Android获取手机中内外存储卡，android存储卡, public c

Android获取手机中内外存储卡，android存储卡, public c

    public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.test_main_layout);                 /**设备管理器*/StorageManager storageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);try {Class<?>[] paramClasses = {};/**反射实现*/Method getVolumePathsMethod = StorageManager.class.getMethod("getVolumePaths", paramClasses);getVolumePathsMethod.setAccessible(true);Object[] params = {};Object invoke = getVolumePathsMethod.invoke(storageManager, params);for (int i = 0; i < ((String[]) invoke).length; i++) {/** Android.os下的StatFs类主要用来获取文件系统的状态，能够获取sd卡的大小和剩余空间，获取系统内部空间也就是/system的大小和剩余空间等等。*/StatFs stat = getStatFs(((String[]) invoke)[i]);Log.i("ldm", ((String[]) invoke)[i] + ":" + calculateSizeInMB(stat));}}catch (Exception e1) {e1.printStackTrace();}}private StatFs getStatFs(String path) {try {return new StatFs(path);}catch (Exception e) {e.printStackTrace();}return null;}      /**计算存储卡的可用容量（单位:M）*/private float calculateSizeInMB(StatFs stat) {if (stat != null)   return stat.getAvailableBlocks() * (stat.getBlockSize() / (1024f * 1024f));return 0.0f;}}