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要到AndroidManifest.xml加入網路權限才可以使用喔 <uses-permission android:name="android.permission.INTERNET"/> 示範 XML xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/layout" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentBottom="true" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" > <WebView android:id="@+id/wv" android:layout_width="301dp" android:layout_height="360dp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> android.support.constraint.ConstraintLayout> JAVA public class MainActivity extends AppCompatActivity { WebView wv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); wv= (WebView)findViewById(R.id.wv); wv.getSettings().setBuiltInZoomControls(true); wv.getSettings().setJavaScriptEnabled(true); wv.setWebViewClient(new WebViewClient()); wv.loadUrl("http://google.com"); } public void onBackPressed() { if (wv.canGoBack()) { wv.goBack(); return; } super.onBackPressed(); } } 展示 相關文章: [Android] Android 程式設計教學