Recently, I saw an error log statistics platform WebView The error of , I haven't encountered this error before . The error is as follows ：
java.lang.RuntimeException Using WebView from more than one process at once with the same data directory is not supported
After searching for relevant information , Found to be Android P When it was released , Yes WebView The relevant usage has been changed ： Multiple processes are not allowed to use the same directory WebView, Need for different processes of WebView Set up different directories .
You can see it , When our targetSdkVersion by 28 And above , And it needs to be used in multi process mode WebView When , You need to adjust accordingly , In order to correctly support .
1. Multi process WebView Use problem recurrence
First of all, we need to apply targetSdkVersion Of Api Level set to 28 And above . And then through two different processes Activity Separate use WebView Add Web page to realize .
Yes Activity The following configuration methods can be used to set up different processes ：
<activity android:name=".TestWebViewActivity" android:process=":ProcessName" />
Last , stay Android P Running on a real machine , You can reproduce the mistakes mentioned earlier .
2. Multi process WebView Use problem fix
Obviously ,webview The errors are caused by different processes , in other words Android P in the light of WebView In different processes, you can't access the process that is not your own webview Catalog .
Solve this problem , You need to be compatible with Android P The mechanism of ：
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
// Restoration WebView Multi process loading of bug
initWebView();
}
private void initWebView() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
String processName = getProcessName();
WebView.setDataDirectorySuffix(processName);
}
}
}
The example code address for this problem is ：
link ：https://pan.baidu.com/s/1RrActtFvjQ4X9l18FMx5sQ
Extraction code ：p09p
