removed webview -> remead "webview.h"
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#ifndef _WEBVIEW_NATIVE_ACTIVITY
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#define _WEBVIEW_NATIVE_ACTIVITY
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#include <android/native_activity.h>
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extern volatile jobject g_objRootView;
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typedef struct
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{
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jobject WebViewObject;
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jobjectArray MessageChannels;
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jobject BackingBitmap;
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jobject BackingCanvas;
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int updated_canvas;
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int w, h;
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} WebViewNativeActivityObject;
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// Must be called from main thread
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// initial_url = "about:blank" for a java-script only page. Can also be file:///android_asset/test.html.
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// Loading from "about:blank" will make the page ready almost immediately, otherwise it's about 50ms to load.
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// useLooperForWebMessages is required, and must be a global jobject of your preferred looper to handle webmessages.
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void WebViewCreate( WebViewNativeActivityObject * w, const char * initial_url, jobject useLooperForWebMessages, int pw, int ph );
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void WebViewExecuteJavascript( WebViewNativeActivityObject * obj, const char * js );
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// Note: Do not initialize until page reports as 100% loaded, with WebViewGetProgress.
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void WebViewPostMessage( WebViewNativeActivityObject * obj, const char * mesg, int initial );
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void WebViewRequestRenderToCanvas( WebViewNativeActivityObject * obj );
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int WebViewGetProgress( WebViewNativeActivityObject * obj );
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char * WebViewGetLastWindowTitle( WebViewNativeActivityObject * obj );
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// Can be called from any thread.
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void WebViewNativeGetPixels( WebViewNativeActivityObject * obj, uint32_t * pixel_data, int w, int h );
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#ifdef WEBVIEW_NATIVE_ACTIVITY_IMPLEMENTATION
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volatile jobject g_objRootView;
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void WebViewCreate( WebViewNativeActivityObject * w, const char * initial_url, jobject useLooperForWebMessages, int pw, int ph )
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{
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const struct JNINativeInterface * env = 0;
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const struct JNINativeInterface ** envptr = &env;
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const struct JNIInvokeInterface ** jniiptr = gapp->activity->vm;
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jobject clazz = gapp->activity->clazz;
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const struct JNIInvokeInterface * jnii = *jniiptr;
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jnii->AttachCurrentThread( jniiptr, &envptr, NULL);
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env = (*envptr);
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if( g_objRootView == 0 )
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{
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jclass ViewClass = env->FindClass(envptr, "android/widget/LinearLayout");
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jmethodID ViewConstructor = env->GetMethodID(envptr, ViewClass, "<init>", "(Landroid/content/Context;)V");
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jclass activityClass = env->FindClass(envptr, "android/app/Activity");
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jmethodID activityGetContextMethod = env->GetMethodID(envptr, activityClass, "getApplicationContext", "()Landroid/content/Context;");
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jobject contextObject = env->CallObjectMethod(envptr, clazz, activityGetContextMethod);
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jobject jv = env->NewObject(envptr, ViewClass, ViewConstructor, contextObject );
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g_objRootView = env->NewGlobalRef(envptr, jv);
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jclass clszz = env->GetObjectClass(envptr,clazz);
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jmethodID setContentViewMethod = env->GetMethodID(envptr, clszz, "setContentView", "(Landroid/view/View;)V");
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env->CallVoidMethod(envptr,clazz, setContentViewMethod, g_objRootView );
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}
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jclass WebViewClass = env->FindClass(envptr, "android/webkit/WebView");
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jclass activityClass = env->FindClass(envptr, "android/app/Activity");
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jmethodID activityGetContextMethod = env->GetMethodID(envptr, activityClass, "getApplicationContext", "()Landroid/content/Context;");
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jobject contextObject = env->CallObjectMethod(envptr, clazz, activityGetContextMethod);
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jmethodID WebViewConstructor = env->GetMethodID(envptr, WebViewClass, "<init>", "(Landroid/content/Context;)V");
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jobject wvObj = env->NewObject(envptr, WebViewClass, WebViewConstructor, contextObject );
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// Unknown reason why - if you don't first load about:blank, it sometimes doesn't render right?
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// Even more annoying - you can't pre-use loadUrl if you want to use message channels.
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jmethodID WebViewLoadBaseURLMethod = env->GetMethodID(envptr, WebViewClass, "loadDataWithBaseURL", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V");
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jstring strul = env->NewStringUTF( envptr, "http://example.com" );
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jstring strdata = env->NewStringUTF( envptr, "not-yet-loaded" );
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jstring strmime = env->NewStringUTF( envptr, "text/html" );
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jstring strencoding = env->NewStringUTF( envptr, "utf8" );
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jstring strhistoryurl = env->NewStringUTF( envptr, "" );
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env->CallVoidMethod(envptr, wvObj, WebViewLoadBaseURLMethod, strul, strdata, strmime, strencoding, strhistoryurl );
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env->DeleteLocalRef( envptr, strul );
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env->DeleteLocalRef( envptr, strdata );
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env->DeleteLocalRef( envptr, strmime );
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env->DeleteLocalRef( envptr, strencoding );
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env->DeleteLocalRef( envptr, strhistoryurl );
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// You have to switch to this to be able to run javascript code.
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jmethodID LoadURLMethod = env->GetMethodID(envptr, WebViewClass, "loadUrl", "(Ljava/lang/String;)V");
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jstring strjs = env->NewStringUTF( envptr, initial_url );
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env->CallVoidMethod(envptr, wvObj, LoadURLMethod, strjs );
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env->DeleteLocalRef( envptr, strjs );
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jmethodID WebViewGetSettingMethod = env->GetMethodID(envptr, WebViewClass, "getSettings", "()Landroid/webkit/WebSettings;");
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jobject websettings = env->CallObjectMethod(envptr, wvObj, WebViewGetSettingMethod );
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jclass WebSettingsClass = env->FindClass(envptr, "android/webkit/WebSettings");
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jmethodID setJavaScriptEnabledMethod = env->GetMethodID(envptr, WebSettingsClass, "setJavaScriptEnabled", "(Z)V");
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env->CallVoidMethod( envptr, websettings, setJavaScriptEnabledMethod, true );
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env->DeleteLocalRef( envptr, websettings );
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jmethodID setMeasuredDimensionMethodID = env->GetMethodID(envptr, WebViewClass, "setMeasuredDimension", "(II)V");
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env->CallVoidMethod(envptr, wvObj, setMeasuredDimensionMethodID, pw, ph );
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jclass ViewClass = env->FindClass(envptr, "android/widget/LinearLayout");
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jmethodID addViewMethod = env->GetMethodID(envptr, ViewClass, "addView", "(Landroid/view/View;)V");
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env->CallVoidMethod( envptr, g_objRootView, addViewMethod, wvObj );
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jclass WebMessagePortClass = env->FindClass(envptr, "android/webkit/WebMessagePort" );
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jmethodID createWebMessageChannelMethod = env->GetMethodID(envptr, WebViewClass, "createWebMessageChannel", "()[Landroid/webkit/WebMessagePort;");
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jobjectArray messageChannels = env->CallObjectMethod( envptr, wvObj, createWebMessageChannelMethod );
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jobject mc0 = env->GetObjectArrayElement(envptr, messageChannels, 0); // MC1 is handed over to javascript.
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jclass HandlerClassType = env->FindClass(envptr, "android/os/Handler" );
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jmethodID HandlerObjectConstructor = env->GetMethodID(envptr, HandlerClassType, "<init>", "(Landroid/os/Looper;)V");
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jobject handlerObject = env->NewObject( envptr, HandlerClassType, HandlerObjectConstructor, useLooperForWebMessages );
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handlerObject = env->NewGlobalRef(envptr, handlerObject);
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jmethodID setWebMessageCallbackMethod = env->GetMethodID( envptr, WebMessagePortClass, "setWebMessageCallback", "(Landroid/webkit/WebMessagePort$WebMessageCallback;Landroid/os/Handler;)V" );
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// Only can receive messages on MC0
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env->CallVoidMethod( envptr, mc0, setWebMessageCallbackMethod, 0, handlerObject );
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// Generate backing bitmap and canvas.
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jclass CanvasClass = env->FindClass(envptr, "android/graphics/Canvas");
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jclass BitmapClass = env->FindClass(envptr, "android/graphics/Bitmap");
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jmethodID createBitmap = env->GetStaticMethodID(envptr, BitmapClass, "createBitmap", "(IILandroid/graphics/Bitmap$Config;)Landroid/graphics/Bitmap;");
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jclass bmpCfgCls = env->FindClass(envptr, "android/graphics/Bitmap$Config");
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jstring bitmap_mode = env->NewStringUTF(envptr, "ARGB_8888");
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jmethodID bmpClsValueOfMid = env->GetStaticMethodID(envptr, bmpCfgCls, "valueOf", "(Ljava/lang/String;)Landroid/graphics/Bitmap$Config;");
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jobject jBmpCfg = env->CallStaticObjectMethod(envptr, bmpCfgCls, bmpClsValueOfMid, bitmap_mode);
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jobject bitmap = env->CallStaticObjectMethod( envptr, BitmapClass, createBitmap, pw, ph, jBmpCfg );
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jmethodID canvasConstructor = env->GetMethodID(envptr, CanvasClass, "<init>", "(Landroid/graphics/Bitmap;)V");
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jobject canvas = env->NewObject(envptr, CanvasClass, canvasConstructor, bitmap );
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env->DeleteLocalRef( envptr, CanvasClass );
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env->DeleteLocalRef( envptr, BitmapClass );
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env->DeleteLocalRef( envptr, bmpCfgCls );
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env->DeleteLocalRef( envptr, bitmap_mode );
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w->BackingBitmap = env->NewGlobalRef(envptr, bitmap );
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w->BackingCanvas = env->NewGlobalRef(envptr, canvas );
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w->WebViewObject = env->NewGlobalRef(envptr, wvObj);
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w->MessageChannels = env->NewGlobalRef(envptr, messageChannels);
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w->w = pw;
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w->h = ph;
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env->DeleteLocalRef( envptr, WebViewClass );
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env->DeleteLocalRef( envptr, activityClass );
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env->DeleteLocalRef( envptr, WebSettingsClass );
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env->DeleteLocalRef( envptr, ViewClass );
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}
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int WebViewGetProgress( WebViewNativeActivityObject * obj )
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{
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const struct JNINativeInterface * env = 0;
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const struct JNINativeInterface ** envptr = &env;
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const struct JNIInvokeInterface ** jniiptr = gapp->activity->vm;
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const struct JNIInvokeInterface * jnii = *jniiptr;
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jnii->AttachCurrentThread( jniiptr, &envptr, NULL);
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env = (*envptr);
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jclass WebViewClass = env->FindClass(envptr, "android/webkit/WebView");
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jmethodID WebViewProgress = env->GetMethodID(envptr, WebViewClass, "getProgress", "()I");
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int ret = env->CallIntMethod( envptr, obj->WebViewObject, WebViewProgress );
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env->DeleteLocalRef( envptr, WebViewClass );
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return ret;
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}
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void WebViewPostMessage( WebViewNativeActivityObject * w, const char * mesg, int initial )
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{
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const struct JNINativeInterface * env = 0;
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const struct JNINativeInterface ** envptr = &env;
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const struct JNIInvokeInterface ** jniiptr = gapp->activity->vm;
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const struct JNIInvokeInterface * jnii = *jniiptr;
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jnii->AttachCurrentThread( jniiptr, &envptr, NULL);
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env = (*envptr);
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jclass WebMessagePortClass = env->FindClass(envptr, "android/webkit/WebMessagePort" );
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jclass WebViewClass = env->FindClass(envptr, "android/webkit/WebView");
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jclass WebMessageClass = env->FindClass(envptr, "android/webkit/WebMessage" );
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jstring strjs = env->NewStringUTF( envptr, mesg );
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if( initial )
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{
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jobject mc1 = env->GetObjectArrayElement(envptr, w->MessageChannels, 1);
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jmethodID WebMessageConstructor = env->GetMethodID(envptr, WebMessageClass, "<init>", "(Ljava/lang/String;[Landroid/webkit/WebMessagePort;)V");
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//https://stackoverflow.com/questions/41753104/how-do-you-use-webmessageport-as-an-alternative-to-addjavascriptinterface
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// Only on initial hop do we want to post the root webmessage, which hooks up out webmessage port.
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jmethodID postMessageMethod = env->GetMethodID(envptr, WebViewClass, "postWebMessage", "(Landroid/webkit/WebMessage;Landroid/net/Uri;)V");
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// Need to generate a new message channel array.
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jobjectArray jsUseWebPorts = env->NewObjectArray( envptr, 1, WebMessagePortClass, mc1);
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// Need Uri.EMPTY
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jclass UriClass = env->FindClass(envptr, "android/net/Uri" );
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jfieldID EmptyField = env->GetStaticFieldID( envptr, UriClass, "EMPTY", "Landroid/net/Uri;" );
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jobject EmptyURI = env->GetStaticObjectField( envptr, UriClass, EmptyField );
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jobject newwm = env->NewObject(envptr, WebMessageClass, WebMessageConstructor, strjs, jsUseWebPorts );
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env->CallVoidMethod( envptr, w->WebViewObject, postMessageMethod, newwm, EmptyURI );
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env->DeleteLocalRef( envptr, jsUseWebPorts );
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env->DeleteLocalRef( envptr, newwm );
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env->DeleteLocalRef( envptr, EmptyURI );
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env->DeleteLocalRef( envptr, UriClass );
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}
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else
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{
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jobject mc0 = env->GetObjectArrayElement(envptr, w->MessageChannels, 0);
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jmethodID postMessageMethod = env->GetMethodID(envptr, WebMessagePortClass, "postMessage", "(Landroid/webkit/WebMessage;)V");
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jmethodID WebMessageConstructor = env->GetMethodID(envptr, WebMessageClass, "<init>", "(Ljava/lang/String;)V");
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jobject newwm = env->NewObject(envptr, WebMessageClass, WebMessageConstructor, strjs );
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env->CallVoidMethod( envptr, mc0, postMessageMethod, newwm );
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env->DeleteLocalRef( envptr, newwm );
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env->DeleteLocalRef( envptr, mc0 );
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}
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env->DeleteLocalRef( envptr, strjs );
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env->DeleteLocalRef( envptr, WebViewClass );
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env->DeleteLocalRef( envptr, WebMessageClass );
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env->DeleteLocalRef( envptr, WebMessagePortClass );
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}
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void WebViewRequestRenderToCanvas( WebViewNativeActivityObject * obj )
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{
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const struct JNINativeInterface * env = 0;
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const struct JNINativeInterface ** envptr = &env;
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const struct JNIInvokeInterface ** jniiptr = gapp->activity->vm;
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const struct JNIInvokeInterface * jnii = *jniiptr;
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jnii->AttachCurrentThread( jniiptr, &envptr, NULL);
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env = (*envptr);
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jclass WebViewClass = env->FindClass(envptr, "android/webkit/WebView");
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jmethodID drawMethod = env->GetMethodID(envptr, WebViewClass, "draw", "(Landroid/graphics/Canvas;)V");
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env->CallVoidMethod( envptr, obj->WebViewObject, drawMethod, obj->BackingCanvas );
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env->DeleteLocalRef( envptr, WebViewClass );
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}
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void WebViewNativeGetPixels( WebViewNativeActivityObject * obj, uint32_t * pixel_data, int w, int h )
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{
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const struct JNINativeInterface * env = 0;
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const struct JNINativeInterface ** envptr = &env;
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const struct JNIInvokeInterface ** jniiptr = gapp->activity->vm;
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const struct JNIInvokeInterface * jnii = *jniiptr;
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jnii->AttachCurrentThread( jniiptr, &envptr, NULL);
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env = (*envptr);
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jclass BitmapClass = env->FindClass(envptr, "android/graphics/Bitmap");
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jobject buffer = env->NewDirectByteBuffer(envptr, pixel_data, obj->w*obj->h*4 );
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jmethodID copyPixelsBufferID = env->GetMethodID( envptr, BitmapClass, "copyPixelsToBuffer", "(Ljava/nio/Buffer;)V" );
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env->CallVoidMethod( envptr, obj->BackingBitmap, copyPixelsBufferID, buffer );
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int i;
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int num = obj->w * obj->h;
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for( i = 0; i < num; i++ ) pixel_data[i] = bswap_32( pixel_data[i] );
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env->DeleteLocalRef( envptr, BitmapClass );
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env->DeleteLocalRef( envptr, buffer );
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jnii->DetachCurrentThread( jniiptr );
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}
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void WebViewExecuteJavascript( WebViewNativeActivityObject * obj, const char * js )
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{
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const struct JNINativeInterface * env = 0;
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const struct JNINativeInterface ** envptr = &env;
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const struct JNIInvokeInterface ** jniiptr = gapp->activity->vm;
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const struct JNIInvokeInterface * jnii = *jniiptr;
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jnii->AttachCurrentThread( jniiptr, &envptr, NULL);
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env = (*envptr);
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jclass WebViewClass = env->FindClass(envptr, "android/webkit/WebView");
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jmethodID WebViewEvalJSMethod = env->GetMethodID(envptr, WebViewClass, "evaluateJavascript", "(Ljava/lang/String;Landroid/webkit/ValueCallback;)V");
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//WebView.evaluateJavascript(String script, ValueCallback<String> resultCallback)
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jstring strjs = env->NewStringUTF( envptr, js );
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env->CallVoidMethod( envptr, obj->WebViewObject, WebViewEvalJSMethod, strjs, 0 ); // Tricky: resultCallback = 0, if you try running looper.loop() it will crash - only manually process messages.
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env->DeleteLocalRef( envptr, WebViewClass );
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env->DeleteLocalRef( envptr, strjs );
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}
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char * WebViewGetLastWindowTitle( WebViewNativeActivityObject * obj )
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{
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const struct JNINativeInterface * env = 0;
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const struct JNINativeInterface ** envptr = &env;
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const struct JNIInvokeInterface ** jniiptr = gapp->activity->vm;
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const struct JNIInvokeInterface * jnii = *jniiptr;
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jnii->AttachCurrentThread( jniiptr, &envptr, NULL);
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env = (*envptr);
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jclass WebViewClass = env->FindClass(envptr, "android/webkit/WebView");
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jmethodID getTitle = env->GetMethodID(envptr, WebViewClass, "getTitle", "()Ljava/lang/String;");
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jobject titleObject = env->CallObjectMethod( envptr, obj->WebViewObject, getTitle );
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char *nativeString = strdup( env->GetStringUTFChars(envptr, titleObject, 0) );
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env->DeleteLocalRef( envptr, titleObject );
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env->DeleteLocalRef( envptr, WebViewClass );
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return nativeString;
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}
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#endif
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#endif
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