前言：
之前發生一個問題，如果直接用WebView開啟Facebook的直播會出現一片空白的問題。因為要看直播一定要開啟facebook的頁面，他會要求你們開啟FB原生的app看直播
但點擊「開啟facebook」後連過去會是一片空白。
稍微檢查一下點連擊的url就會發現問題所在了。
他吐給你的url是一串意義不明的東西。
intent://video/?id=%7B25668421....
大致上長上面那樣
這時候我查了一下開啟fb的方式
發現他們開啟fb的暗碼都是 fb://xxxx
在shouldOverrideUrlLoading撈到url後，直接把url內的intent改成fb就可以順利開啟直播囉！
重點程式碼：
下面例子的facebook直播網址請去臉書上面隨機找一個直播連結。 WebViewClient mWebViewClient = new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.d(TAG, "checkpoint = " + url);
if (url.contains("com.facebook.katana")) {
try {
//確認是否有安裝facebook，假如這串錯誤 直接跳到catch
activity.getPackageManager().getPackageInfo("com.facebook.katana", 0);
//如果有抓取到url 把吐出來的intent改成fb
String facebookUrl = url.replace("intent", "fb");
//在外部開啟連結
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(facebookUrl)));
//在Log確認開啟連結的網址
Log.d("MainActivity", "facebookUrl = " + facebookUrl);
} catch (PackageManager.NameNotFoundException e) {
Toast.makeText(activity, "你沒安裝facebook喔，請先安裝！", Toast.LENGTH_SHORT).show();
}
finish();
} else {
view.loadUrl(url);
}
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
Log.d(TAG, "error onReceivedError = " + request);
view.setVisibility(View.GONE);
}
};
重點都在這了，下面就直接上完整程式碼。
完整程式碼：
activity_main.xml<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.hello.kaiser.webview.MainActivity">
<WebView
android:id="@+id/webview_show"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.constraint.ConstraintLayout>
MainActivity.java
下面的直播連結請去fb隨機找一個直播來取代
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private WebView mWebView;
private Activity activity;
public static String FACEBOOK_URL = "https://www.facebook.com/hua.yingxin.9/videos/256684214854665/?hc_ref=ARTnenvMQbNXRjjvZag73twoaqxWfAd3a8D-U11DAVIaopXBFDEcHXMoGsG4KYL7BCQ&fref=gs&dti=1461364913895987&hc_location=group";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
activity = this;
mWebView = (WebView) findViewById(R.id.webview_show);
WebSettings websettings = mWebView.getSettings();
websettings.setSupportZoom(true);
websettings.setJavaScriptEnabled(true);
websettings.setAppCacheEnabled(true);
websettings.setSaveFormData(true);
websettings.setAllowFileAccess(true);
websettings.setDomStorageEnabled(true);
websettings.setBuiltInZoomControls(true);
websettings.setDisplayZoomControls(false);
// String ua = mWebView.getSettings().getUserAgentString();
// mWebView.getSettings().setUserAgentString("WebView");
websettings.setLayoutAlgorithm(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT ? WebSettings.LayoutAlgorithm.TEXT_AUTOSIZING
: WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
websettings.setLoadWithOverviewMode(true);
websettings.setUseWideViewPort(true);
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT) {
websettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
}
mWebView.setWebViewClient(mWebViewClient);
// mWebView.setWebViewClient(new WebViewClient());
mWebView.setWebChromeClient(new WebChromeClient());
mWebView.loadUrl(FACEBOOK_URL);
}
WebViewClient mWebViewClient = new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.d(TAG, "checkpoint = " + url);
if (url.contains("com.facebook.katana")) {
try {
//確認是否有安裝facebook，假如這串錯誤 直接跳到catch
activity.getPackageManager().getPackageInfo("com.facebook.katana", 0);
//如果有抓取到url 把吐出來的intent改成fb
String facebookUrl = url.replace("intent", "fb");
//在外部開啟連結
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(facebookUrl)));
//在Log確認開啟連結的網址
Log.d("MainActivity", "facebookUrl = " + facebookUrl);
} catch (PackageManager.NameNotFoundException e) {
Toast.makeText(activity, "你沒安裝facebook喔，請先安裝！", Toast.LENGTH_SHORT).show();
}
finish();
} else {
view.loadUrl(url);
}
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
Log.d(TAG, "error onReceivedError = " + request);
view.setVisibility(View.GONE);
}
};
}
