查看Android不同版本API的地址為：

https://developer.android.google.cn/reference/packages

選擇對(duì)應(yīng)的Android版本，查看對(duì)應(yīng)的Android模塊，即可查找到對(duì)應(yīng)版本的API參考文檔：

//計(jì)算EMMC和DDR
        TextView txEmmcTotal = v.findViewById(R.id.txEmmcTotal);
        TextView txDDRTotal = v.findViewById(R.id.txDDRTotal);
        TextView txEmmcRest = v.findViewById(R.id.txEmmcRest);
        TextView txDDRRest = v.findViewById(R.id.txDDRRest);

        
        ActivityManager activityManager = (ActivityManager) requireActivity().getSystemService(Context.ACTIVITY_SERVICE);
        ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
        activityManager.getMemoryInfo(memoryInfo);
        
        float totalMemory = (float)memoryInfo.totalMem/(1024 * 1024 * 1024);
        Log.e(TAG, "setVersionInfo: totalMemory= "+ String.format("%.2f",totalMemory) + 'G');
        txEmmcTotal.setText(String.format("%.2f",totalMemory) + "GB");
        
        float availMemory = (float)memoryInfo.availMem/(1024*1024*1024);
        Log.e(TAG, "setVersionInfo: availMemory= "+ String.format("%.2f",availMemory) + "GB");
        txEmmcRest.setText(String.format("%.2f",availMemory) + "GB");


         //系統(tǒng)文件大小
        StatFs stat = new StatFs(Environment.getRootDirectory().getAbsolutePath());
        long systemSize = stat.getTotalBytes();
        Log.e(TAG, "setVersionInfo: systemSize= "+ String.format("%.2f",systemSize/(1024f * 1024 * 1024)) + "GB");
        txDDRTotal.setText(String.format("%.2f",systemSize/(1024f * 1024 * 1024)) + "GB");

        long availableSize = stat.getAvailableBytes();
        Log.e(TAG, "setVersionInfo: availableSize="+ String.format("%.2f",availableSize/(1024f * 1024 * 1024)) + "GB");
        txDDRRest.setText(String.format("%.2f",availableSize/(1024f * 1024 * 1024)) + "GB");

        //內(nèi)部sd存儲(chǔ)空間大小
//        StatFs stat1 = new StatFs(Environment.getExternalStorageDirectory().getAbsolutePath());
//        Log.e(TAG, "setVersionInfo: getExternalStorageDirectory="+Environment.getExternalStorageDirectory().getAbsolutePath());
//        long internal_sd_totalBlocks = stat1.getBlockCountLong();// 獲取block數(shù)量
//        long internal_sd_blockSize = stat1.getBlockSizeLong();
//        long internal_sd_totalSize = internal_sd_blockSize *  internal_sd_totalBlocks;
//        Log.e(TAG, "setVersionInfo: internal_sd_totalSize="+ String.format("%.2f",internal_sd_totalSize/(1024f * 1024 * 1024)) + "GB");