android4.0 判断是否有语音麦克功能

NavigationBarTablet.javasetSearchMode方法中判断是否有语音模块,若有则显示,没有则不显示。

privateResolveInfo getResolveInfo() {

         Intent intent =createVoiceSearchIntent();

         ResolveInfo ri = mContext.getPackageManager().

        resolveActivity(intent,PackageManager.MATCH_DEFAULT_ONLY);

         return ri;

}

protectedIntent createVoiceSearchIntent() {

         return newIntent(RecognizerIntent.ACTION_WEB_SEARCH);

}

通过 getResolveInfo() 返回值是否为空判断语音模块是否可用, null (不可)用; !=null (可用)

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