54 lines
1.3 KiB
Kotlin
54 lines
1.3 KiB
Kotlin
package com.example.android_programming
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import android.os.Bundle
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import androidx.activity.ComponentActivity
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import androidx.activity.compose.setContent
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.runtime.Composable
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import androidx.compose.ui.Modifier
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import com.example.android_programming.composeui.Header.Header
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import com.example.android_programming.composeui.Navigation.Navigate
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import com.example.android_programming.model.User
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class MainActivity : ComponentActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContent {
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MainContent()
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}
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}
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}
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@Composable
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fun MainContent() {
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Column(
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modifier = Modifier.fillMaxSize()
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) {
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Header()
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Navigate()
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}
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}
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class GlobalUser private constructor() {
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private var user: User? = null
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fun setUser(user: User?) {
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this.user = user
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}
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fun getUser(): User? {
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return user
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}
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companion object {
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private var instance: GlobalUser? = null
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fun getInstance(): GlobalUser {
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return instance ?: synchronized(this) {
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instance ?: GlobalUser().also { instance = it }
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}
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}
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}
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} |