我尝试了很多解决方案，但模拟器仍然说，不幸的是，当我尝试打开 webview 时，应用程序已停止。
这是我的 Webviewactivity.java 代码：
package com.example.jpg;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class Webviewactivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
// Let's display the progress in the activity title bar, like the
// browser app does.
getWindow().requestFeature(Window.FEATURE_PROGRESS);
WebView webview = new WebView(this);
setContentView(webview);
webview.getSettings().setJavaScriptEnabled(true);
final Activity activity = this;
webview.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
// Activities and WebViews measure progress with different scales.
// The progress meter will automatically disappear when we reach 100%
activity.setProgress(progress * 1000);
}
});
webview.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
//Users will be notified in case there's an error (i.e. no internet connection)
Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
}
});
//This will load the webpage that we want to see
webview.loadUrl("http://www.google.com");
}
}
这是我的日志：
01-07 10:54:54.829: E/AndroidRuntime(940): FATAL EXCEPTION: main
01-07 10:54:54.829: E/AndroidRuntime(940): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.jpg/com.example.jpg.Webviewactivity}; have you declared this activity in your AndroidManifest.xml?
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1541)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1416)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivityForResult(Activity.java:3351)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivityForResult(Activity.java:3312)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivity(Activity.java:3522)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivity(Activity.java:3490)
01-07 10:54:54.829: E/AndroidRuntime(940): at com.example.jpg.MainActivity$1.onClick(MainActivity.java:32)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.view.View.performClick(View.java:4084)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.view.View$PerformClick.run(View.java:16966)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.os.Handler.handleCallback(Handler.java:615)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.os.Handler.dispatchMessage(Handler.java:92)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.os.Looper.loop(Looper.java:137)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-07 10:54:54.829: E/AndroidRuntime(940): at java.lang.reflect.Method.invokeNative(Native Method)
01-07 10:54:54.829: E/AndroidRuntime(940): at java.lang.reflect.Method.invoke(Method.java:511)
01-07 10:54:54.829: E/AndroidRuntime(940): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-07 10:54:54.829: E/AndroidRuntime(940): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-07 10:54:54.829: E/AndroidRuntime(940): at dalvik.system.NativeStart.main(Native Method)
01-07 10:54:57.249: I/Process(940): Sending signal. PID: 940 SIG: 9
01-07 10:54:54.829: E/AndroidRuntime(940): FATAL EXCEPTION: main
01-07 10:54:54.829: E/AndroidRuntime(940): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.jpg/com.example.jpg.Webviewactivity}; have you declared this activity in your AndroidManifest.xml?
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1541)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1416)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivityForResult(Activity.java:3351)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivityForResult(Activity.java:3312)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivity(Activity.java:3522)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.Activity.startActivity(Activity.java:3490)
01-07 10:54:54.829: E/AndroidRuntime(940): at com.example.jpg.MainActivity$1.onClick(MainActivity.java:32)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.view.View.performClick(View.java:4084)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.view.View$PerformClick.run(View.java:16966)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.os.Handler.handleCallback(Handler.java:615)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.os.Handler.dispatchMessage(Handler.java:92)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.os.Looper.loop(Looper.java:137)
01-07 10:54:54.829: E/AndroidRuntime(940): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-07 10:54:54.829: E/AndroidRuntime(940): at java.lang.reflect.Method.invokeNative(Native Method)
01-07 10:54:54.829: E/AndroidRuntime(940): at java.lang.reflect.Method.invoke(Method.java:511)
01-07 10:54:54.829: E/AndroidRuntime(940): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-07 10:54:54.829: E/AndroidRuntime(940): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-07 10:54:54.829: E/AndroidRuntime(940): at dalvik.system.NativeStart.main(Native Method)
01-07 10:54:57.249: I/Process(940): Sending signal. PID: 940 SIG: 9
请帮忙。我对此非常着急。谢谢你。