Nahea ia haapii i te faanahoraa Android

Mai te mea e, te hinaaro ra outou e haapii i te faanahoraa Android, Aita oe oe ana'e. I roto i te fa'ahou, E mea ohie roa ia haamata! Haamata na roto i te piha hautiraa Android, Te vahi faahoturaa tamoni ore a Google. E mea titau atoa outou i te rave'a no te faahoturaa i te Java. I muri iho, E nehenehe ta outou e haamata i te papa'i i ta outou mau faaohiparaa matamua. I te pae hopea, E haere outou i ni'a i te Intents, Java, Te mau piiraa no ni'a i te oraraa o te ohipa, e te tahi atu â!

To'o-e-to'e

Ua riro te faanahoraa i te mau faanahoraa Android ei rave'a ohie e te puai o te nehenehe e tauturu ia outou ia hamani i te mau faaohiparaa taa ê roa. Ma te rave'a no te hutiraa e te toparaa, e nehenehe ta outou e faata'i i te mau mea i roto i te faanahoraa ma te ore e haamǎta'u i te toea o te faanahoraa. E tonohia te mau ohipa drag i te feia e faaroo ra na roto i te hoê ohipa Android. I roto i te ohipa drag, te vai ra te mau haamaramaramaraa no ni'a i te huru o te tao'a e te vai ra te mau haamaramaramaraa mai te hoê taamuraa X-y. E farii te taata faaroo i te mau haamaramaramaraa e e pii oia i te rave'a getX() e aore râ, Y() to obtain the current position of the drag point. If the drag operation has been completed, the listener returns a boolean true or false.

Drag-and-drop Android app programming is possible with Eclipse 4.4 (Luna) and Java 1.7. To implement drag-and-drop, you need to add an OnTouchListener to your Activity. I muri iho, create a DragShadowBuilder that specifies the picture to be displayed during drag operation.

Drag-and-drop Android app programming involves using drag event classes and drag listeners. Drag events begin with a user trigger. I muri iho, the app provides a startDragAndDrop() callback. If the drag event listener returns false, the system won’t call the callback method. The DragEvent class is similar to onTouchEvent.

You can alter the behavior of a drag-and-drop event by overriding the onProvideShadowMetrics method. This method returns information regarding the size and touch point of the drag event. You can also modify the drag-and-drop gesture by overriding the onDrawShadow method.

Drag-and-drop Android app programming is a simple and flexible technique that lets you build high-quality mobile applications. Na roto i te drag-and-drop, you can also trigger system events when users perform drag and drop actions.

Te mau mana'o

Intents are used to communicate between different components in an Android app. An Android application can support both explicit and implicit intents, which are used to control the flow of data from one application to another. An example of this would be a browser window that redirects a user to another application when they open it.

E nehenehe te mau opuaraa e riro ei numera hoê aore ra ei aho, e no te faatupu i te tahi atu mau ohipa i roto i te hoê faanahoraa. Taa ê noa'tu i te faatupu i te tahi atu mau tuhaa o te hoê faanahoraa, E nehenehe atoa e faaohipa i te mau opuaraa no te taui i te mau ohipa i roto i te hoê faanahoraa. Te faufaa rahi, o te faaohiparaa ïa i te reira ma te paari. Ia rave ana'e outou i te ohipa ma te mau opuaraa, e ti'a ia outou ia ape i te mau haamaramaramaraa e nehenehe e faanahohia e aore râ, e nehenehe e faaohipahia.

Ei hi'oraa, E nehenehe ta outou e faaohipa i te hoê ana'e aho no te faaite i te mau haamaramaramaraa i te hoê taata faaohipa. I muri iho, no te hi'o i te mau haamaramaramaraa no nia i te moni o te tao'a, e nehenehe ta ratou e patoi i nia i te tuhaa faaroo. I muri iho, e faaite te faanahoraa i teie mau haamaramaramaraa i roto i te hoê hi'oraa tabula. E nehenehe atoa teie faanahoraa e faaapîhia na roto i te faatiaraa i te feia e faaohipa ra ia ma'iti i te tao'a e hinaarohia ra. I muri iho, e faaite mai te reira i te hoê tabula o te mau tao'a ia au i ta ratou mau titauraa i maitihia, e tae noa'tu i te mau hooraa atoa e te mau faaueraa hooraa.

E rave rahi mau matapihi i roto i te mau faanahoraa Android. Eaha, E mea ti'a i te feia faaohipa ia taui i rotopu i te mau faaohiparaa no te mau tumu e rave rahi. To accomplish this, they use the Intent mechanismu. Intents are used to connect activities within the same app, as well as between apps. To switch between apps, you should create a new intent object and use a suitable Android method.

Intents allow Android apps to provide functionality similar to the web. To do this, Android apps can implement an intent filter for web links. This means that links that point to web sites will open the Android app instead of a web page. Taa ê noa'tu i te reira, Android 12 introduced generic web intents, which are used to open the user’s default browser app.

Te mau piiraa no ni'a i te oraraa o te ohipa

When you write code in Android apps, you might often come across Activity Lifecycle Callbacks. These callbacks let you know when your app should be closed, restarted, or reverted to the previous state. Aua'e râ, E nehenehe teie mau piiraa e faaohipahia i roto i te mau ohipa e te mau tuhaa.

E toru huru ohipa no te oraraa. Te matamua, i ni'a i te Tīmata(), I te mau taime atoa e itehia ' i te hoê ohipa i nia i te mata. Te piti o te, i ni'a Ho'i faahou(), ia ho'i mai te hoê ohipa i muri a'e i te tapearaahia. E piiraa faufaa roa teie no te mau faanahoraa Android atoa no te mea e nehenehe te reira e tapea i ta outou faanahoraa ia ore ia roa.

No te rave i teie mau piiraa, e ti'a ia outou ia maramarama i te Android API. E rave rahi taime to te faanahoraa faaohiparaa i te mau ravea onStart e onStop. To'na auraa ra, e nehenehe ta outou faanahoraa e pii i te rave'a onStart e rave rahi taime. E faatupu te reira i ta outou ohipa ia itehia e ia hunahia. E ti'a atoa ia outou ia ite i te taime e ino ai te ohipa na roto i te hi'oraa i te mau poroi logcat.

No te tauaparauraa a te taata faaohipa, e faatupu te OS i te mau niuniu onCreate e onDestroy. E nehenehe atoa te feia hamani e faaore i te mau piiraa. Tera râ,, ia faaore ana'e outou i te mau piiraa, E mea ti'a i te feia hamani ia faaohipa tamau i te rave'a no te piha haapiiraa. Ia ore te reira ia rave i te reira, e nehenehe te faanahoraa e ohipa i roto i te hoê huru huru ê aore ra e topa.

Te tauturu nei te mau piiraa no ni'a i te oraraa ia outou ia taa i te taime e ti'a ai ia outou ia tomo i roto i te hoê huru tape'araa aore ra tape'araa. Eiaha outou e rave i te mau roro uira rahi i roto i teie taime, no te mea e nehenehe te reira e faataime i te tauiraa i te huru i muri iho e e faaore i te ite o te taata faaohipa.

Te papa'iraa

E nehenehe te mau faaohiparaa Android e riro ei mauhaa faufaa roa no te feia hamani. E faaohipa te Android i te hoê faanahoraa no te tapea i te mau poroi buka, o te nehenehe e hi'opoahia e te pǔpǔ aore ra te mea faufaa roa ' ' e. E nehenehe ta outou e faataa i te mau poroi na roto i te papairaa i te mau faahitiraa parau tataitahi o te tano i te ohipa a ta outou faanahoraa. E rave rahi mau ravea no te papa'i e no te hi'opo'a i te mau faahitiraa parau.

Te hoê o te mau rave'a mâmâ roa a'e no te tomo, o te faaohiparaa ïa i te hoê piha haapiiraa Log. E farii te mau ravea papairaa e piti aore ra e toru mana'o. E piti mana'o i roto i te rahiraa o te mau poroi buka. E mea ti'a ia riro te mau tautohe ei huru String. E mea iti roa teie huru papairaa raau, tera râ, e mauhaa faufaa te reira no te mau opuaraa e rave rahi.

Ua riro te faaohiparaa i te mau faanahoraa Android ei rave'a matarohia e te feia hamani. I te rahiraa o te taime, I te mau taime atoa e tupu ai te mau ohipa o te oraraa, e ti'a i te hoê faanahoraa Android ia papa'i. Mai te mea e, e titauhia te hoê fifi i roto i te faaohiparaa, e ti'a ia'na ia papa'i i te mau haamaramaramaraa o te tauturu i te feia hamani i te faanahoraa. E nehenehe atoa ta outou e papa'i i te mau haamaramaramaraa no ni'a i te hape ma te faaohipa i te Log.d() āna'ana. E nehenehe atoa te ravea hopea e papai i te mau faufaa taa ê e e nenei i te mau poroi.

Noa ' tu e mea tauturu te faaoreraa i te mau hape i roto i te mau hape, E nehenehe te raveraa i te ohipa e faaiti i te aravihi. Te rave'a maitai roa a'e, o te faaohiparaa ïa i te mau papa'iraa debug no te faahoturaa ana'e, e a tatara i te papa'iraa verbose hou a nene'i ai i ta outou parau aniraa. Ei taata hamani, E mea ti'a ia outou ia hi'opo'a tamau i te mau faahopearaa hou a nene'i ai i te reira. E tae mai te Android SDK e te hoê piha haapiiraa papa'iraa buka. E papa'i te reira i te mau haamaramaramaraa o te faanahoraa i roto i te hoê buka faahororaa tei piihia LogCat. Tera râ,, E fifi to teie ravea, no reira, e tia ia faaohipa - noa - hia te reira ia titauhia.

E nehenehe atoa outou e hi'o i te mau buka faahororaa o te faanahoraa i roto i te Android. I roto i teie mau buka aamu, te vai ra te mau haamaramaramaraa no nia i te mau mea atoa, mai te mau ohipa hi'opoaraa e tae roa ' tu i te vahi e te mau buka aamu. Na roto i te tauturu a te hoê rave'a mai te Android Studio, e nehenehe ta outou e hi'opo'a i te mau faahopearaa o te buka faahororaa.