android获取存储卡使用情况

 1 package com.aib.com;
 2 
 3 import java.io.File;
 4 import android.app.Activity;
 5 import android.os.Bundle;
 6 import android.os.Environment;
 7 import android.os.StatFs;
 8 import android.text.format.Formatter;
 9 import android.util.Log;
10 import android.view.Menu;
11 import android.widget.TextView;
12 
13 public class MainActivity extends Activity {
14 
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.activity_main);
19         getSDcardMemory();
20     }
21 
22     public void getSDcardMemory() {
23         /** 获取存储卡路径 */
24          File sdcardDir = Environment.getExternalStorageDirectory();
25         /** 获取手机内存路径 */
26     //    File Dir = Environment.getDataDirectory();
27         /** StatFs 看文件系统空间使用情况 */
28         StatFs statFs = new StatFs(sdcardDir.getPath());
29         /** Block 的 size */
30         int blockSize = statFs.getBlockSize();
31         /** 总 Block 数量 */
32         int totalBlocks = statFs.getBlockCount();
33         /** 可用的 Block 数量 */
34         int availableBlocks = statFs.getAvailableBlocks();
35         /**
36          * android.text.format.Formatter :Utility class to aid in formatting
37          * common values that are not covered by the standard
38          * java.util.Formatter.
39          */
40         Log.i("aib", blockSize +"---"+totalBlocks+"----"+availableBlocks);
41         String totaoSize = Formatter.formatFileSize(MainActivity.this,
42                 totalBlocks * blockSize);
43         String availSize = Formatter.formatFileSize(MainActivity.this,
44                 availableBlocks * blockSize);
45         TextView tv = (TextView) findViewById(R.id.tv);
46         tv.setText(sdcardDir.getPath()+ "\n总空间： "
47                 + totaoSize +"\n可用空间："+ availSize);
48     }
49 
50     @Override
51     public boolean onCreateOptionsMenu(Menu menu) {
52         // Inflate the menu; this adds items to the action bar if it is present.
53         getMenuInflater().inflate(R.menu.main, menu);
54         return true;
55     }
56 
57 }