Android Browser 支持屏蔽webaudio的功能

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本文为极度寒冰原创，转载请注明出处

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在android浏览器中，我们都知道可以设置屏蔽image，即选择image是否加载。

同样的道理，那既然在webkit中提供了webaudio的接口，那我们也可以实现这个功能。

具体实现如下：

Package/app/Browser中的修改如下：

diff --git a/res/values/strings.xml b/res/values/strings.xml
index 41e2fd9..7389f34 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -338,6 +338,10 @@
     Allow multiple tabs per app
     
     Load images
+    
+    Load audio
+    Play audio on web pages
+    
     
     Display images on web pages
      
diff --git a/res/xml/bandwidth_preferences.xml b/res/xml/bandwidth_preferences.xml
index 1762b80..ae00881 100644
--- a/res/xml/bandwidth_preferences.xml
+++ b/res/xml/bandwidth_preferences.xml
@@ -37,7 +37,13 @@
         android:defaultValue="true"
         android:title="@string/pref_content_load_images"
         android:summary="@string/pref_content_load_images_summary" />
-
+
+    
+
     


在framework中的修改如下：

diff --git a/core/java/android/webkit/WebSettings.java b/core/java/android/webkit/WebSettings.java
index aa68904..da2c61e 100644
--- a/core/java/android/webkit/WebSettings.java
+++ b/core/java/android/webkit/WebSettings.java
@@ -848,6 +848,12 @@ public abstract class WebSettings {
         throw new MustOverrideException();
     }
 
+    // -- add by chao 
+    public synchronized void setLoadsAudioAutomatically(boolean flag) {
+        throw new MustOverrideException();
+    }
+
+    // add by chao
     /**
      * Gets whether the WebView loads image resources. This includes
      * images embedded using the data URI scheme.*/
@@ -859,6 +865,12 @@ public abstract class WebSettings {
         throw new MustOverrideException();
     }
 
+    // -- add by chao
+    public synchronized boolean getLoadsAudioAutomatically() {
+        throw new MustOverrideException();
+    }
+    // add by chao --
+
     /**
      * Sets whether the WebView should not load image resources from the
      * network (resources accessed via http and https URI schemes).  Note*/
diff --git a/core/java/android/webkit/WebSettingsClassic.java b/core/java/android/webkit/WebSettingsClassic.java
index 73968a7..0614c5a 100644
--- a/core/java/android/webkit/WebSettingsClassic.java
+++ b/core/java/android/webkit/WebSettingsClassic.java
@@ -62,6 +62,7 @@ import android.os.Message;
 import android.provider.Settings;
 import android.provider.Settings.SettingNotFoundException;
 import android.util.EventLog;
+import android.util.Log;
 import android.os.SystemProperties;
 import java.util.Locale;
 
@@ -116,6 +117,9 @@ public class WebSettingsClassic extends WebSettings {
     private int             mDefaultFixedFontSize = 13;
     private int             mPageCacheCapacity = 0;
     private boolean         mLoadsImagesAutomatically = true;
+    // -- add by chao
+    private boolean         mLoadsAudioAutomatically = true;
+    // add by chao --
     private boolean         mBlockNetworkImage = false;
     private boolean         mBlockNetworkLoads;
     private boolean         mJavaScriptEnabled = false;
@@ -1142,6 +1146,16 @@ public class WebSettingsClassic extends WebSettings {
         }
     }
 
+    // -- add by chao
+    @Override
+    public synchronized void setLoadsAudioAutomatically(boolean flag) {
+        if (mLoadsAudioAutomatically != flag) {
+            Log.d("chao","setLoadsAudioAutomatically flag = " + flag);
+            mLoadsAudioAutomatically = flag;
+            postSync();
+        }
+    }
+    // add by chao --
     /**
      * @see android.webkit.WebSettings#getLoadsImagesAutomatically()
      */
@@ -1149,6 +1163,13 @@ public class WebSettingsClassic extends WebSettings {
     public synchronized boolean getLoadsImagesAutomatically() {
         return mLoadsImagesAutomatically;
     }
+  
+    // -- add by chao
+    @Override
+    public synchronized boolean getLoadsAudioAutomatically() {
+        return mLoadsAudioAutomatically;
+    }
+    // add by chao
 
     /**
      * @see android.webkit.WebSettings#setBlockNetworkImage(boolean)

extern中的修改如下：

diff --git a/Source/WebCore/page/Settings.cpp b/Source/WebCore/page/Settings.cpp
index 79e38d1..6dfc878 100644
--- a/Source/WebCore/page/Settings.cpp
+++ b/Source/WebCore/page/Settings.cpp
@@ -40,7 +40,7 @@
 #include "ResourceHandle.h"
 #include "StorageMap.h"
 #include 
-
+#include "AndroidLog.h"
 using namespace std;
 
 namespace WebCore {
@@ -917,6 +917,7 @@ void Settings::setShouldUseHighResolutionTimers(bool shouldUseHighResolutionTime
 
 void Settings::setWebAudioEnabled(bool enabled)
 {
+    ALOGE("setWebAudioEnable = %d  --chao\n", enabled);
     m_webAudioEnabled = enabled;
 }
 
diff --git a/Source/WebKit/android/jni/WebSettings.cpp b/Source/WebKit/android/jni/WebSettings.cpp
index fe5ae0b..8348f6b 100644
--- a/Source/WebKit/android/jni/WebSettings.cpp
+++ b/Source/WebKit/android/jni/WebSettings.cpp
@@ -61,6 +61,7 @@
 #include 
 #include 
 
+#include "AndroidLog.h"
 #include "ApplicationCacheStorage.h"
 #include "BitmapAllocatorAndroid.h"
 #include "CachedResourceLoader.h"
@@ -127,6 +128,9 @@ struct FieldIds {
         mDefaultFontSize = env->GetFieldID(clazz, "mDefaultFontSize", "I");
         mDefaultFixedFontSize = env->GetFieldID(clazz, "mDefaultFixedFontSize", "I");
         mLoadsImagesAutomatically = env->GetFieldID(clazz, "mLoadsImagesAutomatically", "Z");
+// add by chao
+        mLoadsAudioAutomatically = env->GetFieldID(clazz, "mLoadsAudioAutomatically", "Z");
+// add by chao end
 #ifdef ANDROID_BLOCK_NETWORK_IMAGE
         mBlockNetworkImage = env->GetFieldID(clazz, "mBlockNetworkImage", "Z");
 #endif
@@ -216,6 +220,9 @@ struct FieldIds {
         ALOG_ASSERT(mDefaultFontSize, "Could not find field mDefaultFontSize");
         ALOG_ASSERT(mDefaultFixedFontSize, "Could not find field mDefaultFixedFontSize");
         ALOG_ASSERT(mLoadsImagesAutomatically, "Could not find field mLoadsImagesAutomatically");
+// add by chao 
+        ALOG_ASSERT(mLoadsAudioAutomatically, "Could not find field mLoadsAudioAutomatically");
+// add by chao --
 #ifdef ANDROID_BLOCK_NETWORK_IMAGE
         ALOG_ASSERT(mBlockNetworkImage, "Could not find field mBlockNetworkImage");
 #endif
@@ -277,6 +284,9 @@ struct FieldIds {
     jfieldID mDefaultFontSize;
     jfieldID mDefaultFixedFontSize;
     jfieldID mLoadsImagesAutomatically;
+// --add by chao
+    jfieldID mLoadsAudioAutomatically;
+// add by chao --
 #ifdef ANDROID_BLOCK_NETWORK_IMAGE
     jfieldID mBlockNetworkImage;
 #endif
@@ -471,6 +481,11 @@ public:
         if (flag)
             cachedResourceLoader->setAutoLoadImages(true);
 
+// -- add by chao
+        flag = env->GetBooleanField(obj, gFieldIds->mLoadsAudioAutomatically);
+        ALOGE("setWebAudioEnabled = %d  --chao \n", flag);
+        s->setWebAudioEnabled(flag);
+// add by chao --
 #ifdef ANDROID_BLOCK_NETWORK_IMAGE
         flag = env->GetBooleanField(obj, gFieldIds->mBlockNetworkImage);
         s->setBlockNetworkImage(flag);

在browser的设置中，我们就可以看到并使用这个选项了。