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(r.layout.new_layout);InitData ();Set the data returned to the previous pageSetbackdata ();}private void InitData () {textview= (TextView) Findviewbyid (R.id.text);button= (Button) Findviewbyid (R.id.button1);Get the data transferred from the last page put in intent.Intent=this.getintent ();Bundle=intent.getextras ();Sex=bundle.getstring ("Sex");Height=bundle.getdouble ("height");if (Sex.equals ("M")) {sex
1. Data transfer of Interface jump(1) intent.setdata ()---Intent.getdata ();The data passed is relatively simple, usually a literal type of data string; If we pass on data that is more complex (several types), or longer, this method is less practical. (2) If there are a lot
The first is the call service for the system clipboard:Clipboardmanager Clipboardmanager=getsystemservice (Context.clipboard_service);Then it is written, taken out.It is important to note that before Android version 11, the use of the Clipboard to pass data using the SetText and GetText methods, but after version 11, the two GetText and set methods are discarded, instead of the need to use the Clipdata obje
1. Global objects are a more practical way to transmit data between activities. For example, there are four scopes in Java Web. The Four Scopes are Page, Request, Session, and Application, the Application domain can be used and accessed anywhere in the Application, unless the Web server stops. The Global Object in Android is very similar to the Application field in Java Web. As long as the
; } Public classEx0315servicereceiver extends broadcastreceiver{@Override Public voidOnReceive (Context context, Intent Intent) {Bundle Mbundle=Intent.getextras (); intCount=mbundle.getint ("Count"); Mtextview=(TextView) Findviewbyid (ID. Ex0315textview); Mtextview.settext (String.valueof (count)); } } }add in manifest service android:name="com.iruisi.service.Ex0315Service" android:exported="false" > This service is in a different bag.
Set values by Putextra, get values by GetextraPutextra need to set the key-value pair, Getextra by the corresponding key to get the passed value (directly between the Getextra plus the value type you want to get)1. Open another activity in one activity through Startactivityforresult ()2. This method usually receives two parameters, the first one is the intent object, the second is the Requestcode3. In the first activity, rewrite the Onactivityresult method, by switch to determine the transmitted
I. Public Intent PutExtra (String name, double[] value)Set Method Intent.putextra ("AAA", "bbbb");Get Method This.getintent (). Getcharsequenceextra ("AAA")Ii. public Intent Putextras (Bundle extras)Setup MethodBUNDLE BD = new bundle ();bd.putstring ("AAA", "bbbb");Intent.putextras (BD);Get MethodBundle bd=this.getintent (). Getextras ();bd.getstring ("AAA")); Iii. SummaryThe band S has to bind the data through a bundle. ---Putextra and Putextras of
In the project, the inevitable to two pages between the data transfer, even if not delivery, but also need to be refreshed and so on, we are based on the Library class method provided by Google, but also can do, mainly broadcast broadcastreceiver, StartActivity methods or application instances and so on, are all working (as long as the implementation is good, after all, the function implementation takes pre
= (*env)->newbytearray (Env,len); (*env)->setbytearrayregion (env, ByteArray, 0, len, buffer); CLS = (*env)->getobjectclass (env, retobj); FID = (* ENV)->getfieldid (env, CLS, "Retbytes", "[B"]); (*env)->setobjectField (env, retobj, FID, ByteArray); 4. How to return a string in C to java Char charstr[50]; Jstring jstr;jstr = env-Newstringutf (CHARSTR);5. How much space does not know how to use buffer, how to pass out? In the JNI C file, new out of space, passed out. Java
I. Public Intent PutExtra (String name, double[] value)Set Method Intent.putextra ("AAA", "bbbb");Get Method This.getintent (). Getcharsequenceextra ("AAA")Ii. public Intent Putextras (Bundle extras)Setup MethodBUNDLE BD = new bundle ();bd.putstring ("AAA", "bbbb");Intent.putextras (BD);Get MethodBundle bd=this.getintent (). Getextras ();bd.getstring ("AAA")); Iii. SummaryThe band S has to bind the data through a bundle.---Putextra and Putextras of
Activity transmits data to the broadcast receiver simply by put the data into the intent before sending the broadcast.How does a broadcast receiver transmit data to the activity? The interface is used here, by defining an interface in the broadcast receiver, and then the activity that receives the broadcast receiver data
For Android, passing complex types is primarily about converting its own class into a base byte array, and passing data between the activity is accomplished through intent. There are two main methods of the Android serialization object, which is to implement the serializable interface, or implement the Parcelable interface. The implementation of the serializable
time and then delete one of the two.This is all done at the same time. Use the Add (), remove (), replace () method, add all the required changes, and then call the commit () method to apply the changes.Before the commit () method, you can call Addtobackstack () and add the transaction to the Backstack, which is the back stack by the activityManaged, when the user presses the return key, it returns to the state of the previous fragment.Receive data a
firstThe activity's OnPause () method does not call the OnStop () method, because the first activity is still visible. If you turn offClosed transparent activity, the first activity will only callback the Onresume () method.3 . Inventory Configuration for Activity If you want activity to be the portal for your application, you need to configure the activity's intent filter as follows:Android allows the program to have multiple activity as the portal of the application, as long as the activity i
Landing pageDeclare the intent object and start the Loginactivity ActivityIntent Intent = new Intent ();Intent.setclass (Loginactivity.this, Mainactivity.class);String Strusername=m_txtusername.gettext (). toString ();Intent.putextra ("UserName", strusername);//Transfer to main interfaceStartActivity (Intent);Deleting the current activity from the history stack will not return to the activity when the user taps the "back" button.Finish ();Main interfa
There are two ways to pass data between Fragment and activity, one is to use setargument and one is to use an interface callback. Learn the first method below.( 1 ) using setargument Method:for the sake of understanding, I am here to make a metaphor: if Act ivity is the emperor, it set up three departments (such as the three provinces six), respectively, is Fragment1,fragment2 and the Fragemnt3 ;now he's going to command the department . Fra Gment1 to
= Data.getstringextra ("Third"); LOG.D ("Firstactivity", data3); } Break; default: } }The above is the three cases of their own judgment, in fact, if only two activity, then only need a case to be able. It can be seen that in order to return the data successfully, it is necessary to match in case, then ResultCode also need to match successfully.It can be understood that: a letter sent and received, need the address on the env
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