Android获取手机内存和sd卡相关信息

private String[] getPhoneMemory() {
String[] result = {"",""};  //1-total 2-avail
ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

am.getMemoryInfo(mi);
long mTotalMem = 0;
long mAvailMem = mi.availMem;
String str1 = "/proc/meminfo";
String str2;
String[] arrayOfString;
try {
FileReader localFileReader = new FileReader(str1);
BufferedReader localBufferedReader = new BufferedReader(localFileReader, 8192);
str2 = localBufferedReader.readLine();
arrayOfString = str2.split("\\s+");
mTotalMem = Integer.valueOf(arrayOfString[1]).intValue() * 1024;
localBufferedReader.close();
} catch (IOException e) {
e.printStackTrace();
}
result[0] = Formatter.formatFileSize(this, mTotalMem);
result[1] = Formatter.formatFileSize(this, mAvailMem);
return result;
}

public long getAvailaleSize() {// sd卡信息（可用）
File path = Environment.getExternalStorageDirectory(); // 取得sdcard文件路径
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return availableBlocks * blockSize/1024 /1024;
}

public long getAllSize() {//总大小
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getBlockCount();
return availableBlocks * blockSize/1024 /1024;
}