package com.yinuo.safetywatcher import android.os.Bundle import android.widget.Toast import androidx.activity.ComponentActivity import androidx.activity.OnBackPressedCallback import androidx.activity.compose.setContent import androidx.compose.foundation.layout.fillMaxSize import androidx.compose.material3.MaterialTheme import androidx.compose.material3.Surface import androidx.compose.ui.Modifier import androidx.lifecycle.viewmodel.compose.viewModel import androidx.navigation.compose.rememberNavController import com.yinuo.safetywatcher.navi.NavigationUtil import com.yinuo.safetywatcher.navi.NavigationView import com.yinuo.safetywatcher.ui.SplashView import com.yinuo.safetywatcher.ui.theme.EasypusherTheme class MainActivity : ComponentActivity() { var exitTime = 0L override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContent { EasypusherTheme { // A surface container using the 'background' color from the theme Surface( modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background ) { val viewModel: MainViewModel = viewModel() if (viewModel.isSplash) { SplashView { viewModel.isSplash = false } } else { NavigationUtil.navHostController = rememberNavController() NavigationView() } } } } addBackListener() } private fun addBackListener() { onBackPressedDispatcher.addCallback(object : OnBackPressedCallback(true) { override fun handleOnBackPressed() { //是主页 if (System.currentTimeMillis() - exitTime > 2000) { Toast.makeText(this@MainActivity, "再点一次退出!", Toast.LENGTH_SHORT) .show() exitTime = System.currentTimeMillis() } else { finish() overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out) } } }) } }