java static段代码调用时间
public class SmsManager { private static SmsManager[] sInstance; private int mPhoneId = -1; static{ sInstance = new SmsManager[2]; for(int i =0; i<2; i++){ sInstance[0] = new SmsManager(i); Log.d("jimwind","SmsManager static "+i); } } private SmsManager(int phoneId){ mPhoneId = phoneId; } public static SmsManager getDefault(int phoneId){ if(phoneId > 1) throw new IllegalArgumentException("phoneId exceeds phoneCount"); Log.d("jimwind","SmsManager getDefault"); return sInstance[phoneId]; } }
使用类时，调用SmsManager.getDefault(0);先加载类，运行static代码段，然后运行getDefault();
TelephonyManager也是类似的方式。
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ITelephony.Stub.asInterface
ITelephony.aidl在编译时不使用，而是使用用Android的SDK中提供了一个aidl工具生成的ITelephony.java
ITelephony.java 就相当于两个进程间的通信协议。
实验：
/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.mi.telephony; /** * Interface used to interact with the phone. Mostly this is used by the * TelephonyManager class. A few places are still using this directly. * Please clean them up if possible and use TelephonyManager insteadl. * * {@hide} */ interface ITelephony { /** * Dial a number. This doesn't place the call. It displays * the Dialer screen. * @param number the number to be dialed. If null, this * would display the Dialer screen with no number pre-filled. */ void dial(String number); }
放在com/mi/telephony下面
>aidl com\mi\telephony\ITelephony.aidl
生成ITelephony.java
/* * This file is auto-generated. DO NOT MODIFY. * Original file: com\\mi\\telephony\\ITelephony.aidl */ package com.mi.telephony; /** * Interface used to interact with the phone. Mostly this is used by the * TelephonyManager class. A few places are still using this directly. * Please clean them up if possible and use TelephonyManager insteadl. * * {@hide} */ public interface ITelephony extends android.os.IInterface { /** Local-side IPC implementation stub class. */ public static abstract class Stub extends android.os.Binder implements com.mi.telephony.ITelephony { private static final java.lang.String DESCRIPTOR = "com.mi.telephony.ITelephony"; /** Construct the stub at attach it to the interface. */ public Stub() { this.attachInterface(this, DESCRIPTOR); } /** * Cast an IBinder object into an com.mi.telephony.ITelephony interface, * generating a proxy if needed. */ public static com.mi.telephony.ITelephony asInterface(android.os.IBinder obj) { if ((obj==null)) { return null; } android.os.IInterface iin = (android.os.IInterface)obj.queryLocalInterface(DESCRIPTOR); if (((iin!=null)&&(iin instanceof com.mi.telephony.ITelephony))) { return ((com.mi.telephony.ITelephony)iin); } return new com.mi.telephony.ITelephony.Stub.Proxy(obj); } public android.os.IBinder asBinder() { return this; } @Override public boolean onTransact(int code, android.os.Parcel data, android.os.Parcel reply, int flags) throws android.os.RemoteException { switch (code) { case INTERFACE_TRANSACTION: { reply.writeString(DESCRIPTOR); return true; } case TRANSACTION_dial: { data.enforceInterface(DESCRIPTOR); java.lang.String _arg0; _arg0 = data.readString(); this.dial(_arg0); reply.writeNoException(); return true; } } return super.onTransact(code, data, reply, flags); } private static class Proxy implements com.mi.telephony.ITelephony { private android.os.IBinder mRemote; Proxy(android.os.IBinder remote) { mRemote = remote; } public android.os.IBinder asBinder() { return mRemote; } public java.lang.String getInterfaceDescriptor() { return DESCRIPTOR; } /** * Dial a number. This doesn't place the call. It displays * the Dialer screen. * @param number the number to be dialed. If null, this * would display the Dialer screen with no number pre-filled. */ public void dial(java.lang.String number) throws android.os.RemoteException { android.os.Parcel _data = android.os.Parcel.obtain(); android.os.Parcel _reply = android.os.Parcel.obtain(); try { _data.writeInterfaceToken(DESCRIPTOR); _data.writeString(number); mRemote.transact(Stub.TRANSACTION_dial, _data, _reply, 0); _reply.readException(); } finally { _reply.recycle(); _data.recycle(); } } } static final int TRANSACTION_dial = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0); } /** * Dial a number. This doesn't place the call. It displays * the Dialer screen. * @param number the number to be dialed. If null, this * would display the Dialer screen with no number pre-filled. */ public void dial(java.lang.String number) throws android.os.RemoteException; }
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android 关于接口的使用：
以Mms中ConversationList与DraftCache.OnDraftChangedListener接口调用关系分析
1、 ConversationList implements DraftCache.OnDraftChangedListener
实现接口中的函数onDraftChanged
2、先查看在ConversationList类中，对类DraftCache的使用
列出：
DraftCache.getInstance().addOnDraftChangedListener(this);
DraftCache.getInstance().refresh();
DraftCache.getInstance().setDraftState();
DraftCache.getInstance().getSavingDraft());
DraftCache.getInstance().removeOnDraftChangedListener(this);
3、再查看在DraftCache类中，对接口OnDraftChangedListener方法onDraftChanged中的调用。
列出：
refresh() -> private synchronized void rebuildCache()->onDraftChanged
public synchronized void setDraftState() -> onDraftChanged
这里，onDraftChanged是接口使用者自己实现，调用关系由定义接口的类确定。(如果接口使用者直接调用就没有意义了)
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类AsyncQueryHandler 的使用
http://blog.csdn.net/chenqiumiao/article/details/7639577