Warum funktioniert mein WebView nicht?

Question

Nun, ich bin total ein Anfänger, ich habe versucht, etwas Übung für das Webview zu machen. Ich kann jedoch nicht finden, welches Problem es ist. Kann mir jemand helfen? Vielen Dank.

Hier meine Java-Klasse ist:

public class MainActivity extends AppCompatActivity { 
private Button button; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    button = (Button) findViewById(R.id.button1) 
    ; 
    Uri uri = Uri.parse("www.google.com"); 
    final Intent intent = new Intent(Intent.ACTION_VIEW,uri); 

    button.setOnClickListener(
      new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        startActivity(intent); 
       } 
      } 
    ); 
} 
} 

Und hier ist mein Manifest-Datei:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.example.jinyu.webview"> 
<uses-permission android:name="android.permission.INTERNET"/> 
<application 

    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <activity android:name=".MainActivity"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application> 

</manifest> 

Hier ist mein log:

4-16 22:52:03.234 23525-23525/com.example.jinyu.webview E/AndroidRuntime: FATAL EXCEPTION: main 
                     Process: com.example.jinyu.webview, PID: 23525 
                     android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=www.baidu.com } 
                      at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1798) 
                      at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512) 
                      at android.app.Activity.startActivityForResult(Activity.java:3930) 
                      at android.app.Activity.startActivityForResult(Activity.java:3890) 
                      at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:820) 
                      at android.app.Activity.startActivity(Activity.java:4213) 
                      at android.app.Activity.startActivity(Activity.java:4181) 
                      at com.example.jinyu.webview.MainActivity$1.onClick(MainActivity.java:29) 
                      at android.view.View.performClick(View.java:5204) 
                      at android.view.View$PerformClick.run(View.java:21153) 
                      at android.os.Handler.handleCallback(Handler.java:739) 
                      at android.os.Handler.dispatchMessage(Handler.java:95) 
                      at android.os.Looper.loop(Looper.java:148) 
                      at android.app.ActivityThread.main(ActivityThread.java:5417) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
04-16 22:52:04.687 23525-23525/com.example.jinyu.webview I/Process: Sending signal. PID: 23525 SIG: 9 

Answer 1

bearbeiten (für zukünftige Besucher): in http:// oder https:// vor der eigentlichen url.

Kürzester Weg, dies zu erreichen, ist

public class MainActivity extends AppCompatActivity { 
private Button button; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    button = (Button) findViewById(R.id.button1); 

    button.setOnClickListener(
      new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com"))); 
       } 
      } 
    ); 
} 
} 

Answer 2

"http://" oder "https://" zu Ihrer URL hinzufügen .