计算SDCard上的容量

计算SDCard上的容量

使用的类：StatFs,此类保存的是对SDCard上容量的一些信息。

1、返回剩余的快：getBlockCount()

2、返回总共的快：getBlockCount（）

3、返回一个快的大小：getBlockSize()

4、返回剩余的快（包括系统预留无法访问的）：getAvailableBlocks()

 

例子：

package lyx.feng.other;   import lyx.feng.simpletextdemo.R; import android.app.Activity; import android.os.Bundle; import android.os.Environment; import android.os.StatFs; import android.widget.TextView;   public class StatFsActivity extends Activity {     private TextView tv = null;     private StringBuffer buffer = null;     private StatFs statFs = null;       @Override     protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        super.setContentView(R.layout.statfs);        this.tv = (TextView) super.findViewById(R.id.statfs_tv);        this.buffer = new StringBuffer();        this.getStringBuffer();        this.tv.setText(this.buffer.toString());     }       @SuppressWarnings("deprecation")     private void getStringBuffer() {        if (Environment.getExternalStorageState().equals(               Environment.MEDIA_MOUNTED)) {            this.statFs = new StatFs(Environment.getExternalStorageDirectory()                   .getPath());            this.buffer.append("总快：" + this.statFs.getBlockCount() + "\n");            this.buffer                   .append("可用快：" + this.statFs.getAvailableBlocks() + "\n");            this.buffer.append("快的大小：" + this.statFs.getBlockSize() + "\n");            this.buffer.append("剩余快（全）：" + this.statFs.getFreeBlocks() + "\n");            this.buffer.append("全部大小：" + (long) this.statFs.getBlockCount()                   * this.statFs.getBlockSize() / 1024 / 1024 + "\n");            this.buffer.append("剩余大小："                   + (long) this.statFs.getAvailableBlocks()                   * this.statFs.getBlockSize() / 1024 / 1024 + "\n");          }     } }

效果：