eclipse – Android Webview app won't let video player go full screen-ThrowExceptions

Exception or error:

Hi I created a WebView app for my video site. The design of the site is a hybrid that loads for mobile users. Only videos compatible with mobile devices are loaded onto the hybrid. The players are from Vk, DailyMotion, YouTube, and QuickTime.

The videos only play on SDK 11 and higher but when I click on the player button to go full screen it only stops the video from playing while never launching into full screen mode.

(Webviewactivity.java)

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().requestFeature(Window.FEATURE_PROGRESS);
    setContentView(R.layout.main);

    parentView = (RelativeLayout) findViewById(R.id.parent_rl);

    webviewProgress = (ProgressBar) findViewById(R.id.webview_progress);

    webview = (WebView) findViewById(R.id.webview);
    webview.getSettings().setJavaScriptEnabled(true);
    webview.getSettings().setBuiltInZoomControls(true);
    webview.getSettings().setAllowFileAccess(true);
    webview.setWebViewClient(new MyWebViewClient());
    webview.getSettings().setPluginState(WebSettings.PluginState.ON);
    webview.loadUrl(URL);
    webviewProgress.setProgress(0);

    webview.setWebChromeClient(new MyWebChromeClient());
    webview.setDownloadListener(new DownloadListener() {
        public void onDownloadStart(String url, String userAgent,
                String contentDisposition, String mimetype,
                long contentLength) {
            mProgressDialog = new ProgressDialog(WebViewActivity.this);
            mProgressDialog.setMessage("Downloading...");
            mProgressDialog.setIndeterminate(false);
            mProgressDialog.setMax(100);
            mProgressDialog
                    .setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            DownloadFile downloadFile = new DownloadFile();
            downloadFile.execute(url);
        }
    });

    initSlider();

    initAdmob();
}

/**
 * When when file was chosen
 */
@Override
protected void onActivityResult(int requestCode, int resultCode,
        Intent intent) {
    if (requestCode == FILECHOOSER_RESULTCODE) {
        if (null == mUploadMessage)
            return;
        Uri result = intent == null || resultCode != RESULT_OK ? null
                : intent.getData();
        mUploadMessage.onReceiveValue(result);
        mUploadMessage = null;

(Main.xml)

android:id="@+id/parent_rl"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:keepScreenOn="true" >

<ProgressBar
    android:id="@+id/webview_progress"
    style="?android:attr/progressBarStyleHorizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:maxHeight="5dip"
    android:minHeight="5dip"
    android:progressDrawable="@drawable/blueprogress" />

<FrameLayout
    android:id="@+id/framelayout"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/webview_progress"
    android:orientation="vertical" >

    <WebView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

(Manifest.xml)

package="com.wCHfree"
android:versionCode="7"
android:versionName="1.1" >

<uses-sdk
    android:minSdkVersion="11"
    android:targetSdkVersion="17" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />

<application
    android:icon="@drawable/ic_launcher_red"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.Black" >
    <activity
        android:name="com.webview.splashScreen.SplashScreenActivity"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="com.webview.splashScreen.WebViewActivity"
        android:configChanges="orientation|screenSize|screenLayout"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
    </activity>
    <activity
        android:name="com.google.ads.AdActivity"
        android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
How to solve:

You need to implement showCustomView & hideCustomView method of WebChromeClient, also You need android:hardwareAccelerated="true" in your AndroidManifest File.
I am posting my sample project here.
What i have done is kept one Framelayout(customContainer) in my main.xml, and adding view received in showCustomView here, and removing it in onHide. Also hiding/showing webview accordingly. Below code works perfectly on device.

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.example.webview"
          android:versionCode="1"
          android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher"
            android:hardwareAccelerated="true">
        <activity android:name="MyActivity"
                  android:configChanges="orientation|keyboardHidden"
                  android:hardwareAccelerated="true"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
        >
    <WebView
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:id="@+id/webView"
            android:layout_gravity="center"
            />
    <FrameLayout
            android:id="@+id/customViewContainer"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:visibility="gone"
            />
</LinearLayout>

video_progress.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/progress_indicator"
              android:orientation="vertical"
              android:layout_centerInParent="true"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">

    <ProgressBar android:id="@android:id/progress"
                 style="?android:attr/progressBarStyleLarge"
                 android:layout_gravity="center"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"/>

    <TextView android:paddingTop="5dip"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_gravity="center"
              android:text="loading"
              android:textSize="14sp"
              android:textColor="?android:attr/textColorPrimary"/>
</LinearLayout>

MyActivity.java

package com.example.webview;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;

public class MyActivity extends Activity {
    private WebView webView;
    private FrameLayout customViewContainer;
    private WebChromeClient.CustomViewCallback customViewCallback;
    private View mCustomView;
    private myWebChromeClient mWebChromeClient;
    private myWebViewClient mWebViewClient;

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        customViewContainer = (FrameLayout) findViewById(R.id.customViewContainer);
        webView = (WebView) findViewById(R.id.webView);

        mWebViewClient = new myWebViewClient();
        webView.setWebViewClient(mWebViewClient);

        mWebChromeClient = new myWebChromeClient();
        webView.setWebChromeClient(mWebChromeClient);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setAppCacheEnabled(true);
        webView.getSettings().setBuiltInZoomControls(true);
        webView.getSettings().setSaveFormData(true);
        webView.loadUrl("http://m.youtube.com");
    }

    public boolean inCustomView() {
        return (mCustomView != null);
    }

    public void hideCustomView() {
        mWebChromeClient.onHideCustomView();
    }

    @Override
    protected void onPause() {
        super.onPause();    //To change body of overridden methods use File | Settings | File Templates.
        webView.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();    //To change body of overridden methods use File | Settings | File Templates.
        webView.onResume();
    }

    @Override
    protected void onStop() {
        super.onStop();    //To change body of overridden methods use File | Settings | File Templates.
        if (inCustomView()) {
            hideCustomView();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {

            if (inCustomView()) {
                hideCustomView();
                return true;
            }

            if ((mCustomView == null) && webView.canGoBack()) {
                webView.goBack();
                return true;
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    class myWebChromeClient extends WebChromeClient {
        private Bitmap mDefaultVideoPoster;
        private View mVideoProgressView;

        @Override
        public void onShowCustomView(View view, int requestedOrientation, CustomViewCallback callback) {
           onShowCustomView(view, callback);    //To change body of overridden methods use File | Settings | File Templates.
        }

        @Override
        public void onShowCustomView(View view,CustomViewCallback callback) {

            // if a view already exists then immediately terminate the new one
            if (mCustomView != null) {
                callback.onCustomViewHidden();
                return;
            }
            mCustomView = view;
            webView.setVisibility(View.GONE);
            customViewContainer.setVisibility(View.VISIBLE);
            customViewContainer.addView(view);
            customViewCallback = callback;
        }

        @Override
        public View getVideoLoadingProgressView() {

            if (mVideoProgressView == null) {
                LayoutInflater inflater = LayoutInflater.from(MyActivity.this);
                mVideoProgressView = inflater.inflate(R.layout.video_progress, null);
            }
            return mVideoProgressView;
        }

        @Override
        public void onHideCustomView() {
            super.onHideCustomView();    //To change body of overridden methods use File | Settings | File Templates.
            if (mCustomView == null)
                return;

            webView.setVisibility(View.VISIBLE);
            customViewContainer.setVisibility(View.GONE);

            // Hide the custom view.
            mCustomView.setVisibility(View.GONE);

            // Remove the custom view from its container.
            customViewContainer.removeView(mCustomView);
            customViewCallback.onCustomViewHidden();

            mCustomView = null;
        }
    }

    class myWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            return super.shouldOverrideUrlLoading(view, url);    //To change body of overridden methods use File | Settings | File Templates.
        }
    }

}

You can clone sample project from here..

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