【flutter开发】 --- 华为安卓10手机使用flutter_webview_plugin执行js闪退解决
flutter_webview_plugin版本0.3.11，替换FlutterWebviewPlugin.java即可，如下
package com.flutter_webview_plugin;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Point;
import android.view.Display;
import android.webkit.WebStorage;
import android.widget.FrameLayout;
import android.webkit.CookieManager;
import android.webkit.ValueCallback;
import android.os.Build;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.PluginRegistry;
import android.view.View;
import java.lang.reflect.Method;
import android.view.inputmethod.InputMethodManager;
import android.util.Log;
/**
* FlutterWebviewPlugin
*/
public class FlutterWebviewPlugin implements MethodCallHandler, PluginRegistry.ActivityResultListener {
private Activity activity;
private WebviewManager webViewManager;
private Context context;
static MethodChannel channel;
private static final String CHANNEL_NAME = "flutter_webview_plugin";
private static final String JS_CHANNEL_NAMES_FIELD = "javascriptChannelNames";
public static void registerWith(PluginRegistry.Registrar registrar) {
if (registrar.activity() != null) {
channel = new MethodChannel(registrar.messenger(), CHANNEL_NAME);
final FlutterWebviewPlugin instance = new FlutterWebviewPlugin(registrar.activity(), registrar.activeContext());
registrar.addActivityResultListener(instance);
channel.setMethodCallHandler(instance);
}
}
FlutterWebviewPlugin(Activity activity, Context context) {
this.activity = activity;
this.context = context;
Log.i("FlutterWebView", "activity: " + activity + ", context: " + context);
}
@Override
public void onMethodCall(MethodCall call, MethodChannel.Result result) {
switch (call.method) {
case "launch":
openUrl(call, result);
break;
case "close":
close(call, result);
break;
case "eval":
eval(call, result);
break;
case "resize":
resize(call, result);
break;
case "reload":
reload(call, result);
break;
case "back":
back(call, result);
break;
case "forward":
forward(call, result);
break;
case "hide":
hide(call, result);
break;
case "show":
show(call, result);
break;
case "reloadUrl":
reloadUrl(call, result);
break;
case "stopLoading":
stopLoading(call, result);
break;
case "cleanCookies":
cleanCookies(call, result);
break;
case "canGoBack":
canGoBack(result);
break;
case "canGoForward":
canGoForward(result);
break;
case "cleanCache":
cleanCache(result);
break;
default:
result.notImplemented();
break;
}
}
private void cleanCache(MethodChannel.Result result) {
webViewManager.cleanCache();
WebStorage.getInstance().deleteAllData();
result.success(null);
}
void openUrl(MethodCall call, MethodChannel.Result result) {
boolean hidden = call.argument("hidden");
String url = call.argument("url");
String userAgent = call.argument("userAgent");
boolean withJavascript = call.argument("withJavascript");
boolean clearCache = call.argument("clearCache");
boolean clearCookies = call.argument("clearCookies");
boolean mediaPlaybackRequiresUserGesture = call.argument("mediaPlaybackRequiresUserGesture");
boolean withZoom = call.argument("withZoom");
boolean displayZoomControls = call.argument("displayZoomControls");
boolean withLocalStorage = call.argument("withLocalStorage");
boolean withOverviewMode = call.argument("withOverviewMode");
boolean supportMultipleWindows = call.argument("supportMultipleWindows");
boolean appCacheEnabled = call.argument("appCacheEnabled");
Map headers = call.argument("headers");
boolean scrollBar = call.argument("scrollBar");
boolean allowFileURLs = call.argument("allowFileURLs");
boolean useWideViewPort = call.argument("useWideViewPort");
String invalidUrlRegex = call.argument("invalidUrlRegex");
boolean geolocationEnabled = call.argument("geolocationEnabled");
boolean debuggingEnabled = call.argument("debuggingEnabled");
boolean ignoreSSLErrors = call.argument("ignoreSSLErrors");
if (webViewManager == null || webViewManager.closed == true) {
Map arguments = (Map) call.arguments;
List channelNames = new ArrayList();
if (arguments.containsKey(JS_CHANNEL_NAMES_FIELD)) {
channelNames = (List) arguments.get(JS_CHANNEL_NAMES_FIELD);
}
webViewManager = new WebviewManager(activity, context, channelNames);
}
FrameLayout.LayoutParams params = buildLayoutParams(call);
activity.addContentView(webViewManager.webView, params);
try {
final InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
final Method focusInMethod = InputMethodManager.class.getDeclaredMethod("focusIn", View.class);
if (imm == null) Log.i("FlutterWebView", "imm is null");
if (focusInMethod == null) Log.i("FlutterWebView", "focusInMethod is null");
if (imm != null && focusInMethod != null) {
Log.i("FlutterWebView", "invoke focusInMethod");
focusInMethod.invoke(imm, webViewManager.webView);
}
} catch (Exception e) {
Log.w("FlutterWebView", "Process input method manager error!");
}
webViewManager.openUrl(withJavascript,
clearCache,
hidden,
clearCookies,
mediaPlaybackRequiresUserGesture,
userAgent,
url,
headers,
withZoom,
displayZoomControls,
withLocalStorage,
withOverviewMode,
scrollBar,
supportMultipleWindows,
appCacheEnabled,
allowFileURLs,
useWideViewPort,
invalidUrlRegex,
geolocationEnabled,
debuggingEnabled,
ignoreSSLErrors
);
result.success(null);
}
private FrameLayout.LayoutParams buildLayoutParams(MethodCall call) {
Map rc = call.argument("rect");
FrameLayout.LayoutParams params;
if (rc != null) {
params = new FrameLayout.LayoutParams(
dp2px(activity, rc.get("width").intValue()), dp2px(activity, rc.get("height").intValue()));
params.setMargins(dp2px(activity, rc.get("left").intValue()), dp2px(activity, rc.get("top").intValue()),
0, 0);
} else {
Display display = activity.getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
params = new FrameLayout.LayoutParams(width, height);
}
return params;
}
private void stopLoading(MethodCall call, MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.stopLoading(call, result);
}
result.success(null);
}
void close(MethodCall call, MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.close(call, result);
webViewManager = null;
}
}
/**
* Checks if can navigate back
*
* @param result
*/
private void canGoBack(MethodChannel.Result result) {
if (webViewManager != null) {
result.success(webViewManager.canGoBack());
} else {
result.error("Webview is null", null, null);
}
}
/**
* Navigates back on the Webview.
*/
private void back(MethodCall call, MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.back(call, result);
}
result.success(null);
}
/**
* Checks if can navigate forward
* @param result
*/
private void canGoForward(MethodChannel.Result result) {
if (webViewManager != null) {
result.success(webViewManager.canGoForward());
} else {
result.error("Webview is null", null, null);
}
}
/**
* Navigates forward on the Webview.
*/
private void forward(MethodCall call, MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.forward(call, result);
}
result.success(null);
}
/**
* Reloads the Webview.
*/
private void reload(MethodCall call, MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.reload(call, result);
}
result.success(null);
}
private void reloadUrl(MethodCall call, MethodChannel.Result result) {
if (webViewManager != null) {
String url = call.argument("url");
Map headers = call.argument("headers");
if (headers != null) {
webViewManager.reloadUrl(url, headers);
} else {
webViewManager.reloadUrl(url);
}
}
result.success(null);
}
private void eval(MethodCall call, final MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.eval(call, result);
}
}
private void resize(MethodCall call, final MethodChannel.Result result) {
if (webViewManager != null) {
FrameLayout.LayoutParams params = buildLayoutParams(call);
webViewManager.resize(params);
}
result.success(null);
}
private void hide(MethodCall call, final MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.hide(call, result);
}
result.success(null);
}
private void show(MethodCall call, final MethodChannel.Result result) {
if (webViewManager != null) {
webViewManager.show(call, result);
}
result.success(null);
}
private void cleanCookies(MethodCall call, final MethodChannel.Result result) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
CookieManager.getInstance().removeAllCookies(new ValueCallback() {
@Override
public void onReceiveValue(Boolean aBoolean) {
}
});
} else {
CookieManager.getInstance().removeAllCookie();
}
result.success(null);
}
private int dp2px(Context context, float dp) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dp * scale + 0.5f);
}
@Override
public boolean onActivityResult(int i, int i1, Intent intent) {
if (webViewManager != null && webViewManager.resultHandler != null) {
return webViewManager.resultHandler.handleResult(i, i1, intent);
}
return false;
}
}
核心代码：
在
activity.addContentView(webViewManager.webView, params);
后增加如下
activity.addContentView(webViewManager.webView, params);
try {
final InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
final Method focusInMethod = InputMethodManager.class.getDeclaredMethod("focusIn", View.class);
if (imm == null) Log.i("FlutterWebView", "imm is null");
if (focusInMethod == null) Log.i("FlutterWebView", "focusInMethod is null");
if (imm != null && focusInMethod != null) {
Log.i("FlutterWebView", "invoke focusInMethod");
focusInMethod.invoke(imm, webViewManager.webView);
}
} catch (Exception e) {
Log.w("FlutterWebView", "Process input method manager error!");
}