How to start activity when a link is clicked in webview?

Question

I am developing an android app, which has a webview. I followed this tutorial but my Activity is still not starting from web view.How do i start activity? Here is my code

    public class MainActivity extends ActionBarActivity {

    WebView mWebView;
    ProgressBar progressBar;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Bundle extras=getIntent().getExtras();

        mWebView = (WebView) findViewById(R.id.webView1);
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.getSettings().setAllowFileAccess(true);
        mWebView.setWebViewClient(new MyWebViewClient());
        mWebView.setWebViewClient(new WebViewClient() {



            @Override
            public void onPageFinished(WebView view, String url) {
                //hide loading image
                findViewById(R.id.imageLoading1).setVisibility(View.GONE);
                //show webview
                findViewById(R.id.webView1).setVisibility(View.VISIBLE);
            }




        });
        mWebView.loadUrl("http://fashion.example.com/my-account/");
    }



    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (url.equals("http://fashion.example.com/my-account/lost-password/")) {
                Intent intent = new Intent(MainActivity.this, MainActivity2.class);
                startActivity(intent);
                return false;
            }else{
                view.loadUrl(url);
                return true;
            }
        }

  }
}

my xml file

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/vert_loading"
    tools:context="com.apks.mumbaifashion.MainActivity" >

        <ImageView android:id="@+id/imageLoading1"
        android:layout_width="match_parent"
    android:layout_height="match_parent"
        />

    <ProgressBar
            android:id="@+id/progressbar"
            android:layout_width="40dp"
            style="?android:attr/progressBarStyleLarge"
            android:layout_height="40dp"
            android:layout_centerInParent="true" 
            android:visibility="visible"
            android:progressDrawable="@drawable/progress"/>

    <WebView android:id="@+id/webView1"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        android:visibility="gone"
        />

</RelativeLayout>

Logcat

08-06 03:23:03.853: D/AndroidRuntime(1168): Shutting down VM
08-06 03:23:03.853: W/dalvikvm(1168): threadid=1: thread exiting with uncaught exception (group=0xb2aadba8)
08-06 03:23:03.893: E/AndroidRuntime(1168): FATAL EXCEPTION: main
08-06 03:23:03.893: E/AndroidRuntime(1168): Process: com.apks.mumbaifashion, PID: 1168
08-06 03:23:03.893: E/AndroidRuntime(1168): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.apks.mumbaifashion/com.apks.mumbaifashion.MainActivity2}: java.lang.ClassCastException: com.apks.mumbaifashion.MainActivity2 cannot be cast to android.app.Activity
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.app.ActivityThread.access$800(ActivityThread.java:135)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.os.Handler.dispatchMessage(Handler.java:102)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.os.Looper.loop(Looper.java:136)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.app.ActivityThread.main(ActivityThread.java:5001)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at java.lang.reflect.Method.invokeNative(Native Method)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at java.lang.reflect.Method.invoke(Method.java:515)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at dalvik.system.NativeStart.main(Native Method)
08-06 03:23:03.893: E/AndroidRuntime(1168): Caused by: java.lang.ClassCastException: com.apks.mumbaifashion.MainActivity2 cannot be cast to android.app.Activity
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
08-06 03:23:03.893: E/AndroidRuntime(1168):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2101)
08-06 03:23:03.893: E/AndroidRuntime(1168):     ... 11 more
08-06 03:23:06.653: I/Process(1168): Sending signal. PID: 1168 SIG: 9

Where i am doing wrong?

score 1 · Accepted Answer · answered Aug 06 '15 at 06:47

1

You are correctly setting your custom MyWebViewClient, but in the following line you just replace it with a custom one. Try this, replacing both mWebView.setWebViewClient lines:

mWebView.setWebViewClient(new MyWebViewClient() {

    @Override public void onPageFinished(WebView view, String url) {
        //hide loading image
        findViewById(R.id.imageLoading1).setVisibility(View.GONE);
        //show webview
        findViewById(R.id.webView1).setVisibility(View.VISIBLE);
    }

});

This is one of the solutions. You can also implement onPageFinished in your custom MyWebViewClient class, or implement shouldOverrideUrlLoading in the anonymous child class of WebViewClient.

answered Aug 06 '15 at 06:47

lorenzo-s

16,603
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Thank you for fast reply.I have replaced the following code.Now when i click on the link from which i have to start second Activity i am getting error of "unfortunately app has stopped" – Anshul Khare Aug 06 '15 at 07:05
Post your relevant portion from your logcat, you should see lot of details about your error. – lorenzo-s Aug 06 '15 at 07:07
I have posted the Logcat the error is "java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.apks.mumbaifashion/com.apks.mumbaifashion.YourActivity}: java.lang.ClassCastException: com.apks.mumbaifashion.YourActivity cannot be cast to android.app.Activity" – Anshul Khare Aug 06 '15 at 07:28
I can't see `com.apks.mumbaifashion.YourActivity` anywhere in your code. What is it and where are you using it? – lorenzo-s Aug 06 '15 at 07:29
Sorry its MainActivity2 instead of YourActivity. MainActivity2 is my second activity which i have to start from webview – Anshul Khare Aug 06 '15 at 07:36
If `MainActivity2` can't be casto to `Activity`, it means it is not an activity. Please make it extend `ActionBarActivity` (or some other subclass of `Activity`) like your `MainActivity` does. And declare it in the *AndroidManifest.xml* file. If you have difficulties doing that, post the content of *MainActivity2.java* and *AndroidManifest.xml*. Anyway, that's now a different problem from the original question. – lorenzo-s Aug 06 '15 at 07:40
Thank You Very Much Its Finally Worked, You Saved My Life :D – Anshul Khare Aug 06 '15 at 07:57

score 1 · Answer 2 · answered Aug 06 '15 at 07:04

I suggest you fire an intent with the activity you want directly from onPageFinished

Something like:

@Override
public void onPageFinished(WebView view, String url) {
       if (url.equals("http://fashion.example.com/my-account/lost-password/")){
           Intent intent = new Intent(MainActivity.this, MainActivity2.class);
           startActivity(intent);                
        }

sjain · Answer 3 · 2015-08-06T07:47:54.487

You have to override shouldOverrideUrlLoading:

This should do:

private class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        if (url.equals("YOURLINK")) {
            Intent intent = new Intent(getContext(), YourActivity.class);
            startActivity(intent);
            return false;
        }else{
            view.loadURL(url);
            return true;
        }
    }
}

UPDATE:

Exception:

Caused by: java.lang.ClassCastException:    
com.apks.mumbaifashion.MainActivity2 
cannot be cast to android.app.Activity

Reason:

Your MainActivity2 class doesn't seem to extend Activity. That's all I can see with only your manifest and StackTrace.

How to start activity when a link is clicked in webview?

3 Answers3