首先，Android 自帶的WebView控制元件是不支援flash播放的，在Android4.0以上的版本中，所以需要客戶端安裝adobe flashplayer播放器外掛，這樣就可以利用WebView來播放flash視訊。

具體的方法，還是直接上程式碼：

private FrameLayout mFullscreenContainer;
	private FrameLayout mContentView;
	private View mCustomView = null;
	private WebView mWebView;
	private String url = "";
	private LinearLayout vLoading;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.webview_layout);
		initViews();
		// 檢測本機是否安裝了flash播放器
		if (ToolUtil.checkAPP(getApplicationContext(), "com.adobe.flashplayer")) {
			initWebView();
			mHandler.sendEmptyMessageDelayed(011, 1000);
		} else {
			ToolUtil.MsgBox(VideoWebActivity.this, "提示", "請安裝flashplayer播放器。",
					"確認", "取消", new OKCallback() {

						@Override
						public void exec() {
							try {
								Intent intent = new Intent(Intent.ACTION_VIEW);
								// intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
								// 安裝檔案apk路徑
								String fileName = Environment
										.getExternalStorageDirectory()
										+ "/myapk/AdobeFlashPlayer.apk";
								// 建立URI
								Uri uri = Uri.fromFile(new File(fileName));
								intent.setDataAndType(uri,
										"application/vnd.android.package-archive");
								VideoWebActivity.this.startActivityForResult(
										intent, 11);
							} catch (Exception e) {
								Log.e("VideoWebActivity", e.toString());
							}
						}
					}, new CancelCallback() {

						@Override
						public void cancel() {

						}
					});
		}

		if (getPhoneAndroidSDK() >= 14) {// 4.0 需開啟硬體加速
			getWindow().setFlags(0x1000000, 0x1000000);
		}
	}

	private void initViews() {
		mFullscreenContainer = (FrameLayout) findViewById(R.id.fullscreen_custom_content);
		mContentView = (FrameLayout) findViewById(R.id.main_content);
		mWebView = (WebView) findViewById(R.id.webview_player);
		vLoading = (LinearLayout) findViewById(R.id.loading);
		vLoading.setVisibility(View.VISIBLE);
		url = getIntent().getStringExtra("Url");
		Log.e("Play URL --", "---" + url + "-----");
	}

	Handler mHandler = new Handler() {

		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			if (mWebView != null) {
				mWebView.loadUrl(url);
				Log.e("Play URL --", "---loadData-----");
			}
		}
	};

	private void initWebView() {
		WebSettings settings = mWebView.getSettings();
		settings.setJavaScriptEnabled(true);
		settings.setJavaScriptCanOpenWindowsAutomatically(true);
		settings.setPluginState(PluginState.ON);
		settings.setAllowFileAccess(true);
		settings.setLoadWithOverviewMode(true);
		settings.setDomStorageEnabled(true);// 設定DOM元素儲存
		settings.setAppCacheEnabled(true);
		settings.setDefaultTextEncodingName("UTF-8");
		settings.setUseWideViewPort(true);// 設定任意縮放
		mWebView.setBackgroundColor(0);
		mWebView.setVisibility(View.VISIBLE);
		mWebView.setWebChromeClient(new MyWebChromeClient());
		mWebView.setWebViewClient(new MyWebViewClient());
	}

	class MyWebChromeClient extends WebChromeClient {

		private CustomViewCallback mCustomViewCallback;
		private int mOriginalOrientation = 1;

		@Override
		public void onShowCustomView(View view, CustomViewCallback callback) {
			onShowCustomView(view, mOriginalOrientation, callback);
			super.onShowCustomView(view, callback);
		}

		@SuppressLint("Override")
		public void onShowCustomView(View view, int requestedOrientation,
				WebChromeClient.CustomViewCallback callback) {
			if (mCustomView != null) {
				callback.onCustomViewHidden();
				return;
			}
			if (getPhoneAndroidSDK() >= 14) {
				mFullscreenContainer.addView(view);
				mCustomView = view;
				mCustomViewCallback = callback;
				mOriginalOrientation = getRequestedOrientation();
				mContentView.setVisibility(View.INVISIBLE);
				mFullscreenContainer.setVisibility(View.VISIBLE);
				mFullscreenContainer.bringToFront();
				setRequestedOrientation(mOriginalOrientation);
			}

		}

		public void onHideCustomView() {
			mContentView.setVisibility(View.VISIBLE);
			if (mCustomView == null) {
				return;
			}
			mCustomView.setVisibility(View.GONE);
			mFullscreenContainer.removeView(mCustomView);
			mCustomView = null;
			mFullscreenContainer.setVisibility(View.GONE);
			try {
				mCustomViewCallback.onCustomViewHidden();
			} catch (Exception e) {
			}

			setRequestedOrientation(mOriginalOrientation);
		}

	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		initWebView();
		mHandler.removeMessages(011);
		mHandler.sendEmptyMessageDelayed(011, 1000);
	}

	class MyWebViewClient extends WebViewClient {

		@Override
		public boolean shouldOverrideUrlLoading(WebView view, String url) {
			view.loadUrl(url);
			return super.shouldOverrideUrlLoading(view, url);
		}

		// 載入完成
		@Override
		public void onPageFinished(WebView view, String url) {
			super.onPageFinished(view, url);
			vLoading.setVisibility(View.GONE);
		}

		// 開始載入
		@Override
		public void onPageStarted(WebView view, String url, Bitmap favicon) {
			super.onPageStarted(view, url, favicon);
		}

		@Override
		public void onReceivedError(WebView view, int errorCode,
				String description, String failingUrl) {
			super.onReceivedError(view, errorCode, description, failingUrl);
			Log.e("VideoWebActivity", "errorCode:-----" + errorCode + "  "
					+ description);
		}

	}

	public static int getPhoneAndroidSDK() {
		int version = 0;
		try {
			version = Integer.valueOf(android.os.Build.VERSION.SDK);
		} catch (NumberFormatException e) {
			e.printStackTrace();
		}
		return version;

	}

	@Override
	public void onPause() {// 繼承自Activity
		super.onPause();
		if (mWebView != null) {
			mWebView.onPause();
		}
	}

	@Override
	public void onResume() {// 繼承自Activity
		super.onResume();
		if (mWebView != null) {
			mWebView.onResume();
		}
	}

	@Override
	protected void onDestroy() {
		if (mWebView != null) {
			try {
				mWebView.clearView();
				mWebView.clearCache(true);
				mWebView.destroy();
				mWebView = null;
			} catch (Exception e) {
				System.out.println("後臺no kills");
			}
			Log.e("ada", "-----------destroy---------");
		}
		super.onDestroy();
	}

	@Override
	public void onBackPressed() {
		finish();
		super.onBackPressed();
	}

	@Override
	public boolean dispatchKeyEvent(KeyEvent event) {
		if (event.getKeyCode() == KeyEvent.KEYCODE_BACK
				&& event.getAction() == KeyEvent.ACTION_DOWN) {
			mWebView.loadData("", "text/html; charset=UTF-8", null);
			finish();
		}
		return super.dispatchKeyEvent(event);
	}
 

ANDROID應用開發的時候可能會用到WEBVIEW這個元件，使用過程中可能會接觸到WEBVIEWCLIENT與WEBCHROMECLIENT，那麼這兩個類到底有什麼不同呢？
WebViewClient主要幫助WebView處理各種通知、請求事件的，比如：

onLoadResource

onPageStart
onPageFinish
onReceiveError
onReceivedHttpAuthRequest
WebChromeClient主要輔助WebView處理Javascript的對話方塊、網站圖示、網站title、載入進度等比如

onCloseWindow(關閉WebView)
onCreateWindow()
onJsAlert (WebView上alert無效，需要定製WebChromeClient處理彈出)
onJsPrompt
onJsConfirm
onProgressChanged
onReceivedIcon
onReceivedTitle
看上去他們有很多不同，實際使用的話，如果你的WebView只是用來處理一些