Founga ke langa ai 'a e Android Apps .

Te ke lava ʻo tānaki atu ha ngaahi polokalama kehekehe ki hoʻo meʻangāue Android .. 'Oku fa'a ma'u 'a e ngaahi polokalama ko 'eni 'i he app tu'asila pe peesi 'uluaki ., pea 'oku nau kehekehe 'o fakatatau ki he Android version .. 'E uesia 'e he ngaahi polokalama ko 'eni ho'o mo'ui 'a e 'uhila mo e fakahoko .. Te ke lava foki ʻo fokotuʻu ha ngaahi polokalama ki hoʻo meʻangāue TV Android .. Hili hono fokotu'u 'o e polokalama ., ‘e ‘asi mai ia ‘i he screen ‘o e ‘api ‘o ho‘o me‘angāué ..

Ngaahi ngāue

Ko e ngaahi ngaue ko e ngaahi poloka langa tefito ia 'o ha Android app .. 'Oku fakamatala'i 'e he ngaahi konga ko 'eni 'a e app 'o e 'atakai mo e tisaini UI .. Ko ha Android app 'oku 'ikai ko ha a'usia 'e taha ., ka ko ha ngaahi ngāue hokohoko ‘e lava ke hū ki ai ha tokotaha ‘oku ne ngāue‘aki ‘i he loto .. 'Oku fa'a fakakaukau 'a e tokotaha tisaini UI ki ha app ko ha seti 'o e ngaahi screen ., ʻoku takitaha mapeʻi ki ha ʻekitivitī .. Hili hono fakakakato 'e ha tokotaha ngaue 'a e 'ekitiviti 'e taha ., 'oku kamata 'e he app 'a e taha hoko ..

‘Oku tokoni ‘a e ngaahi ngāue ki he app fetu‘utaki mo e sisitemi ngāué pea tauhi ‘a e me‘a ‘oku lolotonga ‘i he screen .. ʻIkai ngata ai, ‘oku nau tokoni ke fakafoki mai ha tu‘unga ki mu‘a .. Ko e lahi taha 'o e ngaahi polokalama 'oku 'i ai 'a e ngaahi ngaue lahi .. ʻOku puleʻi ʻe he ʻekitivitī takitaha ʻa e ngaahi screen kehekehe pea ʻoku kehekehe ia ʻi he faingataʻá .. Ko e siakale moʻui ʻo ha ʻekitivitī ʻoku tatau ia mo ha uepisaiti ..

'Oku ui 'a e ngaahi ngaue 'e he sisitemi Android 'i he 'uluaki sitepu 'o e fakahoko 'o e app .. 'Oku ui 'e he sisitemi onSart .() pea onStop() ngaahi founga tuʻo lahi ʻi he lolotonga ʻo e moʻui ʻo ha ʻekitivitī .. 'Oku mahu'inga 'a e founga ko 'eni ke fakapapau'i 'oku ma'u 'e he app ha a'usia 'o e tokotaha faka'aonga'i tu'uma'u .. ‘Oku toe muimui‘i ‘e he sisitemí ‘a e taimi kuo ‘osi ai ha ‘ekitivitī pea ‘oku fiema‘u ke toe fakatupu .. Ko ha founga lelei ko e ui onCreate .() ʻi he taimi ʻoku faʻu ai ha ʻekitivitī ..

Ko e ngaahi ngaue ko ha konga mahu'inga ia 'o e Android apps .. 'Oku nau fakafofonga'i 'a e uho 'o e sipinga 'o e tohi kole .. 'Oku kamata 'a e ngaahi ngaue 'e he sisitemi Android 'aki hono ui 'o e ngaahi founga callback 'oku fe'unga mo e ngaahi konga kehekehe 'i he mo'ui 'a e 'ekitiviti .. 'Oku fakamatala'i 'e he ngaahi tohi Android 'a e fakakaukau 'o e ngaahi ngaue pea 'oku ne 'oatu 'a e fakahinohino ma'ama'a ki he founga ke ngaue fakataha mo kinautolu .. 'Oku 'omi 'e he konga ko 'eni ha vakai fakalukufua ki he ngaahi fa'ahinga kehekehe 'o e ngaahi ngaue mo e founga 'oku nau fekau'aki mo e ngaahi polokalama 'o e mamani mo'oni .. ʻIkai ngata ai, te ke lava ʻo ako ʻa e founga ke ngaohi ʻaki ʻa e ngaahi ʻekitivitií ʻaki hono lau ʻa e Fakahinohino ki he Fakatupulaki ʻo e Android ..

‘Oku fakahā ‘a e ngaahi ngāue ‘i he fakahā ‘o e app .. Ke lava ʻo faʻu ha ʻekitivitī ʻi ha polokalama Android ., kuo pau ke ke tānaki atu ha ʻulungaanga pau ki he manió .. ʻOku fakapapauʻi ʻe he ʻulungaanga ko ʻení ʻa e hingoa ʻo e kalasi ʻekitivitií ʻo fakatatau ki he kato app .. Kapau te ke liliu 'a e 'ulungaanga ko 'eni ., 'e 'ikai ke ngaue kakato 'a e app ..

Views

Views are the most basic elements of the user interface of an Android app. They provide rectangular space for the display of text and other graphical contents and can handle various events. The Android platform provides many different subclasses for views, including TextView, ViewGroup, and ImageView. Each view has its own set of attributes, which define how it will behave and be used in the application.

The Layout defines the structure of your application and holds many view elements. It can be styled by adjusting its parameters. Layouts in Android are organized using XML language. There are several different types of layouts. Linear Layout is used to align items in a linear fashion.

Layout specifies how to arrange the child views relative to each other. Constraint layouts are more complex than linear layouts, but are more flexible and faster for more complex UIs. Constraint layouts also provide a flatter view hierarchy, which means less processing at runtime. They’re also designed for use with the Android Studio design editor. With the layout, users drag and drop the GUI components on the blueprint tool, and then specify instructions on how to display them.

In Android, each activity contains multiple UI components that belong to the View and ViewGroup classes. These UI elements represent a rectangular area on the screen and are responsible for displaying the content. They can be used in conjunction with other elements to create a more complex application. And as you continue working with the Android development environment, you’ll find out more about these basic Android components.

Alternative resources

An Android application can supply different types of resources, depending on the device’s UI language and layout. Although the Android SDK does not expose methods for specifying different resource sets, you can use the settings panel to set the appropriate resource set for the device you’re developing for. Hangē ko ʻení, you can use different layout resources to take advantage of available screen space, or use different string resources to translate the text in the user interface.

Alternative resources are aliases for default resources. It is important to provide default resources to prevent your app from crashing when it’s being used in an unanticipated configuration. This happens when new versions of Android add configuration qualifiers that older versions of Android do not support. If your app does not provide default resources, it will cause the device to crash.

While Android apps should provide default resources, it’s recommended to provide alternative resources for specific device configurations. Hangē ko ʻení, minSdkVersion 4+ apps do not require default drawable resources. ʻIkai ngata ai, Android can choose the best-matching alternative resource directory based on the configuration of the device. Pea, it can scale bitmaps as needed.

If the system doesn’t find a suitable resource, it will select a resource with the most suitable size. This means that your application must be able to handle smaller screens than expected. Ko ia ai, it is better to use resources with both dimensions. Ko e foungá ni, you can localize your application for specific devices and screen resolutions.

Content providers

Content providers are needed for Android applications to access a database. They are a central repository for data and provide an interface for data exchange between applications. Content providers are also necessary for Android’s messaging application. A Content Provider is registered in the activity file with a provider tag. To register your content provider, follow the steps below: * Select the minimal SDK. * Add a content provider tag to your application.

ContentProviders can access data resources that your application needs, such as the user dictionary. They need permission for read and write. This permission can be obtained from the android.permission.readPermission() founga. ContentProviders also interact with the client, handling security, and inter-process communication.

The most common use of Content Providers is to store data for other applications. The content provider acts as a relational database and allows your applications to securely access the data. The content provider can also modify data according to the user’s requirements. The Android system allows the content provider to manage application data in several ways, depending on its needs.

Content providers are a key part of Android development. The framework has a comprehensive content provider library that can help you manage the data you have on your device. This library lets you centralize your data in one place. A good example of this is contacts, which are stored in a ContactProvider application. Pea, other applications can access them using the ContactProvider’s interface. The interface of ContactProvider includes methods to insert, update, delete, and query. Content providers are also used internally by Android. Bookmarks are also content providers for the system. Fakaʻosi, all media in the system is registered with a MediaStore content provider.

The Content Provider can be configured to have a particular URI address. This URI is used to access the content. It can also specify the type of data and permissions. The Content Provider can also be configured to allow data export.

Permission system

The permission system on Android devices is an important part of protecting your device. It can restrict the type of apps you install and what they can access. Te ke lava foki ʻo fakaʻaongaʻi ʻa e sisitemi fakangofua ke maluʻi hoʻo fakapulipulí .. Tokanga ki he ngaahi apps 'oku nau kole ke fu'u lahi 'a e 'alunga .. Ko e me’a faka’osi ‘oku ke fiema’u ke ‘oange kiate kinautolu ‘a e hū ki he maikolofoni ‘a ho’o telefoni ..

‘Oku fakakalasi ‘e he sisitemi fakangofua ‘a Android ‘a e ngaahi polokalama ‘o fakatatau ki he’enau tu’unga malu .. Te ke lava ʻo fili ʻi he vahaʻa ʻo e ongo faʻahinga ngofua tefito .: ngaahi ngofua angamaheni mo e ngaahi ngofua fakamo'oni hingoa. Ko e kehekehe ko e lahi ia 'o e me'a 'e lava ke fai 'e ha app pea 'oku 'alu ki tu'a 'i he sandbox .. Apps mo e ngaahi ngofua angamaheni 'oku ne 'omi 'a e ngaahi fakatu'utamaki si'isi'i taha ki he fakapulipuli 'o e tokotaha faka'aonga'i pea ki he ngaahi polokalama kehe .. 'Oku nau foaki 'otometiki 'a e ngaahi ngofua 'e ni'ihi ., lolotonga ia ʻoku fie maʻu ke kole ʻe he ngaahi polokalama ʻa e paati hono tolú ʻa e niʻihi kehé ..

Apps mo e ngaahi ngofua fakatu'utamaki 'e lava ke sipai 'i ho'o ngaahi fekau fakafo'ituitui ., totongi koe ki he ngaahi sevesi ta'e fiema'u ., pea spam ho'o inbox .. Te ke lava ʻo puleʻi ʻa e ngaahi fakangofua ʻe lava ke kole ʻe ha app pau mei hoʻo telefoní ʻaki hono fakaʻatā ia ke ne maʻu ha ngaahi feituʻu tauhiʻanga pau .. Hangē ko ʻení, 'e lava ke ma'u 'e he ngaahi polokalama 'o e mūsika ho'o kaati SD ke fakahaofi 'a e ngaahi hiva kuo download ., lolotonga ia 'e lava ke ma'u 'e he ngaahi polokalama fetu'utaki fakasosiale ho'o ngaahi fetu'utaki .. 'E lava ke ma'u 'e he ngaahi polokalama fakatata 'a e 'alunga ki ho feitu'u mo ho'o fakamatala mo'ui lelei ..

'Oku 'omi 'e he sisitemi fakangofua 'o e Android ha founga streamlined ke pule'i 'a e fakamatala 'oku tanaki mo vahevahe 'e ho'o apps .. Ki mu‘a ke download ha polokalama ., 'e lava ke ke vakai'i 'ene ngaahi ngofua 'i he falekoloa Google Play pea fili pe ko e fē 'oku ke falala ki ai .. Ko e ngaahi app pe ko ia 'oku 'i ai 'a e ngaahi ngofua totonu 'e lava ke falala'anga 'e he kau faka'aonga'i .. 'Oku mahu'inga ke nofo fakafo'ituitui ho'o fakamatala ., ko ia fakapapau’i ‘oku ke ‘ilo’i ‘a e me’a ‘oku ke ‘oatu ‘a e ngofua ke ..