Android Studio开发启动打开网页应用遇Error <identifier> expected报错求助

Hey there! Let's sort out that "Error expected" error you're seeing. There are a couple of straightforward issues with your code structure and some typos that are causing this problem. Here's what's wrong and how to fix it:

Key Issues: #

• Code placement: You've put your variable declarations and WebView logic directly in the class body, not inside a method (like onCreate). In Java, executable code and variable initializations (that aren't class-level members) need to live inside a method.
• Case sensitivity typos: Java is case-sensitive, so:
  • string should be String (the Java string class is capitalized)
  • Webview should be WebView (Android's WebView class uses camel case with a capital V)
  • getsettings() should be getSettings() (method names follow camel case too)

Corrected Code: #

package com.cryptocrea.sitr;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebView; // Don't forget to import WebView!

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Move all your WebView logic inside onCreate
        String url = "http://cryptocrea.com/"; // Fixed capitalization and variable name typo
        WebView view = (WebView) this.findViewById(R.id.webview);
        
        // Uncomment and fix the method name if you need JavaScript enabled
        view.getSettings().setJavaScriptEnabled(true);
        
        view.loadUrl(url);
    }
}

Additional Notes: #

• Make sure you've added the INTERNET permission to your AndroidManifest.xml (required to load web pages):

  <uses-permission android:name="android.permission.INTERNET" />
  

• Double-check that your activity_main.xml layout actually contains a WebView with the id webview, otherwise findViewById will return null and cause a crash.

内容的提问来源于stack exchange，提问作者Christian Frandsen