I have an rss app that opens the url in a webView at the beginning it loaded very well then it started to close

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I have an rss app that opens the url in a webView at the beginning it loaded very well then it started to close

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 @Override
    protected void onCreate(Bundle savedInstanceState) {
        webView1.getSettings().setJavaScriptEnabled(true);
        webView1.getSettings().setBuiltInZoomControls(false);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);
        webView1 = findViewById(R.id.webvi);
        Bundle bundle = getIntent().getExtras();
        webView1.loadUrl(bundle.getString("url"));

    }

FATAL EXCEPTION: main Process: com.example.ariel.rss, PID: 10355 java.lang.RuntimeException: Unable to start activity ComponentInfo {com.example.ariel.rss / com.example.ariel.rss.WebView}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.webkit.WebSettings android.webkit.WebView.getSettings ()' on a null object reference at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2659) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2724) at android.app.ActivityThread.-wrap12 (ActivityThread.java) at android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1473) at android.os.Handler.dispatchMessage (Handler.java:102) at android.os.Looper.loop (Looper.java:154) at android.app.ActivityThread.main (ActivityThread.java:6123) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:867) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:757) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.webkit.WebSettings android.webkit.WebView.getSettings () 'on a null object reference at com.example.ariel.rss.WebView.onCreate (WebView.java:13) at android.app.Activity.performCreate (Activity.java:6672) at android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1140) at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2612) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2724) at android.app.ActivityThread.-wrap12 (ActivityThread.java) at android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1473) at android.os.Handler.dispatchMessage (Handler.java:102) at android.os.Looper.loop (Looper.java:154) at android.app.ActivityThread.main (ActivityThread.java:6123) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:867) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:757)

android-studio

asked by arglez35 29.11.2017 в 07:08

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1 answer

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score 0 · Accepted Answer

If you set these using the WebView methods before instantiating it. That is the origin of the error, since you use the WebView methods before creating it. And even, not only are you using them before instantiating the WebView if not before inflating the layout of the activity. The methods super() and setContentView() must be the first two methods of onCreate() .

To correct the problem, instantiate the WebView before using its methods. As follows:

@Override 
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_web_view); // Inflas el layout de la actividad

    webView1 = findViewById(R.id.webvi); // Instancias el WebView

    webView1.getSettings().setJavaScriptEnabled(true); 
    webView1.getSettings().setBuiltInZoomControls(false);   

    Bundle bundle = getIntent().getExtras(); 
    webView1.loadUrl(bundle.getString("url"));
}