Android獲取手機中內外存儲卡

    public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test_main_layout);
                 /設備管理器*/
StorageManager storageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
try {
Class<?>[] paramClasses = {};
/反射實現/
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類主要用來獲取文件系統的狀態，能夠獲取sd卡的大小和剩余空間，獲取系統內部空間也就是/system的大小和剩余空間等等。/
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;
}
      /*計算存儲卡的可用容量（單位:M）/
private float calculateSizeInMB(StatFs stat) {
if (stat != null)
   return stat.getAvailableBlocks()  (stat.getBlockSize() / (1024f  1024f));
return 0.0f;
}
}</pre>