Android VLC播放器二次开发2——CPU类型检查+界面初始化

//Edited by mythou
//http://www.cnblogs.com/mythou/

　　public void onLowMemory() 
    {
        super.onLowMemory();
        Log.w(TAG, "System is running low on memory");
　　　　　//系统内存降低的时候，回收bitmap缓存
        BitmapCache.getInstance().clear();
    }

//Edited by mythou
//http://www.cnblogs.com/mythou/

　　public static boolean hasCompatibleCPU(Context context)
    {
        if(errorMsg != null || isCompatible) return isCompatible;
　　　　 //读取VLC解码库，这一部分里面还有很多处理，下面会讲解
        ElfData elf = readLib(context.getApplicationInfo().dataDir + "/lib/libvlcjni.so");
        if(elf == null) 
        {
            Log.e(TAG, "WARNING: Unable to read libvlcjni.so; cannot check device ABI!");
            Log.e(TAG, "WARNING: Cannot guarantee correct ABI for this build (may crash)!");
            return true;
        }
　　　　　//记录CPU的类型，注意android2.2以后，会有两个CPU类型
        String CPU_ABI = android.os.Build.CPU_ABI;
        String CPU_ABI2 = "none";
        if(android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) { // CPU_ABI2 since 2.2
            try {
                CPU_ABI2 = (String)android.os.Build.class.getDeclaredField("CPU_ABI2").get(null);
            } catch (Exception e) { }
        }
　　　　 //各种CPU参数记录，对这些不了解，可以百度一下。
        boolean hasNeon = false, hasFpu = false, hasArmV6 = false,
                hasArmV7 = false, hasMips = false, hasX86 = false;
        float bogoMIPS = -1;
        int processors = 0;
　　　　　//判断CPU的架构
        if(CPU_ABI.equals("x86")) 
        {
            hasX86 = true;
        } 
        else if(CPU_ABI.equals("armeabi-v7a") ||
                  CPU_ABI2.equals("armeabi-v7a")) 
        {
            hasArmV7 = true;
            hasArmV6 = true; /* Armv7 is backwards compatible to < v6 */
        } 
        else if(CPU_ABI.equals("armeabi") ||
                  CPU_ABI2.equals("armeabi"))
        {
            hasArmV6 = true;
        }
　　　　　　
　　　　　//......下面还有一些CPU参数识别，这里就省略了
　　　　 //把CPU参数保存起来
        machineSpecs = new MachineSpecs();
        machineSpecs.hasArmV6 = hasArmV6;
        machineSpecs.hasArmV7 = hasArmV7;
        machineSpecs.hasFpu = hasFpu;
        machineSpecs.hasMips = hasMips;
        machineSpecs.hasNeon = hasNeon;
        machineSpecs.hasX86 = hasX86;
        machineSpecs.bogoMIPS = bogoMIPS;
        machineSpecs.processors = processors;
        return true;
    }

//Edited by mythou
//http://www.cnblogs.com/mythou/

　　static {
        try {
            if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.GINGERBREAD_MR1)
                System.loadLibrary("iomx-gingerbread");  //第一个解码库
            else if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.HONEYCOMB_MR2)
                System.loadLibrary("iomx-hc");  //第二个解码库
            else
                System.loadLibrary("iomx-ics");  //第三个解码库
        } catch (Throwable t) {
            Log.w(TAG, "Unable to load the iomx library: " + t);
        }
        try {
            System.loadLibrary("vlcjni");  //第四个解码库
        } catch (UnsatisfiedLinkError ule) {
            Log.e(TAG, "Can't load vlcjni library: " + ule);
            /// FIXME Alert user
            System.exit(1);
        } catch (SecurityException se) {
            Log.e(TAG, "Encountered a security issue when loading vlcjni library: " + se);
            /// FIXME Alert user
            System.exit(1);
        }
    }

//Edited by mythou
//http://www.cnblogs.com/mythou/

　　　　//设置主界面画面
        View v_main = LayoutInflater.from(this).inflate(R.layout.main, null);
        mMenu.setContent(v_main);
        //SlidingMenu的view视图
        View sidebar = LayoutInflater.from(this).inflate(R.layout.sidebar, null);
        final ListView listView = (ListView)sidebar.findViewById(android.R.id.list);
        listView.setFooterDividersEnabled(true);
        mSidebarAdapter = new SidebarAdapter();
        listView.setAdapter(mSidebarAdapter);
        mMenu.setMenu(sidebar);
        //底下的信息条
        mInfoLayout = v_main.findViewById(R.id.info_layout);
        mInfoProgress = (ProgressBar) v_main.findViewById(R.id.info_progress);
        mInfoText = (TextView) v_main.findViewById(R.id.info_text);
        //ActionBar初始化
        prepareActionBar();

//Edited by mythou
//http://www.cnblogs.com/mythou/

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <!-- 这里的FrameLayout负责显示切换的Fragment,是整个程序界面的主要显示模块-->
    <FrameLayout 
        android:id="@+id/fragment_placeholder"
        android:layout_weight="1"
        android:layout_width="fill_parent"
        android:layout_height="0dip" />
  
　　<!--  下面缩略图生成进度-->  
    <RelativeLayout
        android:id="@+id/info_layout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:visibility="gone">
        <ProgressBar
            android:id="@+id/info_progress"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:progressDrawable="@drawable/progress"/>
        <TextView
            android:id="@+id/info_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dip"
            android:layout_marginRight="5dip"
            android:singleLine="true"
            android:textColor="#FFFFFFFF"
            android:shadowColor="#CC000000"
            android:shadowRadius="1.5"
            android:shadowDx="1"
            android:shadowDy="1"/>
    </RelativeLayout>
  
   <!-- 音乐后台播放的小的控制台-->
    <FrameLayout
        android:id="@+id/audio_mini_player"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent"/>
</LinearLayout>