android callback tutorial

@Override2 protected voidOnactivityresult (intRequestcode,intResultCode, Intent data) {3 if(ResultCode = = 10) {4Et_phone.settext (Data.getstringextra ("Phone"));5}Else if(ResultCode = = 20) {6Et_content.settext (Data.getstringextra ("content"));7 }8}Iv. Sending SMS1 Public voidbtnsendmsg (View v) {2String content =Et_content.gettext (). toString (). Trim ();3String phone =Et_phone.gettext (). toString (). Trim ();4 5Smsmanager sender =Smsmanager.getdefault ();6Arraylistsender.divideme

method in a WebView containing untrusted content could allow an attacker to manipulate the host application in unintended ways, executing Java code with the permissions of the host application. Use extreme care when using the This method in a WebView which could contain untrusted content. JavaScript interacts with Java object in a private, background thread of this WebView. Care was therefore required to maintain thread safety. The Java object ' s fields is not accessible. Paramete

Original URL: http://bbs.csdn.net/topics/390882717?page=11. I have a timer in my own program to go to readcharacteristic, each time read can be successful, but in the process after the call writecharacteristic found that the BLE device did not receive the set of data, Do not perform oncharacteristicwrite this callback, put the timer off do not execute readcharacteristic, only perform writecharacteristic, you can set the success, You can also receive o

Function: The caller can be separated from the callee.Here is a simple example, programmer A wrote a program (program A), which reserved a callback function interface, and encapsulated the program. Programmer B wants A to invoke a method in its own program B, so he callbacks his method in B through the interface in a . The example of Android is: Click on the button to call their own programmer to write the

Mainactivity is as follows: Package CN. testcallback; import android. OS. bundle; import android. app. activity;/*** demo Description: * use of callback interfaces in Android */public class mainactivity extends activity {@ overrideprotected void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate)

During network transmission under the ndk, an encoding conversion problem occurs, that is, the file name uploaded by the other party is GBK encoded in Chinese and needs to be converted to utf8 for processing. When programming in C/C ++, the system provides the character encoding conversion API. For example, functions such as multibytetowidechar and iconv library are available in windows, and wcstombs and mbstowcs can be used in pure C. However, I did not find the iconv library under the

Android onActivityResult is invalid or is executed first or has no callback problem. androidactivity uploads the value My problem is the first case. After the change, the result is returned. Http://www.cnblogs.com/tt_mc/p/3586834.html) Conflicts between the loading mode of Android Activity and the onActivityResult Method Preface During program debugging today, it

Android.util.AttributeSet;Import Android.widget.Button;Import Android.widget.Toast;Import Android.view.View;Import Android.view.View.OnClickListener;public class MyButton extends Button implements onclicklistener{Private context context;Public MyButton (context context, AttributeSet attrs, int defstyle) {Super (context, attrs, Defstyle);TODO auto-generated Constructor stub}Public MyButton (Context context) {Super (context);TODO auto-generated Constructor stub}Public MyButton (context context, A

followsNew Window Pass value 1Newwindow.putextra ("Key", "value");New Window value 1 endstartactivity (NewWindow);What the new form doesWrite in the oncreate of the new form// get the value from the previous form This . Getintent (). Getextras (); LOG.E ("Zllmsg", Bundle.getstring ("Bundlekey")); // gets the value that came from the previous form endThe new window closes and then passes the value back to the old windowWhat the old window didNew Intent (); Newwindow.setclass (mainactivity. t

For example, Baidu browser has a page search function, that is, actionmode. Callback, which is provided after android3.0. It should be used to replace the menu key because the menu key after 3.0 is canceled. However, most domestic manufacturers in China still retain the menu key, perhaps to better meet the Chinese usage habits. Http://blog.csdn.net/fireofstar/article/details/7350177 Http://www.android-doc.com/reference/

PackageCom.example.test_resume;Importandroid.app.Activity;ImportAndroid.os.Bundle;/*** In onwindowfocuschanged operation can effectively avoid the first launch of the app and every time from the background after the loading pop-up window times wrong unable to add window *--token null is not valid BUG * * * @authorNULL **/ Public classMainactivityextendsActivity {Private BooleanIsfirstlaunch =false; Private BooleanIsresume =false; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super

Onfinishinflate () triggers when all child controls in view are mapped to XMLonmeasure (int, int) determines the size of all child elementsOnLayout (boolean, int, int, int, int) triggered when view allocates the size and position of all child elementsonsizechanged (int, int, int, int) triggered when the size of the view changesOnDraw (Canvas) View details of rendered contentOnKeyDown (int, keyevent) has a button pressed and then triggeredonKeyUp (int, keyevent) triggers when the button is presse

Just add a piece of code anywhere:Orientationeventlistener Morientationlistener = new Orientationeventlistener (this, sensormanager.sensor_delay_ui) { public void onorientationchanged (int orientation) {}};if (Morientationlistener.candetectorientation ()) Morientationlistener.enable ();further, it would be better to switch to another type of sensor, without doing more experiments, and estimating how much less system energy would be available. This method is better than startforeground (any inte

/** * This class allows your listen to when the user is entering the background (i.e. after a home button press, * or op Ening recent apps etc) and when the user resumes the application from the background. * * @author John McDonnell */public class Betteractivitylifecyclecallbacks implements application.activitylifecyclecallbacks {private int mforegroundactivities; Private Boolean mhasseenfirstactivity; Private Boolean mchangingconfiguration; @Override public void onactivitycreated (ac

Tag: The his full log int instance string will modify the component1: A simple example Public Interface A { void printclassname ();} Public class Implements A { publicvoid printclassname () { System.out.println ("This is Class b! " ); }} Public Static void Main (string[] args) { new B (); A.printclassname ();}Normal output "This is class B"Interface A is defined in the main function, and the method of interface A is called, but it is important to note that when i

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