Android - WebView back button

Question

I have a mirroring of a website in WebView and I would like that when I press the ** Back ** button on the Smartphone, I would go back to the previous page. Currently if I press the ** Back ** button on the Smartphone, the application is minimized (It stays in the background). I do not know how to do this, can anyone help me?

MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {

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

        WebView wv = (WebView) findViewById(R.id.webview1);
        wv.loadUrl("https://www.xxxx.com.br");
        wv.setWebViewClient(new WebViewClient());

        WebSettings ws = wv.getSettings();
        ws.setJavaScriptEnabled(true);
        ws.setSupportZoom(false);

Manifest

<uses-permission android:name="android.permission.INTERNET" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@drawable/ic_stat_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>

Hi, I'm new to the community. Sorry, I did not know how to use the search feature. What is the procedure for deleting this topic, since the topic you posted helped in solving the problem: How to go back to previous page if pressed in WebView? — Ever, Oct 18 '17 at 04:56

Nabin Bhandari · Accepted Answer · 2017-10-18T03:16:25.633

8

Override the onBackPressed method in your activity as below:

@Override
public void onBackPressed(){
    WebView wv = (WebView)findViewById(R.id.webview1);
    if(wv.canGoBack()){
        wv.goBack();
    } else {
        super.onBackPressed();
    }
}

Use the above method inside your class, not outside.

public class MainActivity extends AppCompatActivity {

    //onCreate method

    //onBackPressed method

    //other methods

}

edited Oct 18 '17 at 03:16

answered Oct 18 '17 at 02:23

Nabin Bhandari

15,949
6
45
59

Returned with errors: _Error:(31, 12) error: class, interface, or enum expected_ _Error:Execution failed for task ':app:compileDebugJavaWithJavac'. > Compilation failed; see the compiler error output for details._ – Ever Oct 18 '17 at 02:46
After the adjustments, it worked perfectly. – Ever Oct 18 '17 at 03:36
Saved me a headache, thanks – Cesar Bielich Dec 28 '18 at 00:01

KeLiuyue · Answer 2 · 2017-10-18T03:12:13.410

0

Use this .

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()) {
        webView.goBack();
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Add wv as global data

private WebView wv;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    wv = (WebView) findViewById(R.id.webview1);
    wv.loadUrl("https://www.xxxxx.com.br");
    wv.setWebViewClient(new WebViewClient());

    WebSettings ws = wv.getSettings();
    ws.setJavaScriptEnabled(true);
    ws.setSupportZoom(false);

}

edited Oct 18 '17 at 03:12

answered Oct 18 '17 at 02:23

KeLiuyue

8,149
4
25
42

Returned with errors: _Error:(33, 12) error: class, interface, or enum expected_ _Error:Execution failed for task ':app:compileDebugJavaWithJavac'._ – Ever Oct 18 '17 at 02:40
Use `wv` instead of `WebView` in your code .It was `WebView` Object . – KeLiuyue Oct 18 '17 at 02:41
As the error persists, I inserted the above code – Ever Oct 18 '17 at 03:04
You can try again.@Ever – KeLiuyue Oct 18 '17 at 03:12

Android - WebView back button

2 Answers2