remembered it. The most exciting is when the iphone was first announced. At that time the amid Lord said a word: I waited for 2 years and 06 months. Then the following cheers were a piece. The pursuit of the ultimate product, who can not compare with him, then Ivy is just under the Taiwan serious listening to the announcement. But disease is always inevitable.Cook then took over the Apple and announced that iphone5,5s, now a mere paranoid apple, is n
, the style of the leader whenever I think of the heart of life admiration. The most exciting thing was when the iphone was released, when the amid Lord said a word: "I waited 2 years and 06 months for today." Then the following cheers, the kind of the pursuit of the ultimate product, who can not compare with him, then Ivy is just under the Taiwan serious listening to the conference. But disease is always inevitable.Later, Cook picked up the Apple, released the iphone5,5s to now can only say a
Android Log Tag meaning, androidlogtag meaning
One of the most important methods to analyze Android problems is to analyze logs in events. there are many system logs in the log, some of which are not very familiar with the meaning. The following is the system log tag obtaine
Android Development Learning-first Android Program (meaning of various parameters), first android
Next we will build the first Android program.
Open Eclipse and start the following steps:
1. File ==> New ==> the following window appears for the
, rather than providing specific values. For example: Android:textcolor= "? Android:textdisabledcolor" Note that this is very similar to resource references, except that we use a "?" Prefix instead of "@". When you use this tag, you provide the name of the property resource, which will be looked up in the subject, so you do not need to display the declaration of that type (if the declaration is in the form of Android:attr/android:textdisabledcolor). In addition to using the identifier of this re
you have tested, with the new version of Android?? OID, you should test the application in the new version and update it to conform to the latest APIs and take advantage of the new platform features.Compile with: Represents the platform version of the application at compile time. By default, the SDK is set to the latest version.Theme: Specifies the Android UI style that applies to the application. You can
Android self-learning course-callback function meaning (source code + example), android callback function
Why do we learn the callback function? Let's start with the thread. Although I have written an article called "Android self-learning process-multithreading" before, I am still too young.
When I was learning the thr
providing specific values. For example:Android:textcolor= "? Android:textdisabledcolor"Note that this is very similar to resource references, except that we use a "?" Prefix instead of "@". When you use this tag, you provide the name of the property resource, which will be looked up in the subject, so you do not need to display the declaration of that type (if the declaration is in the form of Android:attr/android:textdisabledcolor). In addition to using the identifier of this resource to query
providing specific values. For example:Android:textcolor= "? Android:textdisabledcolor"Note that this is very similar to resource references, except that we use a "?" Prefix instead of "@". When you use this tag, you provide the name of the property resource, which will be looked up in the subject, so you do not need to display the declaration of that type (if the declaration is in the form of Android:attr/android:textdisabledcolor). In addition to using the identifier of this resource to query
providing specific values. For example:Android:textcolor= "? Android:textdisabledcolor"Note that this is very similar to resource references, except that we use a "?" Prefix instead of "@". When you use this tag, you provide the name of the property resource, which will be looked up in the subject, so you do not need to display the declaration of that type (if the declaration is in the form of Android:attr/android:textdisabledcolor). In addition to using the identifier of this resource to query
providing specific values. For example:Android:textcolor= "? Android:textdisabledcolor"Note that this is very similar to resource references, except that we use a "?" Prefix instead of "@". When you use this tag, you provide the name of the property resource, which will be looked up in the subject, so you do not need to display the declaration of that type (if the declaration is in the form of Android:attr/android:textdisabledcolor). In addition to using the identifier of this resource to query
providing specific values. For example:Android:textcolor= "? Android:textdisabledcolor"Note that this is very similar to resource references, except that we use a "?" Prefix instead of "@". When you use this tag, you provide the name of the property resource, which will be looked up in the subject, so you do not need to display the declaration of that type (if the declaration is in the form of Android:attr/android:textdisabledcolor). In addition to using the identifier of this resource to query
This attribute indicates whether the view is displayed,
For example, Android: visibility = "gone" in relativelayout"
It has three attributes: visvisible display; invisvisible display black background entries; gone not display
In the class, you can set whether it is displayed or not, setvisibility (view. Gone); Not Displayed
Setvisibility (view. Visible); Display
Meanings of setvisibility method values in
1. What is a digital signature? A digital signature is a sign of your program as your own, and when someone sees the signature, they know it's relevant to you .2. Why digital signatures? The simplest and most straightforward answer: system requirements. Android requires every Android app to be digitally signed to install into the system, meaning that if an
specific values. For example:
Android: textcolor = "? Android: textdisabledcolor"
Note that this is very similar to resource reference, except that we use "? "Prefix replaces "@". When you use this tag, you provide the name of the property resource, which will be searched in the topic, so you do not need to display the Declaration type (if the Declaration, the form is?
One: The meaning of the signature:With so many people developing Android, it's entirely possible that we all put the class name, the package name, in the same name, how do you differentiate it? Signature is a distinguishing function.Since the developer may be confused by using the same package name to replace the installed program, the signature can guarantee a considerable name, but the signature of differ
1. What is a digital signature? A digital signature is a sign of your program as your own, and when someone sees the signature, they know it's relevant to you .2. Why digital signatures? The simplest and most straightforward answer: system requirements. Android requires every Android app to be digitally signed to install into the system, meaning that if an
change network connection statusAndroid.permission.CHANGE_WIFI_STATE.Allow programs to change Wi-Fi connection statusAndroid.permission.CLEAR_APP_CACHE.Allows a program to be clearly cached from all installed programs in the deviceAndroid.permission.CLEAR_APP_USER_DATA.Allow a program to clear user settingsAndroid.permission.CONTROL_LOCATION_UPDATES.Enables disable location update prompt from wireless moduleAndroid.permission.DELETE_CACHE_FILES.Allow programs to delete cache filesAndroid.permis
Explanations of IDE, ADT, SDK, JDK, Ndk in Android1. IDE:Intelligent Development environm for short. That is, the intelligent development environment. is a development tool. Common Ides are adt-bundles and Android studio. Each of the two needs to configure the JDK.2. ADT:Short for Android development tools. That is, Android development tools. ADT is a plug-in for
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