RK:更新Webview、Chrome、onReceivedError（加载失败）

一.App 内打开 URL 链接有三种响应方式：
内置 WebView 组件
Chrome Custom Tabs
外部浏览器

二.Webview&Chrome
Android的Webview在低版本和高版本采用了不同的webkit版本内核，4.4后直接使用了Chrome.
WebView是一个基于webkit引擎、展现web页面的控件.
所以说,chrome和webview本质上是一样的，但是chrome作为浏览器的一种,可以独立运行,
而webview是android开发中使用的一个控件,一般是内置在不同的app中，并不是一个应用，是应用中的一部分.

三.如何升级Webview?
3.1.Android5.1开始，Webview具体实现从框架层剥离出来，通过一个包名来来控制加载真正的
Webview实现，具体的包名是com.android.webview,如果要切换到不同的Webview实现,就要
改掉系统默认的包名

3.2.android5.1 修改(For android6.0 & before)

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frameworks/base/core/res/res/values/config.xml -     <string name="config_webViewPackageName" translatable="false">com.android.webview</string> +    <string name="config_webViewPackageName" translatable="false">com.google.android.webview</string>

3.3./vendor/rockchip/common/webkit/webkit.mk

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#PRODUCT_COPY_FILES += \ -        vendor/rockchip/common/webkit/chrome-command-line:system/etc/chrome-command-line \ -        vendor/rockchip/common/webkit/chrome.sh:system/bin/chrome.sh   +       vendor/rockchip/common/webkit/webview.apk:system/app/webview/webview.apk \ +       vendor/rockchip/common/webkit/libwebviewchromium.so:system/lib/libwebviewchromium.so

3.4.RK android7.1 更新webview

a.这个缓存先要删掉  out\target\product\rk3288\obj\APPS\webview_intermediates

b.系统在开机过程中会自动根据这个配置文件中的顺序来搜索设备中已经安装并启用的包信息，找到以后直接返回，例如下面配置

中的三个发行版如果安装并启用了，则默认的包名com.android.webview。我这里并不建议改这个发行版的顺序，因为本身已经是按稳定性排序过的了。

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diff --git a/external/chromium-webview/prebuilt/arm/webview.apk b/external/chromium-webview/prebuilt/arm/webview.apk old mode 100644 new mode 100755 index 0aee317..71b202c Binary files a/external/chromium-webview/prebuilt/arm/webview.apk and b/external/chromium-webview/prebuilt/arm/webview.apk differ diff --git a/frameworks/base/core/res/res/xml/config_webview_packages.xml b/frameworks/base/core/res/res/xml/config_webview_packages.xml old mode 100644 new mode 100755 index f062b59..f899113 --- a/frameworks/base/core/res/res/xml/config_webview_packages.xml +++ b/frameworks/base/core/res/res/xml/config_webview_packages.xml @@ -18,4 +18,6 @@      <!-- The default WebView implementation -->      <webviewprovider description="Android WebView" packageName="com.android.webview" availableByDefault="true">      </webviewprovider>      <webviewprovider description="Chrome Stable" packageName="com.android.chrome" availableByDefault="true"/>      <webviewprovider description="Google WebView" packageName="com.google.android.webview" availableByDefault="true" isFallback="true"/>  </webviewproviders>

 3.5.浏览器上百度，会报错：net::err_unknown_url_scheme

说人话就是   webview只能识别http, https这样的协议，像一些微信(weixin://)、去哪儿(qunaraphone://)，百度(baiduboxlite://),
他们自定义的协议webView是无法识别的 因此就会出现：ERR_UNKNOWN_URL_SCHEME这样的错误

3.6.Android webview版本

 7.1

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1	adb shell am start -a android.intent.action.VIEW -d https://liulanmi.com/labs/core.html

四.Android5.1 onReceivedError 加载失败 连接问题

4.1.packages\apps\Browser\src\com\android\browser\Tab.java

R.string.browserFrameNetworkErrorLabel（连接问题）-> 弹窗 private void showError(ErrorDialog errDialog) {

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private void queueError(int err, String desc) {     if (mQueuedErrors == null) {         mQueuedErrors = new LinkedList<ErrorDialog>();     }     for (ErrorDialog d : mQueuedErrors) {         if (d.mError == err) {             // Already saw a similar error, ignore the new one.             return;         }     }     ErrorDialog errDialog = new ErrorDialog(             err == WebViewClient.ERROR_FILE_NOT_FOUND ?             R.string.browserFrameFileErrorLabel :             R.string.browserFrameNetworkErrorLabel,             desc, err);     mQueuedErrors.addLast(errDialog);       // Show the dialog now if the queue was empty and it is in foreground     if (mQueuedErrors.size() == 1 && mInForeground) {         showError(errDialog);     } }

public void onReceivedError(WebView view, int errorCode,String description, String failingUrl) {　　

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/**  * Show a dialog informing the user of the network error reported by  * WebCore if it is in the foreground.  */ @Override public void onReceivedError(WebView view, int errorCode,         String description, String failingUrl) {     if (errorCode != WebViewClient.ERROR_HOST_LOOKUP &&             errorCode != WebViewClient.ERROR_CONNECT &&             errorCode != WebViewClient.ERROR_BAD_URL &&             errorCode != WebViewClient.ERROR_UNSUPPORTED_SCHEME &&             errorCode != WebViewClient.ERROR_FILE) {         queueError(errorCode, description);           // Don't log URLs when in private browsing mode         if (!isPrivateBrowsingEnabled()) {             Log.e(LOGTAG, "onReceivedError " + errorCode + " " + failingUrl                 + " " + description);         }     } }

 4.2下载bilibili 报 连接问题 net:ERR_FAILED

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1	E/Tab     ( 1616): onReceivedError -1 https://gdown.baidu.com/appcenter/pkg/upload/c01dc52c9d8e3fa728c1759ab2f0d224 net::ERR_FAILED

打开HTTPS 百度

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1	gatsby  ( 2368): errorCode->-1 description->net::ERR_CACHE_MISS failingUrl->https://www.baidu.com

  测试demo

+ View Code?

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical">       <TextView         android:id="@+id/tv1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="升级维护中"         android:visibility="gone" />       <WebView         android:id="@+id/activity_webview2"         android:layout_width="match_parent"         android:layout_height="match_parent" />     </LinearLayout>

　　onReceivedError

+ View Code?

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package com.gatsby.webviewreciver;   import android.os.Bundle; import android.util.Log; import android.webkit.WebChromeClient; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.TextView;   import androidx.appcompat.app.AppCompatActivity;   public class MainActivity extends AppCompatActivity {       private WebView activity_webview;     private TextView tv1;     private String downLoadUrl = "https://www.baidu.com/";       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         tv1=(TextView)findViewById(R.id.tv1);         activity_webview=(WebView) findViewById(R.id.activity_webview2);         activity_webview.loadUrl(downLoadUrl);         activity_webview.setWebChromeClient(new WebChromeClient(){             @Override             public void onReceivedTitle(WebView view, String title) {                 super.onReceivedTitle(view, title);             }         });         activity_webview.setWebViewClient(new WebViewClient(){             @Override             public boolean shouldOverrideUrlLoading(WebView view, String url) {                 view.loadUrl(url);                 return super.shouldOverrideUrlLoading(view, url);             }               @Override             public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {                 super.onReceivedError(view, errorCode, description, failingUrl);                 Log.d("gatsby","errorCode->"+errorCode+" description->"+description+" failingUrl->"+failingUrl);             }         });     } }