【第四篇章-android平台MediaCodec】推断是否支持硬件解码码

public boolean isSupportMediaCodecHardDecoder(){
    boolean isHardcode = false;
    //读取系统配置文件/system/etc/media_codecc.xml
    File file = new File("/system/etc/media_codecs.xml");
    InputStream inFile = null;
    try {
      inFile = new FileInputStream(file);
    } catch (Exception e) {
        // TODO: handle exception
    }
 
    if(inFile != null) {
        XmlPullParserFactory pullFactory;
        try {
            pullFactory = XmlPullParserFactory.newInstance();
            XmlPullParser xmlPullParser = pullFactory.newPullParser();
            xmlPullParser.setInput(inFile, "UTF-8");
            int eventType = xmlPullParser.getEventType();
            while (eventType != XmlPullParser.END_DOCUMENT) {
                String tagName = xmlPullParser.getName();
                switch (eventType) {
                case XmlPullParser.START_TAG:
                    if ("MediaCodec".equals(tagName)) {
                        String componentName = xmlPullParser.getAttributeValue(0);
 
                        if(componentName.startsWith("OMX."))
                        {
                            if(!componentName.startsWith("OMX.google."))
                            {
                                isHardcode = true;
                            }
                        }
                    }
                }
                eventType = xmlPullParser.next();
            }
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
    return isHardcode;
}