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.view.View;  
    import android.widget.TextView;  
      
    public class MainActivity extends Activity {  
      
        @Override  
        protected void onCreate(Bundle savedInstanceState) {  
            super.onCreate(savedInstanceState);  
            setContentView(R.layout.activity_main);  
              
            TextView tvMemoryInfo = (TextView) findViewById(R.id.tv_memory_info);  
              
            // 获得sd卡的内存状态  
            File sdcardFileDir = Environment.getExternalStorageDirectory();  
            String sdcardMemory = getMemoryInfo(sdcardFileDir);  
              
            // 获得手机内部存储控件的状态  
            File dataFileDir = Environment.getDataDirectory();  
            String dataMemory = getMemoryInfo(dataFileDir);  
              
            tvMemoryInfo.setText("SD卡: " + sdcardMemory + "\n手机内部: " + dataMemory);  
        }  
      
        /** 
         * 根据路径获取内存状态 
         * @param path 
         * @return 
         */  
        private String getMemoryInfo(File path) {  
            // 获得一个磁盘状态对象  
            StatFs stat = new StatFs(path.getPath());  
              
            long blockSize = stat.getBlockSize();   // 获得一个扇区的大小  
              
            long totalBlocks = stat.getBlockCount();    // 获得扇区的总数  
              
            long availableBlocks = stat.getAvailableBlocks();   // 获得可用的扇区数量  
              
            // 总空间  
            String totalMemory =  Formatter.formatFileSize(this, totalBlocks * blockSize);  
            // 可用空间  
            String availableMemory = Formatter.formatFileSize(this, availableBlocks * blockSize);  
              
            return "总空间: " + totalMemory + "\n可用空间: " + availableMemory;  
        }  
    }