Android通過文件路徑如何得到文件相關(guān)信息，如 文件名稱，文件大小，創(chuàng)建時(shí)間，文件的相對(duì)路徑，文件的絕對(duì)路徑等。

如圖：

image

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("文件文件創(chuàng)建時(shí)間" + time);
                System.out.println("文件大小:" + ShowLongFileSzie(f.length()));// 計(jì)算文件大小
                                                                            // B,KB,MB,
                System.out.println("文件大小:" + fis.available() + "B");
                System.out.println("文件名稱：" + f.getName());
                System.out.println("文件是否存在：" + f.exists());
                System.out.println("文件的相對(duì)路徑：" + f.getPath());
                System.out.println("文件的絕對(duì)路徑：" + f.getAbsolutePath());
                System.out.println("文件可以讀取：" + f.canRead());
                System.out.println("文件可以寫入：" + f.canWrite());
                System.out.println("文件上級(jí)路徑：" + f.getParent());
                System.out.println("文件大?。? + f.length() + "B");
                System.out.println("文件最后修改時(shí)間：" + new Date(f.lastModified()));
                System.out.println("是否是文件類型：" + f.isFile());
                System.out.println("是否是文件夾類型：" + f.isDirectory());
                mTextView.setText("文件文件創(chuàng)建時(shí)間:" + time + "\n" + "文件大小:"
                        + ShowLongFileSzie(f.length()) + "\n" + "文件名稱："
                        + f.getName() + "\n" + "文件是否存在：" + f.exists() + "\n"
                        + "文件的相對(duì)路徑：" + f.getPath() + "\n" + "文件的絕對(duì)路徑："
                        + f.getAbsolutePath() + "\n" + "文件可以寫入：" + f.canWrite()
                        + "\n" + "是否是文件夾類型：" + f.isDirectory());
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    /****
     * 計(jì)算文件大小
     * 
     * @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";
        }
    }

}

不要忘記在AndroidManifest.xml加權(quán)限哦！

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

源碼點(diǎn)擊下載：https://github.com/DickyQie/android-file