package com.aib.com;

 import java.io.File;

 import android.app.Activity;

 import android.os.Bundle;

 import android.os.Environment;

 import android.os.StatFs;

 import android.text.format.Formatter;

 import android.util.Log;

 import android.view.Menu;

 import android.widget.TextView;

 public class MainActivity extends Activity {

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         getSDcardMemory();

     }

     public void getSDcardMemory() {

         /** 获取存储卡路径 */

          File sdcardDir = Environment.getExternalStorageDirectory();

         /** 获取手机内存路径 */

     //    File Dir = Environment.getDataDirectory();

         /** StatFs 看文件系统空间使用情况 */

         StatFs statFs = new StatFs(sdcardDir.getPath());

         /** Block 的 size */

         int blockSize = statFs.getBlockSize();

         /** 总 Block 数量 */

         int totalBlocks = statFs.getBlockCount();

         /** 可用的 Block 数量 */

         int availableBlocks = statFs.getAvailableBlocks();

         /**

          * android.text.format.Formatter :Utility class to aid in formatting

          * common values that are not covered by the standard

          * java.util.Formatter.

          */

         Log.i("aib", blockSize +"---"+totalBlocks+"----"+availableBlocks);

         String totaoSize = Formatter.formatFileSize(MainActivity.this,

                 totalBlocks * blockSize);

         String availSize = Formatter.formatFileSize(MainActivity.this,

                 availableBlocks * blockSize);

         TextView tv = (TextView) findViewById(R.id.tv);

         tv.setText(sdcardDir.getPath()+ "\n总空间： "

                 + totaoSize +"\n可用空间："+ availSize);

     }

     @Override

     public boolean onCreateOptionsMenu(Menu menu) {

         // Inflate the menu; this adds items to the action bar if it is present.

         getMenuInflater().inflate(R.menu.main, menu);

         return true;

     }

 }