alterações

app/src/main/java/com/example/api/MainActivity.kt

@@ -4,23 +4,11 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
-import androidx.compose.material3.Button
-import androidx.compose.material3.CircularProgressIndicator
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Text
-import androidx.compose.material3.TopAppBar
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.collectAsState
-import androidx.compose.runtime.getValue
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
@@ -47,33 +35,53 @@ fun CharacterScreen(viewModel: CharacterViewModel = viewModel()) {
     val characters by viewModel.characters.collectAsState()
     val isLoading by viewModel.isLoading.collectAsState()
     val error by viewModel.error.collectAsState()
+    val searchQuery by viewModel.searchQuery.collectAsState()
 
     Scaffold(
         topBar = {
-            TopAppBar(title = { Text("Rick and Morty Characters") })
+            TopAppBar(title = { Text("Rick and Morty Finder") })
         }
     ) { innerPadding ->
-        Box(
+        Column(
             modifier = Modifier
                 .fillMaxSize()
                 .padding(innerPadding)
         ) {
+            // Barra de Busca - Isso faz o app "fazer alguma coisa" interativa
+            OutlinedTextField(
+                value = searchQuery,
+                onValueChange = { viewModel.onSearchQueryChange(it) },
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(8.dp),
+                placeholder = { Text("Pesquisar personagem (ex: Rick, Morty...)") },
+                label = { Text("Buscar por Nome") },
+                singleLine = true
+            )
+
+            Box(modifier = Modifier.weight(1f)) {
                 when {
-                isLoading -> {
+                    isLoading && characters.isEmpty() -> {
                         CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
                     }
-                error != null -> {
+                    error != null && characters.isEmpty() -> {
                         Column(
                             modifier = Modifier.align(Alignment.Center),
                             horizontalAlignment = Alignment.CenterHorizontally
                         ) {
                             Text(text = error ?: "Erro desconhecido")
-                        Spacer(modifier = Modifier.height(8.dp))
-                        Button(onClick = { viewModel.fetchCharacters() }) {
+                            Spacer(modifier = Modifier.height(16.dp))
+                            Button(onClick = { viewModel.fetchCharacters(searchQuery) }) {
                                 Text("Tentar novamente")
                             }
                         }
                     }
+                    characters.isEmpty() && !isLoading -> {
+                        Text(
+                            text = "Nenhum resultado encontrado.",
+                            modifier = Modifier.align(Alignment.Center)
+                        )
+                    }
                     else -> {
                         LazyColumn {
                             items(characters) { character ->
@@ -85,3 +93,4 @@ fun CharacterScreen(viewModel: CharacterViewModel = viewModel()) {
             }
         }
     }
+}

app/src/main/java/com/example/api/network/RickAndMortyService.kt

@@ -2,8 +2,12 @@ package com.example.api.network
 
 import com.example.api.model.CharacterResponse
 import retrofit2.http.GET
+import retrofit2.http.Query
 
 interface RickAndMortyService {
     @GET("character")
-    suspend fun getCharacters(): CharacterResponse
+    suspend fun getCharacters(
+        @Query("page") page: Int? = null,
+        @Query("name") name: String? = null
+    ): CharacterResponse
 }

app/src/main/java/com/example/api/viewmodel/CharacterViewModel.kt

@@ -18,19 +18,28 @@ class CharacterViewModel : ViewModel() {
     private val _error = MutableStateFlow<String?>(null)
     val error: StateFlow<String?> = _error
 
+    private val _searchQuery = MutableStateFlow("")
+    val searchQuery: StateFlow<String> = _searchQuery
+
     init {
         fetchCharacters()
     }
 
-    fun fetchCharacters() {
+    fun onSearchQueryChange(query: String) {
+        _searchQuery.value = query
+        fetchCharacters(query)
+    }
+
+    fun fetchCharacters(name: String? = null) {
         viewModelScope.launch {
             _isLoading.value = true
             _error.value = null
             try {
-                val response = RetrofitClient.apiService.getCharacters()
+                val response = RetrofitClient.apiService.getCharacters(name = name)
                 _characters.value = response.results
             } catch (e: Exception) {
-                _error.value = "Erro ao carregar personagens: ${e.localizedMessage}"
+                _characters.value = emptyList()
+                _error.value = if (name != null) "Nenhum personagem encontrado com esse nome." else "Erro ao carregar personagens."
             } finally {
                 _isLoading.value = false
             }