webview_flutter android 平台支持非 po

Android端代码

package com.gta.gj.webview;

import android.content.Context;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.Log;
import android.webkit.JavascriptInterface;
import android.webkit.WebView;

import com.gta.gj.webview.download.WebDownloadListener;
import com.gta.gj.webview.settings.WebViewDefaultSettings;
import com.gta.gj.webview.webchromeclient.CustomWebChromeClient;
import com.gta.gj.webview.webviewclient.CustomWebViewClient;
import com.gta.gj.webview.webviewclient.WebViewCallBack;

public class BaseWebView extends WebView {
    public static final String TAG = "BaseWebView";
    private boolean mNoCache = true;
    private CustomWebChromeClient mCustomWebChromeClient;

    public BaseWebView(Context context) {
        super(context);
        init();
    }

    public BaseWebView(Context context, boolean noCache) {
        super(context);
        mNoCache = noCache;
        init();
    }

    public BaseWebView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public BaseWebView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    public BaseWebView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init();
    }

    public void init() {
        addJavascriptInterface(this, "app");
        WebViewDefaultSettings.getInstance().setSettings(this, mNoCache);
    }

    public void registerWebViewCallBack(WebViewCallBack webViewCallBack) {
        setWebViewClient(new CustomWebViewClient(webViewCallBack));
        mCustomWebChromeClient = new CustomWebChromeClient(webViewCallBack);
        setWebChromeClient(mCustomWebChromeClient);
        setDownloadListener(new WebDownloadListener(getContext()));
    }

    public CustomWebChromeClient getWebChromeClient() {
        return mCustomWebChromeClient;
    }

    @JavascriptInterface
    public void fromHtml(final String jsParam) {
        Log.e(TAG, "this is a call from html javascript." + jsParam);
        if (!TextUtils.isEmpty(jsParam)) {
            WebViewJavascriptDispatcher.getInstance().executeCommand(jsParam);
        }
    }

    public void handleCallback(final String callbackName, final String response) {
        if (!TextUtils.isEmpty(callbackName) && !TextUtils.isEmpty(response)) {
            post(new Runnable() {
                @Override
                public void run() {
                    String jscode = "javascript:xiangxuejs.callback('" + callbackName + "'," + response + ")";
                    evaluateJavascript(jscode, null);
                }
            });
        }
    }
}

在 webview_flutter_android --> JavaScriptChannel.jave 添加下面代码

    // Suppressing unused warning as this is invoked from JavaScript.
  @SuppressWarnings("unused")
  @JavascriptInterface
  public void fromHtml(final String message) {
    final Runnable postMessageRunnable =
        () -> {
          flutterApi.postMessage(JavaScriptChannel.this, message, reply -> {});
        };

    if (platformThreadHandler.getLooper() == Looper.myLooper()) {
      postMessageRunnable.run();
    } else {
      platformThreadHandler.post(postMessageRunnable);
    }
  }