Android开发之获取SD卡及手机ROM容量的方法

package com.urovo.sdcardspace;
import java.io.File;
import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.app.Activity;
import android.text.format.Formatter;
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);
    TextView tv = (TextView) findViewById(R.id.tv);
    File path = Environment.getExternalStorageDirectory();//得到SD卡的路径
    StatFs stat = new StatFs(path.getPath());//创建StatFs对象，用来获取文件系统的状态
    long blockCount = stat.getBlockCount();
    long blockSize = stat.getBlockSize();
    long availableBlocks = stat.getAvailableBlocks();
    String totalSize = Formatter.formatFileSize(getApplicationContext(), blockCount*blockSize);//格式化获得SD卡总容量
    String availableSize = Formatter.formatFileSize(getApplicationContext(), blockCount*availableBlocks);//获得SD卡可用容量
    tv.setText("SD卡总容量:"+totalSize+"\nSD卡可用容量:"+availableSize+"\n"+getRomSpace());
  }
  private String getRomSpace() {
    File path = Environment.getDataDirectory();
    StatFs stat = new StatFs(path.getPath());
    long blockCount = stat.getBlockCount();
    long blockSize = stat.getBlockSize();
    long availableBlocks = stat.getAvailableBlocks();
    String totalSize = Formatter.formatFileSize(getApplicationContext(), blockCount*blockSize);
    String availableSize = Formatter.formatFileSize(getApplicationContext(), blockCount*availableBlocks);
    return "手机Rom总容量:"+totalSize+"\n手机Rom可用容量:"+availableSize;
  }
}