Android获取手机和SD卡的存储存储信息

<pre name="code" class="java">import java.io.File;

import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.support.v7.app.ActionBarActivity;
import android.text.format.Formatter;
import android.widget.TextView;

/**
* 从Android源码的Settings中找到的获取内存状态的代码
*
*
* File path = Environment.getExternalStorageDirectory(); StatFs stat = new
* StatFs(path.getPath()); long blockSize = stat.getBlockSize(); long
* totalBlocks = stat.getBlockCount(); long availableBlocks =
* stat.getAvailableBlocks();
*
* mSdSize.setSummary(formatSize(totalBlocks * blockSize));
* mSdAvail.setSummary(formatSize(availableBlocks * blockSize) + readOnly);
*
* @author Administrator
*
*/
public class MainActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView textView = (TextView) findViewById(R.id.tv_memoryState);
// 获取SD卡的存储状态
File SDdir = Environment.getExternalStorageDirectory();
String SDMemory = getMemoryState(SDdir);
// 获取手机内存的存储状态
File DeviceDir = Environment.getDataDirectory();
String DeviceMemory = getMemoryState(DeviceDir);
String tv_content = "SD卡内存状态：" + SDMemory + ".手机内存状态：" + DeviceMemory;
textView.setText(tv_content);
}

/**
* 获取内存状态
*/
private String getMemoryState(File path) {

// 获取手机或sd卡的存储空间的所有信息
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();// 获取单个扇区的尺寸
long totalBlocks = stat.getBlockCount();// 获取所有的扇区数
long availableBlocks = stat.getAvailableBlocks();// 获取可用的扇区数
String totalSize = Formatter.formatFileSize(this, totalBlocks
* blockSize);
String availSize = Formatter.formatFileSize(this, availableBlocks
* blockSize);
return "总空间:" + totalSize + ";可用空间：" + availSize + ",";
}
}