Android获取手机内存、SD卡总容量和剩余容量，androidsd, import j

Android获取手机内存、SD卡总容量和剩余容量，androidsd, import j

    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;          }      }