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 commi elephonyITelephony.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