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I’m developing my first app Android, using java and I’m having a hard time calling a Activity through the Webview.
In the Activity that appears first, it contains only one Webview that will load a php containing the login of the system.
I’m trying to make sure that by clicking the login button, which is on php, will be checked if the login is valid and if it is, after verification that the user exists, it calls the next Activity.
When searching on Google, it appears to me that I would have to create a JavascriptInterface. I have already tried to do this interface but the startActivity command seems to be skipped.
Elsewhere, I found a speaking user who should be used startActivityForResult, as it is asynchronous, but I could not implement.
Below are the codes I’m using:
Activityinicial:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inicial);
webViewObj2 = findViewById(R.id.webViewInicial);
webViewObj2.setWebViewClient(new WebViewClient()) ;
webViewObj2.getSettings().setJavaScriptEnabled(true);
webViewObj2.getSettings().setLoadWithOverviewMode(true);
webViewObj2.getSettings().setUseWideViewPort(true);
webViewObj2.addJavascriptInterface(new WebAppInterface(this), "novaActivity");
webViewObj2.loadUrl("http://localhost/Arquivar/index.php");
}
@JavascriptInterface
public void abrirOutraActivity()
{
Intent intent = new Intent(this, MainActivity.class); //durante o debug, chega até essa linha
startActivity(intent); //mas não executa essa
}
index php.:
<?php
session_start();
?>
<html>
<body>
<section>
<div>
<?php
if(isset($_SESSION['nao_autenticado'])):
?>
<div>
<p>ERRO: Usuário ou senha inválidos.</p>
</div>
<?php
endif;
unset($_SESSION['nao_autenticado']);
?>
<div>
<form action="login.php" method="POST">
<input name="usuario" name="text" placeholder="Seu usuário" autofocus="">
<input name="senha" type="password" placeholder="Sua senha">
<button type="submit">Entrar</button>
</form>
</div>
</div>
</section>
</body>
</html>
login.php:
<?php
session_start();
include('conexao.php');
if(empty($_POST['usuario']) || empty($_POST['senha'])) {
header('Location: index.php');
exit();
}
$usuario = mysqli_real_escape_string($conexao, $_POST['usuario']);
$senha = mysqli_real_escape_string($conexao, $_POST['senha']);
$query = "query de busca do usuário";
$result = mysqli_query($conexao, $query);
$row = mysqli_num_rows($result);
if($row == 1) {
$_SESSION['usuario'] = $usuario;?>
<html>
<head></head>
<body>
<script>
novaActivity.abrirOutraActivity(); //o método se encontra no ActivityInicial.java
</script>
</body>
</html>
<?php
} else {
$_SESSION['nao_autenticado'] = true;
header('Location: index.php');
exit();
}
?>
Androidmanifest:
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="Patrimônio"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".ActivityInicial">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Main2Activity"
android:label="@string/title_activity_main2"
android:parentActivityName=".ActivityInicial"
android:theme="@style/AppTheme.NoActionBar"></activity>
<activity
android:name=".MainActivity"
android:parentActivityName=".Main2Activity"></activity>
</application>
Main2activity: (A Activity that should be opened)
public class Main2Activity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
Toolbar toolbar = findViewById(R.id.toolBarCabecalho);
setSupportActionBar(toolbar);
}
}