打一个电话流程简介

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一个电话打出去流程分析

1. 配置文件AndroidManifest.xml

文件路径：packages/apps/Contacts/AndroidManifest.xml

其中属性android:enabled="@*android:bool/config_voice_capable"是用来控制应用是否在菜单中显示的，在禁用通话时会用到

<activityandroid:name=".activities.BestoneDialtactsActivity"

android:label="@string/launcherDialer"

android:theme="@style/BestoneDialtactsTheme"

android:uiOptions="splitActionBarWhenNarrow"

android:launchMode="singleTask"

android:clearTaskOnLaunch="true"

android:icon="@drawable/ic_launcher_phone"

android:screenOrientation="portrait"

android:enabled="@*android:bool/config_voice_capable"

android:taskAffinity="android.task.contacts.phone"

android:windowSoftInputMode="stateAlwaysHidden|adjustPan"

android:hardwareAccelerated="true">

….

<intent-filter>

<actionandroid:name="android.intent.action.MAIN" />

<categoryandroid:name="android.intent.category.DEFAULT" />

<categoryandroid:name="android.intent.category.LAUNCHER" />

<categoryandroid:name="android.intent.category.BROWSABLE" />

</intent-filter>

……

</activity>

2. 在联系人目录中，从拨号盘界面，输入拨打号码，按下拨打按钮

(a). 拨号盘界面的构建

文件路径：packages/apps/Contacts/src/com/android/contacts/activities/BestoneDialtactsActivity.java

public void onCreate(Bundle icicle) {

......

//此布局是框架布局，嵌入搜索（SearchFragment）,拨号盘（DialpadFragment）

setContentView(R.layout.bestone_dialtacts_activity);

......

}

(b).按数字按钮和拨打按钮

文件路径：packages/apps/Contacts/src/com/android/contacts/activities/BestoneDialtactsActivity.java

public boolean onKeyDown(int keyCode,KeyEvent event) {

……

handled = mDialpadFragment.onKeyDown(keyCode,event);

……

}

文件路径：packages/apps/Contacts/src/com/android/contacts/activities/DialpadFragment.javas

public booleanonKeyDown(int keyCode, KeyEvent event) {

……

if (event.getKeyCode() ==KeyEvent.KEYCODE_CALL) {

//如果点击的是拨打按钮，则拨出电话

dialButtonPressed();

return true;

}

//如果点击的是数字按钮，则作播放提示音等处理

……

}

public voiddialButtonPressed() {

dialButtonPressedInner(mDigits.getText().toString(),

Constants.DIAL_NUMBER_INTENT_NORMAL);

}

protected void dialButtonPressedInner(String number, int type) {

……

//这里返回的intent指向com.android.phone.PrivilegedOutgoingCallBroadcaster（备注，在package/app/Phone目录下）

final Intent intent = ContactsUtils.getCallIntent(number,

(getActivity() instanceofBestoneDialtactsActivity ? ((BestoneDialtactsActivity) getActivity())

.getCallOrigin(): null), type);

mCallOptionHandler.doCallOptionHandle(intent);

……

}

文件路径：packages/apps/Contacts/src/com/android/contacts/calloption/ContactsCallOptionHandler.java

public void doCallOptionHandle(Intent intent) {

……

//获取Telephony服务的接口

final ITelephonytelephony =

ITelephony.Stub.asInterface(ServiceManager.getService(Context.TELEPHONY_SERVICE));

……

SimAssociateHandler.getInstance(ContactsApplication.getInstance()).load();

//启动到package/app/Phone/src/com/android/phone/PrevilegedOutgoingCallBroadcaster

super.doCallOptionHandle(mActivityContext,ContactsApplication.getInstance(), intent,

this, ContactsApplication.getInstance().cellConnMgr,

telephony, SlotUtils.isGeminiEnabled(),

FeatureOption.MTK_GEMINI_3G_SWITCH);

……

}

3. 在电话目录下，接到Intent，继续将电话打出去

(a). 配置文件AndroidManifest.xml

文件路径：package/app/Phone/AndroidManifest.xml

<activity-aliasandroid:name="PrivilegedOutgoingCallBroadcaster"

android:targetActivity="OutgoingCallBroadcaster"

android:screenOrientation="nosensor"

android:excludeFromRecents="true"

android:permission="android.permission.CALL_PRIVILEGED">

……

</activity-alias>

(b).文件路径：package/app/Phone/src/com/android/phone/OutgoingCallBroadcaster.java

protected voidonCreate(Bundle icicle) {

……

Intent intent =getIntent();

//处理意图

processIntent(intent);

}

private voidprocessIntent(Intent intent) {

final Configurationconfiguration = getResources().getConfiguration();

if(!PhoneGlobals.sVoiceCapable) {

//如果禁用语言业务，则做相应处理

handleNonVoiceCapable(intent);

return;

}

//省略号码合法性检查，以及紧急号码的处理，点亮屏幕

……

if (callNow) {

……

// InCallScreen todisplay the in-call UI:

PhoneGlobals.getInstance().callController.placeCall(intent);

……

}

(c). 文件路径：package/app/Phone/src/com/android/phone/CallController.java

public voidplaceCall(Intent intent) {

......

//获取拨号界面的状态，以便正确显示相应状态下UI

final InCallUiStateinCallUiState = mApp.inCallUiState;

......

//检查当前是否有前端通话或者后台通话,如果有先挂断这些通话

PhoneConstants.Statestate = mCM.getState();

if (isEccCall && state !=PhoneConstants.State.IDLE) {

......

try {

mCM.hangupAllEx();

log("Waiting for disconnect exist calls.");

return;

} catch (CallStateExceptione) {

log("catch exception = " + e);

}

......

}

......

//拨打电话

CallStatusCode status= placeCallInternal(intent);

switch (status) {

//拨打结果的处理

case SUCCESS:

case EXITED_ECM:

....

}

......

}

private CallStatusCodeplaceCallInternal(Intent intent) {

……

callStatus =PhoneUtils.placeCall(mApp,

phone,

number,

contactUri,

(isEmergencyNumber || isEmergencyIntent),inCallUiState.providerGatewayUri);

……

}

(d). 文件路径：package/app/Phone/src/com/android/phone/PhoneUtils.java

public static intplaceCall(Context context, Phone phone,

String number, Uri contactRef, boolean isEmergencyCall,

Uri gatewayUri) {

returnplaceCallGemini(context, phone, number, contactRef, isEmergencyCall,gatewayUri, -1);

}

public static intplaceCallGemini(Context context, Phone phone,

String number, UricontactRef, boolean isEmergencyCall,

Uri gatewayUri,int simId) {

……

try {

// Google code: connection = app.mCM.dial(phone,numberToDial);

connection =GeminiRegister.dial(callManager, phone, numberToDial, simId);

} catch(CallStateException ex) {

……

}

文件路径：package/app/Phone/src/com/mediatek/phone/gemini/GeminiRegister.java

public staticConnection dial(Object callManager, Phone phone, String numberToDial, intslotId)

throwsCallStateException {

……

Connectionconnection = null;

try {

if(GeminiUtils.isGeminiSupport() && !isSipPhone) {

……

connection = ((MTKCallManager) callManager).dialGemini(phone,numberToDial, dialSlot);

} else{

//到这里才算真正调用到Framework中接口方法

connection = ((CallManager) callManager).dial(phone, numberToDial);

}

} catch(CallStateException ex) {

……

}

……

}

4. Framework下调用Telephony相关接口，将电话拨出

文件路径：framework/opt/telephony/src/java/com/android/internal/telephony/CallManager.java

publicConnection dial(Phone phone, String dialString) throws CallStateException {

//根据Phone类型，获得GSMPhone或者CDMAPhone实例

Phone basePhone = getPhoneBase(phone);

......

result = basePhone.dial(dialString);

......

}

文件路径：framework/opt/telephony/src/java/com/android/internal/telephony/gsm/GSMPhone.java

publicConnection dial(String dialString) throws CallStateException {

return dial(dialString, null);

}

publicConnection dial (String dialString, UUSInfo uusInfo) throws CallStateException{

//对MMI码作处理

……

if (mmi == null) {

return mCT.dial(newDialString,uusInfo);

}

文件路径：framework/opt/telephony/src/java/com/android/internal/telephony/gsm/

未完待续。。。。

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