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The storage and reading summary of Android serialization and the simple use of _android

have their own advantages and disadvantages, and we need to use them for different situations. 1. Use the Parcelable interface when more memory is required. Serializable produces a large number of temporary variables when serialized, causing frequent GC, compared to parcelable performance (after all, Android), so when using memory ( For example, serializing an object in a network to pass objects or serialize objects between processes, it is more recommended to use the Parcelable interface. 2

Juan Antonio Samaranch CentOS Nginx 163 installation process with WAF

wget http://nginx.org/download/nginx-1.6.3.tar.gz wget http://nginx.org/download/nginx-1.8.1.tar.gz wget http://zlib.net/zlib-1.2.8.tar.gz wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.38.tar.gz wget http://www.openssl.org/source/openssl-fips-2.0.12.tar.gz TAR-ZXVF nginx-1.6.3.tar.gz TAR-ZXVF zlib-1.2.8.tar.gz TAR-ZXVF pcre-8.38.tar.gz TAR-ZXVF openssl-fips-2.0.12.tar.gz CD openssl-

MediaPlayer of the framework of Android source analysis

"," () V ", (void *) Android_media_mediaplayer_release}, {" _reset ", "() v", (void *) Android_media_mediaplayer_reset}, {"Setaudiostreamtype", "(I) v", (VOID *) Android_media_mediaplayer_setaudiostreamtype}, {"Setlooping", "(Z) V", (void *) Android_media_mediaplayer_setlooping}, {"Islooping", "() Z", (void *) Android_me Dia_mediaplayer_islooping}, {"SetVolume", "(FF) V", (void *) Android_media_mediaplay Er_setvolume}, {"Native_invoke", "(Landroid/os/

Android directly communicates with RILD through Socket

(void) {sendAtFd =-1; // create a socket and connect fd = socket_local_client (SOCKET_NAME_RILD, ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM); if (fd The socket created here is a UNIX socket, the parameter is different from the network socket, The struct uses sockaddr_un. The field parameter should be PF_LOCAL,The communication type should be SOCK_STREAM or SOCK_DGRAM. For more information about UNIX local sockets, see the following documents: Http://zerocool60.blog.163.com/blog/static/

Parameters corresponding to the "Python" function

first call to function f, we do not have enough values, C is not assigned, C will use the default value of 10.The second time the function is called, C is assigned a value of 1, and the default value is no longer used.3. Parcel deliveryWhen defining a function, we sometimes don't know how many arguments are passed when the call is called. At this time, the parcel (packing) positional parameter, or the pack

Android Binder interprocess Communication---Registering service components---Sending and processing bc_reply return protocol

structure of the work item is then retrieved and saved in the variable T.The binder_transaction_data result body TR is then initialized with the binder_transaction structure T. The cmdbr_reply and TR are then returned to the user space.After thread threads executes the completion function Binder_thread_read, it returns to the function Binder_ioctl and returns to the member function Talkwithdriver of the Ipcthreadstate class. Finally, return to the member function waitForResponse of the Ipcthrea

Android AIDL Development

Parcelable.Creator CREATOR = new Parcelable.Creator () {@Overridepublic Student createFromParcel(Parcel in) {// TODO Auto-generated method stubreturn new Student(in);}@Overridepublic Student[] newArray(int size) {// TODO Auto-generated method stubreturn new Student[size];}};public Student(){}protected Student(Parcel in){readFromParcel(in);}public int getId() {return id;}public void s

Centos6.5 install Cloudera Manager5.3.2

/x86_64/ Install the rpm filePut the downloaded rpm package in the folder rpm (the folder name is random)$ Cd./rpm (enter the rpm directory)$ Yum localinstall -- nogpgcheck *. rpm (install the rpm package) Install the rpm fileGo to the download directory for the cloudera-manager-installer.bin$ Chmod u + x cloudera-manager-installer.bin (binfile permission for download)Run./cloudera-manager-installer.bin (about 10 minutes) Login CMEnter localhost: 7180 First Login Username: admin Password: adm

49. Various Android Span

); contentTV. setText (ssb ); Vcfnwyw4uu3bmp mrhcmq = "src =" http://www.bkjia.com/uploads/allimg/160101/0413234515-4.png "title =" \ "/> SuperscriptSpan Function: Set the text to the upper mark, which is used in mathematical formulas. SuperscriptSpan(Parcel src) SpannableStringBuilder ssb = new SpannableStringBuilder(content);ssb.replace(start, start + sub.length(), "Save6");Parcel

Stack information of dumpsys surfaceflinger (call relationship)

# Include Android: callstack stack; Stack. Update (1,100 ); Stack. Dump (""); Stack information of dumpsys surfaceflinger E/surfaceflinger (276): dumping hwcomposer. cpp D/callstacks (276): #00 PC 00023490/system/lib/libsurfaceflinger. so (Android: hwcomposer: dump (Android: string8 , char *, unsigned INT) const + 47)D/callstack (276): #01 PC 00028728/system/lib/libsurfaceflinger. so (Android: surfaceflinger: dumpalllocked (Android: string8 , char *, unsigned INT

Two ways to transfer objects in Android (serializable,parcelable)

: 1.implements parcelable2. Override the Writetoparcel method to serialize the object to a parcel object, that is, to write the data of the class to an externally supplied parcel, to package the data that needs to be passed to the parcel container to save the data from the parcel container3. Rewrite the Describeco

A detailed explanation of the complex parameter transfer between Android intent _android

", serializableuser); Bundle.putparcelable ("Parcelableuser", parcelableuser); Intent.setclass (listdemoactivity.this,objectactivity.class); Intent.putextras (bundle); StartActivity (intent); ==================== receive object====================== serializableuser serializableuser = (SerializableUser) Getintent (). Getserializableextra ("Serializableuser"); Parcelableuser Parcelableuser = (parcelableuser) getintent (). Getparcelableextra ("Parcelableuser"); It may be noted that the impl

Analysis of activitymanager framework

mode. Sometimes we call the proxy class local proxy and remote proxy ).Binder of the local proxy and remote proxy Let's take a look at the functions of the binder class. The meaning of the binder may be translated as adhesive, which will be pasted on both sides. In the operating system, a major role of the binder is to connect the local proxy and remote proxy. The most important function in binder is: Public final Boolean transact (INT code, parcel d

Practical Android technology: an in-depth understanding of Android RPC and AIDL

interface definition: public interface MyPrinterInterface extends android.os.IInterface {public void print(String msg) throws android.os.RemoteException;}abstract class MyPrinterInterfaceStub extends Binder implements MyPrinterInterface {private static final String DESCRIPTOR = "MyPrinterInterface";private static final String TAG = "MyPrinterInterfaceStub";public MyPrinterInterfaceStub() {attachInterface(this, DESCRIPTOR);}@Overridepublic IBinder asBinder() {return this;}@Overridepublic boolean

How does rongyun implement File Sending (advanced)

https: // xxx) sending a message is actually uploading a local file (you need a method similar to upLoadFile ), and the upload progress prompt. When a message is received, the user clicks the message and obtains the retomeUrl contained in the message body and downloads the message (you need a method similar to downLoadFile) after downloading the file, you can process it based on your App logic requirements. Implementation Code: FileMessageThis class is a file message entity class inherited fro

(1) passing Activity parameters and activity parameters

{@ OverrideProtected void onCreate (Bundle savedInstanceState ){Super. onCreate (savedInstanceState );SetContentView (R. layout. activity_ B );Intent intent = getIntent ();User user = (User) intent. getSerializableExtra ("user"); // get serialized dataTextView TV = (TextView) findViewById (R. id. TV );TV. setText (String. format ("nmae = % s, age = % d", user. getName (), user. getAge ()));}}4.2 Use the Parcelable interface provided by Android Public class User implements Parcelable {Private St

The practice of data Warehouse based on Hadoop ecosystem--environment construction (II.)

/authorized_keys cdh2:/root/.ssh/Scp/root/.ssh/authorized_keys cdh3:/root/.ssh/(2) Install Cloudera Manager on CDH1TAR-XZVF cloudera-manager*.tar.gz-c/opt/# Build CM Database/opt/cm-5.7.0/share/cmf/schema/scm_prepare_database.sh MySQL cm-hlocalhost-uroot-pmypassword--scm-host localhost SCM SCM SCM# Configure CM ProxyVi/opt/cm-5.7.0/etc/cloudera-scm-agent/config.ini# change CM host name to Cdh1Server_host=cdh1# Copy parcel related three files to/opt/cl

Parcelable Serialized Objects

The purpose of the serialization persist the object, save the object's byte sequence to the local file, to pass the object in the network by serializing the object, pass the object between processes through serialization, and Pass the complex custom class object in intent. The Parcelable interface needs to be implemented. Two. Methods for implementing serialization and comparison of advantages and disadvantages 1. Implement the Serializable interface, do not need a real-specific interface

A summary of issues caused by the transfer of large amounts of data between activity using intent

Reprint Please specify: big fly http://blog.csdn.net/rflyee/article/details/47441405the problem of using parcel to pass large amounts of data between activity. the activity passes large amounts of data between intent, causing the new activity to fail to start. The data transfer method between activity is summarized here.More commonly used is the direct use of intent transmission, such as the use of bundles, as follows:IntentIntent=NewIntent(Activitya.

Basic use of parcelable

Parcelable is an interface in which objects that implement the interface can be passed efficiently in the program. The object that is actually passed is parcel. According to the documentation, parcel is designed to be a high-performance IPC communication, not for persistent storage.Realized before the feeling is quite complicated, today I feel as if it is very simple.First, we write a book class that repres

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