Android連載40-ITelecomService詳解

一、撥號流程總結

• DialpadFragment提供用戶撥號的交互界面
• CallIntentBuilder創建撥號請求的intent對象
• TelecomManager繼續傳遞撥號請求intent對象

二、ITelecomService接收撥號請求服務

• /packages/services/Telecomm/src/com/android/server/telecom這個代碼庫編譯出來就是Telecom.apk Android應用程序，後面統一稱爲Telecom應用

        <service android:name=".components.TelecomService"
                android:singleUser="true"
                android:process="system">
            <intent-filter>
                <action android:name="android.telecom.ITelecomService" />
            </intent-filter>
        </service>

• 指定進程爲system,也就是這個服務將會運行在system_server系統，唯一的action爲android.telecom.ITelecomService.

❝

注意：Dialer應用的com.android.dialer進程提供用戶撥號界面並且響應用戶的撥號請求，把撥號請求包裝成action爲Intent.ACTION_CALL的intent對象，通過調用ITelecomService提供的placeCall接口，將撥號請求intent發送給了Telelcom應用（system_server進程），完成了第一次跨進程的服務調用。

❞

• 看一下TelecomServiceImpl.java文件中的placeCall方法

public void placeCall(Uri handle, Bundle extras, String callingPackage) {
            try {
                Log.startSession("TSI.pC");
                enforceCallingPackage(callingPackage);

                PhoneAccountHandle phoneAccountHandle = null;
                if (extras != null) {
                    phoneAccountHandle = extras.getParcelable(
                            TelecomManager.EXTRA_PHONE_ACCOUNT_HANDLE);
                    if (extras.containsKey(TelecomManager.EXTRA_IS_HANDOVER)) {
                        // This extra is for Telecom use only so should never be passed in.
                        extras.remove(TelecomManager.EXTRA_IS_HANDOVER);
                    }
                }
                boolean isSelfManaged = phoneAccountHandle != null &&
                        isSelfManagedConnectionService(phoneAccountHandle);
                if (isSelfManaged) {
                    mContext.enforceCallingOrSelfPermission(Manifest.permission.MANAGE_OWN_CALLS,
                            "Self-managed ConnectionServices require MANAGE_OWN_CALLS permission.");

                    if (!callingPackage.equals(
                            phoneAccountHandle.getComponentName().getPackageName())
                            && !canCallPhone(callingPackage,
                            "CALL_PHONE permission required to place calls.")) {
                        // The caller is not allowed to place calls, so we want to ensure that it
                        // can only place calls through itself.
                        throw new SecurityException("Self-managed ConnectionServices can only "
                                + "place calls through their own ConnectionService.");
                    }
                } else if (!canCallPhone(callingPackage, "placeCall")) {
                    throw new SecurityException("Package " + callingPackage
                            + " is not allowed to place phone calls");
                }

三、源碼：

• https://github.com/ruigege66/Android/tree/master/ContactsTest
• CSDN：https://blog.csdn.net/weixin_44630050
• 博客園：https://www.cnblogs.com/ruigege0000/
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