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     @Override16     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 formatting37          * common values that are not covered by the standard38          * 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     @Override51     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 }
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