android sdcard path

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Android Development Learning Path-let annotations help you simplify your code and completely abandon Findviewbyid

method. @ViewInject (r.id.buy) private Span style= "color: #000000;" > button buy, @ViewInject (R.id.money) private TextView money; @ViewInject (r.id.tv_power) private TextView Power; @ViewInject (R.id.tv_life) private TextView life; @ViewInject (R.id.tv_dex) private TextView Dex; @Override protected void onCreate (Bundle savedinstancestate) { super. OnCreate (savedinstancestate); Setcontentview (r.layout.activity_main); Annotateutils.injectviews (this);}Finally, there ar

The advanced path of Android development

Client Development Engineer, simply describe in a few aspects of the different levels of personal understanding: 1, the beginner can skillfully use the components provided by the system framework, build the required applications, 2, intermediate, will be in the framework of the system such as view drawing, broadcast mechanism, memory management, Mixed language writing and other content has a special research, can be very good to achieve high efficiency of the custom components, but also can be f

The Learning Path of Android

applicationThe nameicons, access rights, and other properties.Add a button to the Main.xmlandroid:text= "Click Me ah Ah"Android:layout_width= "Fill_parent"android:layout_height= "Wrap_content"/>Where fill_parent means the size of the whole container, wrap_content rootAccording to the content to change the size, basic can be put down.R.java is automatically generated by the AAPT tool, can r.java understand as resource wordCode, each type of resource corresponds to the internal classes of r, such

Android Development Learning Path--ui Basic layout

code to add Android:stretchcolumns=1, which means to extrude the 2nd column with the following code:the effect is as follows:In this way, basically the landing interface is very beautiful.About the layout basically this, hurriedly finished this article, and then organize things, ready to go home. Tomorrow is the year Eve, the New year hope to finish Android learning, and then write a few apps, more research design mode, architecture,

Android Development Learning Path-leakcanary use

Leakcanary is a memory leak detection library that can alert you when a memory leak occurs in our application, including notifications and logs. GitHubThis library is relatively simple to use:① Add Dependency:1 Dependencies {2 debugcompile ' com.squareup.leakcanary:leakcanary-android:1.5 '3 releasecompile ' com.squareup.leakcanary:leakcanary-android-no-op:1.5 '4 testcompile ' com.squareup.leakcanar

Android Development Learning Path--drawable mutations

(). Setalpha (255-progress); Test2.invalidate (); }@Override Public void Onstarttrackingtouch(SeekBar SeekBar) { }@Override Public void Onstoptrackingtouch(SeekBar SeekBar) { }?? Here, by dragging the seekbar and then changing the alpha value of the Button1, there is no alpha button2 set, just the Button2 refresh. You can look at the effect:?? Obviously we didn't set Button2 's background, so why Button2 's background transparency also ch

How Android obtains the system external memory card path

The Android system can get the path of the memory card through Environment.getexternalstoragedirectory (), but now there are a lot of phones built in a storage space, but also support the external SD card insertion, This through the Environment.getexternalstoragedirectory () method to obtain is the location of the internal memory card, the need to obtain the path

Android Select picture, get path by URI

/** * Gets the absolute path of the picture according to the URI * * @param Context Context Object * @param URI of the image of the URL * @return if the URI corresponding to the picture exists, then return The absolute path of the picture, otherwise returns NULL */public static String Getrealpathfromuri (context context, Uri uri) {int sdkversion = B Uild. VERSION. Sdk_int; if (sdkversion >=) {

Android get photo and path implementation method _android

Android Development Get photo album of the way There are many kinds of online, here is a Android4.4 method, because the higher the version, some old APIs will be discarded, the new API and the old API is incompatible, resulting in a lot of problems. For example: Managedquery () has now been replaced by Getcontentresolver (). query (), but their parameters are the same such as Android4.4 after Intent (intent.action_get_content) and Intent (intent.act

Android Development Learning Path-asynchronous operation with Asynctask

=NewSimpleadapter (Getapplicationcontext (), Mlist, - Android. R.layout.simple_list_item_1, in NewString[] {"string" }, the New int[] {Android. R.ID.TEXT1}); the Mlistview.setadapter (madapter); About}Else { theToast.maketext (Getapplicationcontext (), "Download error!", the toast.length_short). Show (); the } + } - the }Bayi the}Sho

The use of the ListView in the Android Learning path

(adapterviewStart looking at the from and to parameters,Context-the context where the View associated with this simpleadapter is runningdata-a List of Maps. Each entry in the list corresponds to one row in the list. The Maps contain the data for each row, and should include all the EntriEnglish can not understand, see for yourself, my understanding is one by one correspondenceThis defines:Private string[] from = {"Pict", "Contents1", "Contents2"};p rivate int[] to = {R.id.imageviewid, r.id.text

The path to Android development and learning-experience at the beginning of RxAndroid

The path to Android development and learning-experience at the beginning of RxAndroid After learning android for a while, I read some of the project code, and then I think it is boring to learn the basics. So I will learn new things, I believe that many java learners have heard of RxJava, so RxAndroid is also available in and

Android transfers images or other files in the memory card to another path.

Android transfers images or other files in the memory card to another path. This is a simple problem, but it is also a problem we often encounter, that is, how to store images or other files on the memory card during Android development, then we can process this file. Because we cannot process the original file, we are currently working on an

The path of Android development Learning--a preliminary study of programming environment

longAs you specify a the parent activity in Androidmanifest.xml.int id = item.getitemid ();Noinspection simplifiableifstatementif (id = = r.id.action_settings) {return true;}return super.onoptionsitemselected (item);}The function is the event that is triggered when the menu is selected, which item is filtered with the ID, and the following can write a SWITHCH statement to perform the corresponding operation.3. The layout file activity_main.xml the layout file for the program and the layout file

Android Development Learning Path-environment building

Here you choose to use the Android Studio integrated development environment, because as is a separate environment for Android developed by Google, and the iteration cycle is fast, so it will certainly replace Eclipse as the Andorid development environment. For me without the Eclipse Foundation, you can start learning directly from as.Build the environment,1. Download as Withiout SDK2. Import your own SDK L

Android Path acquisition

Internal PathEnvironment.getdatadirectory () =/dataEnvironment.getdownloadcachedirectory () =/cacheEnvironment.getrootdirectory () =/systemContext.getcachedir () =/data/data/com.penngo.test/cacheContext.getfilesdir () =/data/data/com.penngo.test/filesMemory card PathEnvironment.getexternalstoragedirectory () =/storage/sdcard0Selectable values Directory_music, directory_podcasts, Directory_ringtones,Directory_alarms, Directory_notifications, Directory_pictures,Directory_movies, Directory_download

Android learning path-data usage (1)

Android learning path-data usage (1) Today is the fourth day of Android learning. In the morning, I learned how to store and use data. Here, I will summarize the data in the morning. Data storage is divided into four categories: * File * Sharedpreference (parameter) * SQLite Database * Content provider (Content provide) Let's take a look at the first two methods:

Android Small white growth path-listview optimization proposal

In Android development, the ListView is a very important component, it is in the form of a list of data based on the long adaptive presentation of the content, the user can freely define the layout of each column of the ListView, but when the ListView has a large amount of data to load, will occupy a lot of memory, Affect performance.The focus of this article is to describe how to optimize the ListView in the following ways.1, Convertview ReuseUse goo

Use the android. graphics. Path class to customize the PopupWindow background

Use the android. graphics. Path class to customize the PopupWindow backgroundIntroduction to PopupWindow PopupWindow is a container suspended on the current activity. It can be used to display any content.PopupWindow has the following location-related APIs:ShowAsDropDown (View anchor, int xoff, int yoff, int gravity) In the lower left corner of anchor, adjust the distance through xoff and yoff. gravity is t

Android imitation path menu Animation

Experience of Dave Morin, founder of path, on cell phone applicationsHttp://tech.163.com/12/0711/21/865OJ4L000094L5O.html Demo prototype of Button animation effect in the lower left corner of the path application on AndroidHttp://www.apkbus.com/android-43269-1-1.html Superb animation effect: Millions of downloads, path2.0 button animation effectHttp://www.eoean

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