Android通過檔案路徑如何得到檔案相關資訊，如 檔名稱，檔案大小，建立時間，檔案的相對路徑，檔案的絕對路徑等。

如圖：

public class MainActivity extends Activity {

	private String path = "/storage/emulated/0/Android/data/cn.wps.moffice_eng/mm.doc";
	private TextView mTextView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
	}

	@SuppressLint("SimpleDateFormat")
	private void initView() {
		// TODO Auto-generated method stub
		mTextView = (TextView) findViewById(R.id.textview);
		File f = new File(path);
		if (f.exists()) {
			FileInputStream fis = null;
			try {
				fis = new FileInputStream(f);
				String time = new SimpleDateFormat("yyyy-MM-dd")
						.format(new Date(f.lastModified()));
				System.out.println("檔案檔案建立時間" + time);
				System.out.println("檔案大小:" + ShowLongFileSzie(f.length()));// 計算檔案大小
																			// B,KB,MB,
				System.out.println("檔案大小:" + fis.available() + "B");
				System.out.println("檔名稱：" + f.getName());
				System.out.println("檔案是否存在：" + f.exists());
				System.out.println("檔案的相對路徑：" + f.getPath());
				System.out.println("檔案的絕對路徑：" + f.getAbsolutePath());
				System.out.println("檔案可以讀取：" + f.canRead());
				System.out.println("檔案可以寫入：" + f.canWrite());
				System.out.println("檔案上級路徑：" + f.getParent());
				System.out.println("檔案大小：" + f.length() + "B");
				System.out.println("檔案最後修改時間：" + new Date(f.lastModified()));
				System.out.println("是否是檔案型別：" + f.isFile());
				System.out.println("是否是資料夾型別：" + f.isDirectory());
				mTextView.setText("檔案檔案建立時間:" + time + "\n" + "檔案大小:"
						+ ShowLongFileSzie(f.length()) + "\n" + "檔名稱："
						+ f.getName() + "\n" + "檔案是否存在：" + f.exists() + "\n"
						+ "檔案的相對路徑：" + f.getPath() + "\n" + "檔案的絕對路徑："
						+ f.getAbsolutePath() + "\n" + "檔案可以寫入：" + f.canWrite()
						+ "\n" + "是否是資料夾型別：" + f.isDirectory());
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

	/****
	 * 計算檔案大小
	 * 
	 * @param length
	 * @return
	 */
	public String ShowLongFileSzie(Long length) {
		if (length >= 1048576) {
			return (length / 1048576) + "MB";
		} else if (length >= 1024) {
			return (length / 1024) + "KB";
		} else if (length < 1024) {
			return length + "B";
		} else {
			return "0KB";
		}
	}

}
 

<!-- SD卡許可權 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />