Cocos2dx支持内嵌Webview

项目需要展示隐私协议，想用内嵌网页的形式实现。

根据网上获取信息来看，用Cocos引擎的Webview实现起来比较复杂，且不同机型还存在BUG，

遂放弃了这种方式，采用系统原生的Webview实现该功能。

相关代码如下：

iOS平台：

#include "privacyPolicyView.h"
#include "AppController.h"

static privacyPolicyView *instance;

@implementation privacyPolicyView

- (void)loadView:(NSString *)url title:(NSString *)title
{
    CGRect screenRect=[UIScreen mainScreen].applicationFrame;
    _privacyView=[[UIView alloc]initWithFrame:screenRect];
    _privacyView.backgroundColor=[UIColor colorWithRed:1 green:1 blue:1 alpha:1];
    [self.rootViewC.view addSubview:_privacyView];
    
    int offsetY=40,lineHight=2;
    CGRect rect=screenRect;
    rect.origin.y=rect.origin.y+offsetY-lineHight;
    rect.size.height=lineHight;
    UIView *lineView=[[UIView alloc]initWithFrame:rect];
    lineView.backgroundColor=[UIColor colorWithRed:0.5 green:0.5 blue:0.5 alpha:1];
    [_privacyView addSubview:lineView];
    
    rect=screenRect;
    rect.origin.y=rect.origin.y+offsetY;
    rect.size.height=screenRect.size.height-offsetY;
    _webView = [[UIWebView alloc] initWithFrame:rect];
    NSURL *urlS=[NSURL URLWithString:url];
    [_webView loadRequest:[NSURLRequest requestWithURL:urlS]];
    [_privacyView addSubview:_webView];
    [_webView setScalesPageToFit:YES];
    _webView.delegate=self;
    
    UIButton *backbtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    backbtn.frame = CGRectMake(screenRect.size.width-60, 5, 30, 30);
    UIImage *btnImg=[UIImage imageNamed:@"zRes_back.png"];
    [backbtn setBackgroundImage:btnImg forState:UIControlStateNormal];
    [backbtn setBackgroundImage:btnImg forState:UIControlStateHighlighted];
    [backbtn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
    [_privacyView addSubview:backbtn];
    
    rect=CGRectMake(20, 0, 300, 40);
    UILabel *lbl=[[UILabel alloc]initWithFrame:rect];
    lbl.font=[UIFont systemFontOfSize:20];
    lbl.text=title;
    [_privacyView addSubview:lbl];
}
@end

NSString * toNSStr(std::string str)
{
    NSString *str_ns = [[NSString alloc] initWithCString:str.c_str()
                                                encoding:NSUTF8StringEncoding];
    return str_ns;
}

void loadPrivacyPolicyView(const char* url,const char* title)
{
    if (instance) {
        [instance loadView:toNSStr(url) title:toNSStr(title)];
    }
}

Android平台：

    private static String _url="";
    private static String _titleStr="";
    private static ViewGroup m_layout;
    private static LinearLayout m_polBgView,m_lineView;
    private static TextView m_titleT;
    private static Button m_polBackBtn;
    private static WebView m_webView;
    public static void loadPolicyView(String url,String titleStr){
        _activity._url=url;
        _activity._titleStr=titleStr;
        _activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                //获取屏幕大小
                DisplayMetrics dm=new DisplayMetrics();
                _activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
                int width=dm.widthPixels;
                int height=dm.heightPixels;
                //获取当前显示view
                FrameLayout contentView=(FrameLayout)_activity.getWindow().findViewById(android.R.id.content);
                m_layout =  (ViewGroup)contentView.getChildAt(0);

                int titleHight=40;
                m_polBgView=new LinearLayout(_activity);
                m_polBgView.setBackgroundColor(Color.rgb(255,255,255));
                m_layout.addView(m_polBgView,width,height);

                m_lineView=new LinearLayout(_activity);
                m_lineView.setBackgroundColor(Color.rgb(128,128,128));
                m_lineView.setX(0);
                m_lineView.setY(titleHight-2);
                m_layout.addView(m_lineView,width,2);

                m_titleT=new TextView(_activity);
                m_titleT.setText(_activity._titleStr);
                m_titleT.setTextSize(12);
                m_titleT.setTextColor(Color.rgb(0,0,0));
                m_titleT.setX(0);
                m_titleT.setY(5);
                m_layout.addView(m_titleT,width,titleHight);

                m_polBackBtn=new Button(_activity);
                m_polBackBtn.setOnClickListener(new View.OnClickListener(){
                    @Override
                    public void onClick(View v){
                        if(m_layout!=null){
                            m_layout.removeView(m_polBgView);
                            m_layout.removeView(m_lineView);
                            m_layout.removeView(m_titleT);
                            m_layout.removeView(m_polBackBtn);
                            m_layout.removeView(m_webView);
                        }
                    }
                });
                m_polBackBtn.setBackgroundResource(R.drawable.zres_back);
                m_polBackBtn.setX(width-50);
                m_polBackBtn.setY(5);
                m_layout.addView(m_polBackBtn,34,30);

                m_webView = new WebView(_activity);
                WebSettings settings = m_webView.getSettings();
                settings.setJavaScriptEnabled(true);
                settings.setDefaultTextEncodingName("UTF-8");
                //自适应手机屏幕
                settings.setUseWideViewPort(true);
                settings.setLoadWithOverviewMode(true);
                m_webView.loadUrl(_activity._url);
                m_webView.setY(titleHight);
                m_layout.addView(m_webView,width,height-titleHight);

                m_webView.setWebViewClient(new WebViewClient() {
                    @Override
                    public boolean shouldOverrideUrlLoading(WebView view, String url) {
                        view.loadUrl(url);
                        return super.shouldOverrideUrlLoading(view, url);
                    }

                    public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
                        //handler.cancel(); // Android默认的处理方式
                        handler.proceed();  // 接受所有网站的证书
                        //handleMessage(Message msg); // 进行其他处理
                    }
                });
            }
        });
    }

APP内调用展示网页：

#if (CC_TARGET_PLATFORM==CC_PLATFORM_IOS)
#import "privacyPolicyViewCpp.h"
#endif

#if(CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
#include <jni.h>
#include "platform/android/jni/JniHelper.h"
#endif


void HelloWorld::menuCloseCallback(Ref* pSender)
{
    const char* url="https://www.baidu.com";
    const char* title="Privacy Privacy";
#if (CC_TARGET_PLATFORM==CC_PLATFORM_IOS)
    loadPrivacyPolicyView(url, title);
#endif
    
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
    JniMethodInfo t;
    if (JniHelper::getStaticMethodInfo(t, "org/cocos2dx/cpp/AppActivity", "loadPolicyView", "(Ljava/lang/String;Ljava/lang/String;)V")) {
        jstring str0 = t.env->NewStringUTF(url);
        jstring str1 = t.env->NewStringUTF(title);
        t.env->CallStaticVoidMethod(t.classID, t.methodID, str0, str1);
        t.env->DeleteLocalRef(str0);
        t.env->DeleteLocalRef(str1);
        t.env->DeleteLocalRef(t.classID);
    }
#endif
}

实现的效果：

完整代码点击获取

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参考资料：

Android 如何在代码中动态的添加View

android webview 自适应手机屏幕

Android怎样处理webview加载https的问题

Cocos2dx支持内嵌Webview

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