("currentStep");mTotalStep = savedInstanceState.getInt("totalSteps");Log.i("xsslog", "restore saved instance state mCurrentStep=" + mCurrentStep + "mTotalStep="+ mTotalStep);setActivityList();}//Diable window rotate for phone.  setWindowRotation(false);//disable quick start guide for tablet//disableQSG();mIsFirstRun = Settings.System.getInt(getContentResolver(), Utils.OOBE_HAS_RUN_KEY, 0) == 0; Log.i("xsslog","OOBE MainActivity onCreate() -----222-----mIsFirstRun="+mIsFirstRun);  if (mIsFirstRun) {Settings.System.putInt(getContentResolver(),Settings.System.OOBE_DISPLAY, Settings.System.OOBE_DISPLAY_ON);Settings.Global.putInt(getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 0);enableStatusBar(false);}mBootMode = getBootMode();      if (mIsFirstRun && mBootMode != BOOT_MODE_ADV_META && !Utils.isWifiOnly(this)) {mHandler.sendEmptyMessageDelayed(EVENT_MONITOR_SIM_TIME_OUT, TIME_MONITOR_SIM);Log.i("xsslog","OOBE MainActivity ()=========");      //showDialog(DIALOG_WAITING_SIM);} else {mHandler.sendEmptyMessage(EVENT_SIM_DETECTING_READY);}mSIMIntentFilter = new IntentFilter(TelephonyIntents.ACTION_SIM_INFO_UPDATE);registerReceiver(mSIMStateReceiver, mSIMIntentFilter);pm = getPackageManager();name = new ComponentName(this, WizardActivity.class);if(pm != null)//added by lzpstate = pm.getComponentEnabledSetting(name);
/*    mVelocityTracker = VelocityTracker.obtain();mScreenOffReceiverFilter = new IntentFilter();mScreenOffReceiverFilter.addAction(Intent.ACTION_SCREEN_ON);registerReceiver(mScreenOffReceiver,mScreenOffReceiverFilter);*/      }

其中mCurrentStep是指当前界面数，mTotalStep是指OOBE总界面数。mIsFirstRun判断是否第一次进入OOBE，做相应处理

这里的重点是看setActivityList();

protected void setActivityList() {boolean mIphoneFlag = Settings.System.getInt(this.getContentResolver(), Settings.System.ISIPHONE, 0) == 1;//added by lzpboolean noIphoneChars = "1".equals(SystemProperties.get("ro.cenon_setting_no_iPhone"));//added by lzpboolean switchPagesByLogo = "1".equals(SystemProperties.get("cenon.switch_oobe_pages_by_logo"));//added by lzpXlog.d(TAG, "setActivityList() mIphoneFlag="+mIphoneFlag);mStepActivityies.clear();if((!switchPagesByLogo && !noIphoneChars) || mIphoneFlag) {mStepActivityies.add(mLanguageSettings);mStepActivityies.add(mCountrySettings);mStepActivityies.add(iMessageAndFaceTime);// add by csc for ios 10mStepActivityies.add(mInputMethodSettings);mStepActivityies.add(mWifiSettings); mStepActivityies.add(mfinishOobe);} else {//added by lzp mStepActivityies.add(mLanguageSettings);mStepActivityies.add(mCountrySettings);mStepActivityies.add(mInputMethodSettings);mStepActivityies.add(mfinishOobe);}mTotalStep = mStepActivityies.size();}

可以看到每个界面都被加到了mStepActivityies里面，mTotalStep就是在这里得出

private List<OobeActivityInfo> mStepActivityies = new ArrayList<OobeActivityInfo>();

我们发现里面有个mHandler处理，于是我们跳到该mHandler：

private Handler mHandler = new Handler() {@Overridepublic void handleMessage(android.os.Message msg) {switch (msg.what) {case EVENT_MONITOR_SIM_TIME_OUT:Xlog.v(TAG, "handler wait SIM time out");break;case EVENT_SIM_DETECTING_READY:Xlog.v(TAG, "handler SIM initialization finish");mHandler.removeMessages(EVENT_MONITOR_SIM_TIME_OUT);break;         case EVENT_PREPAREING_END_OOBE:mHandler.removeMessages(EVENT_PREPAREING_END_OOBE);finish();break;   default:break;}initStep();//removeDialog(DIALOG_WAITING_SIM);};};

可以看到有EVENT_MONITOR_SIM_TIME_OUT，EVENT_SIM_DETECTING_READY，EVENT_PREPAREING_END_OOBE等情况的处理，我们主要研究OOBE界面是如何进行跳转的，上面的就不细做分析了。然后就注意到initStep()方法

private void initStep() {       if (mIsStepInitiated) {return;}mIsStepInitiated = true;setActivityList();if (mCurrentStep == -1) {nextActivity(true);}}

setActivityList()上面说了把界面都放入list，重点看nextActivity方法

protected void nextActivity(boolean nextStep) {     if (nextStep) {if(mCurrentStep<0){mCurrentStep++;Intent lockScreenIntent = new Intent(ACTION_LOCK_SCREEN);startActivityForResult(lockScreenIntent, REQUEST_CODE_ADVANCED_SETTINGS);return;}else mCurrentStep++;} else {mCurrentStep--;}if (mCurrentStep >= 0 && mCurrentStep < mStepActivityies.size()) {Intent intent = mStepActivityies.get(mCurrentStep).getIntent();intent.putExtra(Utils.OOBE_BASIC_STEP_TOTAL, mTotalStep);intent.putExtra(Utils.OOBE_BASIC_STEP_INDEX, mCurrentStep + 1);intent.putExtra(EXTRA_IS_OOBE, true);startActivityForResult(intent, mCurrentStep);if (nextStep) {overridePendingTransition(R.anim.slide_right_in, R.anim.slide_left_out);//overridePendingTransition(R.anim.zoomin, R.anim.zoomout);} else {overridePendingTransition(R.anim.slide_left_in, R.anim.slide_right_out);//overridePendingTransition(R.anim.zoomin, R.anim.zoomout);}}}

nextStep用来判断下一步还是上一步，mCurrentStep是要跳转界面的值，知道这个前一部分代码就好理解了

Intent intent = mStepActivityies.get(mCurrentStep).getIntent();intent.putExtra(Utils.OOBE_BASIC_STEP_TOTAL, mTotalStep);intent.putExtra(Utils.OOBE_BASIC_STEP_INDEX, mCurrentStep + 1);intent.putExtra(EXTRA_IS_OOBE, true);startActivityForResult(intent, mCurrentStep);

根据mCurrentStep从mStepActivityies取出该界面的包名，用startActivityForResult方法进行跳转，我们可以看下回传的参数用来干嘛

其他界面点击上一步或者下一步的时候就调用finishActivityByResult(Utils.RESULT_CODE_TO_NO_STEP);

@Overridepublic void onClick(View view) {switch (view.getId()) {case R.id.back_settings_btn:finishActivityByResult(Utils.RESULT_CODE_TO_NO_STEP);break;case R.id.next_settings_btn:/*  Intent intent = new Intent();intent.setClass(OobeLoginiCloudActivity.this,OobeTermsAndConditionsActivity.class);intent.putExtra("GOTO_BY_ICLOUD",true);startActivity(intent);finish();*/finishActivityByResult(Utils.RESULT_CODE_TO_TWO_STEP);break;}}

 private void finishActivityByResult(int resultCode) {Intent intent = new Intent();setResult(resultCode, intent);finish();}

然后把这个是跳上一步还是下一步传回MainActivity，由MainActivity进行统一跳转，而不是从当前界面直接往下跳。

@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent intent) {Xlog.d(TAG, "onActivityResult resultCode = " + resultCode);switch (resultCode) {case Utils.RESULT_CODE_BACK:if (0 == mCurrentStep) {finish();} else {nextActivity(false);}break;case Utils.RESULT_CODE_NEXT:nextActivity(true);break;case Utils.RESULT_CODE_FINISH:finishOOBE();break;case Utils.RESULT_CODE_TO_ONE_STEP:// add by csc for ios 10mCurrentStep++;nextActivity(true);break;case Utils.RESULT_CODE_TO_TWO_STEP:// add by csc for ios 10mCurrentStep=mCurrentStep+2;nextActivity(true);break;case Utils.RESULT_CODE_TO_LOGIN_ICLOUD:// add by csc for ios 10intent = new Intent();intent.setClass(MainActivity.this,OobeLoginiCloudActivity.class);startActivityForResult(intent, 1001);break;case Utils.RESULT_CODE_TO_FORGET_PASSWORD:intent = new Intent();intent.setClass(MainActivity.this,OobeForgetPasswordActivity.class);startActivityForResult(intent, 1001);break;case Utils.RESULT_CODE_TO_CREATE_APPLE_ID:// add by csc for ios 10intent = new Intent();intent.setClass(MainActivity.this,OobeCreateAppleIdActivity.class);startActivityForResult(intent, 1001);break;case Utils.RESULT_CODE_TO_FORGET_APPLE_ID:// add by csc for ios 10intent = new Intent();intent.setClass(MainActivity.this,OobeForgetAppleIDActivity.class);startActivityForResult(intent, 1001);break;case Utils.RESULT_CODE_TO_NO_STEP:// add by csc for ios 10mCurrentStep--;nextActivity(true);break;case 100:{/**Begin: added by lzp **/if(mCurrentStep < 0) {mHandler.sendEmptyMessage(EVENT_SIM_DETECTING_READY);return;}/**End: added by lzp **/Intent backIntent = mStepActivityies.get(mCurrentStep).getIntent();backIntent.putExtra(Utils.OOBE_BASIC_STEP_TOTAL, mTotalStep);backIntent.putExtra(Utils.OOBE_BASIC_STEP_INDEX, mCurrentStep + 1);backIntent.putExtra(EXTRA_IS_OOBE, true);startActivityForResult(backIntent, mCurrentStep);overridePendingTransition(R.anim.slide_left_in, R.anim.slide_right_out);//overridePendingTransition(R.anim.zoomin, R.anim.zoomout);}break;case Utils.RESULT_SCREEN_OFF:{Intent lockScreenIntent = new Intent(ACTION_LOCK_SCREEN);startActivityForResult(lockScreenIntent, REQUEST_CODE_ADVANCED_SETTINGS);overridePendingTransition(R.anim.slide_left_in, R.anim.slide_right_out); //overridePendingTransition(R.anim.zoomin, R.anim.zoomout);}break;default:break;}}

到这里就完成了OOBE的界面跳转。

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