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hello (); @Overrideprotected void OnCreate (Bundle savedinstancestate ) {super.oncreate (savedinstancestate); Setcontentview (R.layout.fragment_main); Button tx= (button) Findviewbyid (r.id.test) Tx.setonclicklistener (new Onclicklistener () {@Overridepublic void OnClick (View v) {Jniprovideer jniprovideer=new jniprovideer (); String result= "";//result=jniprovideer.hello ();//int Add=jniprovideer.add (4, 5);//result=add+ "";//int[] intarray= Jniprovideer.getintarray (New int[]{3,5,5,4});//for

::onScreenOrientation(){ QAndroidJniEnvironment env; QAndroidJniObject activity = androidActivity(); jint orient = activity.callMethod The androidActivity () method in the QtAndroid namespace can return the Activity object used by the Qt application, and then directly call the setRequestOrientation () method to change the screen direction of the current Activity. Ringtone Mode Phone call ringtones generally have three modes: normal (Bell), mute, and vibrate. corresponding to the Code,

Android multithreading Analysis 2: Implementation of Thread, androidthreadAndroid multi-Thread Analysis II: Thread implementation Luo chaohui (http://www.cnblogs.com/kesalin/) CC license, reproduced please indicate the source In the previous article "Android multi-Thread analysis: Using Thread to asynchronously download images", we demonstrated how to use Thread

In addition to the ability to return data results from an activity, it is also very common to transmit data to an activity. 1. Create a new project, passdata. 2. Code in Main. xml. [Java]View plaincopy Android: layout_width = "fill_parent" Android: layout_height = "fill_parent" Android: Orientation = "vertical"

Algorithms for image nostalgia: We use the color matrix to achieve our nostalgic effect. If you do not know how colormatrix works, refer to: Image Color Processing (colormatrix) for Android study notes) This is the color matrix. We can use the above calculation method to change the value of our color matrix to achieve the desired effect. The above calculation method can be converted: M = In Android, the c

, notification); Nm.cancel (id_led); How to get the APK file installation time. Many Android developers want to design a APK management program to get the installation date of apk files. Many netizens don't quite understand. The method used in the early Android123 is to return an ApplicationInfo array through the Getinstalledapplications method of the Packagemanager class. SourceDir in the ApplicationInfo class can obtain the APK file path, which

; import android. OS. bundle; import android. OS. handler; import android. OS. message; import android. provider. settings; import android. util. displaymetrics; import android. util. log; import

the shortcut key // mnu1.serIcon (R. drawable. icon); // set the image} MenuItem mnu2 = menu. add (, 1, display the street map); {mnu2.setAlphabeticShortcut ('B'); // set the shortcut key // mnu1.serIcon (R. drawable. icon); // set the image} MenuItem mnu3 = menu. add (, 2, 3D map); {mnu3.setAlphabeticShortcut ('C'); // set the shortcut key // mnu1.serIcon (R. drawable. icon); // set image }}@ Override public boolean onOptionsItemSelected (MenuItem i

. list; import android. app. activity; import android. content. componentname; import android. content. context; import android. content. intent; import android. content. serviceconnection; import android. OS. bundle; import

This article from http://blog.csdn.net/hellogv/ Listview is a commonly used control. Each item in the listview can be a string or a combination control. First, let's talk about the implementation of listview: 1. PrepareData ; 2. with one-dimensional or multi-dimensional dynamic array save data. 2. build adapter , in simple terms, the adapter is item array ,

. Which of the following methods is correct for custom styles? A. B. C. D. 10. The methods that may need to be rewritten when using Menu in android are (ac ). (Multiple options) A, onCreateOptionsMenu () B. onCreateMenu () C. onOptionsItemSelected () D. onItemSelected () 11. Run the following T-SQL statement in SQL Server Management Studio with the output value (c ). SELECT @ IDENTITY A. It may be 0.1 B. It may be 3 C. Impossible-100 D. It must be

In addition to the ability to return data results from an Activity, it is also very common to transmit data to an Activity.1. Create a project named PassData.2. Code in main. xml.[Java] view plaincopy Android: layout_width = "fill_parent"Android: layout_height = "fill_parent"Android: orientation = "vertical">

Android Address Book Management 2 obtaining call records The previous blog talked about getting contact information, and this blog is about getting call records. Package cn. zxw. contact. domain;/*** call record * @ author zhan **/public class CallLogInfo {public String number; public long date; public int type; public CallLogInfo (String number, long date, int type) {super (); this. number = number; thi

database. then take the ID field from the contact record and store it in the string id and take the DISPLAY_NAME field and place it in the string name. for more information about cursors see the Android Cursor Tutorial. see Use of Android Contacts (1)Phone Numbers Phone number Phone numbers are stored in their own table and need to be queried separately. to query the phone number table use the URI stored i

ListView of common Android UI components (2) -- custom ListView This article introduces how to select multiple items and filter items in ListView ~ 1. Add the following code to the strings. xml file in the res/values Folder: BasicView5 Settings Hello world! Dwight D. Eisenhower John F. Kennedy

In the previous chapter, we did not remove the title bar and status bar. If the title bar and status bar are not displayed in the game, it is very easy to remove them, add the following two sentences to the onCreate method of mainActivity:RequestWindowFeature (Window. FEATURE_NO_TITLE); // set no titleGetWindow (). setFlags (WindowManager. LayoutParams. FLAG_FULLSCREEN, WindowManager. LayoutParams. FLAG_FULLSCREEN); // set full screenHurry up and try it. To write a program, you just need to try

ringer_mode_silent 0#define ringer_mode_vibrate 1As shown in 1, ringtone mode is selected by a set of radio buttons (Qradiobutton). I use Qbuttongroup in my code to manage three radio buttons, and set the ID of each button to the ringtone mode it represents. So when the Qbuttongroup "buttonclicked (int id)" Trigger, our slot "void widget::onringermodeclicked (int mode)" is called, the parameters are directly ring mode, very convenient.Let's take a l

specified by Activity NDEF_DISCOVERED, TECH_DISCOVERED, and TAG_DISCOVERED is very important. When an Android device detects an NFC Tag approaching, the Intent containing NFC messages will be sent to the corresponding Activity according to the Order stated by the Action. 2. Android NFC message sending mechanism When an Andro