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" encoding= "Utf-8"?>2 LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"3 android:orientation= "vertical"4 Android:layout_width= "Fill_parent"5 Android:layout_height= "Fill_parent"6 >7 TextView8 Android:layout_width= "Fill_parent" 9 Android:layout_height= "Wrap_content" Ten Android:text= "@string/hello" One Android:id= "@+id/tv" A /> - EditText - Android:layout_width= "Fill_parent" the Androi

) Findviewbyid (r.id.phonenumber); ABTN =(Button) Findviewbyid (r.id.btn_call); -Btn.setonclicklistener (NewOnclicklistener () { - the @Override - Public voidOnClick (View v) { - if(Number.gettext (). toString (). Trim (). Equals ("")) { -Number.seterror ("Phone number cannot be empty"); +}Else { - +Intent i =NewIntent ("Android.intent.action.CALL", the Uri A. Parse ("Tel:" +Number.gettext (). toString (). Trim ())); at startactivity (i); - } - -

The pee of small problems encountered by Android development;@[email protected] When compiling and running the Android programThe console in Eclipse prompts the launch would only sync the application package on the deviceIt was found that the red part of the main activity in the Androidmanifest.xml was not added,Android:label= "@string/xxx"Android:name= ". XXX" >

Android.os.bundle;import Android.view.view;import Android.view.view.onclicklistener;import Android.view.Window; Import android.widget.button;/** * @author Yayun * @since September 14, 2015 * */public class Second extends Activity{private Button mbuttonsecond;/* (non-javadoc) * @see android.app.activity#oncreate (android.os.Bundle) */@Overrideprotected void OnCreate (Bundle savedinstancestate) {//TODO auto-generated method Stubsuper.oncreate (savedinstancestate); Requestwindowfeature (Window.fe

Because of the time problem, simply talk about your own understanding.As we all know, in Android development, do not need to manage their own, a garbage collection mechanism will automatically help us to recycleThere are no objects that are referenced to.What exactly is the garbage collection mechanism? Here is a list of some of my understanding.Garbage-Collected Threads:It was previously done in the main thread, and later moved to a lower priority.Pr

Android custom Cursor has a small problem. In many cases, Android applications use SQliter to store a large amount of data. Using sqlliter cannot help but deal with cursor. flexible use of cursor saves a lot of trouble. For example, you can combine your data in a virtual table (data set) and return it to the user in the form of cursor through the Provider. You ca

" $ Android:layout_height= "Wrap_content"Panax Notoginseng Android:text= "Btn3" /> - the View + Android:layout_width= "Fill_parent" A Android:layout_height= "0.5DP" the Android:background= "#e5e5e5"/> + - LinearLayout>Operating effect:The implementation method primarily places a imageview, view, or LinearLayout component and then sets it to the color of the divider line.Similarly, we can use the view to set up separate parts, the code is as follows:1 LinearLayout2

To help find scenarios that users might need to explain, Android provides a utility method, Shouldshowrequestpermissionrationale (). This method returns true if the app has previously requested this permission but the user rejected the request.Note: This method returns False if the user has rejected a permission request in the past and has selected the Don't ask again option in the Permission Request System dialog box. This method also returns false i

it used to be MVC to develop Android apps, but it felt that the frequent interaction of M and V in activity made the code bloated and the number of lines of codeIt's easy to reach thousands of lines. Not only that, the use of MVC makes the code readable and maintainable is very low scalability, some small functions of the increase,Deleting, modifying, and querying are very difficult, especially when the cod

1, Android How to let EditText not automatically get focusSolution: Find a EditText parent control to truncate the default behavior of EditText! Set upAndroid:focusable= "true"Android:focusableintouchmode= "true" >Example: Android:layout_width= "Match_parent" android:layout_height= "Match_parent" Android:focusable= "true" Android:focusableintouchmode= "true" > Android:layout_width= "Match_parent" android:layout_height= "W

1. The Java.lang.IllegalStateException:This app has a been built with a incorrect configuration. Configure your build for Vectordrawablecompat.2. Create an Android simulator.To download the system Image when creating the emulator, then there are 3 types ofThen it is suggested that x86 is the fastest speed. I'll pick it up, and then the Win7 system will be loaded HAXM Http://pan.baidu.com/s/1i4AWyu53 Android

Android Auto screenshot (off manual operation, automatically saved to PC)@echo offThe echo * file is saved under E:\takeshont and is named after the current date + time.Echo =================================================echo * If you cannot delete or upload after stopping, you can delete the Adb.exe process from the Task ManagerEcho =====================================================================echo * is, do not close this window ...Set t=%ti

?There are two methods of TextView:Setinputtype (int) settransformationmethod (Transformationmethod)Setinputtype can change the way TextView is entered: contact, Email, Date, time, short Message, Normal Text, Password, and so on. You can also specify a variety of correction options, such as capitalize the first letter of the word, capitalize the sentence, AutoCorrect, and so on.How to use: int InputType = Inputtype.type_class_text | Inputtype.type_text_flag_auto_correct | I

the number of millisecondsDate.parse ("2005/12/31 17:07:07");Date.parse ("2005/12/31");Date.parse ("7/8/2013 17:07:07");Date.parse ("Jul 8,2011 17:07:03");Date.parse ("2012-12-31t07:07:07"); IE10 support job: Emptying all elements in the arrayDOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en">HTML> Head> title>Homework.htmltitle> Metahttp-equiv= "keywords"content= "Keyword1,keyword2,keyword3"> Metahttp-equiv= "description"content= "This is my page"> Metahttp-equiv= "C

Because the project needs to do a simple menu association, in fact, it is simple to the left is a ListView selected time to refresh the right associated data, similar to the NetEase News Select Subscription pageIt is important to note that when you click on the left menu list, the right-hand refresh will not necessarily come out of the data, this time will be refreshed into the adapter inside processing can beNonsense do not say direct code, the code contains detailed remarksTotal data Source Se

In the Res folder, under the menu folder, such as (not new), build Main.xmlMainactivity.javaPackage Com.example.demo15;import Android.app.activity;import Android.os.bundle;import android.util.Log;import Android.view.menu;import Android.view.menuitem;public class Mainactivity extends Activity {@Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main);} Create Menu@overridepublic Boolean Oncreateoptionsmenu (Menu menu

Mainactivity.javapackage com.example.demo16;import Android.app.activity;import Android.content.intent;import Android.os.bundle;import Android.view.view;import Android.view.View.OnClickListener ; Import Android.view.window;import Android.widget.button;import Android.widget.linearlayout;public class Mainactivity extends Activity implements Onclicklistener {@Overrideprotected void onCreate (Bundle savedinstancestate) { Remove the activity title requestwindowfeature (window.feature_no_title); super.

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

public class Drawview extends view{public float currentx=40;public float currenty=50;Public Drawview (Context context) {super (context);}//rewrite OnDraw, protected void OnDraw (canvas canvas) {Paint paint=new paint () through canvas painting;Paint.setcolor (color.red);Canvas.drawcircle (Currentx,currenty,25,paint); }publicclassmainactivityextendsactivity{ @Override protectedvoidoncreate (bundlesavedinstancestate) { super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_main); l

Android actionbar hidden by a small arrow on the left, androidactionbar Styles. add the following style in xml, but this line of code will encounter an error The minimum version number of the AndroidManifest. xml file must be modified to 11.